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Split benchmarks and test tools into separate targets.

Browse source 
This lets us remove main() from snappy_bench.cc and snappy_unittest.cc,
which simplifies integrating these tests and benchmarks with other
suites.

PiperOrigin-RevId: 347857427
This commit is contained in:
Victor Costan 2020-12-16 19:07:59 +00:00
parent 0793e2ae2d
commit 4ebd8b2f23
10 changed files with 1349 additions and 1061 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
.appveyor.yml
View file

@ -34,3 +34,4 @@ build_script:
test_script:
- build\%CONFIGURATION%\snappy_unittest
- build\%CONFIGURATION%\snappy_benchmark

1
.travis.yml
View file

@ -90,6 +90,7 @@ before_script:
script:
- build/snappy_unittest
- build/snappy_benchmark
- if [ -f build/snappy_compress_fuzzer ]; then
build/snappy_compress_fuzzer -runs=1000 -close_fd_mask=3;
fi

776
CMakeLists.txt
View file

@ -1,372 +1,404 @@
# Copyright 2019 Google Inc. All Rights Reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
cmake_minimum_required(VERSION 3.1)
project(Snappy VERSION 1.1.8 LANGUAGES C CXX)
# C++ standard can be overridden when this is used as a sub-project.
if(NOT CMAKE_CXX_STANDARD)
# This project requires C++11.
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
endif(NOT CMAKE_CXX_STANDARD)
# https://github.com/izenecloud/cmake/blob/master/SetCompilerWarningAll.cmake
if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# Use the highest warning level for Visual Studio.
set(CMAKE_CXX_WARNING_LEVEL 4)
if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
else(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
endif(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
# Disable C++ exceptions.
string(REGEX REPLACE "/EH[a-z]+" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHs-c-")
add_definitions(-D_HAS_EXCEPTIONS=0)
# Disable RTTI.
string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# Use -Wall for clang and gcc.
if(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
endif(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")
# Use -Wextra for clang and gcc.
if(NOT CMAKE_CXX_FLAGS MATCHES "-Wextra")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wextra")
endif(NOT CMAKE_CXX_FLAGS MATCHES "-Wextra")
# Use -Werror for clang only.
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
if(NOT CMAKE_CXX_FLAGS MATCHES "-Werror")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
endif(NOT CMAKE_CXX_FLAGS MATCHES "-Werror")
endif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
# Disable C++ exceptions.
string(REGEX REPLACE "-fexceptions" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
# Disable RTTI.
string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make
# it prominent in the GUI.
option(BUILD_SHARED_LIBS "Build shared libraries(DLLs)." OFF)
option(SNAPPY_BUILD_TESTS "Build Snappy's own tests." ON)
option(SNAPPY_FUZZING_BUILD "Build Snappy for fuzzing." OFF)
option(SNAPPY_REQUIRE_AVX "Target processors with AVX support." OFF)
option(SNAPPY_REQUIRE_AVX2 "Target processors with AVX2 support." OFF)
option(SNAPPY_INSTALL "Install Snappy's header and library" ON)
include(TestBigEndian)
test_big_endian(SNAPPY_IS_BIG_ENDIAN)
include(CheckIncludeFile)
check_include_file("sys/mman.h" HAVE_SYS_MMAN_H)
check_include_file("sys/resource.h" HAVE_SYS_RESOURCE_H)
check_include_file("sys/time.h" HAVE_SYS_TIME_H)
check_include_file("sys/uio.h" HAVE_SYS_UIO_H)
check_include_file("unistd.h" HAVE_UNISTD_H)
check_include_file("windows.h" HAVE_WINDOWS_H)
include(CheckLibraryExists)
check_library_exists(z zlibVersion "" HAVE_LIBZ)
check_library_exists(lzo2 lzo1x_1_15_compress "" HAVE_LIBLZO2)
check_library_exists(lz4 LZ4_compress_default "" HAVE_LIBLZ4)
include(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG("/arch:AVX" HAVE_VISUAL_STUDIO_ARCH_AVX)
CHECK_CXX_COMPILER_FLAG("/arch:AVX2" HAVE_VISUAL_STUDIO_ARCH_AVX2)
CHECK_CXX_COMPILER_FLAG("-mavx" HAVE_CLANG_MAVX)
CHECK_CXX_COMPILER_FLAG("-mbmi2" HAVE_CLANG_MBMI2)
if(SNAPPY_REQUIRE_AVX2)
if(HAVE_VISUAL_STUDIO_ARCH_AVX2)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /arch:AVX2")
endif(HAVE_VISUAL_STUDIO_ARCH_AVX2)
if(HAVE_CLANG_MAVX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx")
endif(HAVE_CLANG_MAVX)
if(HAVE_CLANG_MBMI2)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mbmi2")
endif(HAVE_CLANG_MBMI2)
elseif (SNAPPY_REQUIRE_AVX)
if(HAVE_VISUAL_STUDIO_ARCH_AVX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /arch:AVX")
endif(HAVE_VISUAL_STUDIO_ARCH_AVX)
if(HAVE_CLANG_MAVX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx")
endif(HAVE_CLANG_MAVX)
endif(SNAPPY_REQUIRE_AVX2)
# Used by googletest.
check_cxx_compiler_flag(-Wno-missing-field-initializers
SNAPPY_HAVE_NO_MISSING_FIELD_INITIALIZERS)
include(CheckCXXSourceCompiles)
check_cxx_source_compiles("
int main() {
return __builtin_expect(0, 1);
}" HAVE_BUILTIN_EXPECT)
check_cxx_source_compiles("
int main() {
return __builtin_ctzll(0);
}" HAVE_BUILTIN_CTZ)
check_cxx_source_compiles("
__attribute__((always_inline)) int zero() { return 0; }
int main() {
return zero();
}" HAVE_ATTRIBUTE_ALWAYS_INLINE)
check_cxx_source_compiles("
#include <tmmintrin.h>
int main() {
const __m128i *src = 0;
__m128i dest;
const __m128i shuffle_mask = _mm_load_si128(src);
const __m128i pattern = _mm_shuffle_epi8(_mm_loadl_epi64(src), shuffle_mask);
_mm_storeu_si128(&dest, pattern);
return 0;
}" SNAPPY_HAVE_SSSE3)
check_cxx_source_compiles("
#include <immintrin.h>
int main() {
return _bzhi_u32(0, 1);
}" SNAPPY_HAVE_BMI2)
include(CheckSymbolExists)
check_symbol_exists("mmap" "sys/mman.h" HAVE_FUNC_MMAP)
check_symbol_exists("sysconf" "unistd.h" HAVE_FUNC_SYSCONF)
find_package(Gflags QUIET)
if(GFLAGS_FOUND OR GFLAGS_TARGET)
set(HAVE_GFLAGS 1)
endif(GFLAGS_FOUND OR GFLAGS_TARGET)
configure_file(
"cmake/config.h.in"
"${PROJECT_BINARY_DIR}/config.h"
)
# We don't want to define HAVE_ macros in public headers. Instead, we use
# CMake's variable substitution with 0/1 variables, which will be seen by the
# preprocessor as constants.
set(HAVE_SYS_UIO_H_01 ${HAVE_SYS_UIO_H})
if(NOT HAVE_SYS_UIO_H_01)
set(HAVE_SYS_UIO_H_01 0)
endif(NOT HAVE_SYS_UIO_H_01)
if (SNAPPY_FUZZING_BUILD)
if (NOT "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
message(WARNING "Fuzzing builds are only supported with Clang")
endif (NOT "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
if(NOT CMAKE_CXX_FLAGS MATCHES "-fsanitize=address")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")
endif(NOT CMAKE_CXX_FLAGS MATCHES "-fsanitize=address")
if(NOT CMAKE_CXX_FLAGS MATCHES "-fsanitize=fuzzer-no-link")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=fuzzer-no-link")
endif(NOT CMAKE_CXX_FLAGS MATCHES "-fsanitize=fuzzer-no-link")
endif (SNAPPY_FUZZING_BUILD)
configure_file(
"snappy-stubs-public.h.in"
"${PROJECT_BINARY_DIR}/snappy-stubs-public.h")
add_library(snappy "")
target_sources(snappy
PRIVATE
"snappy-internal.h"
"snappy-stubs-internal.h"
"snappy-c.cc"
"snappy-sinksource.cc"
"snappy-stubs-internal.cc"
"snappy.cc"
"${PROJECT_BINARY_DIR}/config.h"
# Only CMake 3.3+ supports PUBLIC sources in targets exported by "install".
$<$<VERSION_GREATER:CMAKE_VERSION,3.2>:PUBLIC>
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/snappy-c.h>
$<INSTALL_INTERFACE:include/snappy-c.h>
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/snappy-sinksource.h>
$<INSTALL_INTERFACE:include/snappy-sinksource.h>
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/snappy.h>
$<INSTALL_INTERFACE:include/snappy.h>
$<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/snappy-stubs-public.h>
$<INSTALL_INTERFACE:include/snappy-stubs-public.h>
)
target_include_directories(snappy
PUBLIC
$<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>
$<INSTALL_INTERFACE:include>
)
set_target_properties(snappy
PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${PROJECT_VERSION_MAJOR})
target_compile_definitions(snappy PRIVATE -DHAVE_CONFIG_H)
if(BUILD_SHARED_LIBS)
set_target_properties(snappy PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON)
endif(BUILD_SHARED_LIBS)
if(SNAPPY_BUILD_TESTS)
enable_testing()
# Prevent overriding the parent project's compiler/linker settings on Windows.
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
set(install_gtest OFF)
set(install_gmock OFF)
set(build_gmock ON)
# This project is tested using GoogleTest.
add_subdirectory("third_party/googletest")
# This project uses Google benchmark for benchmarking.
set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
set(BENCHMARK_ENABLE_EXCEPTIONS OFF CACHE BOOL "" FORCE)
add_subdirectory("third_party/benchmark")
# GoogleTest triggers a missing field initializers warning.
if(SNAPPY_HAVE_NO_MISSING_FIELD_INITIALIZERS)
set_property(TARGET gtest
APPEND PROPERTY COMPILE_OPTIONS -Wno-missing-field-initializers)
set_property(TARGET gmock
APPEND PROPERTY COMPILE_OPTIONS -Wno-missing-field-initializers)
endif(SNAPPY_HAVE_NO_MISSING_FIELD_INITIALIZERS)
add_executable(snappy_unittest "")
target_sources(snappy_unittest
PRIVATE
"snappy_unittest.cc"
"snappy-test.cc"
)
target_compile_definitions(snappy_unittest PRIVATE -DHAVE_CONFIG_H)
target_link_libraries(snappy_unittest
snappy ${GFLAGS_LIBRARIES} gmock gtest benchmark)
if(HAVE_LIBZ)
target_link_libraries(snappy_unittest z)
endif(HAVE_LIBZ)
if(HAVE_LIBLZO2)
target_link_libraries(snappy_unittest lzo2)
endif(HAVE_LIBLZO2)
if(HAVE_LIBLZ4)
target_link_libraries(snappy_unittest lz4)
endif(HAVE_LIBLZ4)
target_include_directories(snappy_unittest
BEFORE PRIVATE
"${PROJECT_SOURCE_DIR}"
"${GFLAGS_INCLUDE_DIRS}"
)
add_test(
NAME snappy_unittest
WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
COMMAND "${PROJECT_BINARY_DIR}/snappy_unittest")
endif(SNAPPY_BUILD_TESTS)
if(SNAPPY_FUZZING_BUILD)
add_executable(snappy_compress_fuzzer "")
target_sources(snappy_compress_fuzzer
PRIVATE "snappy_compress_fuzzer.cc"
)
target_link_libraries(snappy_compress_fuzzer snappy)
set_target_properties(snappy_compress_fuzzer
PROPERTIES LINK_FLAGS "-fsanitize=fuzzer"
)
add_executable(snappy_uncompress_fuzzer "")
target_sources(snappy_uncompress_fuzzer
PRIVATE "snappy_uncompress_fuzzer.cc"
)
target_link_libraries(snappy_uncompress_fuzzer snappy)
set_target_properties(snappy_uncompress_fuzzer
PROPERTIES LINK_FLAGS "-fsanitize=fuzzer"
)
endif(SNAPPY_FUZZING_BUILD)
# Must be included before CMAKE_INSTALL_INCLUDEDIR is used.
include(GNUInstallDirs)
if(SNAPPY_INSTALL)
install(TARGETS snappy
EXPORT SnappyTargets
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
)
install(
FILES
"snappy-c.h"
"snappy-sinksource.h"
"snappy.h"
"${PROJECT_BINARY_DIR}/snappy-stubs-public.h"
DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
)
include(CMakePackageConfigHelpers)
configure_package_config_file(
"cmake/${PROJECT_NAME}Config.cmake.in"
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}Config.cmake"
INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
)
write_basic_package_version_file(
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}ConfigVersion.cmake"
COMPATIBILITY SameMajorVersion
)
install(
EXPORT SnappyTargets
NAMESPACE Snappy::
DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
)
install(
FILES
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}Config.cmake"
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}ConfigVersion.cmake"
DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
)
endif(SNAPPY_INSTALL)
# Copyright 2019 Google Inc. All Rights Reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
cmake_minimum_required(VERSION 3.1)
project(Snappy VERSION 1.1.8 LANGUAGES C CXX)
# C++ standard can be overridden when this is used as a sub-project.
if(NOT CMAKE_CXX_STANDARD)
# This project requires C++11.
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
endif(NOT CMAKE_CXX_STANDARD)
# https://github.com/izenecloud/cmake/blob/master/SetCompilerWarningAll.cmake
if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# Use the highest warning level for Visual Studio.
set(CMAKE_CXX_WARNING_LEVEL 4)
if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
else(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
endif(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
# Disable C++ exceptions.
string(REGEX REPLACE "/EH[a-z]+" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHs-c-")
add_definitions(-D_HAS_EXCEPTIONS=0)
# Disable RTTI.
string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# Use -Wall for clang and gcc.
if(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
endif(NOT CMAKE_CXX_FLAGS MATCHES "-Wall")
# Use -Wextra for clang and gcc.
if(NOT CMAKE_CXX_FLAGS MATCHES "-Wextra")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wextra")
endif(NOT CMAKE_CXX_FLAGS MATCHES "-Wextra")
# Use -Werror for clang only.
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
if(NOT CMAKE_CXX_FLAGS MATCHES "-Werror")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
endif(NOT CMAKE_CXX_FLAGS MATCHES "-Werror")
endif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
# Disable C++ exceptions.
string(REGEX REPLACE "-fexceptions" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
# Disable RTTI.
string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make
# it prominent in the GUI.
option(BUILD_SHARED_LIBS "Build shared libraries(DLLs)." OFF)
option(SNAPPY_BUILD_TESTS "Build Snappy's own tests." ON)
option(SNAPPY_BUILD_BENCHMARKS "Build Snappy's benchmarks" ON)
option(SNAPPY_FUZZING_BUILD "Build Snappy for fuzzing." OFF)
option(SNAPPY_REQUIRE_AVX "Target processors with AVX support." OFF)
option(SNAPPY_REQUIRE_AVX2 "Target processors with AVX2 support." OFF)
option(SNAPPY_INSTALL "Install Snappy's header and library" ON)
include(TestBigEndian)
test_big_endian(SNAPPY_IS_BIG_ENDIAN)
include(CheckIncludeFile)
check_include_file("sys/mman.h" HAVE_SYS_MMAN_H)
check_include_file("sys/resource.h" HAVE_SYS_RESOURCE_H)
check_include_file("sys/time.h" HAVE_SYS_TIME_H)
check_include_file("sys/uio.h" HAVE_SYS_UIO_H)
check_include_file("unistd.h" HAVE_UNISTD_H)
check_include_file("windows.h" HAVE_WINDOWS_H)
include(CheckLibraryExists)
check_library_exists(z zlibVersion "" HAVE_LIBZ)
check_library_exists(lzo2 lzo1x_1_15_compress "" HAVE_LIBLZO2)
check_library_exists(lz4 LZ4_compress_default "" HAVE_LIBLZ4)
include(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG("/arch:AVX" HAVE_VISUAL_STUDIO_ARCH_AVX)
CHECK_CXX_COMPILER_FLAG("/arch:AVX2" HAVE_VISUAL_STUDIO_ARCH_AVX2)
CHECK_CXX_COMPILER_FLAG("-mavx" HAVE_CLANG_MAVX)
CHECK_CXX_COMPILER_FLAG("-mbmi2" HAVE_CLANG_MBMI2)
if(SNAPPY_REQUIRE_AVX2)
if(HAVE_VISUAL_STUDIO_ARCH_AVX2)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /arch:AVX2")
endif(HAVE_VISUAL_STUDIO_ARCH_AVX2)
if(HAVE_CLANG_MAVX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx")
endif(HAVE_CLANG_MAVX)
if(HAVE_CLANG_MBMI2)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mbmi2")
endif(HAVE_CLANG_MBMI2)
elseif (SNAPPY_REQUIRE_AVX)
if(HAVE_VISUAL_STUDIO_ARCH_AVX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /arch:AVX")
endif(HAVE_VISUAL_STUDIO_ARCH_AVX)
if(HAVE_CLANG_MAVX)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx")
endif(HAVE_CLANG_MAVX)
endif(SNAPPY_REQUIRE_AVX2)
# Used by googletest.
check_cxx_compiler_flag(-Wno-missing-field-initializers
SNAPPY_HAVE_NO_MISSING_FIELD_INITIALIZERS)
include(CheckCXXSourceCompiles)
check_cxx_source_compiles("
int main() {
return __builtin_expect(0, 1);
}" HAVE_BUILTIN_EXPECT)
check_cxx_source_compiles("
int main() {
return __builtin_ctzll(0);
}" HAVE_BUILTIN_CTZ)
check_cxx_source_compiles("
__attribute__((always_inline)) int zero() { return 0; }
int main() {
return zero();
}" HAVE_ATTRIBUTE_ALWAYS_INLINE)
check_cxx_source_compiles("
#include <tmmintrin.h>
int main() {
const __m128i *src = 0;
__m128i dest;
const __m128i shuffle_mask = _mm_load_si128(src);
const __m128i pattern = _mm_shuffle_epi8(_mm_loadl_epi64(src), shuffle_mask);
_mm_storeu_si128(&dest, pattern);
return 0;
}" SNAPPY_HAVE_SSSE3)
check_cxx_source_compiles("
#include <immintrin.h>
int main() {
return _bzhi_u32(0, 1);
}" SNAPPY_HAVE_BMI2)
include(CheckSymbolExists)
check_symbol_exists("mmap" "sys/mman.h" HAVE_FUNC_MMAP)
check_symbol_exists("sysconf" "unistd.h" HAVE_FUNC_SYSCONF)
find_package(Gflags QUIET)
if(GFLAGS_FOUND OR GFLAGS_TARGET)
set(HAVE_GFLAGS 1)
endif(GFLAGS_FOUND OR GFLAGS_TARGET)
configure_file(
"cmake/config.h.in"
"${PROJECT_BINARY_DIR}/config.h"
)
# We don't want to define HAVE_ macros in public headers. Instead, we use
# CMake's variable substitution with 0/1 variables, which will be seen by the
# preprocessor as constants.
set(HAVE_SYS_UIO_H_01 ${HAVE_SYS_UIO_H})
if(NOT HAVE_SYS_UIO_H_01)
set(HAVE_SYS_UIO_H_01 0)
endif(NOT HAVE_SYS_UIO_H_01)
if (SNAPPY_FUZZING_BUILD)
if (NOT "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
message(WARNING "Fuzzing builds are only supported with Clang")
endif (NOT "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
if(NOT CMAKE_CXX_FLAGS MATCHES "-fsanitize=address")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=address")
endif(NOT CMAKE_CXX_FLAGS MATCHES "-fsanitize=address")
if(NOT CMAKE_CXX_FLAGS MATCHES "-fsanitize=fuzzer-no-link")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=fuzzer-no-link")
endif(NOT CMAKE_CXX_FLAGS MATCHES "-fsanitize=fuzzer-no-link")
endif (SNAPPY_FUZZING_BUILD)
configure_file(
"snappy-stubs-public.h.in"
"${PROJECT_BINARY_DIR}/snappy-stubs-public.h")
add_library(snappy "")
target_sources(snappy
PRIVATE
"snappy-internal.h"
"snappy-stubs-internal.h"
"snappy-c.cc"
"snappy-sinksource.cc"
"snappy-stubs-internal.cc"
"snappy.cc"
"${PROJECT_BINARY_DIR}/config.h"
# Only CMake 3.3+ supports PUBLIC sources in targets exported by "install".
$<$<VERSION_GREATER:CMAKE_VERSION,3.2>:PUBLIC>
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/snappy-c.h>
$<INSTALL_INTERFACE:include/snappy-c.h>
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/snappy-sinksource.h>
$<INSTALL_INTERFACE:include/snappy-sinksource.h>
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/snappy.h>
$<INSTALL_INTERFACE:include/snappy.h>
$<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/snappy-stubs-public.h>
$<INSTALL_INTERFACE:include/snappy-stubs-public.h>
)
target_include_directories(snappy
PUBLIC
$<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>
$<INSTALL_INTERFACE:include>
)
set_target_properties(snappy
PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${PROJECT_VERSION_MAJOR})
target_compile_definitions(snappy PRIVATE -DHAVE_CONFIG_H)
if(BUILD_SHARED_LIBS)
set_target_properties(snappy PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON)
endif(BUILD_SHARED_LIBS)
if(SNAPPY_BUILD_TESTS OR SNAPPY_BUILD_BENCHMARKS)
add_library(snappy_test_support "")
target_sources(snappy_test_support
PRIVATE
"snappy-test.cc"
"snappy-test.h"
"snappy_test_data.cc"
"snappy_test_data.h"
"${PROJECT_BINARY_DIR}/config.h"
)
# Test files include snappy-test.h, HAVE_CONFIG_H must be defined.
target_compile_definitions(snappy_test_support PUBLIC -DHAVE_CONFIG_H)
target_link_libraries(snappy_test_support snappy ${GFLAGS_LIBRARIES})
if(HAVE_LIBZ)
target_link_libraries(snappy_test_support z)
endif(HAVE_LIBZ)
if(HAVE_LIBLZO2)
target_link_libraries(snappy_test_support lzo2)
endif(HAVE_LIBLZO2)
if(HAVE_LIBLZ4)
target_link_libraries(snappy_test_support lz4)
endif(HAVE_LIBLZ4)
target_include_directories(snappy_test_support
BEFORE PUBLIC
"${PROJECT_SOURCE_DIR}"
"${GFLAGS_INCLUDE_DIRS}"
)
endif(SNAPPY_BUILD_TESTS OR SNAPPY_BUILD_BENCHMARKS)
if(SNAPPY_BUILD_TESTS)
enable_testing()
# Prevent overriding the parent project's compiler/linker settings on Windows.
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
set(install_gtest OFF)
set(install_gmock OFF)
set(build_gmock ON)
# This project is tested using GoogleTest.
add_subdirectory("third_party/googletest")
# GoogleTest triggers a missing field initializers warning.
if(SNAPPY_HAVE_NO_MISSING_FIELD_INITIALIZERS)
set_property(TARGET gtest
APPEND PROPERTY COMPILE_OPTIONS -Wno-missing-field-initializers)
set_property(TARGET gmock
APPEND PROPERTY COMPILE_OPTIONS -Wno-missing-field-initializers)
endif(SNAPPY_HAVE_NO_MISSING_FIELD_INITIALIZERS)
add_executable(snappy_unittest "")
target_sources(snappy_unittest
PRIVATE
"snappy_unittest.cc"
)
target_link_libraries(snappy_unittest snappy_test_support gmock_main gtest)
add_test(
NAME snappy_unittest
WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
COMMAND "${PROJECT_BINARY_DIR}/snappy_unittest")
add_executable(snappy_test_tool "")
target_sources(snappy_test_tool
PRIVATE
"snappy_test_tool.cc"
)
target_link_libraries(snappy_test_tool snappy_test_support)
endif(SNAPPY_BUILD_TESTS)
if(SNAPPY_BUILD_BENCHMARKS)
add_executable(snappy_benchmark "")
target_sources(snappy_benchmark
PRIVATE
"snappy_benchmark.cc"
)
target_link_libraries(snappy_benchmark snappy_test_support benchmark_main)
# This project uses Google benchmark for benchmarking.
set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
set(BENCHMARK_ENABLE_EXCEPTIONS OFF CACHE BOOL "" FORCE)
add_subdirectory("third_party/benchmark")
endif(SNAPPY_BUILD_BENCHMARKS)
if(SNAPPY_FUZZING_BUILD)
add_executable(snappy_compress_fuzzer "")
target_sources(snappy_compress_fuzzer
PRIVATE "snappy_compress_fuzzer.cc"
)
target_link_libraries(snappy_compress_fuzzer snappy)
set_target_properties(snappy_compress_fuzzer
PROPERTIES LINK_FLAGS "-fsanitize=fuzzer"
)
add_executable(snappy_uncompress_fuzzer "")
target_sources(snappy_uncompress_fuzzer
PRIVATE "snappy_uncompress_fuzzer.cc"
)
target_link_libraries(snappy_uncompress_fuzzer snappy)
set_target_properties(snappy_uncompress_fuzzer
PROPERTIES LINK_FLAGS "-fsanitize=fuzzer"
)
endif(SNAPPY_FUZZING_BUILD)
# Must be included before CMAKE_INSTALL_INCLUDEDIR is used.
include(GNUInstallDirs)
if(SNAPPY_INSTALL)
install(TARGETS snappy
EXPORT SnappyTargets
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
)
install(
FILES
"snappy-c.h"
"snappy-sinksource.h"
"snappy.h"
"${PROJECT_BINARY_DIR}/snappy-stubs-public.h"
DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
)
include(CMakePackageConfigHelpers)
configure_package_config_file(
"cmake/${PROJECT_NAME}Config.cmake.in"
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}Config.cmake"
INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
)
write_basic_package_version_file(
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}ConfigVersion.cmake"
COMPATIBILITY SameMajorVersion
)
install(
EXPORT SnappyTargets
NAMESPACE Snappy::
DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
)
install(
FILES
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}Config.cmake"
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}ConfigVersion.cmake"
DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
)
endif(SNAPPY_INSTALL)

42
README.md
View file

@ -109,35 +109,33 @@ information.
Tests and benchmarks
====================
When you compile Snappy, snappy_unittest is compiled in addition to the
library itself. You do not need it to use the compressor from your own library,
but it contains several useful components for Snappy development.
When you compile Snappy, the following binaries are compiled in addition to the
library itself. You do not need them to use the compressor from your own
library, but they are useful for Snappy development.
First of all, it contains unit tests, verifying correctness on your machine in
various scenarios. If you want to change or optimize Snappy, please run the
tests to verify you have not broken anything.
* `snappy_benchmark` contains microbenchmarks used to tune compression and
decompression performance.
* `snappy_unittests` contains unit tests, verifying correctness on your machine
in various scenarios.
* `snappy_test_tool` can benchmark Snappy against a few other compression
libraries (zlib, LZO, LZF, and QuickLZ), if they were detected at configure
time. To benchmark using a given file, give the compression algorithm you want
to test Snappy against (e.g. --zlib) and then a list of one or more file names
on the command line.
If you want to change or optimize Snappy, please run the tests and benchmarks to
verify you have not broken anything.
The testdata/ directory contains the files used by the microbenchmarks, which
should provide a reasonably balanced starting point for benchmarking. (Note that
baddata[1-3].snappy are not intended as benchmarks; they are used to verify
correctness in the presence of corrupted data in the unit test.)
The gflags library for handling of command-line flags is used if it's installed.
You can find it at
https://gflags.github.io/gflags/
In addition to the unit tests, snappy contains microbenchmarks used to
tune compression and decompression performance. These are automatically run
before the unit tests, but you can disable them using the flag
--run_microbenchmarks=false if you have gflags installed (otherwise you will
need to edit the source).
Finally, snappy can benchmark Snappy against a few other compression libraries
(zlib, LZO, LZF, and QuickLZ), if they were detected at configure time.
To benchmark using a given file, give the compression algorithm you want to test
Snappy against (e.g. --zlib) and then a list of one or more file names on the
command line. The testdata/ directory contains the files used by the
microbenchmark, which should provide a reasonably balanced starting point for
benchmarking. (Note that baddata[1-3].snappy are not intended as benchmarks; they
are used to verify correctness in the presence of corrupted data in the unit
test.)
Contact
=======

3
cmake/config.h.in
View file

@ -19,9 +19,6 @@
/* Define to 1 to use the gflags package for command-line parsing. */
#cmakedefine HAVE_GFLAGS 1
/* Define to 1 if you have Google Test. */
#cmakedefine HAVE_GTEST 1
/* Define to 1 if you have the `lzo2' library (-llzo2). */
#cmakedefine HAVE_LIBLZO2 1

329
snappy_benchmark.cc Normal file
View file

@ -0,0 +1,329 @@
// Copyright 2020 Google Inc. All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <cstddef>
#include <cstdint>
#include <string>
#include <vector>
#include "benchmark/benchmark.h"
#include "gtest/gtest.h"
#include "snappy-internal.h"
#include "snappy-sinksource.h"
#include "snappy-test.h"
#include "snappy.h"
#include "snappy_test_data.h"
namespace snappy {
namespace {
void BM_UFlat(benchmark::State& state) {
// Pick file to process based on state.range(0).
int file_index = state.range(0);
CHECK_GE(file_index, 0);
CHECK_LT(file_index, ARRAYSIZE(kTestDataFiles));
std::string contents =
ReadTestDataFile(kTestDataFiles[file_index].filename,
kTestDataFiles[file_index].size_limit);
std::string zcontents;
snappy::Compress(contents.data(), contents.size(), &zcontents);
char* dst = new char[contents.size()];
for (auto s : state) {
CHECK(snappy::RawUncompress(zcontents.data(), zcontents.size(), dst));
benchmark::DoNotOptimize(dst);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
static_cast<int64_t>(contents.size()));
state.SetLabel(kTestDataFiles[file_index].label);
delete[] dst;
}
BENCHMARK(BM_UFlat)->DenseRange(0, ARRAYSIZE(kTestDataFiles) - 1);
struct SourceFiles {
SourceFiles() {
for (int i = 0; i < kFiles; i++) {
std::string contents = ReadTestDataFile(kTestDataFiles[i].filename,
kTestDataFiles[i].size_limit);
max_size = std::max(max_size, contents.size());
sizes[i] = contents.size();
snappy::Compress(contents.data(), contents.size(), &zcontents[i]);
}
}
static constexpr int kFiles = ARRAYSIZE(kTestDataFiles);
std::string zcontents[kFiles];
size_t sizes[kFiles];
size_t max_size = 0;
};
void BM_UFlatMedley(benchmark::State& state) {
static const SourceFiles* const source = new SourceFiles();
std::vector<char> dst(source->max_size);
for (auto s : state) {
for (int i = 0; i < SourceFiles::kFiles; i++) {
CHECK(snappy::RawUncompress(source->zcontents[i].data(),
source->zcontents[i].size(), dst.data()));
benchmark::DoNotOptimize(dst);
}
}
int64_t source_sizes = 0;
for (int i = 0; i < SourceFiles::kFiles; i++) {
source_sizes += static_cast<int64_t>(source->sizes[i]);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
source_sizes);
}
BENCHMARK(BM_UFlatMedley);
void BM_UValidate(benchmark::State& state) {
// Pick file to process based on state.range(0).
int file_index = state.range(0);
CHECK_GE(file_index, 0);
CHECK_LT(file_index, ARRAYSIZE(kTestDataFiles));
std::string contents =
ReadTestDataFile(kTestDataFiles[file_index].filename,
kTestDataFiles[file_index].size_limit);
std::string zcontents;
snappy::Compress(contents.data(), contents.size(), &zcontents);
for (auto s : state) {
CHECK(snappy::IsValidCompressedBuffer(zcontents.data(), zcontents.size()));
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
static_cast<int64_t>(contents.size()));
state.SetLabel(kTestDataFiles[file_index].label);
}
BENCHMARK(BM_UValidate)->DenseRange(0, ARRAYSIZE(kTestDataFiles) - 1);
void BM_UValidateMedley(benchmark::State& state) {
static const SourceFiles* const source = new SourceFiles();
for (auto s : state) {
for (int i = 0; i < SourceFiles::kFiles; i++) {
CHECK(snappy::IsValidCompressedBuffer(source->zcontents[i].data(),
source->zcontents[i].size()));
}
}
int64_t source_sizes = 0;
for (int i = 0; i < SourceFiles::kFiles; i++) {
source_sizes += static_cast<int64_t>(source->sizes[i]);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
source_sizes);
}
BENCHMARK(BM_UValidateMedley);
void BM_UIOVec(benchmark::State& state) {
// Pick file to process based on state.range(0).
int file_index = state.range(0);
CHECK_GE(file_index, 0);
CHECK_LT(file_index, ARRAYSIZE(kTestDataFiles));
std::string contents =
ReadTestDataFile(kTestDataFiles[file_index].filename,
kTestDataFiles[file_index].size_limit);
std::string zcontents;
snappy::Compress(contents.data(), contents.size(), &zcontents);
// Uncompress into an iovec containing ten entries.
const int kNumEntries = 10;
struct iovec iov[kNumEntries];
char *dst = new char[contents.size()];
size_t used_so_far = 0;
for (int i = 0; i < kNumEntries; ++i) {
iov[i].iov_base = dst + used_so_far;
if (used_so_far == contents.size()) {
iov[i].iov_len = 0;
continue;
}
if (i == kNumEntries - 1) {
iov[i].iov_len = contents.size() - used_so_far;
} else {
iov[i].iov_len = contents.size() / kNumEntries;
}
used_so_far += iov[i].iov_len;
}
for (auto s : state) {
CHECK(snappy::RawUncompressToIOVec(zcontents.data(), zcontents.size(), iov,
kNumEntries));
benchmark::DoNotOptimize(iov);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
static_cast<int64_t>(contents.size()));
state.SetLabel(kTestDataFiles[file_index].label);
delete[] dst;
}
BENCHMARK(BM_UIOVec)->DenseRange(0, 4);
void BM_UFlatSink(benchmark::State& state) {
// Pick file to process based on state.range(0).
int file_index = state.range(0);
CHECK_GE(file_index, 0);
CHECK_LT(file_index, ARRAYSIZE(kTestDataFiles));
std::string contents =
ReadTestDataFile(kTestDataFiles[file_index].filename,
kTestDataFiles[file_index].size_limit);
std::string zcontents;
snappy::Compress(contents.data(), contents.size(), &zcontents);
char* dst = new char[contents.size()];
for (auto s : state) {
snappy::ByteArraySource source(zcontents.data(), zcontents.size());
snappy::UncheckedByteArraySink sink(dst);
CHECK(snappy::Uncompress(&source, &sink));
benchmark::DoNotOptimize(sink);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
static_cast<int64_t>(contents.size()));
state.SetLabel(kTestDataFiles[file_index].label);
std::string s(dst, contents.size());
CHECK_EQ(contents, s);
delete[] dst;
}
BENCHMARK(BM_UFlatSink)->DenseRange(0, ARRAYSIZE(kTestDataFiles) - 1);
void BM_ZFlat(benchmark::State& state) {
// Pick file to process based on state.range(0).
int file_index = state.range(0);
CHECK_GE(file_index, 0);
CHECK_LT(file_index, ARRAYSIZE(kTestDataFiles));
std::string contents =
ReadTestDataFile(kTestDataFiles[file_index].filename,
kTestDataFiles[file_index].size_limit);
char* dst = new char[snappy::MaxCompressedLength(contents.size())];
size_t zsize = 0;
for (auto s : state) {
snappy::RawCompress(contents.data(), contents.size(), dst, &zsize);
benchmark::DoNotOptimize(dst);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
static_cast<int64_t>(contents.size()));
const double compression_ratio =
static_cast<double>(zsize) / std::max<size_t>(1, contents.size());
state.SetLabel(StrFormat("%s (%.2f %%)", kTestDataFiles[file_index].label,
100.0 * compression_ratio));
VLOG(0) << StrFormat("compression for %s: %d -> %d bytes",
kTestDataFiles[file_index].label, contents.size(),
zsize);
delete[] dst;
}
BENCHMARK(BM_ZFlat)->DenseRange(0, ARRAYSIZE(kTestDataFiles) - 1);
void BM_ZFlatAll(benchmark::State& state) {
const int num_files = ARRAYSIZE(kTestDataFiles);
std::vector<std::string> contents(num_files);
std::vector<char*> dst(num_files);
int64_t total_contents_size = 0;
for (int i = 0; i < num_files; ++i) {
contents[i] = ReadTestDataFile(kTestDataFiles[i].filename,
kTestDataFiles[i].size_limit);
dst[i] = new char[snappy::MaxCompressedLength(contents[i].size())];
total_contents_size += contents[i].size();
}
size_t zsize = 0;
for (auto s : state) {
for (int i = 0; i < num_files; ++i) {
snappy::RawCompress(contents[i].data(), contents[i].size(), dst[i],
&zsize);
benchmark::DoNotOptimize(dst);
}
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
total_contents_size);
for (char* dst_item : dst) {
delete[] dst_item;
}
state.SetLabel(StrFormat("%d kTestDataFiles", num_files));
}
BENCHMARK(BM_ZFlatAll);
void BM_ZFlatIncreasingTableSize(benchmark::State& state) {
CHECK_GT(ARRAYSIZE(kTestDataFiles), 0);
const std::string base_content = ReadTestDataFile(
kTestDataFiles[0].filename, kTestDataFiles[0].size_limit);
std::vector<std::string> contents;
std::vector<char*> dst;
int64_t total_contents_size = 0;
for (int table_bits = kMinHashTableBits; table_bits <= kMaxHashTableBits;
++table_bits) {
std::string content = base_content;
content.resize(1 << table_bits);
dst.push_back(new char[snappy::MaxCompressedLength(content.size())]);
total_contents_size += content.size();
contents.push_back(std::move(content));
}
size_t zsize = 0;
for (auto s : state) {
for (size_t i = 0; i < contents.size(); ++i) {
snappy::RawCompress(contents[i].data(), contents[i].size(), dst[i],
&zsize);
benchmark::DoNotOptimize(dst);
}
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
total_contents_size);
for (char* dst_item : dst) {
delete[] dst_item;
}
state.SetLabel(StrFormat("%d tables", contents.size()));
}
BENCHMARK(BM_ZFlatIncreasingTableSize);
} // namespace
} // namespace snappy

57
snappy_test_data.cc Normal file
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@ -0,0 +1,57 @@
// Copyright 2020 Google Inc. All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Support code for reading test data.
#include "snappy_test_data.h"
#include <cstddef>
#include <cstdlib>
#include <string>
#include "snappy-test.h"
namespace snappy {
std::string ReadTestDataFile(const char* base, size_t size_limit) {
std::string srcdir;
const char* srcdir_env = std::getenv("srcdir"); // This is set by Automake.
if (srcdir_env) {
srcdir = std::string(srcdir_env) + "/";
}
std::string contents;
CHECK_OK(file::GetContents(srcdir + "testdata/" + base, &contents,
file::Defaults()));
if (size_limit > 0) {
contents = contents.substr(0, size_limit);
}
return contents;
}
} // namespace snappy

68
snappy_test_data.h Normal file
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@ -0,0 +1,68 @@
// Copyright 2020 Google Inc. All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// List of test case files.
#ifndef THIRD_PARTY_SNAPPY_SNAPPY_TEST_DATA_H__
#define THIRD_PARTY_SNAPPY_SNAPPY_TEST_DATA_H__
#include <cstddef>
#include <string>
namespace snappy {
std::string ReadTestDataFile(const char* base, size_t size_limit);
// TODO: Replace anonymous namespace with inline variable when we can
// rely on C++17.
namespace {
constexpr struct {
const char* label;
const char* filename;
size_t size_limit;
} kTestDataFiles[] = {
{ "html", "html", 0 },
{ "urls", "urls.10K", 0 },
{ "jpg", "fireworks.jpeg", 0 },
{ "jpg_200", "fireworks.jpeg", 200 },
{ "pdf", "paper-100k.pdf", 0 },
{ "html4", "html_x_4", 0 },
{ "txt1", "alice29.txt", 0 },
{ "txt2", "asyoulik.txt", 0 },
{ "txt3", "lcet10.txt", 0 },
{ "txt4", "plrabn12.txt", 0 },
{ "pb", "geo.protodata", 0 },
{ "gaviota", "kppkn.gtb", 0 },
};
} // namespace
} // namespace snappy
#endif // THIRD_PARTY_SNAPPY_SNAPPY_TEST_DATA_H__

461
snappy_test_tool.cc Normal file
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@ -0,0 +1,461 @@
// Copyright 2020 Google Inc. All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <random>
#include <string>
#include <utility>
#include <vector>
#include "snappy-test.h"
#include "snappy-internal.h"
#include "snappy-sinksource.h"
#include "snappy.h"
#include "snappy_test_data.h"
DEFINE_int32(start_len, -1,
"Starting prefix size for testing (-1: just full file contents)");
DEFINE_int32(end_len, -1,
"Starting prefix size for testing (-1: just full file contents)");
DEFINE_int32(bytes, 10485760,
"How many bytes to compress/uncompress per file for timing");
DEFINE_bool(zlib, true,
"Run zlib compression (http://www.zlib.net)");
DEFINE_bool(lzo, true,
"Run LZO compression (http://www.oberhumer.com/opensource/lzo/)");
DEFINE_bool(lz4, true, "Run LZ4 compression (https://github.com/lz4/lz4)");
DEFINE_bool(snappy, true, "Run snappy compression");
DEFINE_bool(write_compressed, false,
"Write compressed versions of each file to <file>.comp");
DEFINE_bool(write_uncompressed, false,
"Write uncompressed versions of each file to <file>.uncomp");
namespace snappy {
namespace {
#if defined(HAVE_FUNC_MMAP) && defined(HAVE_FUNC_SYSCONF)
// To test against code that reads beyond its input, this class copies a
// string to a newly allocated group of pages, the last of which
// is made unreadable via mprotect. Note that we need to allocate the
// memory with mmap(), as POSIX allows mprotect() only on memory allocated
// with mmap(), and some malloc/posix_memalign implementations expect to
// be able to read previously allocated memory while doing heap allocations.
class DataEndingAtUnreadablePage {
public:
explicit DataEndingAtUnreadablePage(const std::string& s) {
const size_t page_size = sysconf(_SC_PAGESIZE);
const size_t size = s.size();
// Round up space for string to a multiple of page_size.
size_t space_for_string = (size + page_size - 1) & ~(page_size - 1);
alloc_size_ = space_for_string + page_size;
mem_ = mmap(NULL, alloc_size_,
PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
CHECK_NE(MAP_FAILED, mem_);
protected_page_ = reinterpret_cast<char*>(mem_) + space_for_string;
char* dst = protected_page_ - size;
std::memcpy(dst, s.data(), size);
data_ = dst;
size_ = size;
// Make guard page unreadable.
CHECK_EQ(0, mprotect(protected_page_, page_size, PROT_NONE));
}
~DataEndingAtUnreadablePage() {
const size_t page_size = sysconf(_SC_PAGESIZE);
// Undo the mprotect.
CHECK_EQ(0, mprotect(protected_page_, page_size, PROT_READ|PROT_WRITE));
CHECK_EQ(0, munmap(mem_, alloc_size_));
}
const char* data() const { return data_; }
size_t size() const { return size_; }
private:
size_t alloc_size_;
void* mem_;
char* protected_page_;
const char* data_;
size_t size_;
};
#else // defined(HAVE_FUNC_MMAP) && defined(HAVE_FUNC_SYSCONF)
// Fallback for systems without mmap.
using DataEndingAtUnreadablePage = std::string;
#endif
enum CompressorType { ZLIB, LZO, LZ4, SNAPPY };
const char* names[] = {"ZLIB", "LZO", "LZ4", "SNAPPY"};
size_t MinimumRequiredOutputSpace(size_t input_size, CompressorType comp) {
switch (comp) {
#ifdef ZLIB_VERSION
case ZLIB:
return ZLib::MinCompressbufSize(input_size);
#endif // ZLIB_VERSION
#ifdef LZO_VERSION
case LZO:
return input_size + input_size/64 + 16 + 3;
#endif // LZO_VERSION
#ifdef LZ4_VERSION_NUMBER
case LZ4:
return LZ4_compressBound(input_size);
#endif // LZ4_VERSION_NUMBER
case SNAPPY:
return snappy::MaxCompressedLength(input_size);
default:
LOG(FATAL) << "Unknown compression type number " << comp;
return 0;
}
}
// Returns true if we successfully compressed, false otherwise.
//
// If compressed_is_preallocated is set, do not resize the compressed buffer.
// This is typically what you want for a benchmark, in order to not spend
// time in the memory allocator. If you do set this flag, however,
// "compressed" must be preinitialized to at least MinCompressbufSize(comp)
// number of bytes, and may contain junk bytes at the end after return.
bool Compress(const char* input, size_t input_size, CompressorType comp,
std::string* compressed, bool compressed_is_preallocated) {
if (!compressed_is_preallocated) {
compressed->resize(MinimumRequiredOutputSpace(input_size, comp));
}
switch (comp) {
#ifdef ZLIB_VERSION
case ZLIB: {
ZLib zlib;
uLongf destlen = compressed->size();
int ret = zlib.Compress(
reinterpret_cast<Bytef*>(string_as_array(compressed)),
&destlen,
reinterpret_cast<const Bytef*>(input),
input_size);
CHECK_EQ(Z_OK, ret);
if (!compressed_is_preallocated) {
compressed->resize(destlen);
}
return true;
}
#endif // ZLIB_VERSION
#ifdef LZO_VERSION
case LZO: {
unsigned char* mem = new unsigned char[LZO1X_1_15_MEM_COMPRESS];
lzo_uint destlen;
int ret = lzo1x_1_15_compress(
reinterpret_cast<const uint8_t*>(input),
input_size,
reinterpret_cast<uint8_t*>(string_as_array(compressed)),
&destlen,
mem);
CHECK_EQ(LZO_E_OK, ret);
delete[] mem;
if (!compressed_is_preallocated) {
compressed->resize(destlen);
}
break;
}
#endif // LZO_VERSION
#ifdef LZ4_VERSION_NUMBER
case LZ4: {
int destlen = compressed->size();
destlen = LZ4_compress_default(input, string_as_array(compressed),
input_size, destlen);
CHECK(destlen != 0);
if (!compressed_is_preallocated) {
compressed->resize(destlen);
}
break;
}
#endif // LZ4_VERSION_NUMBER
case SNAPPY: {
size_t destlen;
snappy::RawCompress(input, input_size,
string_as_array(compressed),
&destlen);
CHECK_LE(destlen, snappy::MaxCompressedLength(input_size));
if (!compressed_is_preallocated) {
compressed->resize(destlen);
}
break;
}
default: {
return false; // the asked-for library wasn't compiled in
}
}
return true;
}
bool Uncompress(const std::string& compressed, CompressorType comp, int size,
std::string* output) {
switch (comp) {
#ifdef ZLIB_VERSION
case ZLIB: {
output->resize(size);
ZLib zlib;
uLongf destlen = output->size();
int ret = zlib.Uncompress(
reinterpret_cast<Bytef*>(string_as_array(output)),
&destlen,
reinterpret_cast<const Bytef*>(compressed.data()),
compressed.size());
CHECK_EQ(Z_OK, ret);
CHECK_EQ(static_cast<uLongf>(size), destlen);
break;
}
#endif // ZLIB_VERSION
#ifdef LZO_VERSION
case LZO: {
output->resize(size);
lzo_uint destlen;
int ret = lzo1x_decompress(
reinterpret_cast<const uint8_t*>(compressed.data()),
compressed.size(),
reinterpret_cast<uint8_t*>(string_as_array(output)),
&destlen,
NULL);
CHECK_EQ(LZO_E_OK, ret);
CHECK_EQ(static_cast<lzo_uint>(size), destlen);
break;
}
#endif // LZO_VERSION
#ifdef LZ4_VERSION_NUMBER
case LZ4: {
output->resize(size);
int destlen = output->size();
destlen = LZ4_decompress_safe(compressed.data(), string_as_array(output),
compressed.size(), destlen);
CHECK(destlen != 0);
CHECK_EQ(size, destlen);
break;
}
#endif // LZ4_VERSION_NUMBER
case SNAPPY: {
snappy::RawUncompress(compressed.data(), compressed.size(),
string_as_array(output));
break;
}
default: {
return false; // the asked-for library wasn't compiled in
}
}
return true;
}
void Measure(const char* data, size_t length, CompressorType comp, int repeats,
int block_size) {
// Run tests a few time and pick median running times
static const int kRuns = 5;
double ctime[kRuns];
double utime[kRuns];
int compressed_size = 0;
{
// Chop the input into blocks
int num_blocks = (length + block_size - 1) / block_size;
std::vector<const char*> input(num_blocks);
std::vector<size_t> input_length(num_blocks);
std::vector<std::string> compressed(num_blocks);
std::vector<std::string> output(num_blocks);
for (int b = 0; b < num_blocks; ++b) {
int input_start = b * block_size;
int input_limit = std::min<int>((b+1)*block_size, length);
input[b] = data+input_start;
input_length[b] = input_limit-input_start;
}
// Pre-grow the output buffers so we don't measure string append time.
for (std::string& compressed_block : compressed) {
compressed_block.resize(MinimumRequiredOutputSpace(block_size, comp));
}
// First, try one trial compression to make sure the code is compiled in
if (!Compress(input[0], input_length[0], comp, &compressed[0], true)) {
LOG(WARNING) << "Skipping " << names[comp] << ": "
<< "library not compiled in";
return;
}
for (int run = 0; run < kRuns; ++run) {
CycleTimer ctimer, utimer;
// Pre-grow the output buffers so we don't measure string append time.
for (std::string& compressed_block : compressed) {
compressed_block.resize(MinimumRequiredOutputSpace(block_size, comp));
}
ctimer.Start();
for (int b = 0; b < num_blocks; ++b) {
for (int i = 0; i < repeats; ++i)
Compress(input[b], input_length[b], comp, &compressed[b], true);
}
ctimer.Stop();
// Compress once more, with resizing, so we don't leave junk
// at the end that will confuse the decompressor.
for (int b = 0; b < num_blocks; ++b) {
Compress(input[b], input_length[b], comp, &compressed[b], false);
}
for (int b = 0; b < num_blocks; ++b) {
output[b].resize(input_length[b]);
}
utimer.Start();
for (int i = 0; i < repeats; ++i) {
for (int b = 0; b < num_blocks; ++b)
Uncompress(compressed[b], comp, input_length[b], &output[b]);
}
utimer.Stop();
ctime[run] = ctimer.Get();
utime[run] = utimer.Get();
}
compressed_size = 0;
for (const std::string& compressed_item : compressed) {
compressed_size += compressed_item.size();
}
}
std::sort(ctime, ctime + kRuns);
std::sort(utime, utime + kRuns);
const int med = kRuns/2;
float comp_rate = (length / ctime[med]) * repeats / 1048576.0;
float uncomp_rate = (length / utime[med]) * repeats / 1048576.0;
std::string x = names[comp];
x += ":";
std::string urate = (uncomp_rate >= 0) ? StrFormat("%.1f", uncomp_rate)
: std::string("?");
std::printf("%-7s [b %dM] bytes %6d -> %6d %4.1f%% "
"comp %5.1f MB/s uncomp %5s MB/s\n",
x.c_str(),
block_size/(1<<20),
static_cast<int>(length), static_cast<uint32_t>(compressed_size),
(compressed_size * 100.0) / std::max<int>(1, length),
comp_rate,
urate.c_str());
}
void CompressFile(const char* fname) {
std::string fullinput;
CHECK_OK(file::GetContents(fname, &fullinput, file::Defaults()));
std::string compressed;
Compress(fullinput.data(), fullinput.size(), SNAPPY, &compressed, false);
CHECK_OK(file::SetContents(std::string(fname).append(".comp"), compressed,
file::Defaults()));
}
void UncompressFile(const char* fname) {
std::string fullinput;
CHECK_OK(file::GetContents(fname, &fullinput, file::Defaults()));
size_t uncompLength;
CHECK(snappy::GetUncompressedLength(fullinput.data(), fullinput.size(),
&uncompLength));
std::string uncompressed;
uncompressed.resize(uncompLength);
CHECK(snappy::Uncompress(fullinput.data(), fullinput.size(), &uncompressed));
CHECK_OK(file::SetContents(std::string(fname).append(".uncomp"), uncompressed,
file::Defaults()));
}
void MeasureFile(const char* fname) {
std::string fullinput;
CHECK_OK(file::GetContents(fname, &fullinput, file::Defaults()));
std::printf("%-40s :\n", fname);
int start_len = (FLAGS_start_len < 0) ? fullinput.size() : FLAGS_start_len;
int end_len = fullinput.size();
if (FLAGS_end_len >= 0) {
end_len = std::min<int>(fullinput.size(), FLAGS_end_len);
}
for (int len = start_len; len <= end_len; ++len) {
const char* const input = fullinput.data();
int repeats = (FLAGS_bytes + len) / (len + 1);
if (FLAGS_zlib) Measure(input, len, ZLIB, repeats, 1024 << 10);
if (FLAGS_lzo) Measure(input, len, LZO, repeats, 1024 << 10);
if (FLAGS_lz4) Measure(input, len, LZ4, repeats, 1024 << 10);
if (FLAGS_snappy) Measure(input, len, SNAPPY, repeats, 4096 << 10);
// For block-size based measurements
if (0 && FLAGS_snappy) {
Measure(input, len, SNAPPY, repeats, 8<<10);
Measure(input, len, SNAPPY, repeats, 16<<10);
Measure(input, len, SNAPPY, repeats, 32<<10);
Measure(input, len, SNAPPY, repeats, 64<<10);
Measure(input, len, SNAPPY, repeats, 256<<10);
Measure(input, len, SNAPPY, repeats, 1024<<10);
}
}
}
} // namespace
} // namespace snappy
int main(int argc, char** argv) {
InitGoogle(argv[0], &argc, &argv, true);
for (int arg = 1; arg < argc; ++arg) {
if (FLAGS_write_compressed) {
snappy::CompressFile(argv[arg]);
} else if (FLAGS_write_uncompressed) {
snappy::UncompressFile(argv[arg]);
} else {
snappy::MeasureFile(argv[arg]);
}
}
return 0;
}

672
snappy_unittest.cc
View file

@ -26,10 +26,9 @@
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <algorithm>
#include <random>
#include <string>
#include <utility>
@ -37,31 +36,12 @@
#include "snappy-test.h"
#include "benchmark/benchmark.h"
#include "gtest/gtest.h"
#include "snappy.h"
#include "snappy-internal.h"
#include "snappy-sinksource.h"
DEFINE_int32(start_len, -1,
"Starting prefix size for testing (-1: just full file contents)");
DEFINE_int32(end_len, -1,
"Starting prefix size for testing (-1: just full file contents)");
DEFINE_int32(bytes, 10485760,
"How many bytes to compress/uncompress per file for timing");
DEFINE_bool(zlib, false,
"Run zlib compression (http://www.zlib.net)");
DEFINE_bool(lzo, false,
"Run LZO compression (http://www.oberhumer.com/opensource/lzo/)");
DEFINE_bool(lz4, false, "Run LZ4 compression (https://github.com/lz4/lz4)");
DEFINE_bool(snappy, true, "Run snappy compression");
DEFINE_bool(write_compressed, false,
"Write compressed versions of each file to <file>.comp");
DEFINE_bool(write_uncompressed, false,
"Write uncompressed versions of each file to <file>.uncomp");
#include "snappy.h"
#include "snappy_test_data.h"
DEFINE_bool(snappy_dump_decompression_table, false,
"If true, we print the decompression table during tests.");
@ -123,273 +103,6 @@ using DataEndingAtUnreadablePage = std::string;
#endif
enum CompressorType { ZLIB, LZO, LZ4, SNAPPY };
const char* names[] = {"ZLIB", "LZO", "LZ4", "SNAPPY"};
size_t MinimumRequiredOutputSpace(size_t input_size, CompressorType comp) {
switch (comp) {
#ifdef ZLIB_VERSION
case ZLIB:
return ZLib::MinCompressbufSize(input_size);
#endif // ZLIB_VERSION
#ifdef LZO_VERSION
case LZO:
return input_size + input_size/64 + 16 + 3;
#endif // LZO_VERSION
#ifdef LZ4_VERSION_NUMBER
case LZ4:
return LZ4_compressBound(input_size);
#endif // LZ4_VERSION_NUMBER
case SNAPPY:
return snappy::MaxCompressedLength(input_size);
default:
LOG(FATAL) << "Unknown compression type number " << comp;
return 0;
}
}
// Returns true if we successfully compressed, false otherwise.
//
// If compressed_is_preallocated is set, do not resize the compressed buffer.
// This is typically what you want for a benchmark, in order to not spend
// time in the memory allocator. If you do set this flag, however,
// "compressed" must be preinitialized to at least MinCompressbufSize(comp)
// number of bytes, and may contain junk bytes at the end after return.
bool Compress(const char* input, size_t input_size, CompressorType comp,
std::string* compressed, bool compressed_is_preallocated) {
if (!compressed_is_preallocated) {
compressed->resize(MinimumRequiredOutputSpace(input_size, comp));
}
switch (comp) {
#ifdef ZLIB_VERSION
case ZLIB: {
ZLib zlib;
uLongf destlen = compressed->size();
int ret = zlib.Compress(
reinterpret_cast<Bytef*>(string_as_array(compressed)),
&destlen,
reinterpret_cast<const Bytef*>(input),
input_size);
CHECK_EQ(Z_OK, ret);
if (!compressed_is_preallocated) {
compressed->resize(destlen);
}
return true;
}
#endif // ZLIB_VERSION
#ifdef LZO_VERSION
case LZO: {
unsigned char* mem = new unsigned char[LZO1X_1_15_MEM_COMPRESS];
lzo_uint destlen;
int ret = lzo1x_1_15_compress(
reinterpret_cast<const uint8_t*>(input),
input_size,
reinterpret_cast<uint8_t*>(string_as_array(compressed)),
&destlen,
mem);
CHECK_EQ(LZO_E_OK, ret);
delete[] mem;
if (!compressed_is_preallocated) {
compressed->resize(destlen);
}
break;
}
#endif // LZO_VERSION
#ifdef LZ4_VERSION_NUMBER
case LZ4: {
int destlen = compressed->size();
destlen = LZ4_compress_default(input, string_as_array(compressed),
input_size, destlen);
CHECK(destlen != 0);
if (!compressed_is_preallocated) {
compressed->resize(destlen);
}
break;
}
#endif // LZ4_VERSION_NUMBER
case SNAPPY: {
size_t destlen;
snappy::RawCompress(input, input_size,
string_as_array(compressed),
&destlen);
CHECK_LE(destlen, snappy::MaxCompressedLength(input_size));
if (!compressed_is_preallocated) {
compressed->resize(destlen);
}
break;
}
default: {
return false; // the asked-for library wasn't compiled in
}
}
return true;
}
bool Uncompress(const std::string& compressed, CompressorType comp, int size,
std::string* output) {
switch (comp) {
#ifdef ZLIB_VERSION
case ZLIB: {
output->resize(size);
ZLib zlib;
uLongf destlen = output->size();
int ret = zlib.Uncompress(
reinterpret_cast<Bytef*>(string_as_array(output)),
&destlen,
reinterpret_cast<const Bytef*>(compressed.data()),
compressed.size());
CHECK_EQ(Z_OK, ret);
CHECK_EQ(static_cast<uLongf>(size), destlen);
break;
}
#endif // ZLIB_VERSION
#ifdef LZO_VERSION
case LZO: {
output->resize(size);
lzo_uint destlen;
int ret = lzo1x_decompress(
reinterpret_cast<const uint8_t*>(compressed.data()),
compressed.size(),
reinterpret_cast<uint8_t*>(string_as_array(output)),
&destlen,
NULL);
CHECK_EQ(LZO_E_OK, ret);
CHECK_EQ(static_cast<lzo_uint>(size), destlen);
break;
}
#endif // LZO_VERSION
#ifdef LZ4_VERSION_NUMBER
case LZ4: {
output->resize(size);
int destlen = output->size();
destlen = LZ4_decompress_safe(compressed.data(), string_as_array(output),
compressed.size(), destlen);
CHECK(destlen != 0);
CHECK_EQ(size, destlen);
break;
}
#endif // LZ4_VERSION_NUMBER
case SNAPPY: {
snappy::RawUncompress(compressed.data(), compressed.size(),
string_as_array(output));
break;
}
default: {
return false; // the asked-for library wasn't compiled in
}
}
return true;
}
void Measure(const char* data, size_t length, CompressorType comp, int repeats,
int block_size) {
// Run tests a few time and pick median running times
static const int kRuns = 5;
double ctime[kRuns];
double utime[kRuns];
int compressed_size = 0;
{
// Chop the input into blocks
int num_blocks = (length + block_size - 1) / block_size;
std::vector<const char*> input(num_blocks);
std::vector<size_t> input_length(num_blocks);
std::vector<std::string> compressed(num_blocks);
std::vector<std::string> output(num_blocks);
for (int b = 0; b < num_blocks; ++b) {
int input_start = b * block_size;
int input_limit = std::min<int>((b+1)*block_size, length);
input[b] = data+input_start;
input_length[b] = input_limit-input_start;
}
// Pre-grow the output buffers so we don't measure string append time.
for (std::string& compressed_block : compressed) {
compressed_block.resize(MinimumRequiredOutputSpace(block_size, comp));
}
// First, try one trial compression to make sure the code is compiled in
if (!Compress(input[0], input_length[0], comp, &compressed[0], true)) {
LOG(WARNING) << "Skipping " << names[comp] << ": "
<< "library not compiled in";
return;
}
for (int run = 0; run < kRuns; ++run) {
CycleTimer ctimer, utimer;
// Pre-grow the output buffers so we don't measure string append time.
for (std::string& compressed_block : compressed) {
compressed_block.resize(MinimumRequiredOutputSpace(block_size, comp));
}
ctimer.Start();
for (int b = 0; b < num_blocks; ++b) {
for (int i = 0; i < repeats; ++i)
Compress(input[b], input_length[b], comp, &compressed[b], true);
}
ctimer.Stop();
// Compress once more, with resizing, so we don't leave junk
// at the end that will confuse the decompressor.
for (int b = 0; b < num_blocks; ++b) {
Compress(input[b], input_length[b], comp, &compressed[b], false);
}
for (int b = 0; b < num_blocks; ++b) {
output[b].resize(input_length[b]);
}
utimer.Start();
for (int i = 0; i < repeats; ++i) {
for (int b = 0; b < num_blocks; ++b)
Uncompress(compressed[b], comp, input_length[b], &output[b]);
}
utimer.Stop();
ctime[run] = ctimer.Get();
utime[run] = utimer.Get();
}
compressed_size = 0;
for (const std::string& compressed_item : compressed) {
compressed_size += compressed_item.size();
}
}
std::sort(ctime, ctime + kRuns);
std::sort(utime, utime + kRuns);
const int med = kRuns/2;
float comp_rate = (length / ctime[med]) * repeats / 1048576.0;
float uncomp_rate = (length / utime[med]) * repeats / 1048576.0;
std::string x = names[comp];
x += ":";
std::string urate = (uncomp_rate >= 0) ? StrFormat("%.1f", uncomp_rate)
: std::string("?");
std::printf("%-7s [b %dM] bytes %6d -> %6d %4.1f%% "
"comp %5.1f MB/s uncomp %5s MB/s\n",
x.c_str(),
block_size/(1<<20),
static_cast<int>(length), static_cast<uint32_t>(compressed_size),
(compressed_size * 100.0) / std::max<int>(1, length),
comp_rate,
urate.c_str());
}
int VerifyString(const std::string& input) {
std::string compressed;
DataEndingAtUnreadablePage i(input);
@ -633,7 +346,7 @@ TEST(CorruptedTest, VerifyCorrupted) {
// These mirror the compression code in snappy.cc, but are copied
// here so that we can bypass some limitations in the how snappy.cc
// invokes these routines.
static void AppendLiteral(std::string* dst, const std::string& literal) {
void AppendLiteral(std::string* dst, const std::string& literal) {
if (literal.empty()) return;
int n = literal.size() - 1;
if (n < 60) {
@ -653,7 +366,7 @@ static void AppendLiteral(std::string* dst, const std::string& literal) {
*dst += literal;
}
static void AppendCopy(std::string* dst, int offset, int length) {
void AppendCopy(std::string* dst, int offset, int length) {
while (length > 0) {
// Figure out how much to copy in one shot
int to_copy;
@ -1241,382 +954,13 @@ TEST(Snappy, VerifyCharTable) {
}
}
void CompressFile(const char* fname) {
std::string fullinput;
CHECK_OK(file::GetContents(fname, &fullinput, file::Defaults()));
std::string compressed;
Compress(fullinput.data(), fullinput.size(), SNAPPY, &compressed, false);
CHECK_OK(file::SetContents(std::string(fname).append(".comp"), compressed,
file::Defaults()));
}
void UncompressFile(const char* fname) {
std::string fullinput;
CHECK_OK(file::GetContents(fname, &fullinput, file::Defaults()));
size_t uncompLength;
CHECK(CheckUncompressedLength(fullinput, &uncompLength));
std::string uncompressed;
uncompressed.resize(uncompLength);
CHECK(snappy::Uncompress(fullinput.data(), fullinput.size(), &uncompressed));
CHECK_OK(file::SetContents(std::string(fname).append(".uncomp"), uncompressed,
file::Defaults()));
}
void MeasureFile(const char* fname) {
std::string fullinput;
CHECK_OK(file::GetContents(fname, &fullinput, file::Defaults()));
std::printf("%-40s :\n", fname);
int start_len = (FLAGS_start_len < 0) ? fullinput.size() : FLAGS_start_len;
int end_len = fullinput.size();
if (FLAGS_end_len >= 0) {
end_len = std::min<int>(fullinput.size(), FLAGS_end_len);
}
for (int len = start_len; len <= end_len; ++len) {
const char* const input = fullinput.data();
int repeats = (FLAGS_bytes + len) / (len + 1);
if (FLAGS_zlib) Measure(input, len, ZLIB, repeats, 1024 << 10);
if (FLAGS_lzo) Measure(input, len, LZO, repeats, 1024 << 10);
if (FLAGS_lz4) Measure(input, len, LZ4, repeats, 1024 << 10);
if (FLAGS_snappy) Measure(input, len, SNAPPY, repeats, 4096 << 10);
// For block-size based measurements
if (0 && FLAGS_snappy) {
Measure(input, len, SNAPPY, repeats, 8<<10);
Measure(input, len, SNAPPY, repeats, 16<<10);
Measure(input, len, SNAPPY, repeats, 32<<10);
Measure(input, len, SNAPPY, repeats, 64<<10);
Measure(input, len, SNAPPY, repeats, 256<<10);
Measure(input, len, SNAPPY, repeats, 1024<<10);
}
}
}
static struct {
const char* label;
const char* filename;
size_t size_limit;
} files[] = {
{ "html", "html", 0 },
{ "urls", "urls.10K", 0 },
{ "jpg", "fireworks.jpeg", 0 },
{ "jpg_200", "fireworks.jpeg", 200 },
{ "pdf", "paper-100k.pdf", 0 },
{ "html4", "html_x_4", 0 },
{ "txt1", "alice29.txt", 0 },
{ "txt2", "asyoulik.txt", 0 },
{ "txt3", "lcet10.txt", 0 },
{ "txt4", "plrabn12.txt", 0 },
{ "pb", "geo.protodata", 0 },
{ "gaviota", "kppkn.gtb", 0 },
};
TEST(Snappy, TestBenchmarkFiles) {
for (int i = 0; i < ARRAYSIZE(files); ++i) {
Verify(ReadTestDataFile(files[i].filename, files[i].size_limit));
for (int i = 0; i < ARRAYSIZE(kTestDataFiles); ++i) {
Verify(ReadTestDataFile(kTestDataFiles[i].filename,
kTestDataFiles[i].size_limit));
}
}
void BM_UFlat(benchmark::State& state) {
// Pick file to process based on state.range(0).
int file_index = state.range(0);
CHECK_GE(file_index, 0);
CHECK_LT(file_index, ARRAYSIZE(files));
std::string contents = ReadTestDataFile(files[file_index].filename,
files[file_index].size_limit);
std::string zcontents;
snappy::Compress(contents.data(), contents.size(), &zcontents);
char* dst = new char[contents.size()];
for (auto s : state) {
CHECK(snappy::RawUncompress(zcontents.data(), zcontents.size(), dst));
benchmark::DoNotOptimize(dst);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
static_cast<int64_t>(contents.size()));
state.SetLabel(files[file_index].label);
delete[] dst;
}
BENCHMARK(BM_UFlat)->DenseRange(0, ARRAYSIZE(files) - 1);
struct SourceFiles {
SourceFiles() {
for (int i = 0; i < kFiles; i++) {
std::string contents =
ReadTestDataFile(files[i].filename, files[i].size_limit);
max_size = std::max(max_size, contents.size());
sizes[i] = contents.size();
snappy::Compress(contents.data(), contents.size(), &zcontents[i]);
}
}
static constexpr int kFiles = ARRAYSIZE(files);
std::string zcontents[kFiles];
size_t sizes[kFiles];
size_t max_size = 0;
};
void BM_UFlatMedley(benchmark::State& state) {
static const SourceFiles* const source = new SourceFiles();
std::vector<char> dst(source->max_size);
for (auto s : state) {
for (int i = 0; i < SourceFiles::kFiles; i++) {
CHECK(snappy::RawUncompress(source->zcontents[i].data(),
source->zcontents[i].size(), dst.data()));
benchmark::DoNotOptimize(dst);
}
}
int64_t source_sizes = 0;
for (int i = 0; i < SourceFiles::kFiles; i++) {
source_sizes += static_cast<int64_t>(source->sizes[i]);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
source_sizes);
}
BENCHMARK(BM_UFlatMedley);
void BM_UValidate(benchmark::State& state) {
// Pick file to process based on state.range(0).
int file_index = state.range(0);
CHECK_GE(file_index, 0);
CHECK_LT(file_index, ARRAYSIZE(files));
std::string contents = ReadTestDataFile(files[file_index].filename,
files[file_index].size_limit);
std::string zcontents;
snappy::Compress(contents.data(), contents.size(), &zcontents);
for (auto s : state) {
CHECK(snappy::IsValidCompressedBuffer(zcontents.data(), zcontents.size()));
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
static_cast<int64_t>(contents.size()));
state.SetLabel(files[file_index].label);
}
BENCHMARK(BM_UValidate)->DenseRange(0, ARRAYSIZE(files) - 1);
void BM_UValidateMedley(benchmark::State& state) {
static const SourceFiles* const source = new SourceFiles();
for (auto s : state) {
for (int i = 0; i < SourceFiles::kFiles; i++) {
CHECK(snappy::IsValidCompressedBuffer(source->zcontents[i].data(),
source->zcontents[i].size()));
}
}
int64_t source_sizes = 0;
for (int i = 0; i < SourceFiles::kFiles; i++) {
source_sizes += static_cast<int64_t>(source->sizes[i]);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
source_sizes);
}
BENCHMARK(BM_UValidateMedley);
void BM_UIOVec(benchmark::State& state) {
// Pick file to process based on state.range(0).
int file_index = state.range(0);
CHECK_GE(file_index, 0);
CHECK_LT(file_index, ARRAYSIZE(files));
std::string contents = ReadTestDataFile(files[file_index].filename,
files[file_index].size_limit);
std::string zcontents;
snappy::Compress(contents.data(), contents.size(), &zcontents);
// Uncompress into an iovec containing ten entries.
const int kNumEntries = 10;
struct iovec iov[kNumEntries];
char *dst = new char[contents.size()];
size_t used_so_far = 0;
for (int i = 0; i < kNumEntries; ++i) {
iov[i].iov_base = dst + used_so_far;
if (used_so_far == contents.size()) {
iov[i].iov_len = 0;
continue;
}
if (i == kNumEntries - 1) {
iov[i].iov_len = contents.size() - used_so_far;
} else {
iov[i].iov_len = contents.size() / kNumEntries;
}
used_so_far += iov[i].iov_len;
}
for (auto s : state) {
CHECK(snappy::RawUncompressToIOVec(zcontents.data(), zcontents.size(), iov,
kNumEntries));
benchmark::DoNotOptimize(iov);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
static_cast<int64_t>(contents.size()));
state.SetLabel(files[file_index].label);
delete[] dst;
}
BENCHMARK(BM_UIOVec)->DenseRange(0, 4);
void BM_UFlatSink(benchmark::State& state) {
// Pick file to process based on state.range(0).
int file_index = state.range(0);
CHECK_GE(file_index, 0);
CHECK_LT(file_index, ARRAYSIZE(files));
std::string contents = ReadTestDataFile(files[file_index].filename,
files[file_index].size_limit);
std::string zcontents;
snappy::Compress(contents.data(), contents.size(), &zcontents);
char* dst = new char[contents.size()];
for (auto s : state) {
snappy::ByteArraySource source(zcontents.data(), zcontents.size());
snappy::UncheckedByteArraySink sink(dst);
CHECK(snappy::Uncompress(&source, &sink));
benchmark::DoNotOptimize(sink);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
static_cast<int64_t>(contents.size()));
state.SetLabel(files[file_index].label);
std::string s(dst, contents.size());
CHECK_EQ(contents, s);
delete[] dst;
}
BENCHMARK(BM_UFlatSink)->DenseRange(0, ARRAYSIZE(files) - 1);
void BM_ZFlat(benchmark::State& state) {
// Pick file to process based on state.range(0).
int file_index = state.range(0);
CHECK_GE(file_index, 0);
CHECK_LT(file_index, ARRAYSIZE(files));
std::string contents = ReadTestDataFile(files[file_index].filename,
files[file_index].size_limit);
char* dst = new char[snappy::MaxCompressedLength(contents.size())];
size_t zsize = 0;
for (auto s : state) {
snappy::RawCompress(contents.data(), contents.size(), dst, &zsize);
benchmark::DoNotOptimize(dst);
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
static_cast<int64_t>(contents.size()));
const double compression_ratio =
static_cast<double>(zsize) / std::max<size_t>(1, contents.size());
state.SetLabel(StrFormat("%s (%.2f %%)", files[file_index].label,
100.0 * compression_ratio));
VLOG(0) << StrFormat("compression for %s: %d -> %d bytes",
files[file_index].label, contents.size(), zsize);
delete[] dst;
}
BENCHMARK(BM_ZFlat)->DenseRange(0, ARRAYSIZE(files) - 1);
void BM_ZFlatAll(benchmark::State& state) {
const int num_files = ARRAYSIZE(files);
std::vector<std::string> contents(num_files);
std::vector<char*> dst(num_files);
int64_t total_contents_size = 0;
for (int i = 0; i < num_files; ++i) {
contents[i] = ReadTestDataFile(files[i].filename, files[i].size_limit);
dst[i] = new char[snappy::MaxCompressedLength(contents[i].size())];
total_contents_size += contents[i].size();
}
size_t zsize = 0;
for (auto s : state) {
for (int i = 0; i < num_files; ++i) {
snappy::RawCompress(contents[i].data(), contents[i].size(), dst[i],
&zsize);
benchmark::DoNotOptimize(dst);
}
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
total_contents_size);
for (char* dst_item : dst) {
delete[] dst_item;
}
state.SetLabel(StrFormat("%d files", num_files));
}
BENCHMARK(BM_ZFlatAll);
void BM_ZFlatIncreasingTableSize(benchmark::State& state) {
CHECK_GT(ARRAYSIZE(files), 0);
const std::string base_content =
ReadTestDataFile(files[0].filename, files[0].size_limit);
std::vector<std::string> contents;
std::vector<char*> dst;
int64_t total_contents_size = 0;
for (int table_bits = kMinHashTableBits; table_bits <= kMaxHashTableBits;
++table_bits) {
std::string content = base_content;
content.resize(1 << table_bits);
dst.push_back(new char[snappy::MaxCompressedLength(content.size())]);
total_contents_size += content.size();
contents.push_back(std::move(content));
}
size_t zsize = 0;
for (auto s : state) {
for (size_t i = 0; i < contents.size(); ++i) {
snappy::RawCompress(contents[i].data(), contents[i].size(), dst[i],
&zsize);
benchmark::DoNotOptimize(dst);
}
}
state.SetBytesProcessed(static_cast<int64_t>(state.iterations()) *
total_contents_size);
for (char* dst_item : dst) {
delete[] dst_item;
}
state.SetLabel(StrFormat("%d tables", contents.size()));
}
BENCHMARK(BM_ZFlatIncreasingTableSize);
} // namespace
} // namespace snappy
int main(int argc, char** argv) {
testing::InitGoogleTest(&argc, argv);
InitGoogle(argv[0], &argc, &argv, true);
::benchmark::RunSpecifiedBenchmarks();
if (argc >= 2) {
for (int arg = 1; arg < argc; ++arg) {
if (FLAGS_write_compressed) {
snappy::CompressFile(argv[arg]);
} else if (FLAGS_write_uncompressed) {
snappy::UncompressFile(argv[arg]);
} else {
snappy::MeasureFile(argv[arg]);
}
}
return 0;
}
return RUN_ALL_TESTS();
}