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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include "cache/compressed_secondary_cache.h"
#include <array>
#include <iterator>
#include <memory>
#include <tuple>
#include "cache/secondary_cache_adapter.h"
#include "memory/jemalloc_nodump_allocator.h"
#include "rocksdb/convenience.h"
#include "test_util/secondary_cache_test_util.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
#include "util/cast_util.h"
namespace ROCKSDB_NAMESPACE {
using secondary_cache_test_util::GetTestingCacheTypes;
using secondary_cache_test_util::WithCacheType;
// 16 bytes for HCC compatibility
const std::string key0 = "____ ____key0";
const std::string key1 = "____ ____key1";
const std::string key2 = "____ ____key2";
const std::string key3 = "____ ____key3";
class CompressedSecondaryCacheTestBase : public testing::Test,
public WithCacheType {
public:
CompressedSecondaryCacheTestBase() {}
~CompressedSecondaryCacheTestBase() override = default;
protected:
void BasicTestHelper(std::shared_ptr<SecondaryCache> sec_cache,
bool sec_cache_is_compressed) {
get_perf_context()->Reset();
bool kept_in_sec_cache{true};
// Lookup an non-existent key.
std::unique_ptr<SecondaryCacheResultHandle> handle0 =
sec_cache->Lookup(key0, GetHelper(), this, true, /*advise_erase=*/true,
kept_in_sec_cache);
ASSERT_EQ(handle0, nullptr);
Random rnd(301);
// Insert and Lookup the item k1 for the first time.
std::string str1(rnd.RandomString(1000));
TestItem item1(str1.data(), str1.length());
// A dummy handle is inserted if the item is inserted for the first time.
ASSERT_OK(sec_cache->Insert(key1, &item1, GetHelper()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 1);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
std::unique_ptr<SecondaryCacheResultHandle> handle1_1 =
sec_cache->Lookup(key1, GetHelper(), this, true, /*advise_erase=*/false,
kept_in_sec_cache);
ASSERT_EQ(handle1_1, nullptr);
// Insert and Lookup the item k1 for the second time and advise erasing it.
ASSERT_OK(sec_cache->Insert(key1, &item1, GetHelper()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 1);
std::unique_ptr<SecondaryCacheResultHandle> handle1_2 =
sec_cache->Lookup(key1, GetHelper(), this, true, /*advise_erase=*/true,
kept_in_sec_cache);
ASSERT_NE(handle1_2, nullptr);
ASSERT_FALSE(kept_in_sec_cache);
if (sec_cache_is_compressed) {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes,
1000);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes,
1007);
} else {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
}
std::unique_ptr<TestItem> val1 =
std::unique_ptr<TestItem>(static_cast<TestItem*>(handle1_2->Value()));
ASSERT_NE(val1, nullptr);
ASSERT_EQ(memcmp(val1->Buf(), item1.Buf(), item1.Size()), 0);
// Lookup the item k1 again.
std::unique_ptr<SecondaryCacheResultHandle> handle1_3 =
sec_cache->Lookup(key1, GetHelper(), this, true, /*advise_erase=*/true,
kept_in_sec_cache);
ASSERT_EQ(handle1_3, nullptr);
// Insert and Lookup the item k2.
std::string str2(rnd.RandomString(1000));
TestItem item2(str2.data(), str2.length());
ASSERT_OK(sec_cache->Insert(key2, &item2, GetHelper()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 2);
std::unique_ptr<SecondaryCacheResultHandle> handle2_1 =
sec_cache->Lookup(key2, GetHelper(), this, true, /*advise_erase=*/false,
kept_in_sec_cache);
ASSERT_EQ(handle2_1, nullptr);
ASSERT_OK(sec_cache->Insert(key2, &item2, GetHelper()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 2);
if (sec_cache_is_compressed) {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes,
2000);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes,
2014);
} else {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
}
std::unique_ptr<SecondaryCacheResultHandle> handle2_2 =
sec_cache->Lookup(key2, GetHelper(), this, true, /*advise_erase=*/false,
kept_in_sec_cache);
ASSERT_NE(handle2_2, nullptr);
std::unique_ptr<TestItem> val2 =
std::unique_ptr<TestItem>(static_cast<TestItem*>(handle2_2->Value()));
ASSERT_NE(val2, nullptr);
ASSERT_EQ(memcmp(val2->Buf(), item2.Buf(), item2.Size()), 0);
std::vector<SecondaryCacheResultHandle*> handles = {handle1_2.get(),
handle2_2.get()};
sec_cache->WaitAll(handles);
sec_cache.reset();
}
void BasicTest(bool sec_cache_is_compressed, bool use_jemalloc) {
CompressedSecondaryCacheOptions opts;
opts.capacity = 2048;
opts.num_shard_bits = 0;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
opts.compression_type = CompressionType::kNoCompression;
sec_cache_is_compressed = false;
}
} else {
opts.compression_type = CompressionType::kNoCompression;
}
if (use_jemalloc) {
JemallocAllocatorOptions jopts;
std::shared_ptr<MemoryAllocator> allocator;
std::string msg;
if (JemallocNodumpAllocator::IsSupported(&msg)) {
Status s = NewJemallocNodumpAllocator(jopts, &allocator);
if (s.ok()) {
opts.memory_allocator = allocator;
}
} else {
ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
}
}
std::shared_ptr<SecondaryCache> sec_cache =
NewCompressedSecondaryCache(opts);
BasicTestHelper(sec_cache, sec_cache_is_compressed);
}
void FailsTest(bool sec_cache_is_compressed) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 1100;
secondary_cache_opts.num_shard_bits = 0;
std::shared_ptr<SecondaryCache> sec_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
// Insert and Lookup the first item.
Random rnd(301);
std::string str1(rnd.RandomString(1000));
TestItem item1(str1.data(), str1.length());
// Insert a dummy handle.
ASSERT_OK(sec_cache->Insert(key1, &item1, GetHelper()));
// Insert k1.
ASSERT_OK(sec_cache->Insert(key1, &item1, GetHelper()));
// Insert and Lookup the second item.
std::string str2(rnd.RandomString(200));
TestItem item2(str2.data(), str2.length());
// Insert a dummy handle, k1 is not evicted.
ASSERT_OK(sec_cache->Insert(key2, &item2, GetHelper()));
bool kept_in_sec_cache{false};
std::unique_ptr<SecondaryCacheResultHandle> handle1 =
sec_cache->Lookup(key1, GetHelper(), this, true, /*advise_erase=*/false,
kept_in_sec_cache);
ASSERT_EQ(handle1, nullptr);
// Insert k2 and k1 is evicted.
ASSERT_OK(sec_cache->Insert(key2, &item2, GetHelper()));
std::unique_ptr<SecondaryCacheResultHandle> handle2 =
sec_cache->Lookup(key2, GetHelper(), this, true, /*advise_erase=*/false,
kept_in_sec_cache);
ASSERT_NE(handle2, nullptr);
std::unique_ptr<TestItem> val2 =
std::unique_ptr<TestItem>(static_cast<TestItem*>(handle2->Value()));
ASSERT_NE(val2, nullptr);
ASSERT_EQ(memcmp(val2->Buf(), item2.Buf(), item2.Size()), 0);
// Insert k1 again and a dummy handle is inserted.
ASSERT_OK(sec_cache->Insert(key1, &item1, GetHelper()));
std::unique_ptr<SecondaryCacheResultHandle> handle1_1 =
sec_cache->Lookup(key1, GetHelper(), this, true, /*advise_erase=*/false,
kept_in_sec_cache);
ASSERT_EQ(handle1_1, nullptr);
// Create Fails.
SetFailCreate(true);
std::unique_ptr<SecondaryCacheResultHandle> handle2_1 =
sec_cache->Lookup(key2, GetHelper(), this, true, /*advise_erase=*/true,
kept_in_sec_cache);
ASSERT_EQ(handle2_1, nullptr);
// Save Fails.
std::string str3 = rnd.RandomString(10);
TestItem item3(str3.data(), str3.length());
// The Status is OK because a dummy handle is inserted.
ASSERT_OK(sec_cache->Insert(key3, &item3, GetHelperFail()));
ASSERT_NOK(sec_cache->Insert(key3, &item3, GetHelperFail()));
sec_cache.reset();
}
void BasicIntegrationTest(bool sec_cache_is_compressed,
bool enable_custom_split_merge) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
sec_cache_is_compressed = false;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 6000;
secondary_cache_opts.num_shard_bits = 0;
secondary_cache_opts.enable_custom_split_merge = enable_custom_split_merge;
std::shared_ptr<SecondaryCache> secondary_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
std::shared_ptr<Cache> cache = NewCache(
/*_capacity =*/1300, /*_num_shard_bits =*/0,
/*_strict_capacity_limit =*/true, secondary_cache);
std::shared_ptr<Statistics> stats = CreateDBStatistics();
get_perf_context()->Reset();
Random rnd(301);
std::string str1 = rnd.RandomString(1001);
auto item1_1 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert(key1, item1_1, GetHelper(), str1.length()));
std::string str2 = rnd.RandomString(1012);
auto item2_1 = new TestItem(str2.data(), str2.length());
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's dummy item.
ASSERT_OK(cache->Insert(key2, item2_1, GetHelper(), str2.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 1);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
std::string str3 = rnd.RandomString(1024);
auto item3_1 = new TestItem(str3.data(), str3.length());
// After this Insert, primary cache contains k3 and secondary cache contains
// k1's dummy item and k2's dummy item.
ASSERT_OK(cache->Insert(key3, item3_1, GetHelper(), str3.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 2);
// After this Insert, primary cache contains k1 and secondary cache contains
// k1's dummy item, k2's dummy item, and k3's dummy item.
auto item1_2 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert(key1, item1_2, GetHelper(), str1.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 3);
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's item, k2's dummy item, and k3's dummy item.
auto item2_2 = new TestItem(str2.data(), str2.length());
ASSERT_OK(cache->Insert(key2, item2_2, GetHelper(), str2.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 1);
if (sec_cache_is_compressed) {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes,
str1.length());
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes,
1008);
} else {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
}
// After this Insert, primary cache contains k3 and secondary cache contains
// k1's item and k2's item.
auto item3_2 = new TestItem(str3.data(), str3.length());
ASSERT_OK(cache->Insert(key3, item3_2, GetHelper(), str3.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 2);
if (sec_cache_is_compressed) {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes,
str1.length() + str2.length());
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes,
2027);
} else {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
}
Cache::Handle* handle;
handle = cache->Lookup(key3, GetHelper(), this, Cache::Priority::LOW,
stats.get());
ASSERT_NE(handle, nullptr);
auto val3 = static_cast<TestItem*>(cache->Value(handle));
ASSERT_NE(val3, nullptr);
ASSERT_EQ(memcmp(val3->Buf(), item3_2->Buf(), item3_2->Size()), 0);
cache->Release(handle);
// Lookup an non-existent key.
handle = cache->Lookup(key0, GetHelper(), this, Cache::Priority::LOW,
stats.get());
ASSERT_EQ(handle, nullptr);
// This Lookup should just insert a dummy handle in the primary cache
// and the k1 is still in the secondary cache.
handle = cache->Lookup(key1, GetHelper(), this, Cache::Priority::LOW,
stats.get());
ASSERT_NE(handle, nullptr);
ASSERT_EQ(get_perf_context()->block_cache_standalone_handle_count, 1);
auto val1_1 = static_cast<TestItem*>(cache->Value(handle));
ASSERT_NE(val1_1, nullptr);
ASSERT_EQ(memcmp(val1_1->Buf(), str1.data(), str1.size()), 0);
cache->Release(handle);
// This Lookup should erase k1 from the secondary cache and insert
// it into primary cache; then k3 is demoted.
// k2 and k3 are in secondary cache.
handle = cache->Lookup(key1, GetHelper(), this, Cache::Priority::LOW,
stats.get());
ASSERT_NE(handle, nullptr);
ASSERT_EQ(get_perf_context()->block_cache_standalone_handle_count, 1);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 3);
cache->Release(handle);
// k2 is still in secondary cache.
handle = cache->Lookup(key2, GetHelper(), this, Cache::Priority::LOW,
stats.get());
ASSERT_NE(handle, nullptr);
ASSERT_EQ(get_perf_context()->block_cache_standalone_handle_count, 2);
cache->Release(handle);
// Testing SetCapacity().
ASSERT_OK(secondary_cache->SetCapacity(0));
handle = cache->Lookup(key3, GetHelper(), this, Cache::Priority::LOW,
stats.get());
ASSERT_EQ(handle, nullptr);
ASSERT_OK(secondary_cache->SetCapacity(7000));
size_t capacity;
ASSERT_OK(secondary_cache->GetCapacity(capacity));
ASSERT_EQ(capacity, 7000);
auto item1_3 = new TestItem(str1.data(), str1.length());
// After this Insert, primary cache contains k1.
ASSERT_OK(cache->Insert(key1, item1_3, GetHelper(), str2.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 3);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 4);
auto item2_3 = new TestItem(str2.data(), str2.length());
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's dummy item.
ASSERT_OK(cache->Insert(key2, item2_3, GetHelper(), str1.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 4);
auto item1_4 = new TestItem(str1.data(), str1.length());
// After this Insert, primary cache contains k1 and secondary cache contains
// k1's dummy item and k2's dummy item.
ASSERT_OK(cache->Insert(key1, item1_4, GetHelper(), str2.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 5);
auto item2_4 = new TestItem(str2.data(), str2.length());
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's real item and k2's dummy item.
ASSERT_OK(cache->Insert(key2, item2_4, GetHelper(), str2.length()));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 5);
// This Lookup should just insert a dummy handle in the primary cache
// and the k1 is still in the secondary cache.
handle = cache->Lookup(key1, GetHelper(), this, Cache::Priority::LOW,
stats.get());
ASSERT_NE(handle, nullptr);
cache->Release(handle);
ASSERT_EQ(get_perf_context()->block_cache_standalone_handle_count, 3);
cache.reset();
secondary_cache.reset();
}
void BasicIntegrationFailTest(bool sec_cache_is_compressed) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 6000;
secondary_cache_opts.num_shard_bits = 0;
std::shared_ptr<SecondaryCache> secondary_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
std::shared_ptr<Cache> cache = NewCache(
/*_capacity=*/1300, /*_num_shard_bits=*/0,
/*_strict_capacity_limit=*/false, secondary_cache);
Random rnd(301);
std::string str1 = rnd.RandomString(1001);
auto item1 = std::make_unique<TestItem>(str1.data(), str1.length());
ASSERT_OK(cache->Insert(key1, item1.get(), GetHelper(), str1.length()));
item1.release(); // Appease clang-analyze "potential memory leak"
Cache::Handle* handle;
handle = cache->Lookup(key2, nullptr, this, Cache::Priority::LOW);
ASSERT_EQ(handle, nullptr);
handle = cache->Lookup(key2, GetHelper(), this, Cache::Priority::LOW);
ASSERT_EQ(handle, nullptr);
Cache::AsyncLookupHandle ah;
ah.key = key2;
ah.helper = GetHelper();
ah.create_context = this;
ah.priority = Cache::Priority::LOW;
cache->StartAsyncLookup(ah);
cache->Wait(ah);
ASSERT_EQ(ah.Result(), nullptr);
cache.reset();
secondary_cache.reset();
}
void IntegrationSaveFailTest(bool sec_cache_is_compressed) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 6000;
secondary_cache_opts.num_shard_bits = 0;
std::shared_ptr<SecondaryCache> secondary_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
std::shared_ptr<Cache> cache = NewCache(
/*_capacity=*/1300, /*_num_shard_bits=*/0,
/*_strict_capacity_limit=*/true, secondary_cache);
Random rnd(301);
std::string str1 = rnd.RandomString(1001);
auto item1 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert(key1, item1, GetHelperFail(), str1.length()));
std::string str2 = rnd.RandomString(1002);
auto item2 = new TestItem(str2.data(), str2.length());
// k1 should be demoted to the secondary cache.
ASSERT_OK(cache->Insert(key2, item2, GetHelperFail(), str2.length()));
Cache::Handle* handle;
handle = cache->Lookup(key2, GetHelperFail(), this, Cache::Priority::LOW);
ASSERT_NE(handle, nullptr);
cache->Release(handle);
// This lookup should fail, since k1 demotion would have failed.
handle = cache->Lookup(key1, GetHelperFail(), this, Cache::Priority::LOW);
ASSERT_EQ(handle, nullptr);
// Since k1 was not promoted, k2 should still be in cache.
handle = cache->Lookup(key2, GetHelperFail(), this, Cache::Priority::LOW);
ASSERT_NE(handle, nullptr);
cache->Release(handle);
cache.reset();
secondary_cache.reset();
}
void IntegrationCreateFailTest(bool sec_cache_is_compressed) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 6000;
secondary_cache_opts.num_shard_bits = 0;
std::shared_ptr<SecondaryCache> secondary_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
std::shared_ptr<Cache> cache = NewCache(
/*_capacity=*/1300, /*_num_shard_bits=*/0,
/*_strict_capacity_limit=*/true, secondary_cache);
Random rnd(301);
std::string str1 = rnd.RandomString(1001);
auto item1 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert(key1, item1, GetHelper(), str1.length()));
std::string str2 = rnd.RandomString(1002);
auto item2 = new TestItem(str2.data(), str2.length());
// k1 should be demoted to the secondary cache.
ASSERT_OK(cache->Insert(key2, item2, GetHelper(), str2.length()));
Cache::Handle* handle;
SetFailCreate(true);
handle = cache->Lookup(key2, GetHelper(), this, Cache::Priority::LOW);
ASSERT_NE(handle, nullptr);
cache->Release(handle);
// This lookup should fail, since k1 creation would have failed
handle = cache->Lookup(key1, GetHelper(), this, Cache::Priority::LOW);
ASSERT_EQ(handle, nullptr);
// Since k1 didn't get promoted, k2 should still be in cache
handle = cache->Lookup(key2, GetHelper(), this, Cache::Priority::LOW);
ASSERT_NE(handle, nullptr);
cache->Release(handle);
cache.reset();
secondary_cache.reset();
}
void IntegrationFullCapacityTest(bool sec_cache_is_compressed) {
CompressedSecondaryCacheOptions secondary_cache_opts;
if (sec_cache_is_compressed) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
} else {
secondary_cache_opts.compression_type = CompressionType::kNoCompression;
}
secondary_cache_opts.capacity = 6000;
secondary_cache_opts.num_shard_bits = 0;
std::shared_ptr<SecondaryCache> secondary_cache =
NewCompressedSecondaryCache(secondary_cache_opts);
std::shared_ptr<Cache> cache = NewCache(
/*_capacity=*/1300, /*_num_shard_bits=*/0,
/*_strict_capacity_limit=*/false, secondary_cache);
Random rnd(301);
std::string str1 = rnd.RandomString(1001);
auto item1_1 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert(key1, item1_1, GetHelper(), str1.length()));
std::string str2 = rnd.RandomString(1002);
std::string str2_clone{str2};
auto item2 = new TestItem(str2.data(), str2.length());
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's dummy item.
ASSERT_OK(cache->Insert(key2, item2, GetHelper(), str2.length()));
// After this Insert, primary cache contains k1 and secondary cache contains
// k1's dummy item and k2's dummy item.
auto item1_2 = new TestItem(str1.data(), str1.length());
ASSERT_OK(cache->Insert(key1, item1_2, GetHelper(), str1.length()));
auto item2_2 = new TestItem(str2.data(), str2.length());
// After this Insert, primary cache contains k2 and secondary cache contains
// k1's item and k2's dummy item.
ASSERT_OK(cache->Insert(key2, item2_2, GetHelper(), str2.length()));
Cache::Handle* handle2;
handle2 = cache->Lookup(key2, GetHelper(), this, Cache::Priority::LOW);
ASSERT_NE(handle2, nullptr);
cache->Release(handle2);
// k1 promotion should fail because cache is at capacity and
// strict_capacity_limit is true, but the lookup should still succeed.
// A k1's dummy item is inserted into primary cache.
Cache::Handle* handle1;
handle1 = cache->Lookup(key1, GetHelper(), this, Cache::Priority::LOW);
ASSERT_NE(handle1, nullptr);
cache->Release(handle1);
// Since k1 didn't get inserted, k2 should still be in cache
handle2 = cache->Lookup(key2, GetHelper(), this, Cache::Priority::LOW);
ASSERT_NE(handle2, nullptr);
cache->Release(handle2);
cache.reset();
secondary_cache.reset();
}
void SplitValueIntoChunksTest() {
JemallocAllocatorOptions jopts;
std::shared_ptr<MemoryAllocator> allocator;
std::string msg;
if (JemallocNodumpAllocator::IsSupported(&msg)) {
Status s = NewJemallocNodumpAllocator(jopts, &allocator);
if (!s.ok()) {
ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
}
} else {
ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
}
using CacheValueChunk = CompressedSecondaryCache::CacheValueChunk;
std::unique_ptr<CompressedSecondaryCache> sec_cache =
std::make_unique<CompressedSecondaryCache>(
CompressedSecondaryCacheOptions(1000, 0, true, 0.5, 0.0,
allocator));
Random rnd(301);
// 8500 = 8169 + 233 + 98, so there should be 3 chunks after split.
size_t str_size{8500};
std::string str = rnd.RandomString(static_cast<int>(str_size));
size_t charge{0};
CacheValueChunk* chunks_head =
sec_cache->SplitValueIntoChunks(str, kLZ4Compression, charge);
ASSERT_EQ(charge, str_size + 3 * (sizeof(CacheValueChunk) - 1));
CacheValueChunk* current_chunk = chunks_head;
ASSERT_EQ(current_chunk->size, 8192 - sizeof(CacheValueChunk) + 1);
current_chunk = current_chunk->next;
ASSERT_EQ(current_chunk->size, 256 - sizeof(CacheValueChunk) + 1);
current_chunk = current_chunk->next;
ASSERT_EQ(current_chunk->size, 98);
sec_cache->GetHelper(true)->del_cb(chunks_head, /*alloc*/ nullptr);
}
void MergeChunksIntoValueTest() {
using CacheValueChunk = CompressedSecondaryCache::CacheValueChunk;
Random rnd(301);
size_t size1{2048};
std::string str1 = rnd.RandomString(static_cast<int>(size1));
CacheValueChunk* current_chunk = reinterpret_cast<CacheValueChunk*>(
new char[sizeof(CacheValueChunk) - 1 + size1]);
CacheValueChunk* chunks_head = current_chunk;
memcpy(current_chunk->data, str1.data(), size1);
current_chunk->size = size1;
size_t size2{256};
std::string str2 = rnd.RandomString(static_cast<int>(size2));
current_chunk->next = reinterpret_cast<CacheValueChunk*>(
new char[sizeof(CacheValueChunk) - 1 + size2]);
current_chunk = current_chunk->next;
memcpy(current_chunk->data, str2.data(), size2);
current_chunk->size = size2;
size_t size3{31};
std::string str3 = rnd.RandomString(static_cast<int>(size3));
current_chunk->next = reinterpret_cast<CacheValueChunk*>(
new char[sizeof(CacheValueChunk) - 1 + size3]);
current_chunk = current_chunk->next;
memcpy(current_chunk->data, str3.data(), size3);
current_chunk->size = size3;
current_chunk->next = nullptr;
std::string str = str1 + str2 + str3;
std::unique_ptr<CompressedSecondaryCache> sec_cache =
std::make_unique<CompressedSecondaryCache>(
CompressedSecondaryCacheOptions(1000, 0, true, 0.5, 0.0));
size_t charge{0};
CacheAllocationPtr value =
sec_cache->MergeChunksIntoValue(chunks_head, charge);
ASSERT_EQ(charge, size1 + size2 + size3);
std::string value_str{value.get(), charge};
ASSERT_EQ(strcmp(value_str.data(), str.data()), 0);
while (chunks_head != nullptr) {
CacheValueChunk* tmp_chunk = chunks_head;
chunks_head = chunks_head->next;
tmp_chunk->Free();
}
}
void SplictValueAndMergeChunksTest() {
JemallocAllocatorOptions jopts;
std::shared_ptr<MemoryAllocator> allocator;
std::string msg;
if (JemallocNodumpAllocator::IsSupported(&msg)) {
Status s = NewJemallocNodumpAllocator(jopts, &allocator);
if (!s.ok()) {
ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
}
} else {
ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
}
using CacheValueChunk = CompressedSecondaryCache::CacheValueChunk;
std::unique_ptr<CompressedSecondaryCache> sec_cache =
std::make_unique<CompressedSecondaryCache>(
CompressedSecondaryCacheOptions(1000, 0, true, 0.5, 0.0,
allocator));
Random rnd(301);
// 8500 = 8169 + 233 + 98, so there should be 3 chunks after split.
size_t str_size{8500};
std::string str = rnd.RandomString(static_cast<int>(str_size));
size_t charge{0};
CacheValueChunk* chunks_head =
sec_cache->SplitValueIntoChunks(str, kLZ4Compression, charge);
ASSERT_EQ(charge, str_size + 3 * (sizeof(CacheValueChunk) - 1));
CacheAllocationPtr value =
sec_cache->MergeChunksIntoValue(chunks_head, charge);
ASSERT_EQ(charge, str_size);
std::string value_str{value.get(), charge};
ASSERT_EQ(strcmp(value_str.data(), str.data()), 0);
sec_cache->GetHelper(true)->del_cb(chunks_head, /*alloc*/ nullptr);
}
};
class CompressedSecondaryCacheTest
: public CompressedSecondaryCacheTestBase,
public testing::WithParamInterface<std::string> {
const std::string& Type() const override { return GetParam(); }
};
INSTANTIATE_TEST_CASE_P(CompressedSecondaryCacheTest,
CompressedSecondaryCacheTest, GetTestingCacheTypes());
class CompressedSecCacheTestWithCompressAndAllocatorParam
: public CompressedSecondaryCacheTestBase,
public ::testing::WithParamInterface<
std::tuple<bool, bool, std::string>> {
public:
CompressedSecCacheTestWithCompressAndAllocatorParam() {
sec_cache_is_compressed_ = std::get<0>(GetParam());
use_jemalloc_ = std::get<1>(GetParam());
}
const std::string& Type() const override { return std::get<2>(GetParam()); }
bool sec_cache_is_compressed_;
bool use_jemalloc_;
};
TEST_P(CompressedSecCacheTestWithCompressAndAllocatorParam, BasicTes) {
BasicTest(sec_cache_is_compressed_, use_jemalloc_);
}
INSTANTIATE_TEST_CASE_P(CompressedSecCacheTests,
CompressedSecCacheTestWithCompressAndAllocatorParam,
::testing::Combine(testing::Bool(), testing::Bool(),
GetTestingCacheTypes()));
class CompressedSecondaryCacheTestWithCompressionParam
: public CompressedSecondaryCacheTestBase,
public ::testing::WithParamInterface<std::tuple<bool, std::string>> {
public:
CompressedSecondaryCacheTestWithCompressionParam() {
sec_cache_is_compressed_ = std::get<0>(GetParam());
}
const std::string& Type() const override { return std::get<1>(GetParam()); }
bool sec_cache_is_compressed_;
};
TEST_P(CompressedSecondaryCacheTestWithCompressionParam, BasicTestFromString) {
std::shared_ptr<SecondaryCache> sec_cache{nullptr};
std::string sec_cache_uri;
if (sec_cache_is_compressed_) {
if (LZ4_Supported()) {
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kLZ4Compression;"
"compress_format_version=2";
} else {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kNoCompression";
sec_cache_is_compressed_ = false;
}
Status s = SecondaryCache::CreateFromString(ConfigOptions(), sec_cache_uri,
&sec_cache);
EXPECT_OK(s);
} else {
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kNoCompression";
Status s = SecondaryCache::CreateFromString(ConfigOptions(), sec_cache_uri,
&sec_cache);
EXPECT_OK(s);
}
BasicTestHelper(sec_cache, sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam,
BasicTestFromStringWithSplit) {
std::shared_ptr<SecondaryCache> sec_cache{nullptr};
std::string sec_cache_uri;
if (sec_cache_is_compressed_) {
if (LZ4_Supported()) {
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kLZ4Compression;"
"compress_format_version=2;enable_custom_split_merge=true";
} else {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kNoCompression;"
"enable_custom_split_merge=true";
sec_cache_is_compressed_ = false;
}
Status s = SecondaryCache::CreateFromString(ConfigOptions(), sec_cache_uri,
&sec_cache);
EXPECT_OK(s);
} else {
sec_cache_uri =
"compressed_secondary_cache://"
"capacity=2048;num_shard_bits=0;compression_type=kNoCompression;"
"enable_custom_split_merge=true";
Status s = SecondaryCache::CreateFromString(ConfigOptions(), sec_cache_uri,
&sec_cache);
EXPECT_OK(s);
}
BasicTestHelper(sec_cache, sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam, FailsTest) {
FailsTest(sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam,
BasicIntegrationFailTest) {
BasicIntegrationFailTest(sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam,
IntegrationSaveFailTest) {
IntegrationSaveFailTest(sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam,
IntegrationCreateFailTest) {
IntegrationCreateFailTest(sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam,
IntegrationFullCapacityTest) {
IntegrationFullCapacityTest(sec_cache_is_compressed_);
}
TEST_P(CompressedSecondaryCacheTestWithCompressionParam, EntryRoles) {
CompressedSecondaryCacheOptions opts;
opts.capacity = 2048;
opts.num_shard_bits = 0;
if (sec_cache_is_compressed_) {
if (!LZ4_Supported()) {
ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
return;
}
} else {
opts.compression_type = CompressionType::kNoCompression;
}
// Select a random subset to include, for fast test
Random& r = *Random::GetTLSInstance();
CacheEntryRoleSet do_not_compress;
for (uint32_t i = 0; i < kNumCacheEntryRoles; ++i) {
// A few included on average, but decent chance of zero
if (r.OneIn(5)) {
do_not_compress.Add(static_cast<CacheEntryRole>(i));
}
}
opts.do_not_compress_roles = do_not_compress;
std::shared_ptr<SecondaryCache> sec_cache = NewCompressedSecondaryCache(opts);
// Fixed seed to ensure consistent compressibility (doesn't compress)
std::string junk(Random(301).RandomString(1000));
for (uint32_t i = 0; i < kNumCacheEntryRoles; ++i) {
CacheEntryRole role = static_cast<CacheEntryRole>(i);
// Uniquify `junk`
junk[0] = static_cast<char>(i);
TestItem item{junk.data(), junk.length()};
Slice ith_key = Slice(junk.data(), 16);
get_perf_context()->Reset();
ASSERT_OK(sec_cache->Insert(ith_key, &item, GetHelper(role)));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_dummy_count, 1U);
ASSERT_OK(sec_cache->Insert(ith_key, &item, GetHelper(role)));
ASSERT_EQ(get_perf_context()->compressed_sec_cache_insert_real_count, 1U);
bool kept_in_sec_cache{true};
std::unique_ptr<SecondaryCacheResultHandle> handle =
sec_cache->Lookup(ith_key, GetHelper(role), this, true,
/*advise_erase=*/true, kept_in_sec_cache);
ASSERT_NE(handle, nullptr);
// Lookup returns the right data
std::unique_ptr<TestItem> val =
std::unique_ptr<TestItem>(static_cast<TestItem*>(handle->Value()));
ASSERT_NE(val, nullptr);
ASSERT_EQ(memcmp(val->Buf(), item.Buf(), item.Size()), 0);
bool compressed =
sec_cache_is_compressed_ && !do_not_compress.Contains(role);
if (compressed) {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes,
1000);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes,
1007);
} else {
ASSERT_EQ(get_perf_context()->compressed_sec_cache_uncompressed_bytes, 0);
ASSERT_EQ(get_perf_context()->compressed_sec_cache_compressed_bytes, 0);
}
}
}
INSTANTIATE_TEST_CASE_P(CompressedSecCacheTests,
CompressedSecondaryCacheTestWithCompressionParam,
testing::Combine(testing::Bool(),
GetTestingCacheTypes()));
class CompressedSecCacheTestWithCompressAndSplitParam
: public CompressedSecondaryCacheTestBase,
public ::testing::WithParamInterface<
std::tuple<bool, bool, std::string>> {
public:
CompressedSecCacheTestWithCompressAndSplitParam() {
sec_cache_is_compressed_ = std::get<0>(GetParam());
enable_custom_split_merge_ = std::get<1>(GetParam());
}
const std::string& Type() const override { return std::get<2>(GetParam()); }
bool sec_cache_is_compressed_;
bool enable_custom_split_merge_;
};
TEST_P(CompressedSecCacheTestWithCompressAndSplitParam, BasicIntegrationTest) {
BasicIntegrationTest(sec_cache_is_compressed_, enable_custom_split_merge_);
}
INSTANTIATE_TEST_CASE_P(CompressedSecCacheTests,
CompressedSecCacheTestWithCompressAndSplitParam,
::testing::Combine(testing::Bool(), testing::Bool(),
GetTestingCacheTypes()));
TEST_P(CompressedSecondaryCacheTest, SplitValueIntoChunksTest) {
SplitValueIntoChunksTest();
}
TEST_P(CompressedSecondaryCacheTest, MergeChunksIntoValueTest) {
MergeChunksIntoValueTest();
}
TEST_P(CompressedSecondaryCacheTest, SplictValueAndMergeChunksTest) {
SplictValueAndMergeChunksTest();
}
class CompressedSecCacheTestWithTiered : public ::testing::Test {
public:
CompressedSecCacheTestWithTiered() {
LRUCacheOptions lru_opts;
TieredVolatileCacheOptions opts;
lru_opts.capacity = 70 << 20;
opts.cache_opts = &lru_opts;
opts.cache_type = PrimaryCacheType::kCacheTypeLRU;
opts.comp_cache_opts.capacity = 30 << 20;
cache_ = NewTieredVolatileCache(opts);
cache_res_mgr_ =
std::make_shared<CacheReservationManagerImpl<CacheEntryRole::kMisc>>(
cache_);
}
protected:
CacheReservationManager* cache_res_mgr() { return cache_res_mgr_.get(); }
Cache* GetCache() {
return static_cast_with_check<CacheWithSecondaryAdapter, Cache>(
cache_.get())
->TEST_GetCache();
}
SecondaryCache* GetSecondaryCache() {
return static_cast_with_check<CacheWithSecondaryAdapter, Cache>(
cache_.get())
->TEST_GetSecondaryCache();
}
size_t GetPercent(size_t val, unsigned int percent) {
return static_cast<size_t>(val * percent / 100);
}
private:
std::shared_ptr<Cache> cache_;
std::shared_ptr<CacheReservationManager> cache_res_mgr_;
};
bool CacheUsageWithinBounds(size_t val1, size_t val2, size_t error) {
return ((val1 < (val2 + error)) && (val1 > (val2 - error)));
}
TEST_F(CompressedSecCacheTestWithTiered, CacheReservationManager) {
CompressedSecondaryCache* sec_cache =
reinterpret_cast<CompressedSecondaryCache*>(GetSecondaryCache());
// Use EXPECT_PRED3 instead of EXPECT_NEAR to void too many size_t to
// double explicit casts
EXPECT_PRED3(CacheUsageWithinBounds, GetCache()->GetUsage(), (30 << 20),
GetPercent(30 << 20, 1));
EXPECT_EQ(sec_cache->TEST_GetUsage(), 0);
ASSERT_OK(cache_res_mgr()->UpdateCacheReservation(10 << 20));
EXPECT_PRED3(CacheUsageWithinBounds, GetCache()->GetUsage(), (37 << 20),
GetPercent(37 << 20, 1));
EXPECT_PRED3(CacheUsageWithinBounds, sec_cache->TEST_GetUsage(), (3 << 20),
GetPercent(3 << 20, 1));
ASSERT_OK(cache_res_mgr()->UpdateCacheReservation(0));
EXPECT_PRED3(CacheUsageWithinBounds, GetCache()->GetUsage(), (30 << 20),
GetPercent(30 << 20, 1));
EXPECT_EQ(sec_cache->TEST_GetUsage(), 0);
}
TEST_F(CompressedSecCacheTestWithTiered,
CacheReservationManagerMultipleUpdate) {
CompressedSecondaryCache* sec_cache =
reinterpret_cast<CompressedSecondaryCache*>(GetSecondaryCache());
EXPECT_PRED3(CacheUsageWithinBounds, GetCache()->GetUsage(), (30 << 20),
GetPercent(30 << 20, 1));
EXPECT_EQ(sec_cache->TEST_GetUsage(), 0);
int i;
for (i = 0; i < 10; ++i) {
ASSERT_OK(cache_res_mgr()->UpdateCacheReservation((1 + i) << 20));
}
EXPECT_PRED3(CacheUsageWithinBounds, GetCache()->GetUsage(), (37 << 20),
GetPercent(37 << 20, 1));
EXPECT_PRED3(CacheUsageWithinBounds, sec_cache->TEST_GetUsage(), (3 << 20),
GetPercent(3 << 20, 1));
for (i = 10; i > 0; --i) {
ASSERT_OK(cache_res_mgr()->UpdateCacheReservation(((i - 1) << 20)));
}
EXPECT_PRED3(CacheUsageWithinBounds, GetCache()->GetUsage(), (30 << 20),
GetPercent(30 << 20, 1));
EXPECT_EQ(sec_cache->TEST_GetUsage(), 0);
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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