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Fix ThreadCPUUsage when running on RTEMS. (#414)

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Change ThreadCPUUsage to call ProcessCPUUsage if __rtems__ is defined.

RTEMS real time OS doesn't support CLOCK_THREAD_CPUTIME_ID. See
https://github.com/RTEMS/rtems/blob/master/cpukit/posix/src/clockgettime.c#L58-L59

Prior to this change, ThreadCPUUsage would fail when running on RTEMS with:
  ERROR: clock_gettime(CLOCK_THREAD_CPUTIME_ID, ...) failed
This commit is contained in:
Tom Madams 2017-07-06 15:59:13 -07:00 committed by Dominic Hamon
parent 9d4b719dae
commit ee3cfca651
3 changed files with 7 additions and 0 deletions
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1
CONTRIBUTORS
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@ -51,6 +51,7 @@ Pierre Phaneuf <pphaneuf@google.com>
Radoslav Yovchev <radoslav.tm@gmail.com> Radoslav Yovchev <radoslav.tm@gmail.com>
Ray Glover <ray.glover@uk.ibm.com> Ray Glover <ray.glover@uk.ibm.com>
Shuo Chen <chenshuo@chenshuo.com> Shuo Chen <chenshuo@chenshuo.com>
Tom Madams <tom.ej.madams@gmail.com> <tmadams@google.com>
Yixuan Qiu <yixuanq@gmail.com> Yixuan Qiu <yixuanq@gmail.com>
Yusuke Suzuki <utatane.tea@gmail.com> Yusuke Suzuki <utatane.tea@gmail.com>
Tobias Ulvgård <tobias.ulvgard@dirac.se> Tobias Ulvgård <tobias.ulvgard@dirac.se>

2
src/internal_macros.h
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@ -45,6 +45,8 @@
#define BENCHMARK_OS_NACL 1 #define BENCHMARK_OS_NACL 1
#elif defined(EMSCRIPTEN) #elif defined(EMSCRIPTEN)
#define BENCHMARK_OS_EMSCRIPTEN 1 #define BENCHMARK_OS_EMSCRIPTEN 1
#elif defined(__rtems__)
#define BENCHMARK_OS_RTEMS 1
#endif #endif
#if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \ #if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \

4
src/timers.cc
View file

@ -158,6 +158,10 @@ double ThreadCPUUsage() {
#elif defined(BENCHMARK_OS_EMSCRIPTEN) #elif defined(BENCHMARK_OS_EMSCRIPTEN)
// Emscripten doesn't support traditional threads // Emscripten doesn't support traditional threads
return ProcessCPUUsage(); return ProcessCPUUsage();
#elif defined(BENCHMARK_OS_RTEMS)
// RTEMS doesn't support CLOCK_THREAD_CPUTIME_ID. See
// https://github.com/RTEMS/rtems/blob/master/cpukit/posix/src/clockgettime.c
return ProcessCPUUsage();
#elif defined(CLOCK_THREAD_CPUTIME_ID) #elif defined(CLOCK_THREAD_CPUTIME_ID)
struct timespec ts; struct timespec ts;
if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) return MakeTime(ts); if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) return MakeTime(ts);