benchmark/cmake/Modules
Mircea Trofin 376ebc2635
Support optional, user-directed collection of performance counters (#1114)
* Support optional, user-directed collection of performance counters

The patch allows an engineer wishing to drill into the root causes
of a regression, for example. Currently, only single threaded runs
are supported. The feature is a build-time opt in, and then a runtime
opt in.

The engineer may run the benchmark executable, passing a list of
performance counter names (using libpfm's naming scheme) at the
command line. The counter values will then be collected and reported
back as UserCounters.

This is different from #240 in that it is a benchmark user opt-in, and
the counter collection is transparent to the benchmark.

Currently, this is only supported on platforms where libpfm is
supported.

libpfm: http://perfmon2.sourceforge.net/

* 'Use' values param in Snapshot when BENCHMARK_OS_WINDOWS

This is to avoid unused parameter warning-as-error

* Added missing include for <vector> in perf_counters.cc

* Moved doc to docs

* Added license blurbs
2021-04-28 09:25:29 +01:00
..
FindLLVMAr.cmake CMake: implement LTO for clang. Fixes #478 (#487) 2017-11-29 12:48:43 -08:00
FindLLVMNm.cmake CMake: implement LTO for clang. Fixes #478 (#487) 2017-11-29 12:48:43 -08:00
FindLLVMRanLib.cmake CMake: implement LTO for clang. Fixes #478 (#487) 2017-11-29 12:48:43 -08:00
FindPFM.cmake Support optional, user-directed collection of performance counters (#1114) 2021-04-28 09:25:29 +01:00