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Diffstat (limited to 'libcxx/utils/google-benchmark/README.md')
| -rw-r--r-- | libcxx/utils/google-benchmark/README.md | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/libcxx/utils/google-benchmark/README.md b/libcxx/utils/google-benchmark/README.md index 0c081ff8e26..9109430984c 100644 --- a/libcxx/utils/google-benchmark/README.md +++ b/libcxx/utils/google-benchmark/README.md @@ -9,6 +9,8 @@ Discussion group: https://groups.google.com/d/forum/benchmark-discuss IRC channel: https://freenode.net #googlebenchmark +[Known issues and common problems](#known-issues) + ## Example usage ### Basic usage Define a function that executes the code to be measured. @@ -460,6 +462,24 @@ static void BM_test(benchmark::State& state) { } ``` +## Running a subset of the benchmarks + +The `--benchmark_filter=<regex>` option can be used to only run the benchmarks +which match the specified `<regex>`. For example: + +```bash +$ ./run_benchmarks.x --benchmark_filter=BM_memcpy/32 +Run on (1 X 2300 MHz CPU ) +2016-06-25 19:34:24 +Benchmark Time CPU Iterations +---------------------------------------------------- +BM_memcpy/32 11 ns 11 ns 79545455 +BM_memcpy/32k 2181 ns 2185 ns 324074 +BM_memcpy/32 12 ns 12 ns 54687500 +BM_memcpy/32k 1834 ns 1837 ns 357143 +``` + + ## Output Formats The library supports multiple output formats. Use the `--benchmark_format=<console|json|csv>` flag to set the format type. `console` @@ -567,3 +587,11 @@ Anything older *may* work. Note: Using the library and its headers in C++03 is supported. C++11 is only required to build the library. + +# Known Issues + +### Windows + +* Users must manually link `shlwapi.lib`. Failure to do so may result +in unresolved symbols. + |
