A starting point for writing and building Google Benchmarks of both CUDA and CPU code.
An example CPU benchmark is located in benchmarks/example/example_benchmark.cpp.
To build this benchmark:
mkdir -p build
cd build
cmake .. && makeTo run this benchmark:
./gbenchmarks/EXAMPLE_BENCHExample output:
~/example_cuda_benchmark/build$ ./gbenchmarks/EXAMPLE_BENCH
2020-06-25T09:38:23-05:00
Running ./gbenchmarks/EXAMPLE_BENCH
Run on (20 X 4500 MHz CPU s)
CPU Caches:
L1 Data 32 KiB (x10)
L1 Instruction 32 KiB (x10)
L2 Unified 1024 KiB (x10)
L3 Unified 14080 KiB (x1)
Load Average: 1.14, 0.79, 0.67
***WARNING*** CPU scaling is enabled, the benchmark real time measurements may be noisy and will incur extra overhead.
-------------------------------------------------------------------------------
Benchmark Time CPU Iterations
-------------------------------------------------------------------------------
BM_test 0.000 ns 0.000 ns 1000000000
BM_StringCopy 4.23 ns 4.23 ns 139185384
BM_StringCompare/1024 21.5 ns 21.5 ns 32624809
BM_StringCompare/2048 39.3 ns 39.3 ns 17823169
BM_StringCompare/4096 73.4 ns 73.4 ns 9546744
BM_StringCompare/8192 147 ns 147 ns 4754180
BM_StringCompare/16384 308 ns 308 ns 2282049
BM_StringCompare/32768 865 ns 865 ns 845382
BM_StringCompare/65536 1542 ns 1541 ns 447876
BM_StringCompare/131072 3136 ns 3136 ns 215387
BM_StringCompare/262144 6005 ns 6005 ns 115466
BM_StringCompare_BigO 0.02 N 0.02 N
BM_StringCompare_RMS 5 % 5 %
BM_Sequential<std::vector<int>>/1 5.36 ns 5.36 ns 109825554 bytes_per_second=177.79M/s
BM_Sequential<std::vector<int>>/8 50.8 ns 50.8 ns 10000000 bytes_per_second=150.11M/s
BM_Sequential<std::vector<int>>/64 420 ns 420 ns 2283232 bytes_per_second=145.212M/s
BM_Sequential<std::vector<int>>/512 2504 ns 2504 ns 252367 bytes_per_second=194.988M/s
BM_Sequential<std::vector<int>>/1024 5119 ns 5119 ns 115397 bytes_per_second=190.757M/s
To add a new benchmark:
-
Add a new
*.cppor*.cufile to thebenchmarks/directory. -
Update the
benchmarks/CMakeLists.txtto point to the new benchmark, e.g.,
set(MY_NEW_BENCH_SRC
"${CMAKE_CURRENT_SOURCE_DIR}/*my_new_bench_dir*/*my_new_bench.cpp/.cu*")
ConfigureBench(*MY_NEW_BENCH* "${*MY_NEW_BENCH_SRC*}"
- Follow the above build instructions and your new benchmark executable
*MY_NEW_BENCH*will be built into thebuild/gbenchmarksdirectory.
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