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gemm3 perf test: user CUDA, SYCL, or HIP device for kokkos:initialize #2058

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Dec 6, 2023
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gemm3 perf test: user CUDA, SYCL, or HIP device for kokkos:initialize #2058

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14 changes: 13 additions & 1 deletion perf_test/blas/blas3/KokkosBlas3_gemm_standalone_perf_test_benchmark.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -142,7 +142,19 @@ void run(const blas3_gemm_params& params) {
int main(int argc, char** argv) {
const auto params = blas3_gemm_params::get_params(argc, argv);
const int num_threads = params.use_openmp;
const int device_id = params.use_cuda - 1;

// the common parameter parser takes the requested device ID and
// adds 1 to it (e.g. --cuda 0 -> params.use_cuda = 1)
// this is presumably so that 0 can be a sentinel value,
// even though device ID 0 is valid
// here, we use CUDA, SYCL, or HIP, whichever is set first, to
// choose which device Kokkos should initialize on
// or -1, for no such selection
const int device_id =
params.use_cuda
? params.use_cuda - 1
: (params.use_sycl ? params.use_sycl - 1
: (params.use_hip ? params.use_hip - 1 : -1));

Kokkos::initialize(Kokkos::InitializationSettings()
.set_num_threads(num_threads)
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