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Reduce GEMV and TRSM benchmark sizes for faster routine runs

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libeigen/eigen!2163

Co-authored-by: Rasmus Munk Larsen <rmlarsen@gmail.com>
This commit is contained in:
Rasmus Munk Larsen
2026-02-20 00:56:57 -08:00
parent 2c898e8b95
commit 374fe225bf
2 changed files with 12 additions and 20 deletions
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19
benchmarks/benchGemv.cpp
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@@ -117,23 +117,23 @@ static void BM_GemvAdj(benchmark::State& state) {
static void GemvSizes(::benchmark::Benchmark* b) {
// Square matrices: exercises balanced kernel behavior.
for (int size : {8, 16, 32, 64, 128, 256, 512, 1024, 4096}) {
for (int size : {8, 32, 128, 512, 1024}) {
b->Args({size, size});
}
// Tall-thin (m >> n): in ColMajor kernel, the inner vectorized loop over rows
// is long while the outer column loop is short. In RowMajor kernel (transpose),
// there are many rows to process but short dot products.
for (int n : {1, 4, 16, 64}) {
for (int m : {256, 1024, 4096}) {
if (m != n) b->Args({m, n});
for (int n : {1, 16}) {
for (int m : {256, 1024}) {
b->Args({m, n});
}
}
// Short-wide (m << n): in ColMajor kernel, the outer column loop is long but
// the inner vectorized loop over rows is short. In RowMajor kernel (transpose),
// there are few rows but long dot products.
for (int m : {1, 4, 16, 64}) {
for (int n : {256, 1024, 4096}) {
if (m != n) b->Args({m, n});
for (int m : {1, 16}) {
for (int n : {256, 1024}) {
b->Args({m, n});
}
}
}
@@ -149,12 +149,9 @@ BENCHMARK(BM_GemvTrans<float>)->Apply(GemvSizes)->Name("GemvTrans_float");
BENCHMARK(BM_GemvTrans<double>)->Apply(GemvSizes)->Name("GemvTrans_double");
// Complex types: all four variants exercise distinct kernel code paths.
// Only cfloat is benchmarked since cdouble exercises the same paths but slower.
BENCHMARK(BM_Gemv<std::complex<float>>)->Apply(GemvSizes)->Name("Gemv_cfloat");
BENCHMARK(BM_Gemv<std::complex<double>>)->Apply(GemvSizes)->Name("Gemv_cdouble");
BENCHMARK(BM_GemvTrans<std::complex<float>>)->Apply(GemvSizes)->Name("GemvTrans_cfloat");
BENCHMARK(BM_GemvTrans<std::complex<double>>)->Apply(GemvSizes)->Name("GemvTrans_cdouble");
BENCHMARK(BM_GemvConj<std::complex<float>>)->Apply(GemvSizes)->Name("GemvConj_cfloat");
BENCHMARK(BM_GemvConj<std::complex<double>>)->Apply(GemvSizes)->Name("GemvConj_cdouble");
BENCHMARK(BM_GemvAdj<std::complex<float>>)->Apply(GemvSizes)->Name("GemvAdj_cfloat");
BENCHMARK(BM_GemvAdj<std::complex<double>>)->Apply(GemvSizes)->Name("GemvAdj_cdouble");