[libc++] Reduce the number of runs on the stop_token benchmarks (llvm#179914)

philnik777 · web-flow · commit 763761888f64 · 2026-02-07T11:17:05.000+01:00
Testing a bunch of sizes has relatively little value. This reduces the number of benchmarks so we can run them on a regular basis. Fixes llvm#179697
diff --git a/libcxx/test/benchmarks/stop_token.bench.cpp b/libcxx/test/benchmarks/stop_token.bench.cpp
@@ -42,7 +42,7 @@ void BM_stop_token_single_thread_polling_stop_requested(benchmark::State& state)
   }
 }
 
-BENCHMARK(BM_stop_token_single_thread_polling_stop_requested)->RangeMultiplier(2)->Range(1 << 10, 1 << 24);
+BENCHMARK(BM_stop_token_single_thread_polling_stop_requested)->Arg(1024)->Arg(131072)->Arg(16777216);
 
 // We have multiple threads polling for stop_requested of the same stop_token.
 void BM_stop_token_multi_thread_polling_stop_requested(benchmark::State& state) {
@@ -91,7 +91,7 @@ void BM_stop_token_multi_thread_polling_stop_requested(benchmark::State& state)
   ss.request_stop();
 }
 
-BENCHMARK(BM_stop_token_multi_thread_polling_stop_requested)->RangeMultiplier(2)->Range(1 << 10, 1 << 24);
+BENCHMARK(BM_stop_token_multi_thread_polling_stop_requested)->Arg(1024)->Arg(131072)->Arg(16777216);
 
 // We have a single thread created by std::jthread consuming the stop_token:
 // registering/deregistering callbacks, one at a time.
@@ -117,7 +117,7 @@ void BM_stop_token_single_thread_reg_unreg_callback(benchmark::State& state) {
     }
   }
 }
-BENCHMARK(BM_stop_token_single_thread_reg_unreg_callback)->RangeMultiplier(2)->Range(1 << 10, 1 << 24);
+BENCHMARK(BM_stop_token_single_thread_reg_unreg_callback)->Arg(1024)->Arg(131072)->Arg(16777216);
 
 // At startup, it creates a single stop_source which it will then pass an associated stop_token to every
 // request.
@@ -182,6 +182,6 @@ void BM_stop_token_async_reg_unreg_callback(benchmark::State& state) {
 
   ss.request_stop();
 }
-BENCHMARK(BM_stop_token_async_reg_unreg_callback)->RangeMultiplier(2)->Range(1 << 10, 1 << 24);
+BENCHMARK(BM_stop_token_async_reg_unreg_callback)->Arg(1024)->Arg(131072)->Arg(16777216);
 
 BENCHMARK_MAIN();

Original file line number	Diff line number	Diff line change
`@@ -42,7 +42,7 @@ void BM_stop_token_single_thread_polling_stop_requested(benchmark::State& state)`
`42`	`42`	`}`
`43`	`43`	`}`
`44`	`44`
`45`		`-BENCHMARK(BM_stop_token_single_thread_polling_stop_requested)->RangeMultiplier(2)->Range(1 << 10, 1 << 24);`
	`45`	`+BENCHMARK(BM_stop_token_single_thread_polling_stop_requested)->Arg(1024)->Arg(131072)->Arg(16777216);`
`46`	`46`
`47`	`47`	`// We have multiple threads polling for stop_requested of the same stop_token.`
`48`	`48`	`void BM_stop_token_multi_thread_polling_stop_requested(benchmark::State& state) {`
`@@ -91,7 +91,7 @@ void BM_stop_token_multi_thread_polling_stop_requested(benchmark::State& state)`
`91`	`91`	`ss.request_stop();`
`92`	`92`	`}`
`93`	`93`
`94`		`-BENCHMARK(BM_stop_token_multi_thread_polling_stop_requested)->RangeMultiplier(2)->Range(1 << 10, 1 << 24);`
	`94`	`+BENCHMARK(BM_stop_token_multi_thread_polling_stop_requested)->Arg(1024)->Arg(131072)->Arg(16777216);`
`95`	`95`
`96`	`96`	`// We have a single thread created by std::jthread consuming the stop_token:`
`97`	`97`	`// registering/deregistering callbacks, one at a time.`
`@@ -117,7 +117,7 @@ void BM_stop_token_single_thread_reg_unreg_callback(benchmark::State& state) {`
`117`	`117`	`}`
`118`	`118`	`}`
`119`	`119`	`}`
`120`		`-BENCHMARK(BM_stop_token_single_thread_reg_unreg_callback)->RangeMultiplier(2)->Range(1 << 10, 1 << 24);`
	`120`	`+BENCHMARK(BM_stop_token_single_thread_reg_unreg_callback)->Arg(1024)->Arg(131072)->Arg(16777216);`
`121`	`121`
`122`	`122`	`// At startup, it creates a single stop_source which it will then pass an associated stop_token to every`
`123`	`123`	`// request.`
`@@ -182,6 +182,6 @@ void BM_stop_token_async_reg_unreg_callback(benchmark::State& state) {`
`182`	`182`
`183`	`183`	`ss.request_stop();`
`184`	`184`	`}`
`185`		`-BENCHMARK(BM_stop_token_async_reg_unreg_callback)->RangeMultiplier(2)->Range(1 << 10, 1 << 24);`
	`185`	`+BENCHMARK(BM_stop_token_async_reg_unreg_callback)->Arg(1024)->Arg(131072)->Arg(16777216);`
`186`	`186`
`187`	`187`	`BENCHMARK_MAIN();`