[libcxx-commits] [libcxx] [libc++] Reduce the number of runs on the stop_token benchmarks (PR #179914)
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Thu Feb 5 03:42:02 PST 2026
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-libcxx
Author: Nikolas Klauser (philnik777)
<details>
<summary>Changes</summary>
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 #<!-- -->179697
---
Full diff: https://github.com/llvm/llvm-project/pull/179914.diff
1 Files Affected:
- (modified) libcxx/test/benchmarks/stop_token.bench.cpp (+4-4)
``````````diff
diff --git a/libcxx/test/benchmarks/stop_token.bench.cpp b/libcxx/test/benchmarks/stop_token.bench.cpp
index a627f80697dd5..a386c30c6c15c 100644
--- 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();
``````````
</details>
https://github.com/llvm/llvm-project/pull/179914
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