From ccd992355df7192993c666236047820244914598 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 16 Apr 2024 21:19:13 +0200 Subject: Adding upstream version 1.21.8. Signed-off-by: Daniel Baumann --- src/runtime/norace_test.go | 47 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 src/runtime/norace_test.go (limited to 'src/runtime/norace_test.go') diff --git a/src/runtime/norace_test.go b/src/runtime/norace_test.go new file mode 100644 index 0000000..3b5eca5 --- /dev/null +++ b/src/runtime/norace_test.go @@ -0,0 +1,47 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// The file contains tests that cannot run under race detector for some reason. +// +//go:build !race + +package runtime_test + +import ( + "runtime" + "testing" +) + +// Syscall tests split stack between Entersyscall and Exitsyscall under race detector. +func BenchmarkSyscall(b *testing.B) { + benchmarkSyscall(b, 0, 1) +} + +func BenchmarkSyscallWork(b *testing.B) { + benchmarkSyscall(b, 100, 1) +} + +func BenchmarkSyscallExcess(b *testing.B) { + benchmarkSyscall(b, 0, 4) +} + +func BenchmarkSyscallExcessWork(b *testing.B) { + benchmarkSyscall(b, 100, 4) +} + +func benchmarkSyscall(b *testing.B, work, excess int) { + b.SetParallelism(excess) + b.RunParallel(func(pb *testing.PB) { + foo := 42 + for pb.Next() { + runtime.Entersyscall() + for i := 0; i < work; i++ { + foo *= 2 + foo /= 2 + } + runtime.Exitsyscall() + } + _ = foo + }) +} -- cgit v1.2.3