From 5a5e698c8fceec38c34f86375dcd44fb1a7a8939 Mon Sep 17 00:00:00 2001 From: Dmitriy Vyukov Date: Wed, 27 Jun 2012 21:57:49 +0400 Subject: [PATCH] runtime: add goroutine creation benchmark Current results on 2 core darwin/amd64: BenchmarkGoroutineChain 351 ns/op BenchmarkGoroutineChain-2 3840 ns/op BenchmarkGoroutineChain-4 4040 ns/op BenchmarkConcGoroutineChain 350 ns/op BenchmarkConcGoroutineChain-2 875 ns/op BenchmarkConcGoroutineChain-4 2027 ns/op R=r, rsc CC=golang-dev https://golang.org/cl/6332054 --- src/pkg/runtime/proc_test.go | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/src/pkg/runtime/proc_test.go b/src/pkg/runtime/proc_test.go index 32111080a5..1d51c5271e 100644 --- a/src/pkg/runtime/proc_test.go +++ b/src/pkg/runtime/proc_test.go @@ -123,3 +123,29 @@ func BenchmarkSyscallWork(b *testing.B) { <-c } } + +func BenchmarkCreateGoroutines(b *testing.B) { + benchmarkCreateGoroutines(b, 1) +} + +func BenchmarkCreateGoroutinesParallel(b *testing.B) { + benchmarkCreateGoroutines(b, runtime.GOMAXPROCS(-1)) +} + +func benchmarkCreateGoroutines(b *testing.B, procs int) { + c := make(chan bool) + var f func(n int) + f = func(n int) { + if n == 0 { + c <- true + return + } + go f(n - 1) + } + for i := 0; i < procs; i++ { + go f(b.N / procs) + } + for i := 0; i < procs; i++ { + <-c + } +}