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runtime: add goroutine creation benchmark

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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
This commit is contained in:
Dmitriy Vyukov 2012-06-27 21:57:49 +04:00
parent 809e06babc
commit 5a5e698c8f
1 changed files with 26 additions and 0 deletions
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26
src/pkg/runtime/proc_test.go
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@ -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
}
}