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| author | Ian Lance Taylor <ian@gcc.gnu.org> | 2011-09-16 15:47:21 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2011-09-16 15:47:21 +0000 |
| commit | adb0401dac41c81571722312d4586b2693f95aa6 (patch) | |
| tree | ea2b52e3c258d6b6d9356977c683c7f72a4a5fd5 /libgo/go/runtime/proc_test.go | |
| parent | 5548ca3540bccbc908a45942896d635ea5f1c23f (diff) | |
| download | gcc-adb0401dac41c81571722312d4586b2693f95aa6.zip gcc-adb0401dac41c81571722312d4586b2693f95aa6.tar.gz gcc-adb0401dac41c81571722312d4586b2693f95aa6.tar.bz2 | |
Update Go library to r60.
From-SVN: r178910
Diffstat (limited to 'libgo/go/runtime/proc_test.go')
| -rw-r--r-- | libgo/go/runtime/proc_test.go | 92 |
1 files changed, 89 insertions, 3 deletions
diff --git a/libgo/go/runtime/proc_test.go b/libgo/go/runtime/proc_test.go index a15b2d8..1d20a58 100644 --- a/libgo/go/runtime/proc_test.go +++ b/libgo/go/runtime/proc_test.go @@ -6,6 +6,7 @@ package runtime_test import ( "runtime" + "sync/atomic" "testing" ) @@ -24,20 +25,105 @@ func TestStopTheWorldDeadlock(t *testing.T) { t.Logf("skipping during short test") return } - runtime.GOMAXPROCS(3) - compl := make(chan int, 1) + maxprocs := runtime.GOMAXPROCS(3) + compl := make(chan bool, 2) go func() { for i := 0; i != 1000; i += 1 { runtime.GC() } - compl <- 0 + compl <- true }() go func() { for i := 0; i != 1000; i += 1 { runtime.GOMAXPROCS(3) } + compl <- true }() go perpetuumMobile() <-compl + <-compl stop <- true + runtime.GOMAXPROCS(maxprocs) +} + +func stackGrowthRecursive(i int) { + var pad [128]uint64 + if i != 0 && pad[0] == 0 { + stackGrowthRecursive(i - 1) + } +} + +func BenchmarkStackGrowth(b *testing.B) { + const CallsPerSched = 1000 + procs := runtime.GOMAXPROCS(-1) + N := int32(b.N / CallsPerSched) + c := make(chan bool, procs) + for p := 0; p < procs; p++ { + go func() { + for atomic.AddInt32(&N, -1) >= 0 { + runtime.Gosched() + for g := 0; g < CallsPerSched; g++ { + stackGrowthRecursive(10) + } + } + c <- true + }() + } + for p := 0; p < procs; p++ { + <-c + } +} + +/* These benchmarks are meaningless for gccgo. + +func BenchmarkSyscall(b *testing.B) { + const CallsPerSched = 1000 + procs := runtime.GOMAXPROCS(-1) + N := int32(b.N / CallsPerSched) + c := make(chan bool, procs) + for p := 0; p < procs; p++ { + go func() { + for atomic.AddInt32(&N, -1) >= 0 { + runtime.Gosched() + for g := 0; g < CallsPerSched; g++ { + runtime.Entersyscall() + runtime.Exitsyscall() + } + } + c <- true + }() + } + for p := 0; p < procs; p++ { + <-c + } } + +func BenchmarkSyscallWork(b *testing.B) { + const CallsPerSched = 1000 + const LocalWork = 100 + procs := runtime.GOMAXPROCS(-1) + N := int32(b.N / CallsPerSched) + c := make(chan bool, procs) + for p := 0; p < procs; p++ { + go func() { + foo := 42 + for atomic.AddInt32(&N, -1) >= 0 { + runtime.Gosched() + for g := 0; g < CallsPerSched; g++ { + runtime.Entersyscall() + for i := 0; i < LocalWork; i++ { + foo *= 2 + foo /= 2 + } + runtime.Exitsyscall() + } + } + c <- foo == 42 + }() + } + for p := 0; p < procs; p++ { + <-c + } +} + +*/ |