diff options
Diffstat (limited to 'libgo/go/runtime/pprof/pprof_test.go')
| -rw-r--r-- | libgo/go/runtime/pprof/pprof_test.go | 147 |
1 files changed, 100 insertions, 47 deletions
diff --git a/libgo/go/runtime/pprof/pprof_test.go b/libgo/go/runtime/pprof/pprof_test.go index 52d63b2e22..1069963720 100644 --- a/libgo/go/runtime/pprof/pprof_test.go +++ b/libgo/go/runtime/pprof/pprof_test.go @@ -2,12 +2,13 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. +// +build !nacl + package pprof_test import ( "bytes" "fmt" - "hash/crc32" "math/big" "os/exec" "regexp" @@ -20,35 +21,65 @@ import ( "unsafe" ) -func TestCPUProfile(t *testing.T) { - buf := make([]byte, 100000) - testCPUProfile(t, []string{"crc32.update"}, func() { - // This loop takes about a quarter second on a 2 GHz laptop. - // We only need to get one 100 Hz clock tick, so we've got - // a 25x safety buffer. - for i := 0; i < 1000; i++ { - crc32.ChecksumIEEE(buf) +func cpuHogger(f func()) { + // We only need to get one 100 Hz clock tick, so we've got + // a 25x safety buffer. + // But do at least 500 iterations (which should take about 100ms), + // otherwise TestCPUProfileMultithreaded can fail if only one + // thread is scheduled during the 250ms period. + t0 := time.Now() + for i := 0; i < 500 || time.Since(t0) < 250*time.Millisecond; i++ { + f() + } +} + +var ( + salt1 = 0 + salt2 = 0 +) + +// The actual CPU hogging function. +// Must not call other functions nor access heap/globals in the loop, +// otherwise under race detector the samples will be in the race runtime. +func cpuHog1() { + foo := salt1 + for i := 0; i < 1e5; i++ { + if foo > 0 { + foo *= foo + } else { + foo *= foo + 1 } + } + salt1 = foo +} + +func cpuHog2() { + foo := salt2 + for i := 0; i < 1e5; i++ { + if foo > 0 { + foo *= foo + } else { + foo *= foo + 2 + } + } + salt2 = foo +} + +func TestCPUProfile(t *testing.T) { + testCPUProfile(t, []string{"pprof_test.cpuHog1"}, func() { + cpuHogger(cpuHog1) }) } func TestCPUProfileMultithreaded(t *testing.T) { - buf := make([]byte, 100000) defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(2)) - testCPUProfile(t, []string{"crc32.update"}, func() { + testCPUProfile(t, []string{"pprof_test.cpuHog1", "pprof_test.cpuHog2"}, func() { c := make(chan int) go func() { - for i := 0; i < 2000; i++ { - crc32.Update(0, crc32.IEEETable, buf) - } + cpuHogger(cpuHog1) c <- 1 }() - // This loop takes about a quarter second on a 2 GHz laptop. - // We only need to get one 100 Hz clock tick, so we've got - // a 25x safety buffer. - for i := 0; i < 2000; i++ { - crc32.ChecksumIEEE(buf) - } + cpuHogger(cpuHog2) <-c }) } @@ -108,7 +139,7 @@ func testCPUProfile(t *testing.T, need []string, f func()) { f() StopCPUProfile() - // Check that profile is well formed and contains ChecksumIEEE. + // Check that profile is well formed and contains need. have := make([]uintptr, len(need)) parseProfile(t, prof.Bytes(), func(count uintptr, stk []uintptr) { for _, pc := range stk { @@ -116,6 +147,7 @@ func testCPUProfile(t *testing.T, need []string, f func()) { if f == nil { continue } + t.Log(f.Name(), count) for i, name := range need { if strings.Contains(f.Name(), name) { have[i] += count @@ -138,7 +170,11 @@ func testCPUProfile(t *testing.T, need []string, f func()) { t.Logf("no CPU profile samples collected") ok = false } - min := total / uintptr(len(have)) / 3 + // We'd like to check a reasonable minimum, like + // total / len(have) / smallconstant, but this test is + // pretty flaky (see bug 7095). So we'll just test to + // make sure we got at least one sample. + min := uintptr(1) for i, name := range need { if have[i] < min { t.Logf("%s has %d samples out of %d, want at least %d, ideally %d", name, have[i], total, min, total/uintptr(len(have))) @@ -189,9 +225,6 @@ func TestCPUProfileWithFork(t *testing.T) { // If it did, it would see inconsistent state and would either record an incorrect stack // or crash because the stack was malformed. func TestGoroutineSwitch(t *testing.T) { - if runtime.GOOS == "windows" { - t.Skip("flaky test; see http://golang.org/issue/6417") - } // How much to try. These defaults take about 1 seconds // on a 2012 MacBook Pro. The ones in short mode take // about 0.1 seconds. @@ -217,7 +250,7 @@ func TestGoroutineSwitch(t *testing.T) { // exists to record a PC without a traceback. Those are okay. if len(stk) == 2 { f := runtime.FuncForPC(stk[1]) - if f != nil && f.Name() == "System" { + if f != nil && (f.Name() == "System" || f.Name() == "ExternalCode" || f.Name() == "GC") { return } } @@ -264,9 +297,9 @@ func TestMathBigDivide(t *testing.T) { // Operating systems that are expected to fail the tests. See issue 6047. var badOS = map[string]bool{ - "darwin": true, - "netbsd": true, - "openbsd": true, + "darwin": true, + "netbsd": true, + "plan9": true, } func TestBlockProfile(t *testing.T) { @@ -279,39 +312,45 @@ func TestBlockProfile(t *testing.T) { tests := [...]TestCase{ {"chan recv", blockChanRecv, ` [0-9]+ [0-9]+ @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ -# 0x[0-9,a-f]+ runtime\.chanrecv1\+0x[0-9,a-f]+ .*/src/pkg/runtime/chan.c:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.blockChanRecv\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime\.chanrecv1\+0x[0-9,a-f]+ .*/src/runtime/chan.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.blockChanRecv\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ `}, {"chan send", blockChanSend, ` [0-9]+ [0-9]+ @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ -# 0x[0-9,a-f]+ runtime\.chansend1\+0x[0-9,a-f]+ .*/src/pkg/runtime/chan.c:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.blockChanSend\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime\.chansend1\+0x[0-9,a-f]+ .*/src/runtime/chan.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.blockChanSend\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ `}, {"chan close", blockChanClose, ` [0-9]+ [0-9]+ @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ -# 0x[0-9,a-f]+ runtime\.chanrecv1\+0x[0-9,a-f]+ .*/src/pkg/runtime/chan.c:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.blockChanClose\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime\.chanrecv1\+0x[0-9,a-f]+ .*/src/runtime/chan.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.blockChanClose\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ `}, {"select recv async", blockSelectRecvAsync, ` [0-9]+ [0-9]+ @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ -# 0x[0-9,a-f]+ runtime\.selectgo\+0x[0-9,a-f]+ .*/src/pkg/runtime/chan.c:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.blockSelectRecvAsync\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime\.selectgo\+0x[0-9,a-f]+ .*/src/runtime/select.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.blockSelectRecvAsync\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ `}, {"select send sync", blockSelectSendSync, ` [0-9]+ [0-9]+ @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ -# 0x[0-9,a-f]+ runtime\.selectgo\+0x[0-9,a-f]+ .*/src/pkg/runtime/chan.c:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.blockSelectSendSync\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime\.selectgo\+0x[0-9,a-f]+ .*/src/runtime/select.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.blockSelectSendSync\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ `}, {"mutex", blockMutex, ` [0-9]+ [0-9]+ @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ -# 0x[0-9,a-f]+ sync\.\(\*Mutex\)\.Lock\+0x[0-9,a-f]+ .*/src/pkg/sync/mutex\.go:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.blockMutex\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ -# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/pkg/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ sync\.\(\*Mutex\)\.Lock\+0x[0-9,a-f]+ .*/src/sync/mutex\.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.blockMutex\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ +`}, + {"cond", blockCond, ` +[0-9]+ [0-9]+ @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ +# 0x[0-9,a-f]+ sync\.\(\*Cond\)\.Wait\+0x[0-9,a-f]+ .*/src/sync/cond\.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.blockCond\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ +# 0x[0-9,a-f]+ runtime/pprof_test\.TestBlockProfile\+0x[0-9,a-f]+ .*/src/runtime/pprof/pprof_test.go:[0-9]+ `}, } @@ -399,3 +438,17 @@ func blockMutex() { }() mu.Lock() } + +func blockCond() { + var mu sync.Mutex + c := sync.NewCond(&mu) + mu.Lock() + go func() { + time.Sleep(blockDelay) + mu.Lock() + c.Signal() + mu.Unlock() + }() + c.Wait() + mu.Unlock() +} |