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path: root/libgo/go/runtime/pprof/pprof_test.go
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Diffstat (limited to 'libgo/go/runtime/pprof/pprof_test.go')
-rw-r--r--libgo/go/runtime/pprof/pprof_test.go130
1 files changed, 90 insertions, 40 deletions
diff --git a/libgo/go/runtime/pprof/pprof_test.go b/libgo/go/runtime/pprof/pprof_test.go
index f714472fd55..10699637205 100644
--- a/libgo/go/runtime/pprof/pprof_test.go
+++ b/libgo/go/runtime/pprof/pprof_test.go
@@ -9,7 +9,6 @@ package pprof_test
import (
"bytes"
"fmt"
- "hash/crc32"
"math/big"
"os/exec"
"regexp"
@@ -22,35 +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
})
}
@@ -110,7 +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 {
@@ -118,6 +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
@@ -220,7 +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" || f.Name() == "ExternalCode") {
+ if f != nil && (f.Name() == "System" || f.Name() == "ExternalCode" || f.Name() == "GC") {
return
}
}
@@ -282,39 +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.goc:[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.goc:[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.goc:[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.goc:[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.goc:[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]+
`},
}
@@ -402,3 +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()
+}
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