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cmd/trace: generate jsontrace data in a streaming fashion

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Update #21870

The Sys went down to 4.25G from 6.2G.

$ DEBUG_MEMORY_USAGE=1 go tool trace trace.out
2018/03/07 08:49:01 Parsing trace...
after parsing trace
 Alloc:	3385757184 Bytes
 Sys:	3661195896 Bytes
 HeapReleased:	0 Bytes
 HeapSys:	3488841728 Bytes
 HeapInUse:	3426516992 Bytes
 HeapAlloc:	3385757184 Bytes
Enter to continue...
2018/03/07 08:49:18 Splitting trace...
after spliting trace
 Alloc:	2352071904 Bytes
 Sys:	4243825464 Bytes
 HeapReleased:	0 Bytes
 HeapSys:	4025712640 Bytes
 HeapInUse:	2377703424 Bytes
 HeapAlloc:	2352071904 Bytes
Enter to continue...
after httpJsonTrace
 Alloc:	3228697832 Bytes
 Sys:	4250379064 Bytes
 HeapReleased:	0 Bytes
 HeapSys:	4025647104 Bytes
 HeapInUse:	3260014592 Bytes
 HeapAlloc:	3228697832 Bytes

Change-Id: I546f26bdbc68b1e58f1af1235a0e299dc0ff115e
Reviewed-on: https://go-review.googlesource.com/92375
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: Peter Weinberger <pjw@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Hana Kim 2018-02-06 14:34:32 -05:00 • committed by Hyang-Ah Hana Kim
parent 083f3957b8
commit ee465831ec
4 changed files with 217 additions and 108 deletions
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19
src/cmd/trace/trace_unix_test.go
View file

@ -9,6 +9,7 @@ package main
import (
"bytes"
"internal/trace"
"io/ioutil"
"runtime"
rtrace "runtime/trace"
"sync"
@ -79,14 +80,8 @@ func TestGoroutineInSyscall(t *testing.T) {
// Check only one thread for the pipe read goroutine is
// considered in-syscall.
viewerData, err := generateTrace(&traceParams{
parsed: res,
endTime: int64(1<<63 - 1),
})
if err != nil {
t.Fatalf("failed to generate ViewerData: %v", err)
}
for _, ev := range viewerData.Events {
c := viewerDataTraceConsumer(ioutil.Discard, 0, 1<<63-1)
c.consumeViewerEvent = func(ev *ViewerEvent, _ bool) {
if ev.Name == "Threads" {
arg := ev.Arg.(*threadCountersArg)
if arg.InSyscall > 1 {
@ -94,4 +89,12 @@ func TestGoroutineInSyscall(t *testing.T) {
}
}
}
param := &traceParams{
parsed: res,
endTime: int64(1<<63 - 1),
}
if err := generateTrace(param, c); err != nil {
t.Fatalf("failed to generate ViewerData: %v", err)
}
}