go version: go1.7rc1 linux/amd64 (from go1.7rc1.linux-amd64.tar.gz
<https://storage.googleapis.com/golang/go1.7rc1.linux-amd64.tar.gz>)
program: https://play.golang.org/p/pUyOao-V9w
pprof weblist fragment:
runtime.(*mspan).sweep
/usr/local/go/src/runtime/mgcsweep.go
Total: 10ms 110ms (flat, cum) 0.63%
161 . . // It clears the mark bits in preparation
for the next GC round.
162 . . // Returns true if the span was returned to
heap.
163 . . // If preserve=true, don't return it to
heap nor relink in MCentral lists;
164 . . // caller takes care of it.
165 . . //TODO go:nowritebarrier
166 . . func (s *mspan) sweep(preserve bool) bool {
167 . . // It's critical that we enter this
function with preemption disabled,
168 . . // GC must not start while we are in the
middle of this function.
169 . . _g_ := getg()
170 . . if _g_.m.locks == 0 && _g_.m.mallocing == 0
&& _g_ != _g_.m.g0 {
171 . . throw("MSpan_Sweep: m is not locked")
172 . . }
173 10ms 10ms sweepgen := mheap_.sweepgen
174 . . if s.state != mSpanInUse || s.sweepgen !=
sweepgen-1 {
. . 41c319: MOVQ 0xe0(SP), DX
/usr/local/go/src/runtime/mgcsweep.go:174
. . 41c321: MOVZX 0x64(DX), BX
/usr/local/go/src/runtime/mgcsweep.go:174
. . 41c325: MOVB BL, 0x29(SP)
/usr/local/go/src/runtime/mgcsweep.go:174
. . 41c329: TESTL BL, BL
/usr/local/go/src/runtime/mgcsweep.go:174
. . 41c32b: JNE 0x41cd16
/usr/local/go/src/runtime/mgcsweep.go:174
. . 41c331: MOVL 0x58(DX), SI
/usr/local/go/src/runtime/mgcsweep.go:174
. . 41c334: LEAL -0x1(CX), DI
/usr/local/go/src/runtime/mgcsweep.go:174
. . 41c337: MOVL DI, 0x34(SP)
/usr/local/go/src/runtime/mgcsweep.go:174
. . 41c33b: CMPL DI, SI
/usr/local/go/src/runtime/mgcsweep.go:174
. . 41c33d: JNE 0x41cd16
/usr/local/go/src/runtime/mgcsweep.go:174
. . *41c903: MOVQ 0xe0(SP), DX
/usr/local/go/src/runtime/mgcsweep.go:174*
. . 41c923: MOVQ 0xe0(SP), CX
/usr/local/go/src/runtime/mgcsweep.go:174
. . *41ca3d: MOVQ 0xe0(SP), DX
/usr/local/go/src/runtime/mgcsweep.go:174*
* . . 41ca4c: MOVQ 0xe0(SP), DX
/usr/local/go/src/runtime/mgcsweep.go:174*
* . . 41ca76: MOVQ 0xe0(SP), DX
/usr/local/go/src/runtime/mgcsweep.go:174*
* . . 41cabe: MOVQ 0xe0(SP), DX
/usr/local/go/src/runtime/mgcsweep.go:174*
* . . 41cb2f: MOVQ 0xe0(SP), DX
/usr/local/go/src/runtime/mgcsweep.go:174*
* . . 41cc54: MOVQ 0xe0(SP), DX
/usr/local/go/src/runtime/mgcsweep.go:174*
* . . 41cc9e: MOVQ 0xe0(SP), DX
/usr/local/go/src/runtime/mgcsweep.go:174*
* . . 41cd05: MOVQ 0xe0(SP), DX
/usr/local/go/src/runtime/mgcsweep.go:174*
. . 41cd0d: MOVL 0x34(SP), DI
/usr/local/go/src/runtime/mgcsweep.go:174
175 . . print("MSpan_Sweep: state=", s.state, "
sweepgen=", s.sweepgen, " mheap.sweepgen=", sweepgen, "\n")
176 . . throw("MSpan_Sweep: bad span state")
177 . . }
Codegen bug or I'm missing something?
--
You received this message because you are subscribed to the Google Groups
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to golang-nuts+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
