Open zdyj3170101136 opened 2 years ago
Please answer these questions before submitting your issue. Thanks!
yangjie05-mac:awesomeProject35 jie.yang05$ go version go version go1.17.4 darwin/arm64
macos
yangjie05-mac:awesomeProject35 jie.yang05$ arch arm64
I run my code and want to get disasm from the cpuprofile.
code:
package main import ( "math/rand" "os" "runtime/pprof" "time" ) var global int func main() { f, _ := os.Create("cpu.pprof") pprof.StartCPUProfile(f) t := time.After(3 * time.Second) loop: for { select { case <-t: break loop default: global = rand.Int() } } pprof.StopCPUProfile() f.Sync() f.Close() }
script:
go build -o=bin main.go ./bin go tool pprof bin cpu.pprof disasm rand
expect to see (which i run in my macos with same code but go version 1.16)
(pprof) disasm rand Total: 2.67s ROUTINE ======================== math/rand.(*lockedSource).Int63 450ms 450ms (flat, cum) 16.85% of Total 220ms 220ms 106ce80: MOVQ GS:0x30, CX ;math/rand.(*lockedSource).Int63 rand.go:387 . . 106ce89: CMPQ 0x10(CX), SP ;rand.go:387 . . 106ce8d: JBE 0x106cf90 . . 106ce93: SUBQ $0x20, SP . . 106ce97: MOVQ BP, 0x18(SP) . . 106ce9c: LEAQ 0x18(SP), BP . . 106cea1: XORL AX, AX ;rand.go:388 . . 106cea3: MOVQ 0x28(SP), DX . . 106cea8: MOVL $0x1, BX . . 106cead: LOCK CMPXCHGL BX, 0(DX) 60ms 60ms 106ceb1: SETE BL ;math/rand.(*lockedSource).Int63 rand.go:388
nothing but total
(pprof) disasm rand Total: 2.63s (pprof)
Also https://github.com/golang/go/issues/50891
Please answer these questions before submitting your issue. Thanks!
What version of pprof are you using?
What system os and processor architecture are you using?
macos
What did you do?
I run my code and want to get disasm from the cpuprofile.
code:
script:
What did you expect to see?
expect to see (which i run in my macos with same code but go version 1.16)
What did you see instead?
nothing but total