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cmd/pprof: add -runtime flag

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The flag disables stripping of runtime frames in profiles.
This is useful when analyzing runtime itself.

Before:
$ go tool pprof --text --alloc_objects --lines fmt.test /tmp/mprof
      flat  flat%   sum%        cum   cum%
      2768 79.65% 79.65%      32768 79.65%  fmt_test.TestComplexFormatting fmt/fmt_test.go:744
      6554 15.93% 95.58%       6554 15.93%  regexp/syntax.(*compiler).rune regexp/syntax/compile.go:267
      1820  4.42%   100%       1820  4.42%  runtime.malg runtime/proc1.go:1977

After:
$ go tool pprof --text --alloc_objects --lines --runtime fmt.test /tmp/mprof
      flat  flat%   sum%        cum   cum%
     32768 79.65% 79.65%      32768 79.65%  runtime.convT2E runtime/iface.go:139
      6554 15.93% 95.58%       6554 15.93%  runtime.growslice runtime/slice.go:89
      1820  4.42%   100%       1820  4.42%  runtime.malg runtime/proc1.go:1977

Change-Id: If468dfa5c5bbd0809c45a58d912d3115fac009ed
Reviewed-on: https://go-review.googlesource.com/5291
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>
This commit is contained in:
Dmitry Vyukov 2015-02-19 15:21:05 +03:00
parent 5dbbb77633
commit d384545a45
1 changed files with 6 additions and 1 deletions
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7
src/cmd/pprof/internal/driver/driver.go
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@ -106,7 +106,9 @@ func PProf(flagset plugin.FlagSet, fetch plugin.Fetcher, sym plugin.Symbolizer,
return err
}
prof.RemoveUninteresting()
if !*f.flagRuntime {
prof.RemoveUninteresting()
}
if *f.flagInteractive {
return interactive(prof, obj, ui, f)
@ -445,6 +447,7 @@ type flags struct {
flagNodeFraction *float64 // Hide nodes below <f>*total
flagEdgeFraction *float64 // Hide edges below <f>*total
flagTrim *bool // Set to false to ignore NodeCount/*Fraction
flagRuntime *bool // Show runtime call frames in memory profiles
flagFocus *string // Restricts to paths going through a node matching regexp
flagIgnore *string // Skips paths going through any nodes matching regexp
flagHide *string // Skips sample locations matching regexp
@ -640,6 +643,7 @@ func getFlags(flag plugin.FlagSet, overrides commands.Commands, ui plugin.UI) (*
flagNodeFraction: flag.Float64("nodefraction", 0.005, "Hide nodes below <f>*total"),
flagEdgeFraction: flag.Float64("edgefraction", 0.001, "Hide edges below <f>*total"),
flagTrim: flag.Bool("trim", true, "Honor nodefraction/edgefraction/nodecount defaults"),
flagRuntime: flag.Bool("runtime", false, "Show runtime call frames in memory profiles"),
flagFocus: flag.String("focus", "", "Restricts to paths going through a node matching regexp"),
flagIgnore: flag.String("ignore", "", "Skips paths going through any nodes matching regexp"),
flagHide: flag.String("hide", "", "Skips nodes matching regexp"),
@ -877,6 +881,7 @@ var usageMsg = "Output file parameters (for file-based output formats):\n" +
" -contentions Display number of delays at each region\n" +
" -mean_delay Display mean delay at each region\n" +
"Filtering options:\n" +
" -runtime Show runtime call frames in memory profiles\n" +
" -focus=r Restricts to paths going through a node matching regexp\n" +
" -ignore=r Skips paths going through any nodes matching regexp\n" +
" -tagfocus=r Restrict to samples tagged with key:value matching regexp\n" +