Messages in this thread | | | Date | Thu, 11 Sep 2014 10:43:38 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: perf top -g -U --sort=symbol --children == lalalalala? |
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Em Thu, Sep 11, 2014 at 02:43:12PM +0200, Mike Galbraith escreveu: > On Thu, 2014-09-11 at 17:09 +0900, Namhyung Kim wrote: > > On Tue, Sep 9, 2014 at 10:37 PM, Arnaldo Carvalho de Melo > > <acme@ghostprotocols.net> wrote: > > > Em Tue, Sep 09, 2014 at 01:54:01PM +0200, Mike Galbraith escreveu: > > >> Seems the now default on --children thingy doesn't like -U much. > > > > > > Namhyung, can you please take a look at this? > > > > So what is the problem here? > > Well, if you don't see anything wrong, I guess nothing at all.
:-)
I think that when we decide that it is so better to change defaults like we did this time, we should be required to add a big fat warning (a --tui popup, use the first lines on --stdio, etc) about why the default was changed and allow quick, easy opt out, restoring previous behaviour after the user, being warned, knows what to expect, tries it, and then is in a better position to decide if keeping the new default is what is desired.
- Arnaldo
> > >> Samples: 5K of event 'cycles', Event count (approx.): 2268660922 > > >> Children Self Symbol > > >> + 46.42% 0.04% [k] system_call_fastpath
> I'll just turn it off until I figure out what cool stuff this is telling > me. why that symbol becomes the number one hit, and why total% > 100.
> To me, it looks like top smoked it's breakfast, went to lala land ;-)
Yeah, its confusing, I'll let Namhyung explain it ;-)
:-)
- Arnaldo
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