lkml.org 
[lkml]   [2015]   [Oct]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 13/16] perf callchain: Switch default to 'graph,0.5,caller'
Em Wed, Oct 21, 2015 at 10:06:45AM +0200, Ingo Molnar escreveu:
> * Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com> wrote:
> > Indeed, finding a default that is deemed adequate for most people is, ho-hum,
> > difficult 8-)

> > Ingo, what do you think?

> So I think the new default is a lot more intuitive, because it starts with a high
> level top-down 'overview' kind of output, allowing one to drill down to the
> details.

> That's what most other tools do as well by default, and people migrating to perf
> found it pretty confusing that we do a bottom-up kind of callgraph.

> To people using perf for the first time it does not matter nearly as much, but
> intuitiveness is still a factor.

> The new default requires good call-chains and good symbol resolution to be
> maximally effective, but we want perfect callchains and symbols in any case,
> right?

Sure, but in hindsight, we could've fixed those problems before flipping
the switch :-)

And also we didn't care about it that much because for callee based
callchains they are far from the focus point.

- Arnaldo


\
 
 \ /
  Last update: 2015-10-21 15:41    [W:0.160 / U:0.168 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site