Messages in this thread | | | Date | Wed, 21 Oct 2015 10:21:22 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH 13/16] perf callchain: Switch default to 'graph,0.5,caller' |
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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
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