Re: [PATCH 13/16] perf callchain: Switch default to 'graph,0.5,caller'

From: Ingo Molnar
Date: Wed Oct 21 2015 - 04:07:01 EST



* Arnaldo Carvalho de Melo <arnaldo.melo@xxxxxxxxx> 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?

Thanks,

Ingo
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