Re: [RFC/PATCH 10/10] perf tools: Change default calchain percent limit to 0.005%

[Andi Kleen]

On Thu, Jan 28, 2016 at 12:40:57AM +0900, Namhyung Kim wrote:
> The current default limit of 0.5% is (mostly) for 'fractal' mode which
> calculates the percentage relatively.  As we changed the default
> callchain mode to 'graph', the existing limit is too high IMHO.
> Normally there're many entries under 0.5% overhead, it'd be supprising
> that they don't show callchains.

It's too small imho. On more complex workloads with a lot of user space
code we often end up with default perf report --stdio callgraph output of several
hundred KB, and most of it is useless as it is only very small.

-Andi