| Date | Wed, 27 Jan 2016 17:06:12 +0100 | From | Andi Kleen <> | Subject | Re: [RFC/PATCH 10/10] perf tools: Change default calchain percent limit to 0.005% |
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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
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