Messages in this thread | | | Date | Mon, 11 Nov 2013 14:56:37 +0100 | From | Ingo Molnar <> | Subject | Re: [RFC/PATCHSET 00/14] perf report: Add support to accumulate hist periods (v2) |
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* Frederic Weisbecker <fweisbec@gmail.com> wrote:
> On Mon, Nov 11, 2013 at 01:13:52PM +0100, Ingo Molnar wrote: > > > > It's not an irrelevant feature at all! :-) > > > > It's just that for any sort of longer profile it was pretty > > difficult/frustrating to use, which I think held back adoption. > > > > That performance problem got fixed now by you and Namhyung, so I think > > we'll see even wider adoption of call-graph profiling... > > Ah I see now. At the time Linus reported his issue, I had the feeling > his usecase was a bit "extreme", but I actually have no idea how far > perf can be used given that I'm mostly used to short benchmarks, > typically hackbench, perf bench sched messaging et al. Thing is I don't > use it enough for my real usecases :)
Well, it's a bit of a catch-22: if there are severe scalability problems for a usecase then people won't use it because they cannot use it. So developers should usually try to over-measure things and go for extreme uses and such.
Thanks,
Ingo
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