* Arnaldo Carvalho de Melo <a...@kernel.org> wrote:
> Em Fri, Jun 19, 2015 at 08:27:11AM +0200, Ingo Molnar escreveu:
> > * Arnaldo Carvalho de Melo <a...@kernel.org> wrote:
> > > Em Thu, Jun 18, 2015 at 10:58:13PM +0200, Ingo Molnar escreveu:
> > > > * Arnaldo Carvalho de Melo <a...@kernel.org> wrote:
> > > > > z Toggle zeroing of samples
> > > > > / Filter symbol by name
>
> > > > Is 'f' (for 'freeze') still available?
>
> > > It is available in both the 'report'/'top' (aka the "hists" browser) and
> > > in the
> > > annotate browser, so I'll go with it, and leave CTRL+z alone, then make
> > > it it
> > > suspend.
>
> > Sounds good to me!
>
> I'm fixing these issues now and a mildly crazy idea ocurred to me: now we can
> go
> from 'top' to 'report' and back, but only if we start in 'perf top', but I
> think
> we could go from 'perf report' to 'perf top' mode too, i.e. start with a
> perf.data file, then enable collecting more samples that would then be added
> to
> the existing histograms, etc.
>
> Unsure if this would be useful tho ;-) Its just that it may be easy to do and
> would be another step into having it all integrated.
So I think the following would be useful for perf report: if we recorded the
precise command line used, in the perf.data.
So if someone types:
perf record -e cache-misses make -j16 kernel
then we'd have the whole command line in the perf.data:
"perf record -e cache-misses make -j16 kernel"
and if there was a hotkey to take new samples, using the exact same workload.
This is non-trivial though.
Going from 'perf report' to 'perf top' would be intuitive if the 'perf record'
before was 'perf top' alike, for example:
perf record -a sleep 10
or:
perf record -a
<Ctrl-C>
in that case going to 'perf top' is a natural extension of the profiling
session.
Thanks,
Ingo
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