linux-kernel - Re: [PATCH v7 0/3] perf report: Support sorting by a given event in group

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Message-ID: <20200318190832.GP11531@kernel.org>
Date:   Wed, 18 Mar 2020 16:08:32 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Jin Yao <yao.jin@...ux.intel.com>
Cc:     jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, Linux-kernel@...r.kernel.org,
        ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v7 0/3] perf report: Support sorting by a given event in
 group

Em Wed, Mar 18, 2020 at 04:03:25PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Wed, Mar 18, 2020 at 04:01:16PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Thu, Feb 20, 2020 at 09:36:13AM +0800, Jin Yao escreveu:
> > > When performing "perf report --group", it shows the event group information
> > > together. By default, the output is sorted by the first event in group.
> > > It would be nice for user to select any event for sorting.
> > > 
> > > The patch 1/3 introduces a new option "--group-sort-idx" to sort the
> > > output by the event at the index n in event group.
> > > 
> > > The patch 2/3 creates a new key K_RELOAD to reload the browser.
> > > 
> > > The patch 3/3 supports hotkeys in browser to select a event to
> > > sort.
> > 
> > Thanks, applied.
> 
> Doesn't work with 'perf top', should, investigating,

So needs a bit of work, but is doable and would be a great addition,
since we do support:

  # perf top --group -e instructions,cycles,cache-misses

And we should strive to make 'perf top' to be a perf.data-less, dynamic
version of 'perf record + perf report'.

Can you please take a look at supporting this? And that --group-sort-idx
too,

I'll push my perf/core branch after a few tests,

Thanks,

- Arnaldo