linux-kernel - Re: [RFC] perf report: Implement symbol filtering on TUI

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Date:	Fri, 9 Mar 2012 08:36:19 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Namhyung Kim <namhyung.kim@....com>
Cc:	Namhyung Kim <namhyung@...il.com>, Arun Sharma <asharma@...com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	linux-kernel@...r.kernel.org, dsahern@...il.com, ravitillo@....gov,
	khandual@...ux.vnet.ibm.com, robert.richter@....com,
	ming.m.lin@...el.com, vweaver1@...s.utk.edu, andi@...stfloor.org
Subject: Re: [RFC] perf report: Implement symbol filtering on TUI


* Namhyung Kim <namhyung.kim@....com> wrote:

> >  - unknown symbols are not matched, and thus they will show up
> >    indiscrimnately even though I only want to see them if the
> >   filter is something like '0x' or 'unknown'.
> >
> 
> Since they have no symbol. :) In the current implementation, 
> it will actually show you such symbols if you enter '0x' or 
> 'unknown' as a filter unless there're symbols that have those 
> letters in its name.
> 
> I can think of 3 solutions for this now:
> 
> 1. Adding a special filter keyword (like 'unknown'). But there's
> probably some symbols which have those letters.
> 
> 2. If filter string consists of (hex-) digits only, it will only
> show hist entries doesn't have symbols, or tries to match based on
> its ip.
> 
> 3. Implement zooming-in to "unknown" dso. Maybe it's a different
> issue, but I think it's good to have and it'll helps this too.
> 
> What do you guys think?

Well, the main problem I had was that they showed up in the 
'perf report sched' filtered output and messed it up.

I.e. I'm not interested in unknown symbols much, I'm interested 
in *not* seeing them when I type 'perf report sched'.

Thanks,

	Ingo
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