linux-kernel - Re: [PATCH 10/10] perf tools: Move TUI-specific fields out of map

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Message-ID: <20150504154227.GD10475@kernel.org>
Date:	Mon, 4 May 2015 12:42:27 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>
Subject: Re: [PATCH 10/10] perf tools: Move TUI-specific fields out of
 map_symbol

Em Wed, Apr 22, 2015 at 04:18:21PM +0900, Namhyung Kim escreveu:
> The has_children and unfolded fields don't belong to struct map_symbol
> since they're used by TUI only.  Move those fields out of map_symbol
> since the struct is also used by other places.
> 
> This will also help to compact the sizeof struct hist_entry.

So, while testing your 'perf kmem' patchkit, I noticed that I couldn't,
on a 'perf report --no-ch' (probably affects the children case as well,
have not tested that), expand the first callchain entry, I did a bisect
on my perf/core branch and it ended in this patch:


[acme@...andy linux]$ git bisect good 
7ee14d744acb33e5b3114484d7d850caecb339a2 is the first bad commit
commit 7ee14d744acb33e5b3114484d7d850caecb339a2
Author: Namhyung Kim <namhyung@...nel.org>
Date:   Wed Apr 22 16:18:21 2015 +0900

    perf tools: Move TUI-specific fields out of map_symbol
    
    The has_children and unfolded fields don't belong to struct map_symbol
    since they're used by TUI only.  Move those fields out of map_symbol
    since the struct is also used by other places.
    
    This will also help to compact the sizeof struct hist_entry.
    
    Signed-off-by: Namhyung Kim <namhyung@...nel.org>
    Acked-by: Jiri Olsa <jolsa@...hat.com>
    Cc: David Ahern <dsahern@...il.com>
    Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
    Link: http://lkml.kernel.org/r/1429687101-4360-11-git-send-email-namhyung@kernel.org
    Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>

:040000 040000 a72f0be94a86bbdad1cc38d0ce1e8578337612f4 4f84cc2bac01666a97b918aef0151b07e9a4015c M	tools
[acme@...andy linux]$ 

So I am moving this series to the top of perf/core and then moving it to a
separate branch, so that you can try to reproduce this and I can push the rest
to Ingo, ok?

Ah, while trying to find new_slab() in callchains one other thing I tried was
to press 'E', to expand all the callchains, and it segfaulted, unsure if this
is related.

Will send another message with the branch details when done.

- Arnaldo
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