linux-kernel - Re: [PATCH] perf tools: Use tid for finding thread

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Date:	Sun, 11 May 2014 15:15:42 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH] perf tools: Use tid for finding thread

On Wed, May 07, 2014 at 11:26:06AM +0900, Namhyung Kim wrote:
> I believe that passing pid (instead of tid) as the 3rd arg of the
> machine__find*_thread() was to find a main thread so that it can
> search proper map group for symbols.  However with the map sharing
> patch applied, it now can do it in any thread.
> 
> It fixes a bug when each thread has different name, it only reports a
> main thread for samples in other threads.

and breaks tests 14 and 26 ;-)

...
14: Test matching and linking multiple hists               : FAILED!
15: Try 'use perf' in python, checking link problems       : Ok
16: Test breakpoint overflow signal handler                : Ok
17: Test breakpoint overflow sampling                      : Ok
18: Test number of exit event of a simple workload         : Ok
19: Test software clock events have valid period values    : Ok
20: Test converting perf time to TSC                       : Ok
21: Test object code reading                               : Ok
22: Test sample parsing                                    : Ok
23: Test using a dummy software event to keep tracking     : Ok
24: Test parsing with no sample_id_all bit set             : Ok
25: Test dwarf unwind                                      : Ok
26: Test filtering hist entries                            : FAILED!
...

jirka
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