linux-kernel - Re: [BUG] perf test 29 crashing

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Date:	Thu, 30 Jun 2016 17:10:16 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	David Ahern <dsahern@...il.com>,
	Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] perf test 29 crashing

On Wed, Jun 29, 2016 at 11:20:06AM +0900, Namhyung Kim wrote:

SNIP

> > 
> > If this helps break the tie:
> > 
> > dsa@...ny:~/kernel.git$ /tmp/perf/perf test 29
> > 29: Test cumulation of child hist entries                    : Ok
> > 
> > dsa@...ny:~/kernel.git$ /tmp/perf/perf --version
> > perf version 4.7.rc5.g02184c
> > 
> > But running on net-next kernel from a few days ago + 1 local patch:
> > dsa@...ny:~/kernel.git$ uname -r
> > 4.7.0-rc2-00862-g23854048c919
> > 
> > (I do get a few other failures)
> 
> Running latest acme/perf/core:
> 
>   $ perf test hist
>   15: Test matching and linking multiple hists                 : Ok
>   25: Test filtering hist entries                              : Ok
>   28: Test output sorting of hist entries                      : Ok
>   29: Test cumulation of child hist entries                    : Ok
>   $ perf --version
>   perf version 4.6.g6d9c67
> 

hum.. I still see it:
(latest acme's perf/core)

[jolsa@...va perf]$ ./perf --version
perf version 4.7.rc5.ga059d59
[jolsa@...va perf]$ ./perf test hist
15: Test matching and linking multiple hists                 : Ok
25: Test filtering hist entries                              : Ok
28: Test output sorting of hist entries                      : Ok
29: Test cumulation of child hist entries                    : FAILED!

[jolsa@...va perf]$ ./perf test 29 -v
29: Test cumulation of child hist entries                    :
--- start ---
test child forked, pid 11925
perf: Segmentation fault
Obtained 11 stack frames.
./perf(sighandler_dump_stack+0x41) [0x4f57f1]
/lib64/libc.so.6(+0x34a50) [0x7f5e22695a50]
./perf() [0x47b2cc]
./perf(test__hists_cumulate+0x10c) [0x47c79c]
./perf() [0x4698b6]
./perf(cmd_test+0x5be) [0x469eae]
./perf() [0x487561]
./perf(main+0x6f6) [0x424cb6]
/lib64/libc.so.6(__libc_start_main+0xf0) [0x7f5e22681700]
./perf(_start+0x29) [0x424da9]
[(nil)]
test child interrupted
---- end ----
Test cumulation of child hist entries: FAILED!


hate to be the only one with this.. now I need to dive in ;-)

jirka