linux-kernel - Re: [PATCHSET 0/3] perf diff: Introduce delta-abs compute method

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Date:   Mon, 6 Feb 2017 22:44:03 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Minchan Kim <minchan@...nel.org>,
        Taeung Song <treeze.taeung@...il.com>
Subject: Re: [PATCHSET 0/3] perf diff: Introduce delta-abs compute method

On Mon, Feb 06, 2017 at 11:26:17AM +0100, Jiri Olsa wrote:
> On Mon, Feb 06, 2017 at 04:20:34PM +0900, Namhyung Kim wrote:
> 
> SNIP
> 
> > 
> >   git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
> > 
> > Thanks,
> > Namhyung
> > 
> > 
> > Namhyung Kim (3):
> >   perf diff: Add 'delta-abs' compute method
> >   perf diff: Add diff.order config option
> >   perf diff: Add diff.compute config option
> > 
> 
> hum, do I miss some -o fix?
> 
> [jolsa@...va perf]$ ./perf diff -o 1 -c delta-abs
> Segmentation fault (core dumped)
> 
> it's not delta-abs specific, I'm getting the crash for others

Yes, the fixes are in perf/urgent and it seems not sync'ed to
perf/core yet.  If you pull my branch it has the fixes as well.

Thanks,
Namhyung


> 
> thanks,
> jirka
> 
> 
> (gdb) r diff -o 1 -c delta-abs
> Starting program: /home/jolsa/kernel/linux-perf/tools/perf/perf diff -o 1 -c delta-abs
> Missing separate debuginfos, use: dnf debuginfo-install glibc-2.23.1-11.fc24.x86_64
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib64/libthread_db.so.1".
> Detaching after fork from child process 12611.
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000000000 in ?? ()
> Missing separate debuginfos, use: dnf debuginfo-install audit-libs-2.7.1-1.fc24.x86_64 bzip2-libs-1.0.6-21.fc24.x86_64 elfutils-libelf-0.168-1.fc24.x86_64 elfutils-libs-0.168-1.fc24.x86_64 libcap-ng-0.7.8-1.fc24.x86_64 libunwind-1.1-11.fc24.x86_64 nss-softokn-freebl-3.28.1-1.0.fc24.x86_64 numactl-libs-2.0.11-2.fc24.x86_64 openssl-libs-1.0.2j-3.fc24.x86_64 perl-libs-5.22.3-368.fc24.x86_64 python-libs-2.7.13-1.fc24.x86_64 slang-2.3.0-5.fc24.x86_64 xz-libs-5.2.2-2.fc24.x86_64 zlib-1.2.8-10.fc24.x86_64
> (gdb) bt
> #0  0x0000000000000000 in ?? ()
> #1  0x000000000059c3c2 in fprintf_line (hists=0x2159980, hpp=0x7fffffffda60, line=0, fp=0x7ffff55c3600 <_IO_2_1_stdout_>)
>     at ui/stdio/hist.c:677
> #2  0x000000000059c4af in hists__fprintf_standard_headers (hists=0x2159980, hpp=0x7fffffffda60, fp=0x7ffff55c3600 <_IO_2_1_stdout_>)
>     at ui/stdio/hist.c:700
> #3  0x000000000059c707 in hists__fprintf_headers (hists=0x2159980, fp=0x7ffff55c3600 <_IO_2_1_stdout_>) at ui/stdio/hist.c:745
> #4  0x000000000059c7b9 in hists__fprintf (hists=0x2159980, show_header=true, max_rows=0, max_cols=0, min_pcnt=0, 
>     fp=0x7ffff55c3600 <_IO_2_1_stdout_>, use_callchain=false) at ui/stdio/hist.c:769
> #5  0x000000000042b6aa in hists__process (hists=0x2159980) at builtin-diff.c:694
> #6  0x000000000042b944 in data_process () at builtin-diff.c:753
> #7  0x000000000042bb2b in __cmd_diff () at builtin-diff.c:790
> #8  0x000000000042d0ed in cmd_diff (argc=0, argv=0x7fffffffe3d0, prefix=0x0) at builtin-diff.c:1349
> #9  0x00000000004b817e in run_builtin (p=0xa10be0 <commands+96>, argc=5, argv=0x7fffffffe3d0) at perf.c:359
> #10 0x00000000004b83eb in handle_internal_command (argc=5, argv=0x7fffffffe3d0) at perf.c:421
> #11 0x00000000004b8530 in run_argv (argcp=0x7fffffffe21c, argv=0x7fffffffe210) at perf.c:467
> #12 0x00000000004b8933 in main (argc=5, argv=0x7fffffffe3d0) at perf.c:614