Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy

From	Jiri Olsa <jolsa@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy
Date	2016-02-27 00:20 +0100
Message-ID	<r6zPY-26L-9@gated-at.bofh.it> (permalink)
References	(2 earlier) <r6yqT-W4-29@gated-at.bofh.it> <r6yqU-W4-39@gated-at.bofh.it> <r6yKe-1lH-3@gated-at.bofh.it> <r6z3C-1uq-77@gated-at.bofh.it> <r6zdg-1zD-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Feb 26, 2016 at 07:37:05PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Feb 26, 2016 at 05:26:02PM -0500, Steven Rostedt escreveu:
> > On Fri, 26 Feb 2016 19:08:19 -0300
> > Arnaldo Carvalho de Melo <acme@kernel.org> wrote:
> > 
> > 
> > > It is exploding at this depth, not liking how gfp_flags is described, problem
> > > seems to be in this function, this __print_flags() long thing.
> > > 
> > > Steven, does this look familiar?
> > > 
> > >
> > 
> > Hmm, trace-cmd has the same issue. I just having noticed.
> > 
> > I'll see if I can fix it.
> 
> Ok, this works well with an RHEL kernel being tested with tons of perf
> backports by Jiri, its just with 4.5-rc kernels that this is exploding.

thanks, I isolated this down to the:
  156174999dd1 perf/intel/x86: Enlarge the PEBS buffer

it's related to the FREERUNNING PEBS patchset that allows
store more than 1 event in PEBS buffer

seems like Core CPU doesn't like the default setup and
delays in msr access, which makes the watchdog scream

jirka

Thread

[PATCH 4/5] perf report: Fix dynamic entry display in hierarchy Namhyung Kim <namhyung@kernel.org> - 2016-02-26 20:00 +0100
  Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-02-26 22:50 +0100
    Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-02-26 22:50 +0100
      Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-02-26 23:10 +0100
        Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-02-26 23:30 +0100
        Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy Steven Rostedt <rostedt@goodmis.org> - 2016-02-26 23:30 +0100
          Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-02-26 23:40 +0100
            Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy Jiri Olsa <jolsa@redhat.com> - 2016-02-27 00:20 +0100
              Re: [PATCH 4/5] perf report: Fix dynamic entry display in hierarchy Jiri Olsa <jolsa@redhat.com> - 2016-02-27 00:20 +0100
        [PATCH] tools lib traceevent: Add '~' operation within  arg_num_eval() Steven Rostedt <rostedt@goodmis.org> - 2016-02-27 00:20 +0100
          Re: [PATCH] tools lib traceevent: Add '~' operation within  arg_num_eval() Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-02-27 00:40 +0100
          Re: [PATCH] tools lib traceevent: Add '~' operation within  arg_num_eval() David Ahern <dsahern@gmail.com> - 2016-02-27 00:50 +0100
  [tip:perf/core] perf hists: Fix dynamic entry display in hierarchy tip-bot for Namhyung Kim <tipbot@zytor.com> - 2016-02-27 10:50 +0100

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