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

Jiri Olsa
2016-02-26T23:13:19Z

On Sat, Feb 27, 2016 at 12:12:08AM +0100, Jiri Olsa wrote:
> 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

heh, wrong thread.. sry ;-)

jirka