Messages in this thread | | | Date | Thu, 06 Feb 2014 10:48:19 -0700 | From | David Ahern <> | Subject | Re: [BUG] perf top: --stdio causes continuous refresh |
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On 2/6/14, 8:24 AM, Stephane Eranian wrote: > On Thu, Feb 6, 2014 at 3:09 PM, Arnaldo Carvalho de Melo > <acme@redhat.com> wrote: >> Em Thu, Feb 06, 2014 at 12:07:05PM -0200, Arnaldo Carvalho de Melo escreveu: >>> Em Thu, Feb 06, 2014 at 02:58:01PM +0100, Stephane Eranian escreveu: >>>> On Thu, Feb 6, 2014 at 2:56 PM, Arnaldo Carvalho de Melo >>>> <acme@redhat.com> wrote: >>>>> Em Wed, Feb 05, 2014 at 10:25:09PM +0100, Stephane Eranian escreveu: >>>>>> If you run perf top on 3.14 but you force --stdio mode, perf top >>>>>> goes crazy and constantly refreshes the output. >>> >>>>>> It does that with many older versions of the perf as well on 3.14. >>>>>> It runs fine with newt mode. >>> >>>>>> Works fine with my 3.11 kernel. So something must be broken >>>>>> with 3.14. >>> >>>>>> Can you reproduce the problem as well? >>> >>>>> Not so far, using my perf/urgent branch: >>> >>>> I am using tip.git. Or try 3.11, 3.10. >> >> But my tests are on top of: >> >> [acme@ssdandy linux]$ uname -r >> 3.11.4-101.fc18.x86_64 >> >> I thought it was a 3.14ish one, building one to try there... >> > The kernel must be 3.14-rcX, the tool can be any version.
I don't have time to do a git bisect, but I can narrow the window to 3.13-rc6 and 3.14-rc1. Just happened to update a server yesterday. perf-top --stdio runs fine on the former and shows the problem on the latter.
David
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