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
> <a...@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.
Tried torvalds/master, no problem, looking at what the top's screen
refresh thread does we can see:
[root@ssdandy ~]# trace -t 3562 -e \!write
0.000 ( 0.000 ms): ... [continued]: poll()) = 0 Timeout
2031.522 (2002.480 ms): poll(ufds: 0x7fbb91596bb0, nfds: 1, timeout_msecs:
2000 ) = 0 Timeout
4064.346 (2002.456 ms): poll(ufds: 0x7fbb91596bb0, nfds: 1, timeout_msecs:
2000 ) = 0 Timeout
^C[root@ssdandy ~]#
I.e. waiting the default of:
.delay_secs = 2,
2 seconds between refreshes.
Checking out tip.tip, or are you suggesting to try an old perf binary, from
3.11 or 3.10 on top of a newer kernel?
- Arnaldo
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