Re: [PATCH v4 0/4] perf timechart io mode

[Jiri Olsa]

On Tue, Jun 24, 2014 at 11:38:44AM -0600, David Ahern wrote:
> On 6/24/14, 10:57 AM, Stanislav Fomichev wrote:
> >On Tue, Jun 24, 2014 at 01:10:22PM +0400, Stanislav Fomichev wrote:
> >>>hum, got this when trying:
> >>>
> >>>[jolsa@krava perf]$ sudo ./perf timechart record -I
> >>>^C[ perf record: Woken up 2 times to write data ]
> >>>[ perf record: Captured and wrote 1.071 MB perf.data (~46806 samples) ]
> >>>[jolsa@krava perf]$ ./perf timechart
> >>>Invalid previous event (non-zero)!
> >>>0x113f80 [0x8]: failed to process type: 68
> 
> I see this kind of message a lot, but typically in high event use cases
> (e.g., 100+MB files in a run of a few seconds). I usually increase the map
> size (-m 4096) and/or bump the priority of perf (-r1) and re-run the test.

maybe we dont need to fail in this case.. seems like it should
not be hard to detect, wanr and recover? ;-)

jirka
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