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SubjectRe: [PATCH v4 0/4] perf timechart io mode
On 6/24/14, 12:51 PM, Jiri Olsa wrote:
> 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? ;-)
>

seems to me it should not be happening at all. It seems like the head
caught the tail and was not properly detected.

David



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