Messages in this thread |  | | | Date | Thu, 15 Dec 2011 16:15:45 -0800 | | From | Arun Sharma <> | | Subject | Re: [PATCH 3/4] trace: add ability to collect call chain of non-current task. |
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On 12/15/11 11:08 AM, Arun Sharma wrote:
> I still need to investigate why per-process mode (command line without > -a) doesn't work. Will send an updated patch once that's fixed. >
The per-process mode works fine after moving the trace point to be after:
perf_event_task_sched_in(prev, current);
App developers using this feature here say they're fine not having the block vs sleep distinction because they intend to use it with "-g" and the callstack makes it obvious which one it was.
If we really need this info, we should be able to derive it in user space via perf inject.
-Arun
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