Messages in this thread | | | Date | Tue, 21 Sep 2010 09:19:13 +0800 | Subject | Re: Is it supported to perf probe data? | From | Luming Yu <> |
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On Tue, Sep 21, 2010 at 7:54 AM, Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote: > Hi Luming, > > (2010/09/20 17:03), Luming Yu wrote: >> Hi there, >> >> I need to analyze accessing pattern to a data in kernel. Wanna to >> check with you if perf probe can help to get that trace. > > Yes, perf probe can add new trace events which can be used > from perf record/report/trace or ftrace as same as other pre-defined > trace events. Those new events can record variables as arguments too. > So you can define new events with accessed data, record it by perf record, > and see it by perf trace.
e.g. I need to trace accessing to thread_info.flags of a specific task, would you please show me an example how to do it.
Thanks, Luming
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