Hi Arnaldo,
2013-07-30 오후 10:28, Arnaldo Carvalho de Melo 쓴 글:
Em Tue, Jul 30, 2013 at 06:18:58PM +0900, Namhyung Kim escreveu:
From: Namhyung Kim <namhyung....@lge.com>
Current trace info data lacks the saved cmdline mapping which is
needed for pevent to find out the comm of a task. Add this and bump
up the version number so that perf can determine its presence when
reading.
Can't we get this from the PERF_RECORD_COMM synthesized at the beginning
of the session + the kernel generated ones for new threads?
We would just call machine__find_thread() and use thread->comm, etc, no?
Yes, I think it's doable. However it needs an additional perf event
only to generate the COMM events. So I decided not to do it and reused
saved cmdline info from ftrace. But IIUC it also has a problem of
possible information loss due to the size of table.
Thanks,
Namhyung
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