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Date: Tue, 20 Oct 2009 06:26:50 +0200 From: Peter Zijlstra <peterz@...radead.org> To: Tim Blechmann <tim@...ngt.org> Cc: linux-kernel@...r.kernel.org, mingo@...e.hu Subject: Re: pref record question On Mon, 2009-10-19 at 19:04 +0200, Tim Blechmann wrote: > i am trying to do some profiling with perf (2.6.31.4). while > thread-level profiling works fine, i haven't been able to record > profiling data of a whole process (i.e. main thread + child threads). > from my understanding, this should be enabled by running 'perf record > -i' on the main thread. this does only collect the data from the main > thread, though. > > is this an issue with perf or with my understanding of perf? -i will only inherit the counters on new fork()/clone() calls, so an existing process/task tree will not automagically get the counters. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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