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Date: Fri, 13 Mar 2009 14:07:30 +0100 From: Ingo Molnar <mingo@...e.hu> To: Peter Zijlstra <a.p.zijlstra@...llo.nl>, Frédéric Weisbecker <fweisbec@...il.com>, Steven Rostedt <rostedt@...dmis.org> Cc: paulus@...ba.org, tglx@...utronix.de, linux-kernel@...r.kernel.org Subject: Re: [PATCH 00/11] generic software counters -v2 * Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote: > This patch set improves the current software counters by > providing sampling events for most of them. > > The clock based software counters use hrtimers to generate > events, allowing sample based profiling without hardware > support -- obviously this has limited functionality for kernal > based profiling since we disable interrupts quite frequently, > but should be good for userspace. > > Other events like pagefaults insert simple hooks into the > actual pagefault code to generate these events. Very nice series! Applied to tip:core/locking and tip:perfcounters/core - thanks Peter! Fixed a trivial !PERF_COUNTERS build failure as well. > Future work (in-progress) will hook into the tracepoint > infrastructure to to provide profiling events. Cool! Especially for pagefaults we have a number of callbacks there: kmmio, kprobes, kmemcheck, tracing, perfcounters - they could indeed all be consolidated step by step onto a tracepoint. Ingo -- 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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