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Date: Fri, 20 Mar 2009 10:27:14 +0100 From: Ingo Molnar <mingo@...e.hu> To: Peter Zijlstra <a.p.zijlstra@...llo.nl> Cc: paulus@...ba.org, rostedt@...dmis.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 00/10] tracepoint perf counter events and new ABI * Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote: > These patches change the event tracer to provide id files: > > [root@...eron ~]# for i in /debug/tracing/events/irq/*/id; do echo `cat $i` - $i; done > 28 - /debug/tracing/events/irq/irq_handler_entry/id > 29 - /debug/tracing/events/irq/irq_handler_exit/id > 27 - /debug/tracing/events/irq/softirq_entry/id > 26 - /debug/tracing/events/irq/softirq_exit/id > > These can then be used in profiling as: > > [root@...eron linux-2.6]# ~/perfstat -e 2:28 make O=native-build/ -j4 lib > ... > > Performance counter stats for 'make': > > 18280.657602 task clock ticks (msecs) > > 465 tp: 28 (events) > > Wall-clock time elapsed: 11265.199196 msecs > > Showing that we had 465 irq_handler_entry events during that workload. nice! I suspect perfstat could use "-e irq_handler_entry" type of symbolic input as well. I've started picking up the patches and started testing them. Thanks Peter, 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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