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Date: Sat, 19 Jan 2008 06:07:28 +0100 From: Andi Kleen <andi@...stfloor.org> To: Arjan van de Ven <arjan@...ux.intel.com> Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [Announce] Development release 0.1 of the LatencyTOP tool Arjan van de Ven <arjan@...ux.intel.com> writes: > The Intel Open Source Technology Center is pleased to announce the > release of version 0.1 of LatencyTOP, a tool for developers to visualize > system latencies. Just for completeness -- Linux already had a way to profile latencies since quite some time. It's little known unfortunately and doesn't work for modules since it's a special mode in the old non modular kernel profiler. You enable CONFIG_SCHEDSTATS and boot with profile=sleep and then you can use the readprofile command to read the data. Information can be reset with echo > /proc/profile There's also a profile=sched to profile the scheduler which works even without CONFIG_SCHEDSTATS Latencytop will be probably a little more user friendly though. -Andi -- 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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