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Message-ID: <alpine.DEB.0.9999.0711160943470.15441@twinlark.arctic.org> Date: Fri, 16 Nov 2007 09:51:08 -0800 (PST) From: dean gaudet <dean@...tic.org> To: Andi Kleen <andi@...stfloor.org> cc: Philip Mucci <mucci@...utk.edu>, Andrew Morton <akpm@...ux-foundation.org>, Greg KH <gregkh@...e.de>, Stephane Eranian <eranian@....hp.com>, William Cohen <wcohen@...hat.com>, Robert Richter <robert.richter@....com>, linux-kernel@...r.kernel.org, papi list <ptools-perfapi@...utk.edu> Subject: Re: perfmon2 merge news On Fri, 16 Nov 2007, Andi Kleen wrote: > I didn't see a clear list. - cross platform extensible API for configuring perf counters - support for multiplexed counters - support for virtualized 64-bit counters - support for PC and call graph sampling at specific intervals - support for reading counters not necessarily with sampling - taskswitch support for counters - API available from userland - ability to self-monitor: need select/poll/etc interface - support for PEBS, IBS and whatever other new perf monitoring infrastructure the vendors through at us in the future - low overhead: must minimize the "probe effect" of monitoring - low noise in measurements: cannot achieve this in userland permon2 has all of this and more i've probably neglected... -dean - 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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