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Date: Wed, 10 Nov 2010 14:38:31 -0500 From: Steven Rostedt <rostedt@...dmis.org> To: Peter Zijlstra <a.p.zijlstra@...llo.nl> Cc: Ingo Molnar <mingo@...e.hu>, "Luck, Tony" <tony.luck@...el.com>, linux-kernel@...r.kernel.org, ying.huang@...el.com, bp@...en8.de, tglx@...utronix.de, akpm@...ux-foundation.org, mchehab@...hat.com, Frédéric Weisbecker <fweisbec@...il.com>, Arnaldo Carvalho de Melo <acme@...hat.com>, Arjan van de Ven <arjan@...radead.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com> Subject: Re: [RFC/Requirements/Design] h/w error reporting On Wed, 2010-11-10 at 19:24 +0100, Peter Zijlstra wrote: > There is lots of code between getting the event and landing it in the > buffer. The buffer itself is perfectly suited for high speed low > overhead stuffs, the perf data format possibly not because its not > bitfield happy. Question: Can we make perf lower what it records, thus speeding up the amount it records, without breaking the ABI? Can we add flight recorder mode splice version, non mmap, without breaking the ABI? If we can make perf as fast as ftrace in its recording, and maybe even faster if we have the ability to select what is recorded and compress the events, I'm all for it. -- Steve -- 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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