Date: Mon, 1 Apr 2002 12:05:02 -0500 From: Jake Burkholder <jake@locore.ca> To: Dag-Erling Smorgrav <des@ofug.org> Cc: arch@FreeBSD.ORG Subject: Re: mutex profiling Message-ID: <20020401120502.G207@locore.ca> In-Reply-To: <xzp8z88e6i1.fsf@flood.ping.uio.no>; from des@ofug.org on Mon, Apr 01, 2002 at 12:07:18AM %2B0200 References: <xzp8z88e6i1.fsf@flood.ping.uio.no>
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Apparently, On Mon, Apr 01, 2002 at 12:07:18AM +0200, Dag-Erling Smorgrav said words to the effect of; > The attached patch (derived from patches by Eivind) adds code to > record statistics about MTX_DEF locks. It's currently i386-only as it > uses the TSC to measure the amount of time each mutex is held. Once You can use the get_cyclecount() function as an MI way to read the tsc or whatever cheap cyclecounter an architecture provides. I think everything we run on but i386 and i486 have one. Jake To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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