Date: Wed, 28 Nov 2001 20:04:51 +0000 From: Ian Dowse <iedowse@maths.tcd.ie> To: Makoto Matsushita <matusita@jp.freebsd.org> Cc: hackers@FreeBSD.ORG Subject: Re: FreeBSD on vmware Message-ID: <200111282004.aa22335@salmon.maths.tcd.ie> In-Reply-To: Your message of "Thu, 29 Nov 2001 00:07:18 %2B0900." <20011129000718I.matusita@jp.FreeBSD.org>
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In message <20011129000718I.matusita@jp.FreeBSD.org>, Makoto Matsushita writes: >I really know I'm doing a stupid thing, but here is benchmark results >of both "plain" and "patched" 5-current (as of Nov/26/2001). Patched >FreeBSD is about 10% faster than before. ... but only if you spend most of your time running CPU benchmarks :-) Your results show a 50-100% speed increase for operations requiring a lot of kernel activity. Remember also that interrupts etc. cause a background rate of cmpxchg instructions that is quite high. On slower CPUs (I was using a 400MHz PII), the interrupts can soak up virtually all of the available processing capacity without the patch. I suspect this effect is responsible for the most dramatic speedups. Ian To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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