Date: Sat, 30 Mar 2002 15:14:52 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: Robert Watson <rwatson@FreeBSD.ORG>, Matthew Dillon <dillon@apollo.backplane.com>, John Baldwin <jhb@FreeBSD.ORG>, freebsd-smp@FreeBSD.ORG Subject: Re: Syscall contention tests return, userret() bugs/issues. Message-ID: <77416.1017497692@critter.freebsd.dk> In-Reply-To: Your message of "Sat, 30 Mar 2002 15:10:20 %2B0100." <76368.1017497420@critter.freebsd.dk>
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In message <76368.1017497420@critter.freebsd.dk>, Poul-Henning Kamp writes: >The practical guide to execute #3 should be: > > A = Time reference code > B = Time modified code > C = Time reference code > D = Time modified code > >Unless both A and C are lower than both B and D it will take a lot >of carefully controlled test-runs to prove that there is a statistically >significant improvement (standard deviations and all that...) And of course I get the sign wrong: Unless both A and C are _higher_ than both B and D... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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