Date: Sat, 30 Mar 2002 09:14:36 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: John Baldwin <jhb@FreeBSD.ORG>, freebsd-smp@FreeBSD.ORG Subject: Re: Syscall contention tests return, userret() bugs/issues. Message-ID: <11416.1017476076@critter.freebsd.dk> In-Reply-To: Your message of "Fri, 29 Mar 2002 14:07:15 PST." <200203292207.g2TM7Fi67491@apollo.backplane.com>
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In message <200203292207.g2TM7Fi67491@apollo.backplane.com>, Matthew Dillon wri > And do a compative syscall rate test on a two-cpu system running > two getuid() processes, this happens: > > 1 process 2 processes > w/PCPU: 1004000 1000000 > w/++cnt.v_syscall: 1004000 853000 But is this a relevant test-case to optimize for ? We are trying to eliminate all often used trivial syscalls need to get into the kernel in the first place, and for non-trivial syscalls it doesn't matter a hoot how that increment is done... -- 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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