Date: Thu, 16 Nov 2000 15:34:43 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: flaw <flaw@vt.edu> Cc: George Reid <greid@dogma.freebsd-uk.eu.org>, freebsd-questions <freebsd-questions@FreeBSD.org> Subject: RE: FreeBSD VM Message-ID: <XFMail.001116153443.jhb@FreeBSD.org> In-Reply-To: <3A1C57B4@zathras.cc.vt.edu>
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On 16-Nov-00 flaw wrote: > Maybe due to the amount of memory, the program is still in memory so no page > faults are induced. But why cnt.v_vm_faults (cnt is the vmmeter) are > incremented much more frequently than p->p_stats->p_ru.ru_majflt? Also, the > swapper process with pid 0 (why pid 0?) has ru_majflt the same as > cnt.v_vm_faults. > > Any help and explanation is appreciated. Well, the swapper is actually a kernel process, so it doesn't have to swap in any text via pageins for itself. However, it faults in other processes, and those pagein's are presumably counted both by cnt.v_vm_faults and majflt. As for why v_vm_faults is incremented more often, I'm not sure. Perhaps majflt doesn't take COW faults into account. You might want to ask this on hackers@FreeBSD.org instead. :) > Thanks. > Ray, -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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