Date: Mon, 10 Dec 2001 05:30:02 -0800 (PST) From: Bruce Evans <bde@zeta.org.au> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/32667: systat waste too much time reading input Message-ID: <200112101330.fBADU2Y26351@freefall.freebsd.org>
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The following reply was made to PR bin/32667; it has been noted by GNATS. From: Bruce Evans <bde@zeta.org.au> To: "Vladimir B.Grebenschikov" <vova@sw.ru> Cc: <FreeBSD-gnats-submit@FreeBSD.ORG> Subject: Re: bin/32667: systat waste too much time reading input Date: Tue, 11 Dec 2001 00:28:30 +1100 (EST) On Mon, 10 Dec 2001, Vladimir B.Grebenschikov wrote: > Have tried also on 4.4-RELEASE - same problem > >Description: > I have found that on same, not busy system top & systat runing > simulataniosly "eat" very different amount of CPU time, like: > > CPU > 5.37% systat > 0.01% top > > triing find out what happens, I have tried to run > systat -vm 1 < /dev/null > And found that systat eats a lot of system resources during input > > WCPU CPU > 63.05% 16.36% systat This seems to be because the VM_METER sysctl is increadibly slow. It takes 13 msec here on an Athlon1600XP system with 512MB memory, but "only" 3 msec on a Celeron366 system with 256MB memory. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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