Date: Fri, 25 Jun 1999 08:30:03 -0700 (PDT) From: Thomas Schuerger <schuerge@wjpserver.CS.Uni-SB.DE> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/12381: Bad scheduling in FreeBSD Message-ID: <199906251530.IAA86646@freefall.freebsd.org>
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The following reply was made to PR kern/12381; it has been noted by GNATS. From: Thomas Schuerger <schuerge@wjpserver.CS.Uni-SB.DE> To: Sheldon Hearn <sheldonh@uunet.co.za> Cc: freebsd-gnats-submit@freebsd.org Subject: Re: kern/12381: Bad scheduling in FreeBSD Date: Fri, 25 Jun 1999 17:26:14 +0200 (MET DST) > > Not quite. The second PR states that FreeBSD uses a strange 2:1 > > time-slicing when having two CPU-intensive processes, one in the > > foreground and one in the background. In the first PR, I stated that > > also any I/O is very much affected by long-runners in the background, > > so that even processes not requiring much CPU-time but depending on > > I/O (network, disks) are affected. > > So surely the "problem" in the first PR would "go away" if the "problem" in > the second were resolved? Well, it may or may not be the case. I don't know. > By the way, when you did your comparison with Solaris, were you watching > CPU time spent in system? Yes, the used CPU time advances in the same way as the CPU time percentage suggests. Ciao, Thomas. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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