Date: Fri, 6 Nov 1998 11:40:44 -0500 (EST) From: Brian Feldman <green@unixhelp.org> To: Cory Kempf <ckempf@enigami.com> Cc: freebsd-current@FreeBSD.ORG Subject: Re: bad time slicing? Priorities? Message-ID: <Pine.BSF.4.05.9811061139160.29441-100000@janus.syracuse.net> In-Reply-To: <x7sofwokbb.fsf@singularity.enigami.com>
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You don't really understand the scheduling. Nice the xgalaga to 0 or -1, and try again. Plus, rc5des is running on BOTH CPU's (FreeBSD splits it of course and switches them around to have the best performance), FreeBSD is not "magic". Brian Feldman On 6 Nov 1998, Cory Kempf wrote: > I have a system running 3.0 SMP, with 2 333MHz PII's. > > On this system, I am running two copies of the Bovine RSA client (rc5des) > (essentially two endless CPU bound tasks, niced down to 19) > > >From top: > PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU COMMAND > 23593 root 105 19 832K 344K RUN 0 23.4H 98.15% 98.15% rc5des > 23726 root 105 19 832K 336K CPU1 0 22.7H 97.89% 97.89% rc5des > > We are not swapping, or anything else obvious. > > If I run xgalaga (a game), which is being run at nice=5 for some > reason (not sure why, haven't looked into it), It doesn't seem to be > getting enough CPU time. > > Play is jerky and slow. > > This isn't what I expected. Expecially with two CPUs to play with. > The rc5des programs, should essentially not be running if higher > priority things are waiting to run, right? Certainly with two CPUs, I > would expect that the game would get time pretty much as soon as it > was ready to run, while the other tasks would fight over what was > left. > > So, do I just not understand how BSD does its scheduling? Or is there > actually something wrong? > > Thanks, > > +C > > -- > Thinking of purchasing RAM from the Chip Merchant? > Please read this first: <http://www.enigami.com/~ckempf/chipmerchant.html>; > > Cory Kempf Macintosh / Unix Consulting & Software Development > ckempf@enigami.com <http://www.enigami.com/~ckempf/>; > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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