Date: Thu, 14 Oct 2004 16:22:43 -0500 From: Phusion <phusion2k@gmail.com> To: jason <jason@ec.rr.com> Cc: freebsd-questions@freebsd.org Subject: Re: HZ=100 ?? vmware Message-ID: <c3ed3fdc04101414222d500bc@mail.gmail.com> In-Reply-To: <416EE0D6.5050805@ec.rr.com> References: <20041014195717.535e39f7.dick@nagual.st> <416EE0D6.5050805@ec.rr.com>
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Hi, I run VMware3 on FreeBSD 5.2.1 fine. I use HZ=1200, and that seems to work perfect. I've tested and found that 1000, and even 1100 still gave me "rtc: 100 > kern.hz" messages. When I set HZ=1200 I got no more of these messages. On Thu, 14 Oct 2004 16:25:58 -0400, jason <jason@ec.rr.com> wrote: > dick hoogendijk wrote: > > >Okey, I found out I need to increase the HZ=100 default in the kernel > >config to a higher number. I also understand it decreases system > >response times. > > > >So, what I need to know is the lowest setup for HZ=??? to be able to run > >vmware3 in full screen. I got to get rid of the "rtc: 100 > kern.hz" > >prompt. > > > >Google tells me to increase to HZ=1200 but is this not too high? > > > > > > > In man polling a kernel config of HZ=1000 is the default if you want to > use polling. I am not sure, but if vmware is using the same HZ setting > as polling does then 1200 is not too high. If I understand it right, > the HZ setting tells stuff how often to checkin to see if work needs > doing. 100hz would be way too low. Every 100hz on say a 2ghz machince > would requirer you to spend a lot of time on something every > sec(2billion/100 per sec if I am right). Maybe nothing because you are > delaying some programs that you want to execute, not pause and wait > every 100hz. This would most likely slow everything down, a higher > number would make things smoother and faster, but only to a point. Its > kind of complicated, but when you find the right spot(somewhere in the > middle) everything is good. If you had a 4ghz machince you may want an > even larger number. If I am wrong I am sure there will be a followup > shortly. > > Jason > > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >
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