Date: Tue, 04 Apr 2006 17:41:19 +0300 From: Petri Helenius <pete@he.iki.fi> To: Eric <ericd@free.fr> Cc: Lucas Holt <luke@foolishgames.com>, freebsd-smp@freebsd.org, Mark Kirkwood <markir@paradise.net.nz> Subject: Re: Low perf with smp Message-ID: <4432858F.90701@he.iki.fi> In-Reply-To: <027f01c657f4$0d0a66a0$65fd24c0@Eric> References: <009301c65418$cc029f30$65fd24c0@Eric><64659004-E643-4044-AAED-076E0CC91977@foolishgames.com><01a901c65493$77ad2740$65fd24c0@Eric><442DC9B6.2090200@paradise.net.nz> <442EAA0A.8030704@he.iki.fi> <442F0E1B.9090505@paradise.net.nz> <027f01c657f4$0d0a66a0$65fd24c0@Eric>
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4.x, SMP and performance don't really live in the same box :-) Pete Eric wrote: > Sorry for time to answer, here is result in both case (with/withou > SMP) with freebsd 4.11 : > > kern.timecounter.method: 0 > kern.timecounter.hardware: i8254 > > > If you want I can do new installation with freebsd 6.0 > > Thanks, > > Eric. > > > > > ----- Original Message ----- From: "Mark Kirkwood" > <markir@paradise.net.nz> > To: "Petri Helenius" <pete@he.iki.fi> > Cc: "Eric" <ericd@free.fr>; <freebsd-smp@freebsd.org>; "Lucas Holt" > <luke@foolishgames.com> > Sent: Sunday, April 02, 2006 1:34 AM > Subject: Re: Low perf with smp > > >> Petri Helenius wrote: >>> Mark Kirkwood wrote: >>> >>>> >>>> As I understand it, when you activate SMP a more accurate, but >>>> slower timecounter is chosen (typically 'i8254' instead of 'TSC' on >>>> intel HW). >>> >>> >>> ACPI-fast should be the default with SMP. It's significantly faster >>> than i8254 >>> >> >> Yeah - if his Dell has ACPI enabled. However, ACPI-fast is still >> slower than say TSC. >> >> Eric, do you want to show us the output of >> >> $ sysctl kern.timecounter >> >> with and without SMP? >> >> Cheers >> >> Mark >> _______________________________________________ >> freebsd-smp@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-smp >> To unsubscribe, send any mail to "freebsd-smp-unsubscribe@freebsd.org" >> > >
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