Re: Low perf with smp
Petri Helenius <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.smp |
|---|---|
| Message-ID | <[email protected]> |
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" > <[email protected]> > To: "Petri Helenius" <[email protected]> > Cc: "Eric" <[email protected]>; <[email protected]>; "Lucas Holt" > <[email protected]> > 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 >> _______________________________________________ >> [email protected] mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-smp >> To unsubscribe, send any mail to "[email protected]" >> > > _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-smp To unsubscribe, send any mail to "[email protected]"