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
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