I know Pete but I downgrad because when installing 6.0 performance was half
than with 4.11.
I done tests and tests but still have very low perfs. I then downdgrad to
4.11 to see if it came from hardware or software.
Conclusion is that my test wich is consist of loop of mysql query done by a
php script take :
- 32 sec with 4.11 without SMP
- 54 sec with 4.11 with SMP
- 62 sec with 6.0 or 6.1 beta 4
That's why actually I'm with 4.11.
If you have any idea how improve perfs with 6.0 it will be a pleasure.
Hardware is new dell 1850 with bi-xeon dualcore 2.8Ghz and scsi 15.000t HDD
on raid1 perc4si 256Mo controller.
Eric.
----- Original Message -----
From: "Petri Helenius" <[EMAIL PROTECTED]>
To: "Eric" <[EMAIL PROTECTED]>
Cc: "Lucas Holt" <[EMAIL PROTECTED]>; <[email protected]>; "Mark
Kirkwood" <[EMAIL PROTECTED]>
Sent: Tuesday, April 04, 2006 4:41 PM
Subject: Re: Low perf with smp
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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