only one logical CPU used in Xeon
Robert Heron
robert at heron.pl
Tue Mar 10 09:28:21 PDT 2009
Hyperthreading is enabled in BIOS, but the variable:
machdep.hyperthreading_allowed
is '0' by default in FreeBSD 6.2R :(((
I just changed it now to '1' and all cores in all CPUs started to
work :)))
Very simple change and so much power more :)
Thanks a lot for this hint!!
Regards,
Robert
On Mar 10, 2009, at 3:19 PM, Lucas Holt wrote:
> Have you tried the hyperthreading setting?
>
> machdep.hyperthreading_allowed=1
> (put that in /etc/sysctl.conf)
>
> On Mar 10, 2009, at 6:40 AM, Robert Heron wrote:
>
>> Hi,
>>
>> I have FreeBSD 6.2R running on Intel SE7501HG2 motherboard with two
>> Xeon installed.
>> System detects 2 CPUs with 2 cores in each of them (total 4 cores)
>> but it uses only one core in each Xeon (total 2 of 4 cores are used
>> only).
>> I see it in the 'top'. I tried the same hardware on FreeBSD 7.1R
>> and this OS uses all of the detected cores.
>>
>> What should I do FreeBSD 6.2R to use all of the available cores?
>> I cannot upgrade it to 7.x, must use 6.x
>>
>> Regards,
>> Robert Heron
>>
>> _______________________________________________
>> freebsd-smp at freebsd.org mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-smp
>> To unsubscribe, send any mail to "freebsd-smp-
>> unsubscribe at freebsd.org"
>
>
>
> Lucas Holt
> Luke at FoolishGames.com
> ________________________________________________________
> MidnightBSD.org (Free OS)
> JustJournal.com (Free blogging)
>
>
More information about the freebsd-smp
mailing list