[lkml]   [2003]   [Feb]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectScheduling with Hyperthreading

Sorry, should have been more specific. I am referring to the scheduler.
I have noticed
that if I run two compute intensive jobs on a Dual Xeon, the processes
run on separate
physical cpus and can spend a significant amount of time with both on a
cpu. I have seen some patches that try to improve on this and was
wondering if
they have made it into the production kernel stream. I ran tests on a
2.4.20 kernel and
it had the same problem as a 2.4.18 kernel.



William Lee Irwin III wrote:

>On Mon, 24 Feb 2003, Mike Sullivan wrote:
>>>What kernel versions will attempt to distribute jobs across physical CPUs on
>>>Xeon SMP configurations.
>On Mon, Feb 24, 2003 at 10:45:18PM -0700, James Bourne wrote:
>>From what I've heard, Arjans' user space daemon might be the way
>>things are going, it's at .
>>The other way that you might try is the irq load balance patch that Ingo
>>produced. There is a patch that is from 2.4.20 at
>> and it is what I'm using at work on
>>our current Xeon systems (until I have the chance to test the user space
>>daemon at least).
>I think he's referring to the cpu scheduler, not interrupt load
>balancing. mingo might have some insight into current patches for
>this and current results thereof. I don't really participate in
>the scheduler aside from very occasional bugfixing.
>-- wli

Mike Sullivan Director Performance Computing
@lliance Technologies, Voice: (416) 385-3255,
18 Wynford Dr, Suite 407 Fax: (416) 385-1774
Toronto, ON, Canada, M3C-3S2 Toll Free:1-877-216-3199

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:33    [W:0.050 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site