SCHED_ULE should not be the default
adrian at freebsd.org
Fri Dec 23 22:49:53 UTC 2011
On 23 December 2011 11:11, Steve Kargl <sgk at troutmask.apl.washington.edu> wrote:
> Ah, so goods news! I cannot reproduce this problem that
> I saw 3+ years ago on the 4-cpu node, which is currently
> running a ULE kernel. When I killed the (N+1)th job,
> the N remaining jobs are spread across the N cpus.
> One difference between the 2008 tests and today tests is
> the number of available cpus. In 2008, I ran the tests
> on a node with 8 cpus, while today's test used only a
> node with only 4 cpus. If this behavior is a scaling
> issue, I can't currently test it. But, today's tests
> are certainly encouraging.
Do you not have access to anything with 8 CPUs in it? It'd be nice to
get clarification that this indeed was fixed.
Does ULE care (much) if the nodes are hyperthreading or real cores?
Would that play a part in what it tries to schedule/spread?
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