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Date: Sat, 24 Dec 2011 08:51:09 -0800
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From: Adrian Chadd <adrian@freebsd.org>
To: Daniel Kalchev <daniel@digsys.bg>
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Cc: freebsd-stable@freebsd.org, Andriy Gapon <avg@freebsd.org>,
	Steve Kargl <sgk@troutmask.apl.washington.edu>
Subject: Re: SCHED_ULE should not be the default
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My rule is "break it any way you can and see if you can figure out why."

Don't be discouraged. You may find some of the folk at yahoo are interested.


Adrian

On 24 December 2011 03:00, Daniel Kalchev <daniel@digsys.bg> wrote:
>
> On Dec 24, 2011, at 12:49 AM, Adrian Chadd wrote:
>
>> Do you not have access to anything with 8 CPUs in it? It'd be nice to
>> get clarification that this indeed was fixed.
>
> I offered to do tests on 4x8 core Opteron system (32 cores total), but was discouraged that contention would be too much and results meaningless -- yet, such systems will be more and more popular.
>
>> Does ULE care (much) if the nodes are hyperthreading or real cores?
>> Would that play a part in what it tries to schedule/spread?
>
> I could also run the tests on 2x4x2 cores Xeon, which uses hyper threading, 8 real or 16 virtual cores in total.
>
> I can torture both systems (actually two pairs) for a week or two. But I may not have enough time to prepare the core/setup so any advice is greatly appreciated. Be more descriptive :)
>
> Daniel