SCHED_ULE should not be the default

Daniel Kalchev daniel at digsys.bg
Sat Dec 24 11:00:45 UTC 2011


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


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