On 04/24/2014 12:17 PM, John Hearns wrote:
I am with Joe regarding looking at the interrupts.
However, could this be a difference with the power management with the
Redhat kernel?
ie. when running on 8 cores you are tripping over some thermal threshold
and causing a throttle back to a lower C-state?
Yeah, that was the other thing I'd forgotten about. Might want to tweak
Cstates to C1. It could be going over-power and throttling. Turn of
ASPM and other (fairly painful) things.
--
Joseph Landman, Ph.D
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Scalable Informatics, Inc.
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