I just confirmed that this is due to memory allocation locking in the
kernel. If your places do no allocation then all is fine.

Paulo Matos

On 08/10/2018 21:39, James Platt wrote:
> I wonder if this has anything to do with mitigation for Spectre, Meltdown or 
> the other speculative execution vulnerabilities that have been identified 
> recently.  I understand that some or all of the patches affect the 
> performance of multi-CPU processing in general.
> James  

Paulo Matos

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