Messages in this thread | | | Date | Tue, 13 Nov 2012 10:18:30 -0500 | From | Prarit Bhargava <> | Subject | Re: RCU NOHZ, tsc, and clock_gettime |
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On 11/12/2012 06:27 PM, John Stultz wrote:
> Hey Prarit, > Just back from being on leave, and wanted to check in on this. Did you ever > get to run with an increase sample size to see how that affected things? Its > exactly your point that the non-NOHZ case could align the execution of a short > run in a way that you always see good results, where as with NOHZ the alignment > might not be the same, so you see periodic delays from timer interrupts, etc. > > Anyway, let me know if this got resolved or not.
Hey John,
I never did narrow this down, although this "disappears" with the move to the lower resolution patches in upstream. I have not, however, done any testing to see if the situation is actually resolved or if we just reduced the problem by a factor of 1000 ;)
P.
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