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A comment on OpenZFS: Reducing ARC Lock Contention.

Re:OpenZFS: Reducing ARC Lock Contention by WatchDog on Monday March 23, 2015 @08:04PM (#9254120)
While the single benchmark provided probably isn't statistically significant, I noticed that performance on system with 4 cores of less is worse with this patch.

If this is actually symptom of the patch, would it be possible to toggle lock behavior depending on available cores?

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Re:OpenZFS: Reducing ARC Lock Contention by prakashsurya on Monday March 23, 2015 @08:30PM (#9254210)
Currently, the number of sublists created is equal to the number of cores on the system.

While it'd be fairly trivial to extend the code to make it easy for an admin to define the number of sublists, I don't have any reason to believe that'd be a useful knob to export.

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