Re: [PATCH] Reduce vm_stat cacheline contention in__vm_enough_memory

[Christoph Lameter]

On Fri, 14 Oct 2011, Dimitri Sivanich wrote:

> Testing on a smaller machine with 46 writer threads in parallel (my original
> test used 120).
>
> Looks as though cache-aligning and padding the end of the vm_stat array
> results in a ~150 MB/sec speedup.  This is a nice improvement for only 46
> writer threads, though it's not the full ~250 MB/sec speedup I get from
> setting OVERCOMMIT_NEVER.

Add to this the increase in the deltas for the ZVCs and change the stat
interval to 10 sec?

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