Re: [PATCH v2] slub: move kmem_cache_node into it's own cacheline

Pekka Enberg
2010-05-22T08:35:53Z

Alexander Duyck wrote:
> This patch is meant to improve the performance of SLUB by moving the local
> kmem_cache_node lock into it's own cacheline separate from kmem_cache.
> This is accomplished by simply removing the local_node when NUMA is enabled.
>
> On my system with 2 nodes I saw around a 5% performance increase w/
> hackbench times dropping from 6.2 seconds to 5.9 seconds on average. I
> suspect the performance gain would increase as the number of nodes
> increases, but I do not have the data to currently back that up.
>
> Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>

Thanks for the fix, Alexander!

Yanmin and Alex, can I have your Tested-by or Acked-by please so we can
close "[Bug #15713] hackbench regression due to commit 9dfc6e68bfe6e"
after this patch is merged?

Pekka