On Mon, 1 Aug 2011, David Rientjes wrote:

On Mon, 1 Aug 2011, Pekka Enberg wrote:

quoted

Btw, I haven't measured this recently but in my testing, SLAB has
pretty much always used more memory than SLUB. So 'throwing more
memory at the problem' is definitely a reasonable approach for SLUB.

Yes, slub _did_ use more memory than slab until the alignment of
struct page.  That cost an additional 128MB on each of these 64GB
machines, while the total slab usage on the client machine systemwide is
~75MB while running netperf TCP_RR with 160 threads.

I guess that calculation did not include metadata structures (alien caches
and the NR_CPU arrays in kmem_cache) etc? These are particularly costly on SLAB.

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>