Messages in this thread | | | Date | Tue, 13 Dec 2005 14:29:56 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: [PATCH] Cpuset: rcu optimization of page alloc hook |
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On Tue, 13 Dec 2005, Paul Jackson wrote:
> Eric wrote: > > struct kmem_cache itself will be about 512*8 + some bytes > > then for each cpu a 'struct array_cache' will be allocated (count 128 bytes > > Hmmm ... 'struct array_cache' looks to be about 6 integer words, > so if that is the main per-CPU cost, the minimal cost of a slab > cache (once created, before use) is about 24 bytes per cpu. > > But whether its 24 or 128 bytes per cpu, that's a heavier weight > hammer than is needed here.
The main per node costs is struct kmem_list3 on top of the array_cache.
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