Messages in this thread | | | Date | Sat, 24 Feb 2007 14:28:35 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: SLUB: The unqueued Slab allocator |
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On Thu, 22 Feb 2007 10:42:23 -0800 (PST) Christoph Lameter <clameter@sgi.com> wrote:
> > > G. Slab merging > > > > > > We often have slab caches with similar parameters. SLUB detects those > > > on bootup and merges them into the corresponding general caches. This > > > leads to more effective memory use. > > > > Did you do any tests on what that does to long term memory fragmentation? > > It is against the "object of same type have similar livetime and should > > be clustered together" theory at least. > > I have done no tests in that regard and we would have to assess the impact > that the merging has to overall system behavior. > From a viewpoint of a crash dump user, this merging will make crash dump investigation very very very difficult. So please avoid this merging if the benefit is nog big.
-Kame
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