Re: [RFC] Simple Slab: A slab allocator with minimal metainformation
From: KAMEZAWA Hiroyuki
Date: Thu Aug 10 2006 - 02:08:54 EST
On Thu, 10 Aug 2006 14:44:51 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote:
> > If you do that then you loose the cache hot advantage. It is advantageous
> > to initialize the object and then immediately use it. If you initialize it
> > before then the cacheline will be evicted and then brought back.
> hmm, I don't know precise analization of the perfromance benefit of slab on
> current (Linux + Fast CPU/Bus + Large Cache) systems. I'm grad if you show the
> performance of new "Simple Slab" next time.
BTW, in recent Linux, many objects are freed by call_rcu(hoo, dealyed_free_foo).
Objects are freed far after it was touched.
I think catching this kind of freeing will not boost performance by cache-hit if
reuse freed page (object).
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