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From: Andi Kleen <ak@suse.de>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, shai@scalex86.org, kiran@scalex86.org
Subject: Re: [patch] Cache align futex hash buckets
Date: 21 Feb 2006 15:44:30 +0100	[thread overview]
Message-ID: <p738xs44vqp.fsf@verdi.suse.de> (raw)
In-Reply-To: <20060220170940.1496e1d5.akpm@osdl.org>

Andrew Morton <akpm@osdl.org> writes:
> 
> Well it's your architecture...  As long as you're finding this to be a
> sufficiently large problem in testing to justify consuming a meg of memory
> then fine, let's do it.

I think it's a waste of memory even with 128 byte cache lines. 

If it's really a big problem. Some more clever solution would be
better. e.g. allocate a hash table per node and use a hierarchical
hash, trying to put stuff into the local node first.

-Andi

  parent reply	other threads:[~2006-02-21 14:44 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-02-20 23:32 [patch] Cache align futex hash buckets Ravikiran G Thirumalai
2006-02-20 23:33 ` Andrew Morton
2006-02-20 23:34   ` Andrew Morton
2006-02-21  0:09     ` Ravikiran G Thirumalai
2006-02-21  0:23       ` Andrew Morton
2006-02-21  1:04         ` Ravikiran G Thirumalai
2006-02-21  1:09           ` Andrew Morton
2006-02-21  1:39             ` Ravikiran G Thirumalai
2006-02-21 14:44             ` Andi Kleen [this message]
2006-02-21  3:30 ` Nick Piggin
2006-02-21 18:33   ` Christoph Lameter
2006-02-21 23:14     ` Christoph Lameter
2006-02-22  0:40     ` Nick Piggin
2006-02-22  2:08       ` Andrew Morton
2006-02-22  2:35         ` Ravikiran G Thirumalai
2006-02-22  2:37         ` Nick Piggin
2006-02-22 20:17           ` Ravikiran G Thirumalai
2006-02-22 20:50             ` Andrew Morton
     [not found]               ` <20060223015144.GC3663@localhost.localdomain>
2006-02-23  2:08                 ` Ravikiran G Thirumalai
2006-02-21 20:20   ` Ravikiran G Thirumalai
2006-02-22  0:45     ` Nick Piggin
2006-02-22  2:09       ` Andrew Morton

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