From: Davide Libenzi <davidel@xmailserver.org>
To: Rik van Riel <riel@conectiva.com.br>
Cc: Manfred Spraul <manfred@colorfullife.com>,
Andrea Arcangeli <andrea@suse.de>,
linux-kernel@vger.kernel.org, Alan Cox <alan@lxorguk.ukuu.org.uk>,
torvalds@transmeta.com
Subject: Re: Purpose of the mm/slab.c changes
Date: Sun, 09 Sep 2001 13:58:44 -0700 (PDT) [thread overview]
Message-ID: <XFMail.20010909135844.davidel@xmailserver.org> (raw)
In-Reply-To: <Pine.LNX.4.33L.0109091745130.21049-100000@duckman.distro.conectiva>
On 09-Sep-2001 Rik van Riel wrote:
> On Sun, 9 Sep 2001, Davide Libenzi wrote:
>
>> Do You see it as a plus ?
>> The new allocated slab will be very likely written ( w/o regard
>> about the old content ) and an L2 mapping will generate
>> invalidate traffic.
>
> If your invalidates are slower than your RAM, you should
> consider getting another computer.
You mean a Sun, that uses a separate bus for snooping ? :)
Besides to not under estimate the cache coherency traffic ( that on many CPUs
uses the main memory bus ) there's the fact that the old data eventually
present in L2 won't be used by the new slab user.
- Davide
next prev parent reply other threads:[~2001-09-09 20:56 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-09 11:05 Purpose of the mm/slab.c changes Manfred Spraul
2001-09-09 14:26 ` Andrea Arcangeli
2001-09-09 15:18 ` Manfred Spraul
2001-09-09 15:33 ` Andrea Arcangeli
2001-09-11 18:41 ` Manfred Spraul
2001-09-11 19:36 ` Andrea Arcangeli
2001-09-11 20:43 ` Manfred Spraul
2001-09-12 14:18 ` Andrea Arcangeli
2001-09-09 16:12 ` Alan Cox
2001-09-09 16:25 ` Linus Torvalds
2001-09-09 16:47 ` Alan Cox
2001-09-09 16:55 ` Manfred Spraul
2001-09-09 17:01 ` Linus Torvalds
2001-09-09 17:22 ` Manfred Spraul
2001-09-09 17:27 ` arjan
2001-09-09 17:35 ` Andrea Arcangeli
2001-09-09 17:30 ` Andrea Arcangeli
2001-09-09 17:59 ` Fwd: 2.4.10-pre6 ramdisk driver broken? won't compile Stephan Gutschke
2001-09-09 20:26 ` Purpose of the mm/slab.c changes Rik van Riel
2001-09-15 0:29 ` Albert D. Cahalan
2001-09-09 20:23 ` Rik van Riel
2001-09-09 20:44 ` Davide Libenzi
2001-09-09 20:45 ` Rik van Riel
2001-09-09 20:58 ` Davide Libenzi [this message]
2001-09-22 12:28 ` Ralf Baechle
2001-09-22 21:03 ` Davide Libenzi
2001-09-22 21:36 ` David S. Miller
2001-09-10 2:28 ` Daniel Phillips
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