From: Andrea Arcangeli <andrea@suse.de>
To: Manfred Spraul <manfred@colorfullife.com>
Cc: Arjan van de Ven <arjan@fenrus.demon.nl>, linux-kernel@vger.kernel.org
Subject: Re: -mmX 4G patches feedback [numbers: how much performance impact]
Date: Tue, 6 Apr 2004 20:41:41 +0200 [thread overview]
Message-ID: <20040406184141.GH2234@dualathlon.random> (raw)
In-Reply-To: <4072EFEE.6050907@colorfullife.com>
On Tue, Apr 06, 2004 at 07:59:10PM +0200, Manfred Spraul wrote:
> Does AMD document how the CAM filter actually works? x86-64 writes into
> the 4th level page table during a context switch and if I understand the
> patent description correctly, this defeates the flush filter and forces
> a full flush during a context switch.
this is something we discussed a few times during the early x86-64
development. The main question you should answer is what gains you to do
a partial flush if the only non global entries have to be flushed
anyways?
next prev parent reply other threads:[~2004-04-06 18:41 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-06 17:59 Manfred Spraul
2004-04-06 18:41 ` Andrea Arcangeli [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-04-05 16:36 -mmX 4G patches feedback Eric Whiting
2004-04-05 17:46 ` Andrea Arcangeli
2004-04-05 21:35 ` Eric Whiting
2004-04-05 22:16 ` Andrea Arcangeli
2004-04-06 11:55 ` -mmX 4G patches feedback [numbers: how much performance impact] Ingo Molnar
2004-04-06 14:49 ` Eric Whiting
2004-04-06 15:59 ` Andrea Arcangeli
2004-04-06 16:13 ` Arjan van de Ven
2004-04-06 16:39 ` Andrea Arcangeli
2004-04-06 17:24 ` Ingo Molnar
2004-04-06 17:57 ` Andrea Arcangeli
2004-04-07 22:54 ` Martin J. Bligh
2004-04-07 22:50 ` Andrea Arcangeli
2004-04-06 19:25 ` Ingo Molnar
2004-04-06 20:25 ` Andrea Arcangeli
2004-04-07 6:03 ` Andrea Arcangeli
2004-04-07 6:46 ` Ingo Molnar
2004-04-07 7:23 ` Andrea Arcangeli
2004-04-07 8:23 ` Ingo Molnar
2004-04-07 21:35 ` Andrea Arcangeli
2004-04-07 17:27 ` Andrea Arcangeli
2004-04-07 7:25 ` Ingo Molnar
2004-04-07 21:39 ` Andrea Arcangeli
2004-04-07 22:58 ` Martin J. Bligh
2004-04-07 23:01 ` Andrea Arcangeli
2004-04-07 23:21 ` Martin J. Bligh
2004-04-07 23:18 ` Andrea Arcangeli
2004-04-07 23:34 ` Martin J. Bligh
2004-04-08 0:18 ` Andrea Arcangeli
2004-04-08 6:24 ` Martin J. Bligh
2004-04-08 21:59 ` Andrea Arcangeli
2004-04-08 22:19 ` Martin J. Bligh
2004-04-08 22:19 ` Andrea Arcangeli
2004-04-08 23:14 ` Martin J. Bligh
2004-04-08 23:22 ` Andrea Arcangeli
2004-04-08 23:42 ` Martin J. Bligh
2004-04-08 23:49 ` Andrea Arcangeli
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