From: Arjan van de Ven <arjan@infradead.org>
To: Tymm Twillman <ttwillman@penguincomputing.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.4, 2.6, i686/athlon and LDT's
Date: Mon, 27 Dec 2004 21:22:16 +0100 [thread overview]
Message-ID: <1104178937.4187.16.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <41D0668B.206@penguincomputing.com>
On Mon, 2004-12-27 at 11:46 -0800, Tymm Twillman wrote:
> Hi all,
>
> It appears that use of the LDT is to speed up context switching between
> threads, although I haven't even found especially good references WRT
> that. I have looked through the info in the IA Developers publications
> and have whacked my head against Google quite a bit. However, every bit
> of clarity I've found there has been offset by new confuzled bits.
LDT's are *slow*. That's why glibc will try to avoid using them
nowadays, and with 2.6 it won't; as for 2.4.. it depends if you use a
vendor 2.4 it might be able to avoid using LDT's as well.
next prev parent reply other threads:[~2004-12-27 20:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-27 19:46 Tymm Twillman
2004-12-27 20:22 ` Arjan van de Ven [this message]
2004-12-27 20:55 ` Brian Gerst
2004-12-27 21:29 ` Arjan van de Ven
2004-12-27 23:44 ` Ulrich Drepper
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