From: Keith Owens <kaos@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: [Linux-ia64] Re: ia64_spinlock_contention and NEW_LOCK
Date: Wed, 12 Mar 2003 21:51:04 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590709806073@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590709806055@msgid-missing>
On Wed, 12 Mar 2003 09:27:14 -0800,
David Mosberger <davidm@napali.hpl.hp.com> wrote:
>>>>>> On Wed, 12 Mar 2003 21:19:37 +1100, Keith Owens <kaos@sgi.com> said:
>
> Keith> The inline code for an uncontended lock drops from 5 to 4
> Keith> bundles for each use of spin_lock(). The uncontended path
> Keith> has one less memory access.
>
>For McKinley and later, you can use brl to avoid the
>movl/indirect-branch combo.
That brings the uncontended code path down to 3 bundles :)
next prev parent reply other threads:[~2003-03-12 21:51 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-12 10:19 [Linux-ia64] Re: ia64_spinlock_contention and NEW_LOCK Keith Owens
2003-03-12 10:35 ` Keith Owens
2003-03-12 17:27 ` David Mosberger
2003-03-12 21:18 ` Keith Owens
2003-03-12 21:51 ` Keith Owens [this message]
2003-03-13 19:16 ` David Mosberger
2003-03-13 21:59 ` Keith Owens
2003-03-13 22:14 ` David Mosberger
2003-03-13 22:20 ` Keith Owens
2003-03-13 22:26 ` David Mosberger
2003-03-13 22:42 ` Keith Owens
2003-03-13 22:46 ` David Mosberger
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