From: Hubertus Franke <frankeh@watson.ibm.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>,
torvalds@transmeta.com (Linus Torvalds)
Cc: rusty@rustcorp.com.au (Rusty Russell), linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Futexes IV (Fast Lightweight Userspace Semaphores)
Date: Fri, 8 Mar 2002 17:55:20 -0500 [thread overview]
Message-ID: <20020308225425.772D13FE06@smtp.linux.ibm.com> (raw)
In-Reply-To: <E16jRAU-0007QU-00@the-village.bc.nu>
In-Reply-To: <E16jRAU-0007QU-00@the-village.bc.nu>
On Friday 08 March 2002 03:40 pm, Alan Cox wrote:
> > So I would suggest making the size (and thus alignment check) of locks at
> > least 8 bytes (and preferably 16). That makes it slightly harder to put
> > locks on the stack, but gcc does support stack alignment, even if the
> > code sucks right now.
>
> Can we go to cache line alignment - for an array of locks thats clearly
> advantageous
NO and let me explain.
I would to be able to integrate the lock with the data.
This is much more cache friendly then putting the lock on a different
cacheline.
If you want an array you need to pad each element.
That's easy enough to do....
Can't shrink a datastructure on the other hand :-)
--
-- Hubertus Franke (frankeh@watson.ibm.com)
next prev parent reply other threads:[~2002-03-08 22:54 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-05 7:01 [PATCH] Futexes IV (Fast Lightweight Userspace Semaphores) Rusty Russell
2002-03-05 21:23 ` Futexes III : performance numbers Hubertus Franke
2002-03-06 2:08 ` Rusty Russell
2002-03-06 14:28 ` Hubertus Franke
2002-03-06 17:23 ` [Lse-tech] " george anzinger
2002-03-07 0:25 ` Hubertus Franke
2002-03-07 0:35 ` Hubertus Franke
2002-03-06 7:54 ` Rusty Russell
2002-03-06 14:46 ` Hubertus Franke
2002-03-06 16:13 ` Hubertus Franke
2002-03-06 20:36 ` Futexes V : Hubertus Franke
2002-03-07 4:21 ` Rusty Russell
2002-03-05 22:39 ` [PATCH] Futexes IV (Fast Lightweight Userspace Semaphores) Davide Libenzi
2002-03-05 23:16 ` Hubertus Franke
2002-03-05 23:26 ` Davide Libenzi
2002-03-05 23:37 ` Peter Svensson
2002-03-05 23:50 ` Davide Libenzi
2002-03-08 0:07 ` Richard Henderson
2002-03-06 1:46 ` Rusty Russell
2002-03-06 2:03 ` Davide Libenzi
2002-03-08 18:07 ` Linus Torvalds
2002-03-08 19:03 ` Hubertus Franke
2002-03-08 19:22 ` Linus Torvalds
2002-03-08 20:29 ` Hubertus Franke
2002-03-08 20:48 ` Matthew Kirkwood
2002-03-08 21:02 ` Linus Torvalds
2002-03-08 23:15 ` Hubertus Franke
2002-03-08 23:36 ` Alan Cox
2002-03-08 23:41 ` Linus Torvalds
2002-03-08 23:56 ` Hubertus Franke
2002-03-09 2:12 ` Linus Torvalds
2002-03-11 14:14 ` Hubertus Franke
2002-03-09 0:03 ` H. Peter Anvin
2002-03-09 1:15 ` Alan Cox
2002-03-10 19:41 ` Linus Torvalds
2002-03-11 20:49 ` Pavel Machek
2002-03-13 7:40 ` Rusty Russell
2002-03-13 16:37 ` Alan Cox
2002-03-10 19:58 ` Martin J. Bligh
2002-03-10 20:40 ` Alan Cox
2002-03-10 20:28 ` Martin J. Bligh
2002-03-10 21:05 ` Alan Cox
2002-03-12 9:35 ` Helge Hafting
2002-03-08 20:40 ` Alan Cox
2002-03-08 20:57 ` Linus Torvalds
2002-03-08 23:43 ` H. Peter Anvin
2002-03-08 22:55 ` Hubertus Franke [this message]
2002-03-08 23:38 ` Alan Cox
2002-03-08 23:44 ` H. Peter Anvin
2002-03-08 20:47 ` george anzinger
2002-03-08 23:02 ` Hubertus Franke
2002-03-08 23:47 ` george anzinger
2002-03-09 1:11 ` Alan Cox
2002-03-09 1:20 ` Linus Torvalds
2002-03-09 4:49 ` Rusty Russell
2002-03-11 22:45 ` Linus Torvalds
2002-03-11 23:12 ` Hubertus Franke
2002-03-12 7:20 ` Rusty Russell
2002-03-12 14:56 ` Hubertus Franke
2002-03-13 4:02 ` Rusty Russell
2002-03-12 17:17 ` Linus Torvalds
2002-03-13 2:57 ` Rusty Russell
2002-03-09 4:51 ` Rusty Russell
-- strict thread matches above, loose matches on Subject: below --
2002-03-13 9:12 Martin Wirth
2002-03-13 19:41 ` Bill Davidsen
2002-03-13 19:52 ` Dave McCracken
2002-03-13 22:17 ` Bill Davidsen
2002-03-13 20:06 ` Alan Cox
2002-03-15 7:31 ` Rusty Russell
2002-03-15 8:41 ` Martin Wirth
2002-03-15 15:29 ` Hubertus Franke
2002-03-15 16:23 ` Peter Wächtler
2002-03-16 0:12 ` Rusty Russell
2002-03-16 11:23 ` Martin Wirth
2002-03-17 6:50 ` Rusty Russell
2002-03-18 0:52 ` Ulrich Drepper
2002-03-19 3:28 ` Rusty Russell
2002-03-19 4:05 ` Ulrich Drepper
2002-03-20 6:20 ` Rusty Russell
2002-03-20 10:42 ` Peter Wächtler
2002-03-20 17:20 ` Ulrich Drepper
2002-03-19 8:34 ` Martin Wirth
2002-03-20 6:45 ` Rusty Russell
2002-03-21 6:48 ` Martin Wirth
2002-03-24 18:25 ` Peter Wächtler
2002-03-25 2:28 ` Rusty Russell
2002-03-25 4:46 ` Rusty Russell
2002-03-25 11:56 ` Peter Wächtler
2002-03-26 1:02 ` Rusty Russell
2002-03-26 8:17 ` Martin Wirth
2002-03-26 23:10 ` Rusty Russell
2002-03-27 21:05 ` Hubertus Franke
2002-03-27 23:53 ` Rusty Russell
2002-03-25 9:47 ` Peter Wächtler
2002-03-16 19:48 ` Peter Wächtler
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