lkml.org 
[lkml]   [2002]   [Mar]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] Futexes IV (Fast Lightweight Userspace Semaphores)
Date
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)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:24    [W:0.254 / U:0.136 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site