lkml.org 
[lkml]   [2013]   [Mar]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: ipc,sem: sysv semaphore scalability
On 03/21/2013 09:23 PM, Linus Torvalds wrote:
> On Thu, Mar 21, 2013 at 6:12 PM, Davidlohr Bueso <davidlohr.bueso@hp.com> wrote:
>>
>> ipc lock contention:
>> 100 users: 8,74% (vanilla) 3.17% (v3 patchset)
>> 400 users: 21,86% (vanilla) 5.23% (v3 patchset)
>> 800 users 84,35% (vanilla) 7.39% (v3 patchset)
>
> Ok, I'd call that pretty much "solved". Sure, it's still visible, but
> for being a benchmark that apparently does little else than pound on
> those sysv semaphores, I think we can consider it pretty much fine.
> I'm going to assume that anybody who actually then does any real work
> (ie a database) is never going to see even close to this bad
> contention.
>
> Good job, Rik. I'm assuming we'll be merging this during the 3.10
> merge window, and hopefully the merge conflicts will be sorted out
> too. Rik, Peter, can you look at each others patches and see if you
> can get that sorted out for Andrew?

Will do.

I will rebase this series on top of what is in linux-next.

--
All rights reversed.


\
 
 \ /
  Last update: 2013-03-22 05:21    [W:0.150 / U:1.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site