Re: Scalability requirements for sysv ipc

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To: Mike Galbraith <efault@...>
Cc: <paulmck@...>, Nadia Derbey <Nadia.Derbey@...>, Linux Kernel Mailing List <linux-kernel@...>, Andrew Morton <akpm@...>
Date: Saturday, March 22, 2008 - 6:10 am

Mike Galbraith wrote:
Ouch - 71% slowdown with just 4 cores. Wow.
Attached are my own testapps: one for sysv msg, one for sysv sem.
Could you run them? Taskset is done internally, just execute

$ for i in 1 2 3 4;do ./psem $i 5;./pmsg $i 5;done

Only tested on uniprocessor, I hope the pthread_setaffinity works as 
expected....

--
    Manfred
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Messages in current thread:
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Fri Mar 21, 9:33 am)
Re: Scalability requirements for sysv ipc, Nadia Derbey, (Tue Mar 25, 12:00 pm)
Re: Scalability requirements for sysv ipc, Paul E. McKenney, (Fri Mar 21, 10:13 am)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Fri Mar 21, 12:08 pm)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sat Mar 22, 1:43 am)
Re: Scalability requirements for sysv ipc, Bill Davidsen, (Thu Mar 27, 6:29 pm)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Fri Mar 28, 5:49 am)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Sat Mar 22, 6:10 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sat Mar 22, 7:53 am)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Sat Mar 22, 10:22 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sat Mar 22, 3:35 pm)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sun Mar 23, 3:08 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sun Mar 23, 3:20 am)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Sun Mar 23, 2:38 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sun Mar 23, 3:15 am)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Sat Mar 22, 3:08 pm)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Tue Mar 25, 11:50 am)
Re: Scalability requirements for sysv ipc, Peter Zijlstra, (Tue Mar 25, 12:13 pm)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Wed Mar 26, 2:18 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Tue Mar 25, 2:31 pm)