Home » Mailing list archives » linux-kernel » 2008 » March » 22

Re: Scalability requirements for sysv ipc

!MAILaRCHIVE_VOTE_RePLACE
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
[view in full thread]
From: Manfred Spraul <manfred@...>
To: Linux Kernel Mailing List <linux-kernel@...>
Cc: Mike Galbraith <efault@...>, <paulmck@...>, Nadia Derbey <Nadia.Derbey@...>, Andrew Morton <akpm@...>
Subject: Re: Scalability requirements for sysv ipc
Date: Saturday, March 22, 2008 - 3:08 pm

Hi all,

I've revived my Dual-CPU Pentium III/850:
I couldn't notice a scalability-problem (two cpus are around 190%, but 
just the normal performance of 2.6.25-rc3 is abyssimal, 55 to 60% slower 
than 2.6.18.8:

psem    2.6.18  2.6.25  Diff [%]
1 cpu   948.005 398.435 -57,97
2 cpus  1.768.273       734.816 -58,44
Scalability [%] 193,26   192,21
                       
pmsg    2.6.18  2.6.25  Diff [%]
1 cpu   821.582 356.904 -56,56
2 cpus  1.488.058       661.754 -55,53
Scalability [%] 190,56   192,71

Attached are the .config files and the individual results.
Did I accidentially enable a scheduler debug option?

--
    Manfred
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
Messages in current thread:
Scalability requirements for sysv ipc (was: ipc: store ipcs ..., Manfred Spraul, (Fri Mar 21, 5:41 am)
Re: Scalability requirements for sysv ipc (was: ipc: store i..., Nadia Derbey, (Fri Mar 21, 8:45 am)
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 (+namespaces broke..., Manfred Spraul, (Sun Mar 30, 10:12 am)
Re: Scalability requirements for sysv ipc (+namespaces broke..., Mike Galbraith, (Sun Mar 30, 1:18 pm)
Re: Scalability requirements for sysv ipc (+namespaces broke..., Nadia Derbey, (Fri Apr 4, 10:59 am)
Re: Scalability requirements for sysv ipc (+namespaces broke..., Nadia Derbey, (Fri Apr 4, 11:03 am)
Re: Scalability requirements for sysv ipc (+namespaces broke..., David Newall, (Sun Mar 30, 11:21 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)