Re: Scalability requirements for sysv ipc

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
From: Manfred Spraul
Date: Saturday, March 22, 2008 - 12:08 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:
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Fri Mar 21, 6:33 am)
Re: Scalability requirements for sysv ipc, Paul E. McKenney, (Fri Mar 21, 7:13 am)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Fri Mar 21, 9:08 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Fri Mar 21, 10:43 pm)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Sat Mar 22, 3:10 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sat Mar 22, 4:53 am)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Sat Mar 22, 7:22 am)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Sat Mar 22, 12:08 pm)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sat Mar 22, 12:35 pm)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Sat Mar 22, 11:38 pm)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sun Mar 23, 12:08 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sun Mar 23, 12:15 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Sun Mar 23, 12:20 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Tue Mar 25, 8:50 am)
Re: Scalability requirements for sysv ipc, Nadia Derbey, (Tue Mar 25, 9:00 am)
Re: Scalability requirements for sysv ipc, Peter Zijlstra, (Tue Mar 25, 9:13 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Tue Mar 25, 11:31 am)
Re: Scalability requirements for sysv ipc, Mike Galbraith, (Tue Mar 25, 11:18 pm)
Re: Scalability requirements for sysv ipc, Bill Davidsen, (Thu Mar 27, 3:29 pm)
Re: Scalability requirements for sysv ipc, Manfred Spraul, (Fri Mar 28, 2:49 am)