Messages in this thread |  | | Subject | Re: Scalability requirements for sysv ipc | From | Mike Galbraith <> | Date | Sat, 22 Mar 2008 06:43:28 +0100 |
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On Fri, 2008-03-21 at 17:08 +0100, Manfred Spraul wrote: > Paul E. McKenney wrote: > > I could give it a spin -- though I would need to be pointed to the > > patch and the test. > > > > > I'd just compare a recent kernel with something older, pre Fri Oct 19 > 11:53:44 2007 > > Then download ctxbench, run one instance on each core, bound with taskset. > http://www.tmr.com/%7Epublic/source/ > (I don't juse ctxbench myself, if it doesn't work then I could post my > own app. It would be i386 only with RDTSCs inside)
(test gizmos are always welcome)
Results for Q6600 box don't look particularly wonderful.
taskset -c 3 ./ctx -s
2.6.24.3 3766962 itterations in 9.999845 seconds = 376734/sec
2.6.22.18-cfs-v24.1 4375920 itterations in 10.006199 seconds = 437330/sec
for i in 0 1 2 3; do taskset -c $i ./ctx -s& done
2.6.22.18-cfs-v24.1 4355784 itterations in 10.005670 seconds = 435361/sec 4396033 itterations in 10.005686 seconds = 439384/sec 4390027 itterations in 10.006511 seconds = 438739/sec 4383906 itterations in 10.006834 seconds = 438128/sec
2.6.24.3 1269937 itterations in 9.999757 seconds = 127006/sec 1266723 itterations in 9.999663 seconds = 126685/sec 1267293 itterations in 9.999348 seconds = 126742/sec 1265793 itterations in 9.999766 seconds = 126592/sec
-Mike
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