Messages in this thread | | | Date | Tue, 05 Mar 2013 12:10:01 -0500 | From | Rik van Riel <> | Subject | Re: [PATCH v2 0/4] ipc: reduce ipc lock contention |
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On 03/05/2013 04:35 AM, Davidlohr Bueso wrote:
> 2) While on an Oracle swingbench DSS (data mining) workload the > improvements are not as exciting as with Rik's benchmark, we can see > some positive numbers. For an 8 socket machine the following are the > percentages of %sys time incurred in the ipc lock: > > Baseline (3.9-rc1): > 100 swingbench users: 8,74% > 400 swingbench users: 21,86% > 800 swingbench users: 84,35% > > With this patchset: > 100 swingbench users: 8,11% > 400 swingbench users: 19,93% > 800 swingbench users: 77,69%
Does the swingbench DSS workload use multiple semaphores, or just one?
Your patches look like a great start to make the semaphores more scalable. If the swingbench DSS workload uses multiple semaphores, I have ideas for follow-up patches to make things scale better.
What does ipcs output look like while running swingbench DSS?
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