Messages in this thread | | | Date | Mon, 7 Aug 2023 15:22:12 -1000 | From | Tejun Heo <> | Subject | Re: [PATCHSET v1 wq/for-6.5] workqueue: Improve unbound workqueue execution locality |
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Hello,
On Thu, May 18, 2023 at 02:16:45PM -1000, Tejun Heo wrote: > Unbound workqueues used to spray work items inside each NUMA node, which > isn't great on CPUs w/ multiple L3 caches. This patchset implements > mechanisms to improve and configure execution locality.
The patchset shows minor perf improvements for some but more importantly gives users more control over worker placement which helps working around some of the recently reported performance regressions. Prateek reported concerning regressions with tbench but I couldn't reproduce it and can't see how tbench would be affected at all given the benchmark doesn't involve workqueue operations in any noticeable way.
Assuming that the tbench difference was a testing artifact, I'm applying the patchset to wq/for-6.6 so that it can receive wider testing. Prateek, I'd really appreciate if you could repeat the test and see whether the difference persists.
Thanks.
-- tejun
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