Messages in this thread |  | | Date | Mon, 5 Nov 2018 17:29:55 -0800 | From | Daniel Jordan <> | Subject | Re: [RFC PATCH v4 00/13] ktask: multithread CPU-intensive kernel work |
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On Mon, Nov 05, 2018 at 06:29:31PM +0100, Michal Hocko wrote: > On Mon 05-11-18 11:55:45, Daniel Jordan wrote: > > Michal, you mentioned that ktask should be sensitive to CPU utilization[1]. > > ktask threads now run at the lowest priority on the system to avoid disturbing > > busy CPUs (more details in patches 4 and 5). Does this address your concern? > > The plan to address your other comments is explained below. > > I have only glanced through the documentation patch and it looks like it > will be much less disruptive than the previous attempts. Now the obvious > question is how does this behave on a moderately or even busy system > when you compare that to a single threaded execution. Some numbers about > best/worst case execution would be really helpful.
Patches 4 and 5 have some numbers where a ktask and non-ktask workload compete against each other. Those show either 8 ktask threads on 8 CPUs (worst case) or no ktask threads (best case).
By single threaded execution, I guess you mean 1 ktask thread. I'll run the experiments that way too and post the numbers.
> I will look closer later.
Great! Thanks for your comment.
Daniel
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