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    SubjectRe: [PATCH] sched: smart wake-affine
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    On Tue, 2013-07-09 at 10:30 +0800, Michael Wang wrote:
    > Hi, Davidlohr
    >
    > Thanks for the testing :)
    >
    > On 07/09/2013 02:59 AM, Davidlohr Bueso wrote:
    > [snip]
    > >>
    > >> OK, I'll apply the patches, we'll see what happens. If there significant
    > >> fallout we'll immediately have more information anyway ;-)
    > >
    > > So I gave the v2 a spin on my aim7 benchmark on an 80-core 8 socket
    > > DL980. Not much changed, most numbers are in the noise range, however,
    > > with HT off, the high_systime workload suffered in throughput with this
    > > patch with higher concurrency (after 600 users). Image attached.
    >
    > To make sure I'm not on the wrong way... HT here means hyperthreading,
    > correct?

    Yep :)

    >
    > I have some questions like:
    > 1. how do you disable the hyperthreading? by manual or some other way?

    Manually, from the BIOS.

    > 2. is the 3.10-rc5 in image also disabled the hyperthreading?

    Yes, I happened to have data already collected for 3.10-rc5. While the
    runs with this patch was with -rc7, unless there was some performance
    related commit I missed, I don't think the performance difference was
    because of that.

    > 3. is the v3 patch set show the same issue?

    Uhmmm shoot, I didn't realize there was a v3, sorry about that.

    /me takes another look at the thread.

    Thanks,
    Davidlohr



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