Re: [Xen-devel] [Q] about Credit Scheduler Dom0 Scheduling policy.

[Emmanuel Ackaouy <ack@xxxxxxxxxxxxx>]

Thanks for sending me the full logs!

I took a look and I do indeed see some cycles during which
dom0 and the I/O generating domU don't preempt the spinners.
I believe this is because those domains don't always consume
enough CPU to appear in the accounting paths.

I have coded up a fix which should make things better for
I/O intensive domains that use few CPU resources. I am
including the patch here. It applies to tip of untable.

Can you try out this patch and let me know how it works?

Thanks,
Emmanuel.

Attachment: sched-wake-boost.patch
Description: Text document

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