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Re: [Xen-devel] credit scheduler and HYPERVISOR_yield()
| To: | John Levon <levon@xxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] credit scheduler and HYPERVISOR_yield() |
| From: | Emmanuel Ackaouy <ackaouy@xxxxxxxxx> |
| Date: | Tue, 9 Oct 2007 09:06:14 +0200 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Tue, 09 Oct 2007 00:06:50 -0700 |
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Hi John. The expected behavior of yield() (or any schedule operation really) is that the current VCPU will be placed on the runq behind all VCPUs of equal or greater priority. Looking at __runq_insert() in sched_credit.c, it looks correct to me in that respect. Can you clarify what's going wrong? On Oct 9, 2007, at 1:41, John Levon wrote: It looks like a HYPERVISOR_yield() call will end placing the yielded VCPU at the head of run queue if there are only equal-or-lower priority VCPUs on the queue. Shouldn't it place it after any equal-priority CPUs on the list? thanks john _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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