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Re: [Xen-devel] [PATCH] only set scheduler timer for non-idle CPU
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Thomas Pfeuffer <thomas.pfeuffer@xxxxxxxx>, "Yu, Ke" <ke.yu@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] only set scheduler timer for non-idle CPU |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Thu, 02 Apr 2009 14:18:41 +0100 |
| Cc: | |
| Delivery-date: | Thu, 02 Apr 2009 06:19:08 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH] only set scheduler timer for non-idle CPU |
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On 02/04/2009 14:06, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote: >> I think your patch is not good in case sedf-scheduler is used. If idle VCPU >> is the current "running" VCPU, the scheduler timer is set to the next "period >> begin" of the first VCPU in the wait queue. >> Your patch prevents sedf from taking the VCPUs waiting for their next period >> into the runnable queue again. > > It¹s probably cleaner always to respect the specific scheduler¹s scheduling > quantum in schedule.c, but then have sched_credit.c return a very large > quantum (large as possible) for the idle VCPU. I checked in something to this effect as c/s 19500. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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