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[Xen-devel] Re: timer interrupts, virqs, irq balance questions
| To: | Ryan Harper <ryanh@xxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: timer interrupts, virqs, irq balance questions |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Tue, 20 Sep 2005 17:23:47 +0100 |
| Cc: | Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Tue, 20 Sep 2005 16:16:39 +0000 |
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On 20 Sep 2005, at 16:06, Ryan Harper wrote: I've been looking into bug [1]#195 and I have a couple of questions on how timer interrupts and virqs are handled. Is it possible for dom0 linux to irq balance timer interrupts to different cpus? That is, ifxen sends a VIRQ_TIMER to vcpu0, backed by cpu0, is it possible for thatinterrupt to be handled by vcpu1, backed by cpu1 ? No, event channels bound to VIRQs cannot have their cpu affinity changed. So vcpu0 VIRQ_TIMER will always call back to vcpu0, and so on. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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