[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Patch: implementing least priority interrupt routing
On 18/11/08 09:59, "Juergen Gross" <juergen.gross@xxxxxxxxxxxxxxxxxxx> wrote: > the attached patch implements interrupt routing to least priority processor > for HVM domains. > Instead of round robin the vcpu with the lowest processor priority is selected > for the interrupt. If multiple vcpus share the same low priority interrupts > are distributed between those round robin. > Tested with BS2000 domain (3 vcpus, idle processors are now preferred > interrupt target). Where idle means 'not processing an interrupt'. Which ought to be by far the most common case even for a non-idle CPU. Does this really improve load balancing all that much? Does BS2000 spend lots of time in IRQ context? My fear is that extra complexity here slows down dest_lowprio for all OSes (and it's used by a lot of OSes) for every ExtInt delivered. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
|
![]() |
Lists.xenproject.org is hosted with RackSpace, monitoring our |