On Thu, 2012-02-09 at 21:53 +0530, Shashidhar Patil wrote: > Hi Alex, > I tested your code changes for two problems > 1. MSIX vectors allocation for FreeBSD Guest > Tested the allocation of MSI-X allocation happening for both > FreeBSD-9.0 (also tested 8.2) and Linux guest. > Also tried multiple restart of the guests to see if the hosts > still maintains those allocations. With Linux > as guest I could pass traffic. Though interrupt allocation worked > the FreeBSD could to pass traffic. The FreeBSD > driver seems to be broken(atleast when running in guest).
Which device/driver? I was able to use an 82576, both physical device and sr-iov virtual function) with the freebsd 9.0 igb driver. > 2. Guest MSI-X smp_affinity fix. > The smp_affinity configured in guest is honoured. The traffic > distribution is uniform. When smp affinity is configured > in host and guest properly this fix provides multi queue and > hence multi core traffic distribution in both host and > guest. The result is good packet throughput. > > Thanks for the the much needed fixes. Thanks for testing! Alex > -Shashidhar > > On Mon, Feb 6, 2012 at 10:59 PM, Alex Williamson > <alex.william...@redhat.com> wrote: > > On Mon, 2012-02-06 at 21:25 +0530, Shashidhar Patil wrote: > >> HI Alex, > >> I can give it a try. Please send me all patches as one file if > >> possible. > >> I was about to report yet another problem with Guest MSI-X smp affinity > >> not being honoured by KVM while injecting interrupts. Its again in the > >> context > >> of 82599 device (tried with Linux as guest). I had a hunch that the MSI-X > >> vector > >> data which gets modified when SMP affinity is not tracked by the qemu_kvm. > >> So the interrupt injection was done in load balancing fashion. Because of > >> this > >> interrupt LB in guest VCPUs I saw that packets for all the queues were > >> processed > >> by one VCPU instead 2 or 4 available. > >> Anyway I will test the the MSI-X affinity fix also and get back with > >> results. > >> And I hope 82599 send/receive works. Thanks for your help. > > > > I pushed the v2 version to github, so you can grab it from here for > > testing: > > > > git://github.com/awilliam/qemu-kvm.git > > > > Branch pci-assign-msix. Thanks, > > > > Alex > > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
