HI Alex, I tried both FreeBSD stock and Intel official freebsd driver for 82599. I tried both FreeBSD 9.0 and FreeBSD8.2. No luck with traffic. -Shashidhar On Thu, Feb 9, 2012 at 10:53 PM, Alex Williamson <alex.williamson@xxxxxxxxxx> wrote: > 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.williamson@xxxxxxxxxx> 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 majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
