On Tue, Aug 12, 2014 at 6:47 PM, Nikolay Nikolaev <n.nikolaev@xxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > > On Tue, Aug 12, 2014 at 5:41 AM, Li Liu <john.liuli@xxxxxxxxxx> wrote: > > > > Hi all, > > > > Is anyone there can tell the current status of vhost-net on kvm-arm? > > > > Half a year has passed from Isa Ansharullah asked this question: > > http://www.spinics.net/lists/kvm-arm/msg08152.html > > > > I have found two patches which have provided the kvm-arm support of > > eventfd and irqfd: > > > > 1) [RFC PATCH 0/4] ARM: KVM: Enable the ioeventfd capability of KVM on ARM > > http://lists.gnu.org/archive/html/qemu-devel/2014-01/msg01770.html > > > > 2) [RFC,v3] ARM: KVM: add irqfd and irq routing support > > https://patches.linaro.org/32261/ > > > > And there's a rough patch for qemu to support eventfd from Ying-Shiuan Pan: > > > > [Qemu-devel] [PATCH 0/4] ioeventfd support for virtio-mmio > > https://lists.gnu.org/archive/html/qemu-devel/2014-02/msg00715.html > > > > But there no any comments of this patch. And I can found nothing about qemu > > to support irqfd. Do I lost the track? > > > > If nobody try to fix it. We have a plan to complete it about virtio-mmio > > supporing irqfd and multiqueue. > > > > > > we at Virtual Open Systems did some work and tested vhost-net on ARM > back in March. > The setup was based on: > - host kernel with our ioeventfd patches: > http://www.spinics.net/lists/kvm-arm/msg08413.html > > - qemu with the aforementioned patches from Ying-Shiuan Pan > https://lists.gnu.org/archive/html/qemu-devel/2014-02/msg00715.html > > The testbed was ARM Chromebook with Exynos 5250, using a 1Gbps USB3 > Ethernet adapter connected to a 1Gbps switch. I can't find the actual > numbers but I remember that with multiple streams the gain was clearly > seen. Note that it used the minimum required ioventfd implementation > and not irqfd. > > I guess it is feasible to think that it all can be put together and > rebased + the recent irqfd work. One can achiev even better > performance (because of the irqfd). > Managed to replicate the setup with the old versions e used in March: Single stream from another machine to chromebook with 1Gbps USB3 Ethernet adapter. iperf -c <address> -P 1 -i 1 -p 5001 -f k -t 10 to HOST: 858316 Kbits/sec to GUEST: 761563 Kbits/sec 10 parallel streams iperf -c <address> -P 10 -i 1 -p 5001 -f k -t 10 to HOST: 842420 Kbits/sec to GUEST: 625144 Kbits/sec > > > > > > > > > > > > > _______________________________________________ > > kvmarm mailing list > > kvmarm@xxxxxxxxxxxxxxxxxxxxx > > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm > > > regards, > Nikolay Nikolaev > Virtual Open Systems -- 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
