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). > > > > > > _______________________________________________ > 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
