I'm so glad to see my patches also work in your environment!! That's really exciting. I'm also wondering what will happen if integrating with irqfd.
BTW, would share your performance number? ---- Best Regards, 潘穎軒 Yingshiuan Pan 2014-08-13 10:23 GMT+08:00 Li Liu <john.li...@huawei.com>: > > > On 2014/8/12 23:47, Nikolay Nikolaev wrote: > > Hello, > > > > > > On Tue, Aug 12, 2014 at 5:41 AM, Li Liu <john.li...@huawei.com> 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. > > > > Yeah, we have roughly tested vhost-net without irqfd and get the same > result. And now try to see what will happen with 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 > >> kvm...@lists.cs.columbia.edu > >> https://lists.cs.columbia.edu/mailman/listinfo/kvmarm > > > > > > regards, > > Nikolay Nikolaev > > Virtual Open Systems > > > > . > > > > >
