Hi, Li, It's ok, I did get those mails from mailing list. I guess it was because I did not subscribe some of mailing lists.
Currently, I think I will not have any plan to renew my patcheset since I have resigned from my previous company, I do not have Cortex-A15 platform to test/verify. I'm fine with that, it would be great if you or someone can take it and improve it. Thanks. ---- Best Regards, Yingshiuan Pan 2014-08-15 11:04 GMT+08:00 Li Liu <john.li...@huawei.com>: > Hi Ying-Shiuan Pan, > > I don't know why for missing your mail in mailbox. Sorry about that. > The results of vhost-net performance have been attached in another mail. > > Do you have a plan to renew your patchset to support irqfd. If not, > we will try to finish it based on yours. > > On 2014/8/14 11:50, Li Liu wrote: > > > > > > On 2014/8/13 19:25, Nikolay Nikolaev wrote: > >> On Wed, Aug 13, 2014 at 12:10 PM, Nikolay Nikolaev > >> <n.nikol...@virtualopensystems.com> wrote: > >>> On Tue, Aug 12, 2014 at 6:47 PM, Nikolay Nikolaev > >>> <n.nikol...@virtualopensystems.com> 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. > >>>> > >>>> 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 > >> to GUEST vhost=off: 508150 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 > >> to GUEST vhost=off: 425276 Kbits/sec > > > > I have tested the same cases on a Hisilicon board (Cortex-A15@1G) > > with Integrated 1Gbps Ethernet adapter. > > > > iperf -c <address> -P 1 -i 1 -p 5001 -f M -t 10 > > to HOST: 906 Mbits/sec > > to GUEST: 562 Mbits/sec > > to GUEST vhost=off: 340 Mbits/sec > > > > 10 parallel streams, the performance gets <10% plus: > > iperf -c <address> -P 10 -i 1 -p 5001 -f M -t 10 > > to HOST: 923 Mbits/sec > > to GUEST: 592 Mbits/sec > > to GUEST vhost=off: 364 Mbits/sec > > > > I't easy to see vhost-net brings great performance improvements, > > almost 50%+. > > > > Li. > > > >>> > >>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> _______________________________________________ > >>>>> kvmarm mailing list > >>>>> kvm...@lists.cs.columbia.edu > >>>>> https://lists.cs.columbia.edu/mailman/listinfo/kvmarm > >>>> > >>>> > >>>> regards, > >>>> Nikolay Nikolaev > >>>> Virtual Open Systems > >> > >> . > >> > > > > > > > > . > > > >
