Hi Shannon, >Type of backend bandwith(GBytes/sec) >virtio-net 0.66 >vhost-net 1.49 >vhost-net with irqfd 2.01 > >Test cmd: ./iperf -c 192.168.0.2 -P 1 -i 10 -p 5001 -f G -t 60 Impressive results ! Could you please detail your setup ? which platform are you using and which GbE controller ? As a reference, it would be good also to have result with an iperf to the HOST to see how far we are from a native configuration... Also, I assume a pending Qemu patch is necessary to assign multiple irqs ? I'm correct ? Thanks a lot, Best regards Rémy -----Message d'origine----- De : Shannon Zhao [mailto:zhaoshenglong@xxxxxxxxxx] Envoyé : mercredi 5 novembre 2014 09:00 À : linux-kernel@xxxxxxxxxxxxxxx Cc : mst@xxxxxxxxxx; peter.maydell@xxxxxxxxxx; john.liuli@xxxxxxxxxx; joel.schopp@xxxxxxx; GAUGUEY Rémy 228890; qemu-devel@xxxxxxxxxx; n.nikolaev@xxxxxxxxxxxxxxxxxxxxxx; virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx; peter.huangpeng@xxxxxxxxxx; hangaohuai@xxxxxxxxxx Objet : Re: [RFC PATCH] virtio-mmio: support for multiple irqs On 2014/11/4 17:35, Shannon Zhao wrote: > As the current virtio-mmio only support single irq, so some advanced > features such as vhost-net with irqfd are not supported. And the net > performance is not the best without vhost-net and irqfd supporting. > Hi Joel, Peter, Mst, Some virtio-net with virtio-mmio performance data on ARM added as followed: Type of backend bandwith(GBytes/sec) virtio-net 0.66 vhost-net 1.49 vhost-net with irqfd 2.01 Test cmd: ./iperf -c 192.168.0.2 -P 1 -i 10 -p 5001 -f G -t 60 >From this test data, irqfd has great improvement (about 30%) on performance. So maybe it's necessary to enable multiple irq support to make vhost-net with virtio-mmio on ARM be able to use irqfd. How do you guys think? Look forward for your feedback. Thanks, Shannon > This patch support virtio-mmio to request multiple irqs like > virtio-pci. With this patch and qemu assigning multiple irqs for > virtio-mmio device, it's ok to use vhost-net with irqfd on arm/arm64. > _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
