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
