Re: [dpdk-dev] [PATCH] vhost: Expose virtio interrupt requirement on rte_vhos API

2017-09-24 Thread Yang, Zhiyong
> -Original Message- > From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Stephen Hemminger > Sent: Sunday, September 24, 2017 10:02 PM > To: Jan Scheurich > Cc: dev@dpdk.org; d...@openvswitch.org > Subject: Re: [dpdk-dev] [PATCH] vhost: Expose virtio interr

Re: [dpdk-dev] [PATCH] vhost: Expose virtio interrupt requirement on rte_vhos API

2017-09-24 Thread Stephen Hemminger
I heard Fd.io has a faster vhost driver. Has anyone investigated? On Sep 23, 2017 8:16 PM, "Jan Scheurich" wrote: > Performance tests with the OVS DPDK datapath have shown that the tx > throughput over a vhostuser port into a VM with an interrupt-based virtio > driver is limited by the overhead

[dpdk-dev] [PATCH] vhost: Expose virtio interrupt requirement on rte_vhos API

2017-09-23 Thread Jan Scheurich
Performance tests with the OVS DPDK datapath have shown that the tx throughput over a vhostuser port into a VM with an interrupt-based virtio driver is limited by the overhead incurred by virtio interrupts. The OVS PMD spends up to 30% of its cycles in system calls kicking the eventfd. Also the