When change the device emulation in the NIC to virtio, I could get 900mbps when sending 1g of input. Good so far.
But when I increased the traffic rate to 10g, output became very turbulent - ranging from 0 to 150mbps. I tried rate limiting on the vfs using the following commands, but didnt help. ip link set eth0 vf 0 rate 1000 ip link set eth1 vf 0 rate 1000 Are there any recommended settings for using DPDK over virtual function in a VM? Thanks, Surya On Mar 6, 2014, at 7:08 PM, Surya Nimmagadda <nscsekhar at juniper.net> wrote: > Hi, > > I am seeing very low throughput when I run l2fwd in a VM. > > When I send 1g data, I could see only about 10mbps of traffic being received > by the VM. > > I dont see this problem when running l2fwd on the host. I could get 10gbps > traffic in and out of both the ports. > > My setup details are > > - Traffic coming in on a 10G interface(eth0) and going out on another 10G > interface(eth1) > - Both 10G NICs are 82599 > - Created virtual functions eth5 and eth8 on eth0 and eth1 respectively > - eth5 and eth8 are mapped to eth0 and eth1 in a VM, with device type as > e1000 in Passthru mode. > - Host OS : Centos 6.2, Guest OS : Ubuntu 12.04 > > <?> > Network devices using IGB_UIO driver > ==================================== > 0000:00:07.0 '82540EM Gigabit Ethernet Controller' drv=igb_uio unused=e1000 > 0000:00:08.0 '82540EM Gigabit Ethernet Controller' drv=igb_uio unused=e1000 > <?> > > The counters on the virtual interface (eth5/eth8) show all 10g traffic > received, but I see very 10mbps worth traffic at the l2fwd app counters on > the VM. > > I also see the following logs in the VM dmesg output. > > [75399.491215] irq 0xb not handled > [75400.142025] irq 0xb not handled > [75400.142150] irq 0xb not handled > [75400.142913] irq 0xb not handled > [75400.142920] irq 0xb not handled > > Has anyone seen this issue? Am I missing anything? > > Thanks, > Surya > >
