2015-05-20 11:11, Jeff Weeks: > Hello all, > > I've been developing with dpdk, using virtio, and I'm noticing that I can > often get into a state whereby I no longer receive any packets. > > The call to rte_eth_rx_burst always returns 0, indicating the rx queue is > empty. > > How is this queue filled? I see there is a dpdk thread, which waits on an > epoll fd for interrupts. I set a breakpoint here, and it appeared as though > we were waiting forever on the epoll fd. This, to me, seemed to be the > source > of the issue I'm seeing (presumably interrupts cause us to read off the nic > and > fill the queue?)... but, oddly enough, I see the same behaviour even when I'm > receiving packets. > > Have I misinterpreted how this is supposed to work? Or is gdb behaving > poorly > for me (wouldn't be surprising...). > > What/how else can I further investigate this?
Are you using the latest version (git HEAD)? Are you using DPDK vhost?
