Re: virtio_net / netmap RX dropping frames

2017-10-27 Thread Joe Buehler
Vincenzo Maffione wrote: > You need to figure out who is dropping the RX packets and why. This > seems to happen before the packets really make their way to the > virtio-net RX ring. So it must be some queue overflow in the macvtap or > your ixgbe device. I cranked up the qlen on macvtap1 (100,00

Re: [netmap] when does a packet in the netmap ring send out exactly

2017-10-27 Thread Vincenzo Maffione
Hi, This is actually a limitation of the netmap API: ring->tail is exposed to the user so that it knows it can use the slots in the range "[ring->head..ring->tail[" for new transmissions (note that head is included, tail excluded, to prevent wraparound). However, there is no explicit indication o