On 04/28/2016 12:06 PM, Luigi Rizzo wrote: > > > On Thursday, April 28, 2016, bazzoola <bazzo...@gmail.com > <mailto:bazzo...@gmail.com>> wrote: > > > > On 04/28/2016 11:35 AM, Navdeep Parhar wrote: > > On 04/28/2016 11:13, bazzoola wrote: > >> Hi! > >> > >> Two questions: > >> > >> (1) Is there a way to know when netmap rx rings overrun? Most NIC > >> drivers provide MPC (missed packet count) and sysctl for rx_overrun. > >> > >> I would like to know if my application is not reading as fast, > i.e., no > >> frames are being dropped. > > > > A NIC's hardware counters don't distinguish between netmap or normal > > operation so you can monitor the existing sysctls for rx > drops/overruns. > > > > Regards, > > Navdeep > > > > Navdeep, > > I am not asking about NIC's ring overrun. As you know netmap has its own > rings. Is there a way to know if netmap's rx ring overrun? > > > Overruns by definition can only be counted by the NIC > > Cheers > Luigi > >
Luigi, I will rephrase the question to avoid the 'overrun' definition. (1) if my application is not reading fast enough is there a way to know if netmap's rx ring starts overwriting unread slots? Also, my section question was: (2) What is the benefit of NETMAP_DO_RX_POLL? I do see the slots being updated when I set this flag but 'tail' is not advancing unless I read. Basically, all I am trying to do is detect if frames are dropped in my application using netmap API. Thanks! B. _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
