On Fri, Sep 23, 2016 at 1:10 AM, Michał Purzyński <michalpurzyns...@gmail.com> wrote: > Hello. > > On my IDS workload with af_packet I can see rx_missed_errors growing while > rx_no_buffer_count does not. Basically every other kind of rx_ error > counter is 0, including rx_no_dma_resources. It's an 82599 based card. > > I don't know what to think about that. I went through ixgbe source code and > the 82599 datasheet and seems like rx_missed_error means a new packet > overwrote something already in the packet buffer (FIFO queue on the card) > because there was no more space in it. > > Now, that would happen if there is no place to DMA packets into - but that > counter does not grow. > > Could you point me to where should I be looking for a problem? > > -- > Michal Purzynski
The Rx missed count will increment if you are not able to receive a packet because the Rx FIFO is full. If you are not seeing any rx_no_dma_resources problems it might indicate that the problem is not with providing the DMA resources, but a problem on the bus itself. You might want to double check the slot the device is connected to in order to guarantee that there is a x8 link that supports 5GT/s all the way through to the root complex. - Alex ------------------------------------------------------------------------------ _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
