xoff was increasing so I disabled flow control. That's a HP DL360 Gen9 and lspci -vvv tells me cards are connected to x8 link, speed is 5GT/s and ASPM is disabled.
Other error counters are still zero. When I compared rx_packets and rx_missed_errors it looks like a 38% (!!) packets are getting lost. Unfortunately HP documentation is a scam and they actively avoid publishing motherboard layout. Any other place I could look for hints? On Fri, Sep 23, 2016 at 7:01 PM, Alexander Duyck <alexander.du...@gmail.com> wrote: > 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
