Statistics at hardware level: ethtool -S eth3 | grep "rx_missed_errors"
Indicates the number of frames that were dropped due to the adapter's fifo getting full and over flowing. It seems there are interrupt delivery problems or interrupts are getting lost.
Statistics at hardware level: ethtool -S eth3 | grep "rx_no_buffer_count"
Indicates that the driver didn't return buffers to the hardware soon enough, but the hardware was able to store the packet (at the time of reception) in the fifo to try again. It seems there are interrupt delivery problems or interrupts are getting lost.
Slot settings for the NIC: lspci -v -v -s 07:00.1
Processor related statistics: mpstat -P ALL 5
Event Builder ERROR: netmem.c, 645: NetTrans_create: failed to create UDP:0.0.0.0:50534: Address already in use.
Reason: port 50534 is already used by other application (most likely by EPICS IOC)
Solution: Close all EBs, close all IOCs, start EBs, start IOCs, close EBs, start EBs. By doing this sequence we start IOCs after EBs because IOCs are able to dynamically pick up unused UDP ports. Then we restart again EBs because for a proper start they need running IOCs.