Hi Sven I can confirm great stability improvement after your patch "lan743x: boost performance on cpu archs w/o dma cache snooping". Please note, that test_ber opens raw sockets as s = socket(AF_PACKET, SOCK_RAW, ETH_P_ALL) and resulting 'average speed' is a average egress speed.
Test machine is Intel Pentium G4560 3.50GHz lan743x with rejected virtual phy 'inside' What I had before: $ ifmtu eth7 500 $ test_ber -l eth7 -c 1000 -n 1000000 -f500 --no-conf ... number of sent packets = 1000000 number of received packets = 289017 number of lost packets = 710983 number of out of order packets = 0 number of bit errors = 0 total errors detected = 710983 bit error rate = 0.710983 average speed: 429.3799 Mbit/s $ ifmtu eth7 1500 $ sudo test_ber -l eth7 -c 1000 -n 1000000 -f1500 --no-conf ... number of sent packets = 1000000 number of received packets = 577194 number of lost packets = 422806 number of out of order packets = 0 number of bit errors = 0 total errors detected = 422806 bit error rate = 0.422806 average speed: 644.6557 Mbit/s --- and what I had after your patch: $ ifmtu eth7 500 $ test_ber -l eth7 -c 1000 -n 1000000 -f500 --no-conf ... number of sent packets = 1000000 number of received packets = 711329 number of lost packets = 288671 number of out of order packets = 0 number of bit errors = 0 total errors detected = 288671 bit error rate = 0.288671 average speed: 429.2263 Mbit/s $ ifmtu eth7 1500 $ test_ber -l eth7 -c 1000 -n 1000000 -f1500 --no-conf ... number of sent packets = 1000000 number of received packets = 1000000 number of lost packets = 0 number of out of order packets = 0 number of bit errors = 0 total errors detected = 0 bit error rate = 0 average speed: 644.5405 Mbit/s
