Alexander Duyck posted a series in 2018 proposing adding UDP segmentation offload support to ixgbe and ixgbevf, but those patches were never accepted:
https://lore.kernel.org/netdev/20180504003556.4769.11407.stgit@localhost.localdomain/ This series is a repost of his ixgbe patch along with a similar change to the igb and i40e drivers. Testing using the udpgso_bench_tx benchmark shows a noticeable performance improvement with these changes applied. I've shared the benchmark script I've used to generate the #s in this mail: https://lore.kernel.org/netdev/0e0e706c-4ce9-c27a-af55-339b4eb6d...@akamai.com/T/#mfe4c35c57a3860cda5306b63f61068f837242ee5 v2 changes: * Added Alex's suggested-by tag to ixgbe patch * Checking for gso_type, suggested by Sridhar * Fixed bug in ixgbe patch where I accidentally left the old type_tucmd set to TCP * Updated perf #s below * includes changes above * fixed bad config on my igb machine * added chip used for testing next to driver name All #s below were run with: udpgso_bench_tx -C 1 -4 -D 172.25.43.133 -z -l 30 -S 0 -u -s $pkt_size igb (i210):: SW GSO (ethtool -K eth0 tx-udp-segmentation off): $pkt_size kB/s(sar) MB/s Calls/s Msg/s CPU MB2CPU ======================================================================== 1472 120167.13 114 81278 81278 16.24 7.01 2944 120166.83 114 40641 40641 12.82 8.89 5888 120166.42 114 20320 20320 10.14 11.24 11776 120166.43 114 10160 10160 8.55 13.33 23552 120167.24 114 5080 5080 7.76 14.69 47104 120166.83 114 2540 2540 7.07 16.12 61824 120167.08 114 1935 1935 7.07 16.12 HW GSO offload (ethtool -K eth0 tx-udp-segmentation on): $pkt_size kB/s(sar) MB/s Calls/s Msg/s CPU MB2CPU ======================================================================== 1472 120167.05 114 81276 81276 16.13 7.06 2944 120166.94 114 40640 40640 8.66 13.16 5888 120166.84 114 20320 20320 5.34 21.34 11776 120166.84 114 10160 10160 3.34 34.13 23552 120167.25 114 5080 5080 2.55 44.70 47104 120149.30 113 2539 2539 2.14 52.80 61824 120165.41 114 1935 1935 2.04 55.88 ixgbe (82599ES):: SW GSO: $pkt_size kB/s(sar) MB/s Calls/s Msg/s CPU MB2CPU ======================================================================== 1472 1043972.83 990 706122 706122 100 9.90 2944 1201623.17 1140 406367 406367 95.97 11.87 5888 1201629.46 1140 203184 203184 56 20.35 11776 1201631.38 1140 101590 101590 42.72 26.68 23552 1201633.94 1140 50796 50796 36.31 31.39 47104 1201631.05 1140 25397 25397 33.91 33.61 61824 1201629.96 1140 19350 19350 33.38 34.15 HW GSO Offload: $pkt_size kB/s(sar) MB/s Calls/s Msg/s CPU MB2CPU ======================================================================== 1472 1053393.41 999 712679 712679 100 9.99 2944 1201631.19 1140 406357 406357 57.92 19.68 5888 1201622.51 1140 203178 203178 30.66 37.18 11776 1201626.60 1140 101590 101590 16.89 67.49 23552 1201617.19 1140 50795 50795 10.11 112.75 47104 1200218.72 1138 25368 25368 6.86 165.88 61824 1201619.66 1140 19350 19350 5.38 211.89 i40e (x710):: SW GSO: $pkt_size kB/s(sar) MB/s Calls/s Msg/s CPU MB2CPU ======================================================================== 1472 642718.15 609 434585 434585 100 6.09 2944 957988.80 909 324029 324029 100 9.09 5888 1199207.69 1138 202845 202845 81.51 13.96 11776 1200767.60 1139 101517 101517 63.93 17.81 23552 1201197.22 1140 50794 50794 59.14 19.27 47104 1201410.91 1139 25393 25393 57.15 19.93 61824 1201609.48 1140 19350 19350 55.12 20.68 HW GSO offload: $pkt_size kB/s(sar) MB/s Calls/s Msg/s CPU MB2CPU ======================================================================== 1472 666626.15 632 450920 450920 100 6.32 2944 1200831.63 1139 406093 406093 89.68 12.70 5888 1201603.35 1140 203178 203178 56.38 20.21 11776 1201597.29 1140 101588 101588 36.9 30.89 23552 1201596.98 1140 50794 50794 24.23 47.04 47104 1201491.67 1139 25394 25394 17.14 66.45 61824 1201598.88 1140 19350 19350 15.11 75.44 Josh Hunt (3): igb: Add UDP segmentation offload support ixgbe: Add UDP segmentation offload support i40e: Add UDP segmentation offload support drivers/net/ethernet/intel/i40e/i40e_main.c | 1 + drivers/net/ethernet/intel/i40e/i40e_txrx.c | 12 +++++++++--- drivers/net/ethernet/intel/igb/e1000_82575.h | 1 + drivers/net/ethernet/intel/igb/igb_main.c | 23 +++++++++++++++++------ drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 24 ++++++++++++++++++------ 5 files changed, 46 insertions(+), 15 deletions(-) -- 2.7.4
