udpgro_fwd.sh in ubuntu_kernel_selftests failed ./udpgso_bench_rx: wrong packet number! with J-5.15 / K-5.19 lowlatency 64k ARM64

[Po-Hsu Lin]

Issue found on node starmie-kernel with K-5.19 lowlataency 64k (5.19.0-1020.21)

Test failed with:
./udpgso_bench_rx: wrong packet number! got 7, expected 10

Test log:
Running 'make run_tests -C net TEST_PROGS=udpgro_fwd.sh TEST_GEN_PROGS='' TEST_CUSTOM_PROGS='''
 make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/net'
 make --no-builtin-rules ARCH=arm64 -C ../../../.. headers_install
 make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux'
   INSTALL ./usr/include
 make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux'
 TAP version 13
 1..1
 # selftests: net: udpgro_fwd.sh
 # IPv4
 # No GRO ./udpgso_bench_rx: wrong packet number! got 7, expected 10
 #
 # fail client exit code 0, server 1
 # GRO frag list ./udpgso_bench_rx: wrong packet number! got 7, expected 10
 #
 # fail client exit code 0, server 1
 # GRO fwd ok
 # UDP fwd perf udp rx: 7 MB/s 5684 calls/s
 # udp tx: 126 MB/s 2151 calls/s 2151 msg/s
 # ./udpgso_bench_tx: sendmsg: Connection refused
 # fail client exit code 1, server 0
 # UDP GRO fwd perf udp rx: 90 MB/s 72704 calls/s
 # udp tx: 139 MB/s 2364 calls/s 2364 msg/s
 # udp rx: 100 MB/s 81408 calls/s
 # udp tx: 139 MB/s 2362 calls/s 2362 msg/s
 # udp rx: 100 MB/s 81152 calls/s
 # udp tx: 138 MB/s 2356 calls/s 2356 msg/s
 # GRO frag list over UDP tunnel ./udpgso_bench_rx: wrong packet number! got 7, expected 10
 #
 # fail client exit code 0, server 1
 # GRO fwd over UDP tunnel ok
 # UDP tunnel fwd perf udp rx: 5 MB/s 4739 calls/s
 # udp tx: 88 MB/s 1495 calls/s 1495 msg/s
 # udp rx: 6 MB/s 5565 calls/s
 # udp tx: 87 MB/s 1488 calls/s 1488 msg/s
 # udp rx: 6 MB/s 5544 calls/s
 # udp tx: 87 MB/s 1486 calls/s 1486 msg/s
 # UDP tunnel GRO fwd perf udp rx: 15 MB/s 12797 calls/s
 # udp tx: 122 MB/s 2081 calls/s 2081 msg/s
 # udp rx: 18 MB/s 14525 calls/s
 # udp tx: 122 MB/s 2077 calls/s 2077 msg/s
 # udp rx: 14 MB/s 11463 calls/s
 # udp tx: 143 MB/s 2430 calls/s 2430 msg/s
 # IPv6
 # No GRO ./udpgso_bench_rx: wrong packet number! got 7, expected 10
 #
 # fail client exit code 0, server 1
 # GRO frag list ./udpgso_bench_rx: wrong packet number! got 7, expected 10
 #
 # fail client exit code 0, server 1
 # GRO fwd ok
 # UDP fwd perf udp rx: 6 MB/s 5355 calls/s
 # udp tx: 125 MB/s 2134 calls/s 2134 msg/s
 # udp rx: 7 MB/s 6216 calls/s
 # udp tx: 125 MB/s 2121 calls/s 2121 msg/s
 # udp rx: 7 MB/s 5950 calls/s
 # udp tx: 126 MB/s 2139 calls/s 2139 msg/s
 # UDP GRO fwd perf udp rx: 82 MB/s 66454 calls/s
 # udp tx: 144 MB/s 2444 calls/s 2444 msg/s
 # udp rx: 100 MB/s 80896 calls/s
 # udp tx: 145 MB/s 2466 calls/s 2466 msg/s
 # udp rx: 99 MB/s 80384 calls/s
 # udp tx: 145 MB/s 2466 calls/s 2466 msg/s
 # GRO frag list over UDP tunnel ./udpgso_bench_rx: wrong packet number! got 7, expected 10
 #
 # fail client exit code 0, server 1
 # GRO fwd over UDP tunnel ok
 # UDP tunnel fwd perf udp rx: 5 MB/s 4501 calls/s
 # udp tx: 91 MB/s 1555 calls/s 1555 msg/s
 # udp rx: 6 MB/s 5460 calls/s
 # udp tx: 90 MB/s 1537 calls/s 1537 msg/s
 # udp rx: 7 MB/s 6237 calls/s
 # udp tx: 96 MB/s 1639 calls/s 1639 msg/s
 # UDP tunnel GRO fwd perf udp rx: 16 MB/s 13112 calls/s
 # udp tx: 124 MB/s 2120 calls/s 2120 msg/s
 # udp rx: 18 MB/s 14722 calls/s
 # udp tx: 125 MB/s 2121 calls/s 2121 msg/s
 # udp rx: 18 MB/s 14789 calls/s
 # udp tx: 125 MB/s 2122 calls/s 2122 msg/s
 not ok 1 selftests: net: udpgro_fwd.sh # exit=1
 make: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/net'

[Po-Hsu Lin (cypressyew)]

This can be found on J-lowlatency-64k-5.15.0-68.75 ARM64 node starmie-kernel