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[Bug 1950627] Re: ubuntu_kernel_selftests:net:udpgro_fwd.sh: udpgso_bench_tx: sendmsg: Connection refused

To: canonical-ubuntu-qa@xxxxxxxxxxxxxxxxxxx
From: Po-Hsu Lin <1950627@xxxxxxxxxxxxxxxxxx>
Date: Thu, 08 Jun 2023 01:49:08 -0000
Reply-to: Bug 1950627 <1950627@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
** Merge proposal unlinked:
   https://code.launchpad.net/~canonical-kernel-team/+git/rt-hints/+merge/443928

** Merge proposal unlinked:
   https://code.launchpad.net/~diewald/+git/rt-hints/+merge/444282

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https://bugs.launchpad.net/bugs/1950627

Title:
  ubuntu_kernel_selftests:net:udpgro_fwd.sh: udpgso_bench_tx: sendmsg:
  Connection refused

Status in ubuntu-kernel-tests:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Jammy:
  Confirmed
Status in linux source package in Kinetic:
  Confirmed

Bug description:
  This is from ADT testing (amd64) but I believe I occasionally saw this
  before. It feels like sometimes the receiver does not get ready before
  the transmission starts. IIRC this goes away when re-trying.

  02:52:31 DEBUG| [stdout] # selftests: net: udpgro_fwd.sh
  02:52:31 DEBUG| [stdout] # IPv4
  02:52:31 DEBUG| [stdout] # No GRO                                   ok
  02:52:32 DEBUG| [stdout] # GRO frag list                            ok
  02:52:32 DEBUG| [stdout] # GRO fwd                                  ok
  02:52:33 DEBUG| [stdout] # UDP fwd perf                            udp rx:    333 MB/s   271894 calls/s
  02:52:33 DEBUG| [stdout] # udp tx:    378 MB/s     6422 calls/s   6422 msg/s
  02:52:34 DEBUG| [stdout] # udp rx:    383 MB/s   312480 calls/s
  02:52:34 DEBUG| [stdout] # udp tx:    383 MB/s     6506 calls/s   6506 msg/s
  02:52:35 DEBUG| [stdout] # udp rx:    381 MB/s   310202 calls/s
  02:52:35 DEBUG| [stdout] # udp tx:    380 MB/s     6458 calls/s   6458 msg/s
  02:52:36 DEBUG| [stdout] # UDP GRO fwd perf                        udp rx:    344 MB/s   280814 calls/s
  02:52:36 DEBUG| [stdout] # udp tx:    389 MB/s     6612 calls/s   6612 msg/s
  02:52:37 DEBUG| [stdout] # udp rx:    364 MB/s   297088 calls/s
  02:52:37 DEBUG| [stdout] # udp tx:    383 MB/s     6512 calls/s   6512 msg/s
  02:52:38 DEBUG| [stdout] # udp rx:    448 MB/s   365435 calls/s
  02:52:38 DEBUG| [stdout] # udp tx:    453 MB/s     7686 calls/s   7686 msg/s
  02:52:39 DEBUG| [stdout] # GRO frag list over UDP tunnel            ok
  02:52:39 DEBUG| [stdout] # GRO fwd over UDP tunnel                  ok
  02:52:39 DEBUG| [stdout] # UDP tunnel fwd perf                     ./udpgso_bench_tx: sendmsg: Connection refused
  02:52:39 DEBUG| [stdout] #  fail client exit code 1, server 0
  02:52:40 DEBUG| [stdout] # UDP tunnel GRO fwd perf                 udp rx:    236 MB/s   192389 calls/s
  02:52:41 DEBUG| [stdout] # udp tx:    284 MB/s     4826 calls/s   4826 msg/s
  02:52:41 DEBUG| [stdout] # udp rx:    295 MB/s   240586 calls/s
  02:52:42 DEBUG| [stdout] # udp tx:    306 MB/s     5206 calls/s   5206 msg/s
  02:52:42 DEBUG| [stdout] # udp rx:    306 MB/s   249784 calls/s
  02:52:43 DEBUG| [stdout] # udp tx:    310 MB/s     5263 calls/s   5263 msg/s
  02:52:43 DEBUG| [stdout] # IPv6
  02:52:43 DEBUG| [stdout] # No GRO                                   ok
  02:52:43 DEBUG| [stdout] # GRO frag list                            ok
  02:52:43 DEBUG| [stdout] # GRO fwd                                  ok
  02:52:44 DEBUG| [stdout] # UDP fwd perf                            udp rx:     82 MB/s    66844 calls/s
  02:52:45 DEBUG| [stdout] # udp tx:    334 MB/s     5668 calls/s   5668 msg/s
  02:52:45 DEBUG| [stdout] # udp rx:    374 MB/s   305206 calls/s
  02:52:46 DEBUG| [stdout] # udp tx:    375 MB/s     6377 calls/s   6377 msg/s
  02:52:46 DEBUG| [stdout] # udp rx:    373 MB/s   303948 calls/s
  02:52:47 DEBUG| [stdout] # udp tx:    371 MB/s     6299 calls/s   6299 msg/s
  02:52:48 DEBUG| [stdout] # UDP GRO fwd perf                        udp rx:    340 MB/s   277046 calls/s
  02:52:48 DEBUG| [stdout] # udp tx:    389 MB/s     6601 calls/s   6601 msg/s
  02:52:49 DEBUG| [stdout] # udp rx:    390 MB/s   318311 calls/s
  02:52:49 DEBUG| [stdout] # udp tx:    391 MB/s     6639 calls/s   6639 msg/s
  02:52:50 DEBUG| [stdout] # udp rx:    396 MB/s   322528 calls/s
  02:52:50 DEBUG| [stdout] # udp tx:    406 MB/s     6891 calls/s   6891 msg/s
  02:52:50 DEBUG| [stdout] # GRO frag list over UDP tunnel            ok
  02:52:50 DEBUG| [stdout] # GRO fwd over UDP tunnel                  ok
  02:52:52 DEBUG| [stdout] # UDP tunnel fwd perf                     udp rx:     93 MB/s    76354 calls/s
  02:52:52 DEBUG| [stdout] # udp tx:    257 MB/s     4360 calls/s   4360 msg/s
  02:52:53 DEBUG| [stdout] # udp rx:    297 MB/s   241883 calls/s
  02:52:53 DEBUG| [stdout] # udp tx:    315 MB/s     5352 calls/s   5352 msg/s
  02:52:54 DEBUG| [stdout] # udp rx:    286 MB/s   233207 calls/s
  02:52:54 DEBUG| [stdout] # udp tx:    304 MB/s     5172 calls/s   5172 msg/s
  02:52:55 DEBUG| [stdout] # UDP tunnel GRO fwd perf                 udp rx:    267 MB/s   217607 calls/s
  02:52:55 DEBUG| [stdout] # udp tx:    297 MB/s     5039 calls/s   5039 msg/s
  02:52:56 DEBUG| [stdout] # udp rx:    300 MB/s   244255 calls/s
  02:52:56 DEBUG| [stdout] # udp tx:    304 MB/s     5164 calls/s   5164 msg/s
  02:52:57 DEBUG| [stdout] # udp rx:    307 MB/s   250399 calls/s
  02:52:57 DEBUG| [stdout] # udp tx:    307 MB/s     5221 calls/s   5221 msg/s
  02:52:57 DEBUG| [stdout] not ok 1 selftests: net: udpgro_fwd.sh # exit=1

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