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selftests/net: packetdrill: unflake tcp_user_timeout_user-timeout-probe.pkt

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This test fails the first time I am running it after a fresh virtme-ng boot.

tcp_user_timeout_user-timeout-probe.pkt:33: runtime error in write call: Expected result -1 but got 24 with errno 2 (No such file or directory)

Tweaks the timings a bit, to reduce flakiness.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Soham Chakradeo <sohamch@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Tested-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20251014171907.3554413-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet
2025-10-14 17:19:02 +00:00
committed by Jakub Kicinski
parent 01b6aca22b
commit 56cef47c28
1 changed files with 4 additions and 2 deletions
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6
tools/testing/selftests/net/packetdrill/tcp_user_timeout_user-timeout-probe.pkt
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@@ -23,14 +23,16 @@
// install a qdisc dropping all packets
+0 `tc qdisc delete dev tun0 root 2>/dev/null ; tc qdisc add dev tun0 root pfifo limit 0`
+0 write(4, ..., 24) = 24
// When qdisc is congested we retry every 500ms
// (TCP_RESOURCE_PROBE_INTERVAL) and therefore
// we retry 6 times before hitting 3s timeout.
// First verify that the connection is alive:
+3.250 write(4, ..., 24) = 24
+3 write(4, ..., 24) = 24
// Now verify that shortly after that the socket is dead:
+.100 write(4, ..., 24) = -1 ETIMEDOUT (Connection timed out)
+1 write(4, ..., 24) = -1 ETIMEDOUT (Connection timed out)
+0 %{ assert tcpi_probes == 6, tcpi_probes; \
assert tcpi_backoff == 0, tcpi_backoff }%