Commit 511ad4c2 authored Jul 15, 2025 by Jakub Kicinski

selftests: packetdrill: correct the expected timing in tcp_rcv_big_endseq

Commit f5fda1a8 ("selftests/net: packetdrill: add tcp_rcv_big_endseq.pkt")
added this test recently, but it's failing with:

  # tcp_rcv_big_endseq.pkt:41: error handling packet: timing error: expected outbound packet at 1.230105 sec but happened at 1.190101 sec; tolerance 0.005046 sec
  # script packet:  1.230105 . 1:1(0) ack 54001 win 0
  # actual packet:  1.190101 . 1:1(0) ack 54001 win 0

It's unclear why the test expects the ack to be delayed.
Correct it.

Link: https://patch.msgid.link/20250715142849.959444-1-kuba@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

parent 410b0ace

tools/testing/selftests/net/packetdrill/tcp_rcv_big_endseq.pkt

+1 −1

Original line number	Diff line number	Diff line
		@@ -38,7 +38,7 @@

		// If queue is empty, accept a packet even if its end_seq is above wup + rcv_wnd
		+0 < P. 4001:54001(50000) ack 1 win 257
		+.040 > . 1:1(0) ack 54001 win 0
		+0 > . 1:1(0) ack 54001 win 0

		// Check LINUX_MIB_BEYOND_WINDOW has been incremented 3 times.
		+0 `nstat \| grep TcpExtBeyondWindow \| grep -q " 3 "`