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selftests: net: packetdrill: xfail all problems on slow machines

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We keep seeing flakes on packetdrill on debug kernels, while
non-debug kernels are stable, not a single flake in 200 runs.
Time to give up, debug kernels appear to suffer from 10msec
latency spikes and any timing-sensitive test is bound to flake.

Reviewed-by: Willem de Bruijn <willemb@google.com>
Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250801181638.2483531-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2025-08-01 11:16:38 -07:00
parent 01d3c8417b
commit 5ef7fdf52c
1 changed files with 1 additions and 18 deletions
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19
tools/testing/selftests/net/packetdrill/ksft_runner.sh
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@ -35,24 +35,7 @@ failfunc=ktap_test_fail
if [[ -n "${KSFT_MACHINE_SLOW}" ]]; then
optargs+=('--tolerance_usecs=14000')
# xfail tests that are known flaky with dbg config, not fixable.
# still run them for coverage (and expect 100% pass without dbg).
declare -ar xfail_list=(
"tcp_blocking_blocking-connect.pkt"
"tcp_blocking_blocking-read.pkt"
"tcp_eor_no-coalesce-retrans.pkt"
"tcp_fast_recovery_prr-ss.*.pkt"
"tcp_sack_sack-route-refresh-ip-tos.pkt"
"tcp_slow_start_slow-start-after-win-update.pkt"
"tcp_timestamping.*.pkt"
"tcp_user_timeout_user-timeout-probe.pkt"
"tcp_zerocopy_cl.*.pkt"
"tcp_zerocopy_epoll_.*.pkt"
"tcp_tcp_info_tcp-info-.*-limited.pkt"
)
readonly xfail_regex="^($(printf '%s|' "${xfail_list[@]}"))$"
[[ "$script" =~ ${xfail_regex} ]] && failfunc=ktap_test_xfail
failfunc=ktap_test_xfail
fi
ktap_print_header