selftests: forwarding: mirror_lib: Wait for tardy mirrored packets

When running in an environment with poor performance (such as a
simulator), processing mirrored packets can take a while. Evaluating the
condition too soon leads to spurious "seen 9, expected 10" failures as
the last packet doesn't have enough time to get mirrored and the mirror
to arrive and bump the observed counters.

Wait for one ping interval before evaluating the test.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/forwarding/mirror_lib.sh b/tools/testing/selftests/net/forwarding/mirror_lib.sh
index 878f8d53327a34fcc0c63251b9da89e0b94720d9..00797597fcf5f229c4942e671a817d2b92eb5465 100644 (file)
--- a/tools/testing/selftests/net/forwarding/mirror_lib.sh
+++ b/tools/testing/selftests/net/forwarding/mirror_lib.sh
@@ -34,6 +34,7 @@ mirror_test()
        ip vrf exec $vrf_name \
           ${PING} ${sip:+-I $sip} $dip -c 10 -i 0.5 -w $ping_timeout \
                   &> /dev/null
+       sleep 0.5
        local t1=$(tc_rule_stats_get $dev $pref)
        local delta=$((t1 - t0))
        # Tolerate a couple stray extra packets.