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selftests: forwarding: mirror_lib: Wait for tardy mirrored packets

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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>
This commit is contained in:
Petr Machata 2019-01-31 22:35:17 +00:00 committed by David S. Miller
parent 3dc178a9ef
commit db2c5bfcdf
1 changed files with 1 additions and 0 deletions
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tools/testing/selftests/net/forwarding/mirror_lib.sh
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@ -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.