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selftests: forwarding: mirror_gre_changes: Fix TTL test

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When running in a simulator, the TTL change takes a while to settle and
during this time the performance of the packet processing is lowered.
The resulting instability leads to ping sending more packets as it
assumes some have been dropped. This then leads to regular spurious
failures as more packets than expected are observed.

Sleep a bit to give the system time to stabilize.

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 22:35:15 +00:00 committed by David S. Miller
parent f3b05bb819
commit 3dc178a9ef
1 changed files with 1 additions and 0 deletions
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tools/testing/selftests/net/forwarding/mirror_gre_changes.sh
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@ -79,6 +79,7 @@ test_span_gre_ttl()
mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 0
ip link set dev $tundev type $type ttl 50
sleep 2
mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 10
ip link set dev $tundev type $type ttl 100