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selftests: forwarding: Increase maximum deviation in multipath test 

We sometimes observe failures in the test due to too large discrepancy
between the measured and expected ratios. For example:

TEST: ECMP                                                          [FAIL]
        Too large discrepancy between expected and measured ratios
        INFO: Expected ratio 1.00 Measured ratio 1.11

Fix this by allowing an up to 15% deviation between both ratios.

Another possibility is to increase the number of generated flows, but
this will prolong the execution time of the test, which is already quite
high.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2018-05-03 10:51:32 +03:00 committed by David S. Miller
parent 5f110899ae
commit 9413248753
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/net/forwarding/router_multipath.sh
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@ -191,7 +191,7 @@ multipath_eval()
diff=$(echo $weights_ratio - $packets_ratio | bc -l)
diff=${diff#-}
test "$(echo "$diff / $weights_ratio > 0.1" | bc -l)" -eq 0
test "$(echo "$diff / $weights_ratio > 0.15" | bc -l)" -eq 0
check_err $? "Too large discrepancy between expected and measured ratios"
log_test "$desc"
log_info "Expected ratio $weights_ratio Measured ratio $packets_ratio"