[ovs-discuss] [openvswitch 2.5.90] testsuite: 2224 failed

[Ilya Maximets]

There is one interesting bug:

Test 2224 (ovn -- dhcpv4 : 1 HV, 2 LS, 2 LSPs/LS) constantly fails
with 'CFLAGS=-march=native'. All other tests works normally.

Environment:

	* OVS current master:
	  commit d59831e9b08e ("bridge: No QoS configured is not an error")
	* Red Hat Enterprise Linux Server release 7.2 (Maipo)
	* Compiler: gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
	* Intel(R) Xeon(R) CPU E5-2690 v3

Test scenario:

	1. Checkout current master branch.

	2. Configure OVS with default configuration:

	   # ./boot.sh && ./configure && make

	3. Check test #2224

	   # make check TESTSUITEFLAGS='2224'
	   2224: ovn -- dhcpv4 : 1 HV, 2 LS, 2 LSPs/LS           ok

	4. Clean up

	   # make distclean

	5. Configure OVS with '-march=native':

	   # ./boot.sh && ./configure CFLAGS="-march=native" && make

	6. Check test #2224

	   # make check TESTSUITEFLAGS='2224'
	   2224: ovn -- dhcpv4 : 1 HV, 2 LS, 2 LSPs/LS           FAILED (ovn.at:3205)

Test failed because of bad packet:

./ovn.at:3205: cat 1.packets | cut -c 53-
--- expout      2016-08-05 14:29:47.205360523 +0300
+++ /ovs/tests/testsuite.dir/at-groups/2224/stdout   2016-08-05 14:29:47.215360172 +0300
@@ -1 +1 @@
-0a0000010a00000400430044011c0000020106006359aa7600000000000000000a0000040000000000000000
 f000000000010000000000000000000000000000000000000000000000000000000000000000000000000000
 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 0000000000000000000000000000000000000000000000000000000000000000638253633501020104ffffff
 0003040a00000136040a000001330400000e1000000000ff00000000
+0a0000010a00000400430044011c0000020106006359aa7600000000000000000a0000040000000000000000
 f000000000010000000000000000000000000000000000000000000000000000000000000000000000000000
 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 00000000000000000000000000000000000000000000000000000000000000006382536335010236040a0000
 010104ffffff0003040a000001330400000e1000000000ff00000000

Full log attached.

Best regards, Ilya Maximets.
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