[ovs-git] Open vSwitch: tests: Avoid race condition in flow monitoring test. (master)

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commit 90d721f0559c9d7df3a164728e88336f108e67b0
Diffs: http://openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=commitdiff;h=90d721f0559c9d7df3a164728e88336f108e67b0
Author: Ben Pfaff <blp at nicira.com>
		
tests: Avoid race condition in flow monitoring test.
		
The execution of "ovs-appctl -t ovs-ofctl ofctl/send" could happen before
ovs-appctl received and printed the
    NXST_FLOW_MONITOR reply (xid=0x0):
     event=ADDED table=0 cookie=0 in_port=2 actions=output:1
msesage, which could cause the
    send: OFPT_FLOW_MOD: DEL priority=0 actions=drop
message to be printed before rather than after the NXST_FLOW_MONITOR reply.

This commit fixes the problem by inserting a serializing barrier.

Reported-by: Jarno Rajahalme <jarno.rajahalme at nsn.com>
Signed-off-by: Ben Pfaff <blp at nicira.com>


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Summary of changes:
 tests/ofproto.at |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)


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