On Wed, Jul 19, 2017 at 08:57:08PM +0200, NOUGNANKE KOKOUVI BENOIT wrote:
> I am trying to understand the openvswitch source code, in order to
> customize some treatments.
> For example, I would like, when a packet is received on the OVS bridge, to
> know all the functions that are called and the processing that the packet
> undergoes.
> So I added VLOG_DBG ("....") in some functions. After configuring the Vlog
> with (ovs-appctl vlog / set ..) and checking the log files I do not see any
> of my VLOG_DBG messages.
> So I would like to know if someone could help me on this subject or propose
> me methods that are used for debugging when modifying the source code of
> OVS, like doing debugging with "printf" in a  source code.

By default, messages at "debug" level are not logged.  You can turn up
the log level, or you can use "info" level (or higher), which are logged
by default.
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