Ok, thanks you very much for your quick response. Best regards, Voravit T.
On 10/29/2011 01:35 AM, Ben Pfaff wrote: > On Sat, Oct 29, 2011 at 01:25:01AM +0200, Voravit T. wrote: >> I would like to do some experiment with Open vSwitch kernel module. >> I follow instruction as per INSTALL.Linux to compile and start the >> switch with two ports and add one flow entry that forwards from one port >> to the other. >> When I use ovs-ofctl dump-flows I can see the flow entry that I add but >> when I use ovs-dpctl dump-flows it gives no output (please see second >> section in the attached file). > Flow entries are installed in the kernel flow table (that ovs-dpctl > dump-flows prints) only when packets arrive. > >> I am wondering if this is normal or it could be some strange behaviour >> due to the way I have compiled the source code. >> By the way, is there a test tool that allows me to manage the Open >> vSwitch kernel module directly without running the database server and >> the ovs-vswicthd daemon? > No. > >> In addition, I noticed that there are 255 tables in my system with only >> the first table (0:classifier) is in used. Is there some way to remove >> the tables that I don't use? > The additional tables add an insignificant cost. There is currently > no way to turn them off. > >> I also noticed that there is a different flow table structure in Open >> vSwitch kernel module, using a kind of an array structure (flex_array). >> The old OpenFlow reference kernel module implementation uses a >> combination of two lookup tables; one hash and one linear. >> Does anyone know if there is any performance comparison between these >> types of lookup structures? > The newer organization should be faster in common usage.
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