Hi Oliver, On Wed, 2006-11-01 at 16:52, Oliver wrote: > Hi, folks - > > I am trying to verify and evaluate IB QoS support, running openSM as > subnet manager. The perftest program is extended to set SL as command > line options instead of default 0, and by modifying VL arbitration > tables, I am expecting to see the traffic shaping can actually take > place,
How is this being observed/measured ? > but it did not. More details on configuration: > > in opensm.opts: > # QoS default options > qos_high_limit 255 # disable low priority table This doesn't disable it but it won't be scheduled unless there are no high priority packets to send. > qos_vlarb_high: 0:4,1:4,2:8,3:0, 4:0 .... # this is to give VL 2 > (corresponding to SL 2) a higher weight 8 > qos_sl2vl 0,1,2,3,4, ... # no changes here > > I think (though not verified) the Voltaire HCA we are using can > support 8 data VLs. Yes, 8 VLs should be supported in your subnet. You can verify this with smpquery portinfo on the HCA port and examine OperVLs assuming the port is ACTIVE. > I don't have much more information to go on why > qos shaping is not taking place, any suggestions? Sasha's email is a good start. We can go from there. > A related question is, if I modify qos setting in SM, do I need to > restart SA on each hosts for it to see the changes? (I am hoping not, > as I tried in the test, it doesn't seem to make a difference) Not sure what you mean. SA is tightly coupled with the OpenSM. Do you mean SA client ? The client hosts don't need restarting but did you restart OpenSM with your QoS configuration ? BTW, which OpenSM are you running ? -- Hal > Thanks for help. _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
