It just so happens that we've started looking at this here at ORNL as well. I had a question about the options. The manpage makes it seem that you can set these qos options (e.g. qos_high_limit) from the command line, but I haven't been overly successful. Is there an example of this being done? Or is changing the /var/cache/osm/opensm.opts file the preferred method of changing the options?
Sasha Khapyorsky wrote: > On 16:52 Wed 01 Nov , 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, but it did not. More details on configuration: >> >> in opensm.opts: >> # QoS default options >> qos_high_limit 255 # disable low priority table >> 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. I don't have much more information to go on why >> qos shaping is not taking place, any suggestions? > > You can verify actual port's parameters with smpquery (from diags), you > will need to run to get QoS related parameters: > > smpquery portinfo ... > smpquery vlarb ... > smpquery sl2vl ... > > Sasha > >> 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) >> >> Thanks for help. >> -- >> Oliver >> >> _______________________________________________ >> openib-general mailing list >> [email protected] >> http://openib.org/mailman/listinfo/openib-general >> >> To unsubscribe, please visit >> http://openib.org/mailman/listinfo/openib-general >> > > _______________________________________________ > openib-general mailing list > [email protected] > http://openib.org/mailman/listinfo/openib-general > > To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general > > -- Makia Minich <[EMAIL PROTECTED]> National Center for Computation Science Oak Ridge National Laboratory Phone: 865.574.7460 _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
