On 17:42 Wed 01 Nov , Makia Minich wrote: > 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,
AFAIK there is option -Q which enables/disables QoS configuration, it does nothing with particular qos_high_limit parameter. Configuration parameters (qos_max_vls, qos_high_limit, qos_vlarb_high, qos_vlarb_low and qos_sl2vl templates) should be specified in opensm.opts file (or other OpenSM configuration file which does not exist yet). > 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? Yes, you need to specify QoS parameters in opensm.opts file. There is some readme file osm/doc/qos-config.txt which describes details (I think man page have similar section too). Ah, important note with OFED QoS is disabled by default in OpenSM, so -Q option should be used, which for OFED means --qos. OpenSM from trunk supports QoS configuration by default and -Q option disables this (and means --no-qos), this can be confused, I know. Sasha > > 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
