On Wed, Mar 18, 2009 at 5:53 AM, Hal Rosenstock <[email protected]> wrote: > On Wed, Mar 18, 2009 at 5:44 AM, Sasha Khapyorsky <[email protected]> wrote: >> On 18:17 Tue 17 Mar , Dave Olson wrote: >>> On Tue, 17 Mar 2009, Hal Rosenstock wrote: >>> | On Tue, Mar 17, 2009 at 3:02 PM, Ted H. Kim <[email protected]> wrote: >>> | > Is there way to config 4K IB MTU with OpenSM? >>> | > What's the option of file setting for that? >>> | >>> | See the partition configuration section in the man page or >>> | opensm/doc/partition-config.txt. It's something like: >>> | >>> | Default=0x7fff,ipoib,mtu=5:ALL=full; >> >> This will use this MTU value for IPoIB multicast group. >> >> As far as I understood Ted's question was "how to setup port's MTU using >> OpenSM". Assuming so I don't think that OpenSM has such functionality >> now (although it should not be very hard to add). > > Do you mean admin the port's MTU ? If so, why would there be such a need ? > > The only time it might be needed would be to select a lower MTU than > the peers support.
In short, if the peer ports both advertise 4K MTU being supported, then most SMs (including OpenSM) will set the link to run at that. -- Hal > That was done for Tavor for a performance issue. Do > you envision some other need ? > > -- Hal > >> Sasha > _______________________________________________ > general mailing list > [email protected] > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general > > To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general > _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
