Yes, check out the btl_openib_max_lmc MCA parameter:
shell$ ompi_info --param btl openib --parsable | grep lmc
On Sep 21, 2010, at 11:45 AM, Jens Domke wrote:
> Hello,
>
> the InfiniBand architecture has a LMC feature to assign mutiple virtual LIDs to one port and so provides multiple paths between two ports. Is there a methode in openmpi to enable message-striping over these paths to increase bandwidth or avoid congestions?
> (I don't mean the multirail feature, to split traffic across two ports of one Hca)
> The only function I have found, was to enable automatic path migration over lmc, but this is only for failover, if I remember rightly.
>
> Regards,
> Jens
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Jeff Squyres
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