On May 9, 2012, at 9:52 AM, <ludovic.hab...@ext.bull.net> wrote: > About changeset 26385: ompi/mca/btl/openib/btl_openib_component.c > > I might be wrong but I think that the speed we put in > openib_btl->super.btl_bandwidth is the speed of one link. It will be multiply > by the number of links (*4, ib_port_attr->active_width) to obtain the correct > speed. > > Thus, the correct speed should be 8000 and not 32000. I joined a potential > patch if I'm right.
I think you might be right, but then how is case 4 different than case 8? I don't have any QDR or FDR equipment -- what's the typical active_width for QDR and FDR? QDR is 32000, so is that active_speed of 4 and active_width of 4? (8000 * 4 = 32000)? FDR is 56000 (right? I haven't kept up with IB specs since Cisco killed IB...), so what are its active_speed and active_width values? -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
