> I tried to increase the retry_count but without success. In fact the > maximum value I could set was 7.
Retry_count is a 3 bit value, so 7 is fine. > The only thing that worries me is the timeout of 1 for the gen2 stack > which is 12 for the gen1 stack. > Is there a way to increase this? The gen2 stack calculates this value based on the packet lifetime (+1) in the path record. A value of 1 is about 8 microseconds. How did you obtain the path record that you passed into ib_send_cm_req()? It looks like the value being passed in is 0. I have no idea how gen1 gets this value, but it should be pulling it from the CM REQ message. There's a disconnect between how it gets 12, while the other side has 1, that we probably need to understand. Is the timeout still 1 when connecting gen2 to gen2? > Question about psn: > In my gen1 application I have no place where I explicitly the psn's. The > psn's are either set by qp creation or the cm kernel code (I don't know > and care it works!) > In my gen2 code I copied an example where the > ib_cm_req_param.starting_psn is explicitly set to the qp_num and the > qp_attr.rq_psn is set to qp_num in the transition from Rts to Rtr. > Whithout that last setting in Rts to Rtr even gen2 to gen2 does not > work. > Is there something that I'm missing? Based on your output, your psn values look fine. > ah_attr.is_global: 1 You're not actually trying to go between subnets are you? I think is_global should be 0 here. The gen2 stack sets this based on information from the path record. What value is in the path record hop_limit? (It may help if you just print out the path record passed into ib_send_cm_req().) > ah_attr.port_num: 1 > min_rnr_timer: 4 > port_num: 0 What is "port_num: 0" above? ah_attr.port_num looks correct. Also, for the gen1 side, you displayed "port: 1" and "av.port: 0". I would expect the port number to be >= 1. - Sean _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
