As written before I have to connect a gen2 client with a gen1 server using CM.
The connection is established fine and both sides go into the connected state.
However I can’t send any data from none of the two sides.
As soon as I do so I get a 0x81 VAPI_RETRY_EXC_ERR when trying to send from the gen1 or a vendor_err 0x81 when trying to send from the gen2 side.
What works so far with my gen1 and gen2 code is:
Connecting gen1 client and gen1 server is no problem.
Connecting gen2 client and gen2 server is no problem.
Connecting gen1 client and gen2 server is no problem
Unfortunately the only usage scenario I have is to connect gen2 client and gen1 server. L
Is there a way to diagnose the reason for trouble when a VAPI_SEND / IBV_WR_SEND returns that 0x81 VAPI_RETRY_EXC_ERR?
It seems as if the receiving side which is sure in the receive mode does not get any notification as if the sender does not even start sending.
I already printed out the qp_state of both the gen2 client and the gen1 server before the send fails. Which look like:
Gen2 client QP state.
qp_state: 3
cur_qp_state: 3
path_mtu: 4
path_mig_state: 0
qkey: 16391
rq_psn: 5571589
sq_psn: 15025863
dest_qp_num: 10814473
qp_access_flags: 14
cap: 256
ah_attr: 256
alt_ah_attr: 29
pkey_index: 3
alt_pkey_index: 460
en_sqd_async_notify: 33022
sq_draining: 0
max_rd_atomic: 82905088
max_dest_rd_atomic: 219649539
min_rnr_timer: 0
port_num: 16384
timeout: 50331753
retry_cnt: 65795
rnr_retry: 0
alt_port_num: 0
alt_timeout: 0
Gen1 server QP state.
qp_state: 3
en_sqd_asyn_notif: 0
sq_draining: 0
qp_num: 10814473
remote_atomic_flags: 7
qkey: 0
path_mtu: 4
path_mig_state: 0
rq_psn: 15025863
sq_psn: 5571589
qp_ous_rd_atom: 4
ous_dst_rd_atom: 4
min_rnr_timer: 27
cap: 200
dest_qp_num: 200
sched_queue: 28
pkey_ix: 28
port: 460
av: 5571589
timeout: 0
retry_count: 0
rnr_retry: 1
alt_pkey_ix: 0
alt_port: 0
alt_av: 0
alt_timeout: 0
In the good cases described above the qp_state look similar to the ones described here
Any help welcome.
Thomas Bub
............................................................
Thomas Bub
Grass Valley Germany GmbH
Brunnenweg 9
64331 Weiterstadt, Germany
Tel: +49 6150 104 147
Fax: +49 6150 104 656
Email: [EMAIL PROTECTED]
www.GrassValley.com
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