[ofa-general] Bogus Receive Completions

[Roman Kononov]

On 2008-01-23 18:31, Roman Kononov wrote:
> On 2008-01-23 17:32, Roland Dreier wrote:
>> I'd be curious to run it.  It can't hurt to have the test...
> 
> This is similar to my previous program. The difference is that this one 
> makes many (up to 10, in test_create()) sets of SQ+RQ+CQ in struct 
> conn_t, which share a single Completion Channel in struct ctx_t. Every 
> conn_t has a ring of receive buffers, a ring of send buffers, send 
> sequence number, receive sequence number. Every time a buffer is sent, 
> just before ibv_post_send() call, the send sequence number is placed 
> into the buffer, imm_data and wr_id. Upon Send Completion, wr_id and the 
> sent buffer must contain the expected send sequence number. Every time a 
> buffer is received, just before ibv_post_recv() call, the receive 
> sequence number is placed into wr_id. Upon Receive Completion, wr_id, 
> the received buffer and imm_data must contain the expected receive 
> sequence number. These 2 "musts" are sometimes violated. In my setup 
> assertion fails in lines 303 (receiver) and 287 (sender).
> 
> The program has 2 threads. The first one reads the completion channel, 
> validates the Send and Receive Completions, issues ibv_post_recv() and 
> ibv_post_send(). The second one can only issue ibv_post_send().
> 
> The program makes 2 QP. Increasing the number of QP seemly does not 
> increase the probability of failure.
> 
> The program prints <time: iteration_#_for_QP_#0 iteration_#_for_QP_#1>.
> 
> In my setup, it seems that if I run two pairs of the program, the 
> failure occurs sooner.
> 
> Roman
> 

Sorry, I forgot the program...
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