[ofa-general] Question: Verbs API Error code recover

[Wei Fang]

Hi, Dotan:

Thank you for your answer. Actually When I got that error, I quit my 
program and restart my program to reconnect the QPs. But I still got 
error for all of the later WR.  I have to restart computer. Before I use 
OFED,  my program is based on old Mellanox's verb API. I didn't find any 
problem for that. So I don't know why for that.

Dotan Barak wrote:
> Hi.
>
> Wei Fang wrote:
>> Hi, All:
>>
>> I'm new here just some days ago. Right now I'm facing a problem to 
>> using OFED 1.2.5's verb api.   In my programming, I use RDMA Write 
>> function to transfer data ( ibv_post_send ). Then I use ibv_poll_cq 
>> to get this CQ's finish.  Sometimes, ibv_poll_cq's return error is 
>> IBV_WC_RETRY_EXC_ERR (error code is 12).  When this error code 
>> happen,  any next transfer will always fail.  In this case, I have to 
>> restart computer.  Anyone can tell me how to recover this error 
>> without quit program or restart PC?
>>
>
> If you have a completion with status IBV_WC_RETRY_EXC_ERR your QP 
> state will be moved to error, so all of the WR that you will post 
> after this will fail too.
> If you have this failure you need to reconnect the QPs (i don't know 
> why you need to restart the computer in order to fix this ....).
>
>
> I think that you need to check why you got this completion status from 
> the first place (did the remote side close the QP?)
>

> Dotan
>
>

-- 
Best Regards

Wei Fang

Hermes Microvision Inc.

(Tel)       (408)597-8600
(Fax)       (408)597-8601
(Direct Tel)(408)597-8646

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