Re: Support for Memory windows.

Romulo Goncalves
2010-11-18T12:45:19Z

On 16/11/10 14:01, Tziporet Koren wrote:
> On 11/15/2010 5:06 PM, Romulo Goncalves wrote:
>> Hello,
>>
>> For my PhD project I have been using RDMA over inifiniband.
>> Until now I have used memory regions, but now I would like to also
>> define memory windows.
>>
>> The steps taken are the following ones:
>> Register a memory region.
>> Alloc a window
>> bind the window to the registered memory region.
>>
>> The memory region registration worked as expected, however, the call
>> of the function to alloc the memory window did not.
>> It seems there is not an implementation for the functions to alloc,
>> bind, and dealloc a memory window.
>>
>> I looked into verbs.h and I found the reference to the functions in
>> the context_ops:
>>
>> struct ibv_context_ops {
>> ....
>> struct ibv_mw * (*alloc_mw)(struct ibv_pd *pd, enum
>> ibv_mw_type type);
>> int (*bind_mw)(struct ibv_qp *qp, struct
>> ibv_mw *mw, struct ibv_mw_bind *mw_bind);
>> int (*dealloc_mw)(struct ibv_mw *mw);
>> ....
>> }
>>
>> However, I do not see their declaration or implementation anywhere else.
>> Could be the version of my openfabrics does not support memory windows?
>>
> Memory Windows have not been implemented
>
> Tziporet
That's bad news for me.
Is there any plans to implement it in a near future?

Romulo