[ofa-general] OpenIB development help

[Bharath Ramesh]

* Roland Dreier (rdreier at cisco.com) wrote:
>  > Perhaps you should use uDAPL/kDAPL ( http://www.datcollaborative.org/ ).
>  > It's more documented and it's more portable. It works with Infiniband and iWARP
>  > (http://en.wikipedia.org/wiki/IWARP).
> 
> Oh no!!
> 
> First of all I don't know of any kDAPL implementation for any OS that
> is still being developed.  Everyone completely gave up on kDAPL a long
> time ago.
> 
> And if all you care about is being able to work on top of IB and
> iWARP, then libibverbs + librdmacm works perfectly fine without having
> to add another layer and all the complexity of DAPL.  And you don't
> have to worry about code like (from dapl/common/dapl_cookie.c):
> 
>     new_head = (dapl_os_atomic_read (&buffer->head) + 1) % buffer->pool_size;
> 
>     if ( new_head == dapl_os_atomic_read (&buffer->tail) )
>     {
>         dat_status = DAT_INSUFFICIENT_RESOURCES;
> 	goto bail;
>     }
>     else
>     {
>         dapl_os_atomic_set (&buffer->head, new_head);
> 
> 	*cookie_ptr = &buffer->pool[dapl_os_atomic_read (&buffer->head)];
> 	dat_status = DAT_SUCCESS;
>     }
> 

I care about only working over IB. I dont want to add anymore layers of
software because I want to minimize the number of software layers that I
need to traverse.

Thanks,

Bharath

---
Bharath Ramesh       <bramesh at vt.edu>       http://people.cs.vt.edu/~bramesh