User Manual

| *co = !!(value & 2)
|
| return value & 1
| }
|
| #define MASK_IS_SET(mask, attr) (!!((mask)&(attr)))
| bit_position = 1
| carry = 0
| atomic_response = 0
|
| for i = 0 to 63
| {
| if ( i != 0 )
| bit_position = bit_position << 1
|
| bit_add_res = bit_adder(carry, MASK_IS_SET(*va, bit_position),
| MASK_IS_SET(compare_add, bit_position), &new_carry)
| if (bit_add_res)
| atomic_response |= bit_position
|
| carry = ((new_carry) && (!MASK_IS_SET(compare_add_mask, bit_position)))
| }
|
| return atomic_response
Rev 2.3-1.0.1
Mellanox Technologies
151
3.2.6.2 XRC - eXtended Reliable Connected Transport Service for InfiniBand
XRC allows significant savings in the number of QPs and the associated memory resources
required to establish all to all process connectivity in lar
ge clusters.
It significantly improves the scalability of the solution for large clusters of multicore end-nodes
by reducing the required resources.
For further details, please refer to the "Annex A14 Supplement to InfiniBand Architecture Speci-
fication Volume 1.2.1"
A new API can be used by user space applications to work with the XRC transport. The legacy
API is currently supported in both binary and source modes, however it is deprecated.
Thus we
recommend using the new API.
The new verbs to be used are:
• ibv_open_xrcd/ibv_close_xrcd
• ibv_create_srq_ex
• ibv_get_srq_num
• ibv_create_qp_ex
• ibv_open_qp
Please use ibv_xsrq_pingpong for basic tests and code reference. For detailed information
regarding the various options for these verbs, please refer to their appropriate man pages.