Questions about masked atomic

liweihang <liweihang@xxxxxxxxxx> · Mon, 11 May 2020 13:54:48 +0000

Hi All,

I have two questions about masked atomic (Masked Compare and Swap & MFetchAdd):

1. The kernel now supports masked atomic, but the it does not support atomic
   operation. Is the masked atomic valid in kernel currently?
2. In the userspace, ofed does not have the corresponding opcode for the masked
   atomic (IB_WR_MASKED_ATOMIC_CMP_AND_SWP, IB_WR_MASKED_ATOMIC_FETCH_AND_ADD),
   and ibv_send_wr also has no related data segment for it. How to support it in
   userspace?

Thanks
Weihang