On 2021/1/28 20:54, Leon Romanovsky wrote:
On Thu, Jan 28, 2021 at 02:29:43PM +0800, Xiao Yang wrote:
On 2021/1/27 20:04, Leon Romanovsky wrote:
On Wed, Jan 27, 2021 at 04:24:31PM +0800, Xiao Yang wrote:
Even if we enable sq_sig_all or IBV_SEND_SIGNALED, current rxe
module cannot set imm_data in WC when the related WR with imm_data
finished on SQ.
Signed-off-by: Xiao Yang<yangx.jy@xxxxxxxxxxxxxx>
---
Current rxe module and other rdma modules(e.g. mlx5) only set
imm_data in WC when the related WR with imm_data finished on RQ.
I am not sure if it is a expected behavior.
This is IBTA behavior.
5.2.11 IMMEDIATE DATA EXTENDED TRANSPORT HEADER (ImmDt) - 4 BYTES
"Immediate Data (ImmDt) contains data that is placed in the receive
Completion Queue Element (CQE). The ImmDt is only allowed in SEND or
RDMA WRITE packets with Immediate Data."
If I understand the spec, you shouldn't set imm_data in SQ.
Hi Leon,
About the behavior, I have another question:
For send operation with imm_data, we can verify if the delivered imm_data is
correct by CQE on RQ.
For rdma write operation with imm_data, how to verify if the delivered
imm_data is correct? :-)
Probably that I didn't understand the question, but the RDMA WRITE is
marked with special opcode in the BTH that indicates imm_data.
Hi Leon,
The quesion is about how to get the imm_data in applications(programs in
user space)
1) If client program does send operation with imm_data, server program
can get the delivered imm_data by calling ibv_poll_cq(&wc)
2) If client program does rdma write operation with imm_data, server
program cannot get the delivered imm_data by calling ibv_poll_cq(&wc).
In this case, how does server program get the delivered imm_data?
Best Regards,
Xiao Yang
Thanks
Best Regards,
Xiao Yang
Thanks
.
.
