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rpma_send_with_imm(3) RPMA Programmer's Manual rpma_send_with_imm(3)


rpma_send_with_imm - initiate the send operation with immediate data


#include <librpma.h>
struct rpma_conn;
struct rpma_mr_local;
int rpma_send_with_imm(struct rpma_conn *conn, const struct rpma_mr_local *src,
size_t offset, size_t len, int flags, uint32_t imm,
const void *op_context);


rpma_send_with_imm() initiates the send operation with immediate data which transfers a message from the local memory to other side of the connection. To send a 0 byte message, set src to NULL and both offset and len to 0.

The attribute flags set the completion notification indicator:

  • RPMA_F_COMPLETION_ON_ERROR - generate the completion on error
  • RPMA_F_COMPLETION_ALWAYS - generate the completion regardless of result of the operation.

op_context is returned in the wr_id field of the completion (struct ibv_wc).


The rpma_send_with_imm() function returns 0 on success or a negative error code on failure.


rpma_send_with_imm() can fail with the following errors:

  • RPMA_E_INVAL - conn == NULL || flags == 0
  • RPMA_E_INVAL - src == NULL && (offset != 0 || len != 0)
  • RPMA_E_PROVIDER - ibv_post_send(3) failed


rpma_conn_req_connect(3), rpma_mr_reg(3), librpma(7) and

29 May 2023 RPMA