[ofa-general] Sending two integers via RDMA_WRITE

[Zafar Gilani]

Hi,

I am trying to send two integers (essentially a buf array of type uint32_t)
to the server via RDMA_WRITE method. The following is piece of code that I
rewrote:

++++++++++++++++++++++++++++++++++

  buf[0] = strtoul(argv[2], NULL, 0);
  buf[1] = strtoul(argv[3], NULL, 0);

  printf("%d + %d = ", buf[0], buf[1]);

  buf[0] = htonl(buf[0]);
  buf[1] = htonl(buf[1]);

  /* -----------------------------------
     ---- START - write operation 1 ----
     ----------------------------------- */

int c;
for(c = 0; c < 2; c++)
{
  sge.addr = (uintptr_t) buf + ((uint32_t)c*sizeof(uint32_t));
  sge.length = sizeof(uint32_t);
  sge.lkey = mr->lkey;

  send_wr.wr_id = (uint64_t)(c+1);//1;
  send_wr.opcode = IBV_WR_RDMA_WRITE;
  send_wr.sg_list = &sge;
  send_wr.num_sge = 1;
  send_wr.wr.rdma.rkey = ntohl(server_pdata.buf_rkey);
  send_wr.wr.rdma.remote_addr = ntohll(server_pdata.buf_va);

  if(ibv_post_send(cm_id->qp, &send_wr, &bad_send_wr))
        return 1;
}

++++++++++++++++++++++++++++++++++

I receive no compilation errors but it does not write to remote memory. Any
suggestions of what might be wrong?

Thanks,
-- 
Syed Zafar ul Hussan Gilani | BIT-7
Research Student | CHPSC
MSP 2008-09
NUST SEECS | http://hpc.niit.edu.pk/~zafar
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