Initializing huge buffers with rand() takes too much time causing iWARP MPA timeout.

[yuvalbason]

During MPA negotiation, when passive side gets MPA receive packet, the RDMA-CM stack creates connection resources (PD, MR, CQ, QP) and initiates MPA offload. The active side, who initiated the MPA connection sets a timer that times out in case of huge buffers (initiating those buffers takes more than reasonable MPA timeout). I think that in this case, perftest should support an option to skip buffer initialization - for (i = 0; i < ctx->buff_size; i++) { ((char*)ctx->buf[qp_index])[i] = (char)rand();

[dimasique1]

Yuval, Thanks for the contribution! Such a PR will be appreciated.