gm_simple_example_send.c File Reference

#include <stdlib.h>
#include <stdio.h>
#include "gm.h"
#include "gm_simple_example.h"

---

Detailed Description

Simple Send/Recv for GM Author: Max Stern (Myricom) Based on a program by Cam Macdonell - University of Alberta

Syntax: gm_simple_example_send [<local_board_num>]

The default for <local_board_num> is 0.

Description:

This program, together with gm_simple_example_recv, serves as a super- simple example of sending and receiving in GM, using both the basic send (gm_send type) and the directed send (gm_directed_send type) paradigms.

This program, the "sender" or master process, takes the following main actions (see commentary in the code below for the "how" details):

• loops on gm_receive() until it receives two messages. It assumes that the first of these contains the receiver's node id, and that the second contains the receiver's directed-send buffer address;

• uses gm_directed_send_with_callback() to copy a message directly into the receiver's memory (note: the receiver does not do a gm_receive());

• uses gm_send_to_peer_with_callback() to transmit a normal message, which the receiver will get via gm_receive();

• loops on gm_receive() until both the send callbacks have been consumed;

• exits.

Usage Note:

Assume the sender is to run on board 1 on hosta, and the receiver on board 0 on hostb. The commands would look like this:

First, on hostb: hostb> gm_simple_example_recv hosta:1

Then, on hosta: hosta> gm_simple_example_send 1

See also the Description in gm_simple_example_recv.c.

---