Synergy User Manual and Tutorial. - THE CORE MEMORY

Synergy User Manual and Tutorial
[c615111@owin ~/pvm ]>aimk master slave
[c615111@owin ~/pvm ]>master
The amik command compiles the application and the executable name of the master
executable runs the application. An example of a PVM “Hello worker—Hello master”
application is below. It demonstrates the structure of a basic PVM program. The master
program is:
// master.c: “Hello worker” program
#include
#define NUM_WKRS 3
main(){
int status; // Status of operation
int tid[NUM_WKRS];// Array of task ID’s all must be unique in system
int msgtag; // Message tag to ID a message
int flag = 0; // Used to specify options for pvm_spawn
char buf[100]; // Message string buffer
char wkr_arg0 = 0;// Null argument to activate workers
char** wkr_args; // Array of args to activate workers
char host[128]; // Host machine name
// Set wkr_args to start worker program to address of wkr_arg0
// which has been set to 0 (NULL)
wkr_args = &wkr_arg0;
// Get host machine name
gethostname(host, sizeof(host));
// Get my task ID and print ID and host name to screen
printf("Master: ID is %x, name is %s\n", pvm_mytid(), host);
// Spawn a program executable named “worker”
// Will return the number of workers spawned on success or 0 on error
// The empty string (fourth arg) requests any machine
// Putting a name in this arg would request a specific machine
status = pvm_spawn("worker", wkr_args, flag, "", NUM_WKRS, tid);
// If spawn was successful it will return NUM_WKRS
// since there are NUM_WKRS workers
if(status == NUM_WKRS){
// Label first message as 1
msgtag = 1;
// Put message in buffer
sprintf(buf, "Hello worker from %s", host);
// Initialize the send message operation
pvm_initsend(PvmDataDefault);
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