function main()
{
/****************************
* Model specific variables *
****************************/
$noNodes = 0;
$noStreams = 0;
$tech = APPROX;
// EXACT
$pop = 0;
$think = 0.0;
/************************
* Initialize the model *
************************/
/* Give model a name */
printf("**** %s ****:\n", $tech == EXACT ? "EXACT" : "APPROX");
printf("%s\t\t%s\t\t%s\t\t%s\t\t%s\n", "POP", "N:w1", "RESP:w1", "N:w2", "RESP:w2");
printf("-----------------------------------------------------------------------------\n");
for ($pop = 1; $pop < 10; $pop++) {
PDQ_Init("Test_Exact_calc");
/* Define the workload and circuit type */
$noStreams = PDQ_CreateClosed("w1", TERM, 1.0 * $pop, $think);
$noStreams = PDQ_CreateClosed("w2", TERM, 1.0 * $pop, $think);
/* Define the queueing center */
$noNodes = PDQ_CreateNode("node", CEN, FCFS);
/* Define service demand */
PDQ_SetDemand("node", "w1", 1.0);
PDQ_SetDemand("node", "w2", 0.5);
/*******************
* Solve the model *
*******************/
PDQ_Solve($tech);
printf("%d\t\t%d\t\t%3.4f\t\t%d\t\t%3.4f\n", $pop, getjob_pop(getjob_index("w1")), PDQ_GetResponse(TERM, "w1"), getjob_pop(getjob_index("w1")), PDQ_GetResponse(TERM, "w2"));
}
}
function main()
{
global $job;
/****************************
* Model specific variables *
****************************/
$noNodes = 0;
$noStreams = 0;
$pop = 0;
$servers = 2;
$s = 0;
$w = HOMEPG;
$work = array(0 => "stress", 1 => "homepg");
/* stress */
/* homepg */
$time = array(0 => 0.0044, 1 => 0.03);
$slave = array(0 => "slave0", "slave1", "slave2", "slave3", "slave4", "slave5", "slave6", "slave7", "slave8", "slave9", "slave10", "slave11", "slave12", "slave13", "slave14", "slave15");
if (PREFORK) {
printf("Pre-Fork Model under \"%s\" Load (m = %d)\n", $w == STRESS ? $work[STRESS] : $work[HOMEPG], $servers);
} else {
printf("Forking Model under \"%s\" Load \n", $w == STRESS ? $work[STRESS] : $work[HOMEPG]);
}
printf("N\tX\tR\n");
for ($pop = 1; $pop <= 10; $pop++) {
PDQ_Init("HTTPd_Server");
$noStreams = PDQ_CreateClosed($work[$w], TERM, 1.0 * $pop, 0.0);
$noNodes = PDQ_CreateNode("master", CEN, FCFS);
if (PREFORK) {
for ($s = 0; $s < $servers; $s++) {
$noNodes = PDQ_CreateNode($slave[$s], CEN, FCFS);
}
PDQ_SetDemand("master", $work[$w], 0.0109);
for ($s = 0; $s < $servers; $s++) {
PDQ_SetDemand($slave[$s], $work[$w], $time[$w] / $servers);
}
} else {
/* FORKING */
$noNodes = PDQ_CreateNode("forks", CEN, ISRV);
PDQ_SetDemand("master", $work[$w], 0.0165);
PDQ_SetDemand("forks", $work[$w], $time[$w]);
}
PDQ_Solve(EXACT);
printf("%3.2f\t%3.4f\t%3.4f\n", getjob_pop(getjob_index($work[$w])), PDQ_GetThruput(TERM, $work[$w]), PDQ_GetResponse(TERM, $work[$w]));
}
}
function exact()
{
global $streams, $nodes;
// extern int
global $node;
// extern NODE_TYPE *
global $job;
// extern JOB_TYPE *
global $s1, $s2, $s3, $s4;
// extern char []
global $qlen;
$p = "exact()";
// char *
$n0 = 0;
// int
$n1 = 0;
// int
$n2 = 0;
// int
$pop = array();
//int[MAXCLASS] = {0, 0, 0}; /* pop vector */
$N = array();
// int[MAXCLASS] = {0, 0, 0}; /* temp counters */
$sumR = array();
// double[MAXCLASS] = {0.0, 0.0, 0.0};
for ($c = 0; $c < MAXCLASS; $c++) {
$pop[$c] = 0;
$N[$c] = 0;
$sumR[$c] = 0.0;
}
$c = 0;
//int
$k = 0;
// int
if ($streams > MAXCLASS) {
printf("Streams = %d", $streams);
$s1 = sprintf("%d workload streams exceeds maximum of 3.\n", $streams);
errmsg($p, $s1);
}
for ($c = 0; $c < $streams; $c++) {
$pop[$c] = (int) ceil((double) getjob_pop($c));
if ($pop[$c] > MAXPOP1 || $pop[$c] > MAXPOP2) {
$s1 = sprintf("Pop %d > allowed:\n", $pop[$c]);
$s2 = sprintf("max1: %d\nmax2: %d\n", MAXPOP1, MAXPOP2);
errmsg($p, $s1 . $s2);
}
}
/* initialize lowest queue configs on each device */
for ($k = 0; $k < $nodes; $k++) {
$qlen[0][0][$k] = 0.0;
}
/* MVA loop starts here .... */
for ($n0 = 0; $n0 <= $pop[0]; $n0++) {
for ($n1 = 0; $n1 <= $pop[1]; $n1++) {
for ($n2 = 0; $n2 <= $pop[2]; $n2++) {
if ($n0 + $n1 + $n2 == 0) {
continue;
}
$N[0] = $n0;
$N[1] = $n1;
$N[2] = $n2;
for ($c = 0; $c < MAXCLASS; $c++) {
$sumR[$c] = 0.0;
if ($N[$c] == 0) {
continue;
}
$N[$c] -= 1;
for ($k = 0; $k < $nodes; $k++) {
$node[$k]->qsize[$c] = $qlen[$N[1]][$N[2]][$k];
$node[$k]->resit[$c] = $node[$k]->demand[$c] * (1.0 + $node[$k]->qsize[$c]);
$sumR[$c] += $node[$k]->resit[$c];
}
$N[$c] += 1;
switch ($job[$c]->should_be_class) {
case TERM:
if ($sumR[$c] == 0) {
errmsg($p, "sumR is zero");
}
$job[$c]->term->sys->thruput = $N[$c] / ($sumR[$c] + $job[$c]->term->think);
$job[$c]->term->sys->response = $N[$c] / $job[$c]->term->sys->thruput - $job[$c]->term->think;
$job[$c]->term->sys->residency = $N[$c] - $job[$c]->term->sys->thruput * $job[$c]->term->think;
break;
case BATCH:
if ($sumR[$c] == 0) {
errmsg($p, "sumR is zero");
}
$job[$c]->batch->sys->thruput = $N[$c] / $sumR[$c];
$job[$c]->batch->sys->response = $N[$c] / $job[$c]->batch->sys->thruput;
$job[$c]->batch->sys->residency = $N[$c];
break;
default:
break;
}
}
for ($k = 0; $k < $nodes; $k++) {
$qlen[$n1][$n2][$k] = 0.0;
for ($c = 0; $c < MAXCLASS; $c++) {
if ($N[$c] == 0) {
continue;
}
switch ($job[$c]->should_be_class) {
case TERM:
$qlen[$n1][$n2][$k] += $job[$c]->term->sys->thruput * $node[$k]->resit[$c];
$node[$k]->qsize[$c] = $qlen[$n1][$n2][$k];
break;
case BATCH:
$qlen[$n1][$n2][$k] += $job[$c]->batch->sys->thruput * $node[$k]->resit[$c];
$node[$k]->qsize[$c] = $qlen[$n1][$n2][$k];
break;
default:
break;
}
}
}
}
/* over n2 */
}
/* over n1 */
}
/* over n0 */
}