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<?php
// Use this script to find an optimal value for fp_benchmark_weight.
// This evaluates the variation for weights 0, .1, ... 1.
require_once("../inc/db.inc");
db_init();
function mean($x) {
$sum = 0;
$n = count($x);
for ($i=0; $i<$n; $i++) {
$sum += $x[$i];
}
return $sum/$n;
}
function spread($x) {
$sum = 0;
$n = count($x);
$m = mean($x);
for ($i=0; $i<$n; $i++) {
$d = $x[$i] - $m;
$sum += $d*$d;
}
return sqrt($sum)/$n;
}
function cc($x, $fpw) {
$cps = $x->p_fpops*$fpw + $x->p_iops*(1-$fpw);
$cps /= 1e9;
$cps /= 864;
$cc = $x->cpu_time * $cps;
//if ($x->duration_correction_factor) {
// $cc /= $x->duration_correction_factor;
//}
return $cc;
}
// $x is a vector of objects
//
function handle_wu($x) {
$cc = array();
for ($i=0; $i<=12; $i++) {
array_push($cc, array());
}
for ($j=0; $j<count($x); $j++) {
$y = $x[$j];
for ($i=0; $i<=12; $i++) {
$r = $i/10.;
array_push($cc[$i], cc($y, $r));
}
}
$res = array();
for ($i=0; $i<=12; $i++) {
$c = $cc[$i];
$m = mean($c);
$s = spread($c);
$rs = $s/$m;
array_push($res, $rs);
}
return $res;
}
function get_data() {
$sum = array();
for ($i=0; $i<=12; $i++) {
array_push($sum, 0);
}
$r1 = mysql_query(
"select id from workunit where canonical_resultid>0 limit 10000"
);
$n = 0;
while ($wu = mysql_fetch_object($r1)) {
$x = array();
$r2 = mysql_query("select * from result where workunitid=$wu->id");
$found_zero = false;
while ($result = mysql_fetch_object($r2)) {
if ($result->granted_credit==0) continue;
if ($result->claimed_credit==0) $found_zero = true;
$host = lookup_host($result->hostid);
$y->claimed_credit = $result->claimed_credit;
$y->granted_credit = $result->granted_credit;
$y->cpu_time = $result->cpu_time;
$y->p_fpops = $host->p_fpops;
$y->p_iops = $host->p_iops;
$y->duration_correction_factor = $host->duration_correction_factor;
$y->id = $result->id;
array_push($x, $y);
}
if (count($x)==0) continue;
if ($found_zero) continue;
$res = handle_wu($x);
for ($i=0; $i<=12; $i++) {
$sum[$i] += $res[$i];
}
$n++;
}
for ($i=0; $i<=12; $i++) {
$r = $sum[$i]/$n;
echo "$i $r\n";
}
}
get_data();
?>
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