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<?php
// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2014 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
ini_set("memory_limit", "2048M");
require_once("../inc/boinc_db.inc");
require_once("../inc/util.inc");
require_once("../inc/cache.inc");
define("MIN_CREDIT", 10);
define("MIN_COUNT", 10);
function compare($a, $b) {
if ($a->p_fpops < $b->p_fpops) return 1;
if ($a->p_fpops > $b->p_fpops) return -1;
return 0;
}
function get_data() {
$db = BoincDb::get(true);
// get CPU model status in a special query;
// enumerating hosts was too slow on SETI@home.
//
// Ideally a model's fpops should be the median over hosts of that model.
// But SQL has no median function.
// Instead, take the mean of plausible values
//
$x = $db->enum_fields('host', 'StdClass',
'p_model, count(*) as nhosts, avg(p_ncpus) as ncores, avg(p_fpops) as fpops',
'p_fpops>1e6 and p_fpops<1e11 and p_fpops <> 1e9 and expavg_credit>'.MIN_CREDIT.' group by p_model',
null
);
$m2 = array();
foreach ($x as $m) {
if ($m->nhosts < MIN_COUNT) continue;
$y = new StdClass;
$y->model = $m->p_model;
$y->p_fpops = $m->fpops;
$y->mean_ncores = $m->ncores;
$y->nhosts = $m->nhosts;
$m2[] = $y;
}
return $m2;
}
function get_cpu_list() {
$m2 = get_data();
uasort($m2, 'compare');
$x = new StdClass;
$x->cpus = $m2;
$x->time = time();
return $x;
foreach ($m2 as $x) {
$g = $x->p_fpops/1e9;
echo "$x->model: $g gflops $x->mean_ncores cores $x->nhosts hosts \n";
}
}
function show_cpu_list($data) {
page_head("CPU performance");
echo "
This table shows peak CPU speed
(based on Whetstone benchmarks)
of computers participating in this project.
<p>
";
start_table();
row_heading_array(
array(
"CPU model",
"Number of computers",
"Avg. cores/computer",
"GFLOPS/core",
"GFLOPs/computer"
)
);
$total_nhosts = 0;
$total_gflops = 0;
foreach ($data->cpus as $d) {
row_array(
array(
$d->model, $d->nhosts,
number_format($d->mean_ncores, 2),
number_format($d->p_fpops/1e9, 2),
number_format($d->mean_ncores*$d->p_fpops/1e9, 2)
)
);
$total_nhosts += $d->nhosts;
$total_gflops += $d->nhosts*$d->mean_ncores*$d->p_fpops/1e9;
}
row_array(
array(
"Total",
number_format($total_nhosts, 0). " computers",
"",
"",
number_format($total_gflops/1e3, 2)." TeraFLOPS"
)
);
end_table();
echo "Generated ".time_str($data->time);
page_tail();
}
$d = get_cached_data(86400);
if ($d) {
$data = unserialize($d);
} else {
$data = get_cpu_list();
set_cached_data(86400, serialize($data));
}
show_cpu_list($data);
?>
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