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update_daemon2: keep track of children PIDs

This commit is contained in:
Andrew Dolgov 2008-01-24 09:43:22 +01:00
parent 96841bf3a3
commit e933840523
1 changed files with 24 additions and 9 deletions
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33
update_daemon2.php
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@ -38,7 +38,8 @@
error_reporting(DEFAULT_ERROR_LEVEL);
$running_jobs = 0;
$children = array();
$last_checkpoint = -1;
function sigalrm_handler() {
@ -46,9 +47,23 @@
}
function sigchld_handler($signal) {
global $running_jobs;
if ($running_jobs > 0) $running_jobs--;
print posix_getpid() . ": SIGCHLD received, jobs left: $running_jobs\n";
global $children;
$tmp = array();
foreach ($children as $pid) {
if (pcntl_waitpid($pid, $status, WNOHANG) != $pid) {
array_push($tmp, $pid);
} else {
_debug("[SIGCHLD] child $pid reaped.");
}
}
$children = $tmp;
$running_jobs = count($children);
_debug("[SIGCHLD] jobs left: $running_jobs");
pcntl_waitpid(-1, $status, WNOHANG);
}
@ -102,19 +117,19 @@
$next_spawn = $last_checkpoint + SPAWN_INTERVAL - time();
if ($next_spawn % 10 == 0) {
print "[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec\n";
$running_jobs = count($children);
_debug("[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec.");
}
if ($last_checkpoint + SPAWN_INTERVAL < time()) {
for ($j = $running_jobs; $j < MAX_JOBS; $j++) {
print "[MASTER] spawning client $j...";
for ($j = count($children); $j < MAX_JOBS; $j++) {
$pid = pcntl_fork();
if ($pid == -1) {
die("fork failed!\n");
} else if ($pid) {
$running_jobs++;
print "OK [$running_jobs]\n";
_debug("[MASTER] spawned client $j [PID:$pid]...");
array_push($children, $pid);
} else {
pcntl_signal(SIGCHLD, SIG_IGN);
pcntl_signal(SIGINT, SIG_DFL);