int uwsgi_calc_cheaper(void) {
int i;
static time_t last_check = 0;
int check_interval = uwsgi.shared->options[UWSGI_OPTION_MASTER_INTERVAL];
if (!last_check)
last_check = uwsgi_now();
time_t now = uwsgi_now();
if (!check_interval)
check_interval = 1;
if ((now - last_check) < check_interval)
return 1;
last_check = now;
int needed_workers = uwsgi.cheaper_algo();
if (needed_workers > 0) {
for (i = 1; i <= uwsgi.numproc; i++) {
if (uwsgi.workers[i].cheaped == 1 && uwsgi.workers[i].pid == 0) {
if (uwsgi_respawn_worker(i))
return 0;
needed_workers--;
}
if (needed_workers == 0)
break;
}
}
else if (needed_workers < 0) {
int oldest_worker = 0;
time_t oldest_worker_spawn = INT_MAX;
for (i = 1; i <= uwsgi.numproc; i++) {
if (uwsgi.workers[i].cheaped == 0 && uwsgi.workers[i].pid > 0) {
if (uwsgi.workers[i].last_spawn < oldest_worker_spawn) {
oldest_worker_spawn = uwsgi.workers[i].last_spawn;
oldest_worker = i;
}
}
}
if (oldest_worker > 0) {
#ifdef UWSGI_DEBUG
uwsgi_log("worker %d should die...\n", oldest_worker);
#endif
uwsgi.workers[oldest_worker].cheaped = 1;
uwsgi.workers[oldest_worker].manage_next_request = 0;
uwsgi_curse(oldest_worker, SIGWINCH);
}
}
return 1;
}
void uwsgi_master_check_mercy() {
int i;
for (i = 1; i <= uwsgi.numproc; i++) {
if (uwsgi.workers[i].pid > 0 && uwsgi.workers[i].cursed_at) {
if (uwsgi_now() > uwsgi.workers[i].no_mercy_at) {
uwsgi_log_verbose("worker %d (pid: %d) is taking too much time to die...NO MERCY !!!\n", i, uwsgi.workers[i].pid);
// yes that look strangem but we avoid callign it again if we skip waitpid() call below
uwsgi_curse(i, SIGKILL);
}
}
}
}
// check for chain reload
void uwsgi_master_check_chain() {
if (!uwsgi.status.chain_reloading) return;
if (uwsgi.status.chain_reloading > uwsgi.numproc) {
uwsgi.status.chain_reloading = 0;
uwsgi_log_verbose("chain reloading complete\n");
}
int i;
uwsgi_block_signal(SIGHUP);
for(i=1;i<=uwsgi.numproc;i++) {
if (uwsgi.workers[i].pid > 0 && uwsgi.workers[i].cheaped == 0 && uwsgi.workers[i].cursed_at == 0 && i == uwsgi.status.chain_reloading) {
uwsgi_curse(i, SIGHUP);
break;
}
}
uwsgi_unblock_signal(SIGHUP);
}
