NGX_USE_TIMER_EVENT  228 event/modules/ngx_eventport_module.c         ngx_event_flags |= NGX_USE_TIMER_EVENT;
NGX_USE_TIMER_EVENT  224 event/modules/ngx_kqueue_module.c         ngx_event_flags |= NGX_USE_TIMER_EVENT;
NGX_USE_TIMER_EVENT  628 event/ngx_event.c     if (ngx_timer_resolution && !(ngx_event_flags & NGX_USE_TIMER_EVENT)) {