--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#include "msg/Message.h"
+#include "DispatchQueue.h"
+#include "Messenger.h"
+#include "common/ceph_context.h"
+
+#define dout_subsys ceph_subsys_ms
+#include "common/debug.h"
+
+
+/*******************
+ * DispatchQueue
+ */
+
+#undef dout_prefix
+#define dout_prefix *_dout << "-- " << msgr->get_myaddr() << " "
+
+double DispatchQueue::get_max_age(utime_t now) const {
+ Mutex::Locker l(lock);
+ if (marrival.empty())
+ return 0;
+ else
+ return (now - marrival.begin()->first);
+}
+
+uint64_t DispatchQueue::pre_dispatch(Message *m)
+{
+ ldout(cct,1) << "<== " << m->get_source_inst()
+ << " " << m->get_seq()
+ << " ==== " << *m
+ << " ==== " << m->get_payload().length()
+ << "+" << m->get_middle().length()
+ << "+" << m->get_data().length()
+ << " (" << m->get_footer().front_crc << " "
+ << m->get_footer().middle_crc
+ << " " << m->get_footer().data_crc << ")"
+ << " " << m << " con " << m->get_connection()
+ << dendl;
+ uint64_t msize = m->get_dispatch_throttle_size();
+ m->set_dispatch_throttle_size(0); // clear it out, in case we requeue this message.
+ return msize;
+}
+
+void DispatchQueue::post_dispatch(Message *m, uint64_t msize)
+{
+ dispatch_throttle_release(msize);
+ ldout(cct,20) << "done calling dispatch on " << m << dendl;
+}
+
+bool DispatchQueue::can_fast_dispatch(const Message *m) const
+{
+ return msgr->ms_can_fast_dispatch(m);
+}
+
+void DispatchQueue::fast_dispatch(Message *m)
+{
+ uint64_t msize = pre_dispatch(m);
+ msgr->ms_fast_dispatch(m);
+ post_dispatch(m, msize);
+}
+
+void DispatchQueue::fast_preprocess(Message *m)
+{
+ msgr->ms_fast_preprocess(m);
+}
+
+void DispatchQueue::enqueue(Message *m, int priority, uint64_t id)
+{
+
+ Mutex::Locker l(lock);
+ ldout(cct,20) << "queue " << m << " prio " << priority << dendl;
+ add_arrival(m);
+ if (priority >= CEPH_MSG_PRIO_LOW) {
+ mqueue.enqueue_strict(
+ id, priority, QueueItem(m));
+ } else {
+ mqueue.enqueue(
+ id, priority, m->get_cost(), QueueItem(m));
+ }
+ cond.Signal();
+}
+
+void DispatchQueue::local_delivery(Message *m, int priority)
+{
+ m->set_recv_stamp(ceph_clock_now());
+ Mutex::Locker l(local_delivery_lock);
+ if (local_messages.empty())
+ local_delivery_cond.Signal();
+ local_messages.push_back(make_pair(m, priority));
+ return;
+}
+
+void DispatchQueue::run_local_delivery()
+{
+ local_delivery_lock.Lock();
+ while (true) {
+ if (stop_local_delivery)
+ break;
+ if (local_messages.empty()) {
+ local_delivery_cond.Wait(local_delivery_lock);
+ continue;
+ }
+ pair<Message *, int> mp = local_messages.front();
+ local_messages.pop_front();
+ local_delivery_lock.Unlock();
+ Message *m = mp.first;
+ int priority = mp.second;
+ fast_preprocess(m);
+ if (can_fast_dispatch(m)) {
+ fast_dispatch(m);
+ } else {
+ enqueue(m, priority, 0);
+ }
+ local_delivery_lock.Lock();
+ }
+ local_delivery_lock.Unlock();
+}
+
+void DispatchQueue::dispatch_throttle_release(uint64_t msize)
+{
+ if (msize) {
+ ldout(cct,10) << __func__ << " " << msize << " to dispatch throttler "
+ << dispatch_throttler.get_current() << "/"
+ << dispatch_throttler.get_max() << dendl;
+ dispatch_throttler.put(msize);
+ }
+}
+
+/*
+ * This function delivers incoming messages to the Messenger.
+ * Connections with messages are kept in queues; when beginning a message
+ * delivery the highest-priority queue is selected, the connection from the
+ * front of the queue is removed, and its message read. If the connection
+ * has remaining messages at that priority level, it is re-placed on to the
+ * end of the queue. If the queue is empty; it's removed.
+ * The message is then delivered and the process starts again.
+ */
+void DispatchQueue::entry()
+{
+ lock.Lock();
+ while (true) {
+ while (!mqueue.empty()) {
+ QueueItem qitem = mqueue.dequeue();
+ if (!qitem.is_code())
+ remove_arrival(qitem.get_message());
+ lock.Unlock();
+
+ if (qitem.is_code()) {
+ if (cct->_conf->ms_inject_internal_delays &&
+ cct->_conf->ms_inject_delay_probability &&
+ (rand() % 10000)/10000.0 < cct->_conf->ms_inject_delay_probability) {
+ utime_t t;
+ t.set_from_double(cct->_conf->ms_inject_internal_delays);
+ ldout(cct, 1) << "DispatchQueue::entry inject delay of " << t
+ << dendl;
+ t.sleep();
+ }
+ switch (qitem.get_code()) {
+ case D_BAD_REMOTE_RESET:
+ msgr->ms_deliver_handle_remote_reset(qitem.get_connection());
+ break;
+ case D_CONNECT:
+ msgr->ms_deliver_handle_connect(qitem.get_connection());
+ break;
+ case D_ACCEPT:
+ msgr->ms_deliver_handle_accept(qitem.get_connection());
+ break;
+ case D_BAD_RESET:
+ msgr->ms_deliver_handle_reset(qitem.get_connection());
+ break;
+ case D_CONN_REFUSED:
+ msgr->ms_deliver_handle_refused(qitem.get_connection());
+ break;
+ default:
+ ceph_abort();
+ }
+ } else {
+ Message *m = qitem.get_message();
+ if (stop) {
+ ldout(cct,10) << " stop flag set, discarding " << m << " " << *m << dendl;
+ m->put();
+ } else {
+ uint64_t msize = pre_dispatch(m);
+ msgr->ms_deliver_dispatch(m);
+ post_dispatch(m, msize);
+ }
+ }
+
+ lock.Lock();
+ }
+ if (stop)
+ break;
+
+ // wait for something to be put on queue
+ cond.Wait(lock);
+ }
+ lock.Unlock();
+}
+
+void DispatchQueue::discard_queue(uint64_t id) {
+ Mutex::Locker l(lock);
+ list<QueueItem> removed;
+ mqueue.remove_by_class(id, &removed);
+ for (list<QueueItem>::iterator i = removed.begin();
+ i != removed.end();
+ ++i) {
+ assert(!(i->is_code())); // We don't discard id 0, ever!
+ Message *m = i->get_message();
+ remove_arrival(m);
+ dispatch_throttle_release(m->get_dispatch_throttle_size());
+ m->put();
+ }
+}
+
+void DispatchQueue::start()
+{
+ assert(!stop);
+ assert(!dispatch_thread.is_started());
+ dispatch_thread.create("ms_dispatch");
+ local_delivery_thread.create("ms_local");
+}
+
+void DispatchQueue::wait()
+{
+ local_delivery_thread.join();
+ dispatch_thread.join();
+}
+
+void DispatchQueue::discard_local()
+{
+ for (list<pair<Message *, int> >::iterator p = local_messages.begin();
+ p != local_messages.end();
+ ++p) {
+ ldout(cct,20) << __func__ << " " << p->first << dendl;
+ p->first->put();
+ }
+ local_messages.clear();
+}
+
+void DispatchQueue::shutdown()
+{
+ // stop my local delivery thread
+ local_delivery_lock.Lock();
+ stop_local_delivery = true;
+ local_delivery_cond.Signal();
+ local_delivery_lock.Unlock();
+
+ // stop my dispatch thread
+ lock.Lock();
+ stop = true;
+ cond.Signal();
+ lock.Unlock();
+}
Code Review / stor4nfv.git / blobdiff