added stats_alert reporting raw transfer stats per torrent every second

bindings/python/src/alert.cpp

@@ -406,5 +406,24 @@ void bind_alert()
     ;
 
 
+    class_<stats_alert, bases<torrent_alert>, noncopyable>(
+        "stats_alert", no_init
+    )
+        .def_readonly("transferred", &stats_alert::transferred)
+        .def_readonly("interval", &stats_alert::interval)
+        ;
+
+    enum_<stats_alert::stats_channel>("stats_channel")
+        .value("upload_payload", stats_alert::upload_payload)
+        .value("upload_protocol", stats_alert::upload_protocol)
+        .value("upload_ip_protocol", stats_alert::upload_ip_protocol)
+        .value("upload_dht_protocol", stats_alert::upload_dht_protocol)
+        .value("upload_tracker_protocol", stats_alert::upload_tracker_protocol)
+        .value("download_payload", stats_alert::download_payload)
+        .value("download_protocol", stats_alert::download_protocol)
+        .value("download_ip_protocol", stats_alert::download_ip_protocol)
+        .value("download_dht_protocol", stats_alert::download_dht_protocol)
+        .value("download_tracker_protocol", stats_alert::download_tracker_protocol)
+    ;
 
 }

docs/manual.rst

@@ -4748,6 +4748,11 @@ is a bitmask with the following bits:
 | ``performance_warning``        | Alerts when some limit is reached that might limit the download     |
 |                                | or upload rate.                                                     |
 +--------------------------------+---------------------------------------------------------------------+
+| ``stats_notification``         | If you enable these alerts, you will receive a ``stats_alert``      |
+|                                | approximately once every second, for every active torrent.          |
+|                                | These alerts contain all statistics counters for the interval since |
+|                                | the lasts stats alert.                                              |
++--------------------------------+---------------------------------------------------------------------+
 | ``all_categories``             | The full bitmask, representing all available categories.            |
 +--------------------------------+---------------------------------------------------------------------+
 
@@ -5646,6 +5651,45 @@ generating the resume data. ``error`` describes what went wrong.
 		error_code error;
 	};
 
+stats_alert
+-----------
+
+This alert is posted approximately once every second, and it contains
+byte counters of most statistics that's tracked for torrents. Each active
+torrent posts these alerts regularly.
+
+::
+
+	struct stats_alert: torrent_alert
+	{
+		// ...
+		enum stats_channel
+		{
+			upload_payload,
+			upload_protocol,
+			upload_ip_protocol,
+			upload_dht_protocol,
+			upload_tracker_protocol,
+			download_payload,
+			download_protocol,
+			download_ip_protocol,
+			download_dht_protocol,
+			download_tracker_protocol,
+			num_channels
+		};
+
+		int transferred[num_channels];
+		int interval;
+	};
+
+``transferred`` this is an array of samples. The enum describes what each
+sample is a measurement of. All of these are raw, and not smoothing is performed.
+
+``interval`` the number of milliseconds during which these stats
+were collected. This is typically just above 1000, but if CPU is
+limited, it may be higher than that.
+
+
 dht_announce_alert
 ------------------
 

include/libtorrent/alert.hpp

@@ -86,6 +86,7 @@ namespace libtorrent {
 			ip_block_notification = 0x100,
 			performance_warning = 0x200,
 			dht_notification = 0x400,
+			stats_notification = 0x800,
 
 			all_categories = 0xffffffff
 		};

include/libtorrent/alert_types.hpp

@@ -40,6 +40,16 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/assert.hpp"
 #include "libtorrent/identify_client.hpp"
 #include "libtorrent/address.hpp"
+#include "libtorrent/stat.hpp"
+
+// lines reserved for future includes
+// the type-ids of the alert types
+// are derived from the line on which
+// they are declared
+
+
+
+
 
 namespace libtorrent
 {
@@ -1078,6 +1088,36 @@ namespace libtorrent
 
 		sha1_hash info_hash;
 	};
+
+	struct TORRENT_EXPORT stats_alert: torrent_alert
+	{
+		stats_alert(torrent_handle const& h, int interval
+			, stat const& s);
+
+		TORRENT_DEFINE_ALERT(stats_alert);
+
+		const static int static_category = alert::stats_notification;
+		virtual std::string message() const;
+
+		enum stats_channel
+		{
+			upload_payload,
+			upload_protocol,
+			upload_ip_protocol,
+			upload_dht_protocol,
+			upload_tracker_protocol,
+			download_payload,
+			download_protocol,
+			download_ip_protocol,
+			download_dht_protocol,
+			download_tracker_protocol,
+			num_channels
+		};
+
+		int transferred[num_channels];
+		int interval;
+	};
+
 }
 
 

include/libtorrent/stat.hpp

@@ -52,13 +52,16 @@ namespace libtorrent
 		enum { history = 10 };
 
 		stat_channel()
-			: m_counter(0)
+			: m_window(3)
+			, m_counter(0)
 			, m_total_counter(0)
 			, m_rate_sum(0)
 		{
 			std::memset(m_rate_history, 0, sizeof(m_rate_history));
 		}
 
+		void set_window(int w);
+
 		void operator+=(stat_channel const& s)
 		{
 			TORRENT_ASSERT(m_counter >= 0);
@@ -82,7 +85,7 @@ namespace libtorrent
 
 		// should be called once every second
 		void second_tick(int tick_interval_ms);
-		int rate() const { return int(m_rate_sum / history); }
+		int rate() const { return int(m_rate_sum / m_window); }
 		size_type rate_sum() const { return m_rate_sum; }
 		size_type total() const { return m_total_counter; }
 
@@ -104,13 +107,15 @@ namespace libtorrent
 			m_rate_sum = 0;
 		}
 
+		int window() const { return m_window; }
+
 	private:
 
 #ifdef TORRENT_DEBUG
 		void check_invariant() const
 		{
 			size_type sum = 0;
-			for (int i = 0; i < history; ++i) sum += m_rate_history[i];
+			for (int i = 0; i < m_window; ++i) sum += m_rate_history[i];
 			TORRENT_ASSERT(m_rate_sum == sum);
 			TORRENT_ASSERT(m_total_counter >= 0);
 		}
@@ -119,6 +124,9 @@ namespace libtorrent
 		// history of rates a few seconds back
 		int m_rate_history[history];
 
+		// averaging window (seconds). 'history' is the max size
+		int m_window;
+
 		// the accumulator for this second.
 		int m_counter;
 
@@ -216,6 +224,12 @@ namespace libtorrent
 		int download_tracker() const { return m_stat[download_tracker_protocol].counter(); }
 		int upload_tracker() const { return m_stat[upload_tracker_protocol].counter(); }
 
+		void set_window(int w)
+		{
+			for (int i = 0; i < num_channels; ++i)
+				m_stat[i].set_window(w);
+		}
+
 		// should be called once every second
 		void second_tick(int tick_interval_ms)
 		{
@@ -229,7 +243,7 @@ namespace libtorrent
 				+ m_stat[upload_protocol].rate_sum()
 				+ m_stat[upload_ip_protocol].rate_sum()
 				+ m_stat[upload_dht_protocol].rate_sum())
-				/ stat_channel::history);
+				/ m_stat[0].window());
 		}
 
 		int download_rate() const
@@ -238,7 +252,7 @@ namespace libtorrent
 				+ m_stat[download_protocol].rate_sum()
 				+ m_stat[download_ip_protocol].rate_sum()
 				+ m_stat[download_dht_protocol].rate_sum())
-				/ stat_channel::history);
+				/ m_stat[0].window());
 		}
 
 		size_type total_upload() const
@@ -319,6 +333,12 @@ namespace libtorrent
 				m_stat[i].clear();
 		}
 
+		stat_channel const& operator[](int i) const
+		{
+			TORRENT_ASSERT(i >= 0 && i < num_channels);
+			return m_stat[i];
+		}
+
 	private:
 
 		stat_channel m_stat[num_channels];

src/alert.cpp

@@ -433,5 +433,33 @@ namespace libtorrent {
 		return queue_size_limit_;
 	}
 
+	stats_alert::stats_alert(torrent_handle const& h, int in
+		, stat const& s)
+		: torrent_alert(h)
+		, interval(in)
+	{
+		for (int i = 0; i < num_channels; ++i)
+			transferred[i] = s[i].counter();
+	}
+
+	std::string stats_alert::message() const
+	{
+		char msg[200];
+		snprintf(msg, sizeof(msg), "%s: [%d] %d %d %d %d %d %d %d %d %d %d"
+			, torrent_alert::message().c_str()
+			, interval
+			, transferred[0]
+			, transferred[1]
+			, transferred[2]
+			, transferred[3]
+			, transferred[4]
+			, transferred[5]
+			, transferred[6]
+			, transferred[7]
+			, transferred[8]
+			, transferred[9]);
+		return msg;
+	}
+
 } // namespace libtorrent
 

src/stat.cpp

@@ -30,11 +30,6 @@ POSSIBILITY OF SUCH DAMAGE.
 
 */
 
-// TODO: Use two algorithms to estimate transfer rate.
-// one (simple) for transfer rates that are >= 1 packet
-// per second and one (low pass-filter) for rates < 1
-// packet per second.
-
 #include "libtorrent/pch.hpp"
 
 #include <numeric>
@@ -43,14 +38,13 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/stat.hpp"
 #include "libtorrent/invariant_check.hpp"
 
-namespace libtorrent
+namespace libtorrent {
-{
 
 void stat_channel::second_tick(int tick_interval_ms)
 {
 	INVARIANT_CHECK;
 
-	m_rate_sum -= m_rate_history[history-1];
+	m_rate_sum -= m_rate_history[m_window-1];
 
 	for (int i = history - 2; i >= 0; --i)
 		m_rate_history[i + 1] = m_rate_history[i];
@@ -61,6 +55,16 @@ void stat_channel::second_tick(int tick_interval_ms)
 	m_counter = 0;
 }
 
+void stat_channel::set_window(int w)
+{
+	if (w < 1) w = 1;
+	else if (w > history) w = history;
+	m_window = w;
+	m_rate_sum = 0;
+	for (int i = 0; i < m_window; ++i)
+		m_rate_sum += m_rate_history[i];
+
+}
 
 }
 

src/torrent.cpp

@@ -5456,6 +5456,9 @@ namespace libtorrent
 			}
 #endif
 		}
+		if (m_ses.m_alerts.should_post<stats_alert>())
+			m_ses.m_alerts.post_alert(stats_alert(get_handle(), tick_interval_ms, m_stat));
+
 		accumulator += m_stat;
 		m_total_uploaded += m_stat.last_payload_uploaded();
 		m_total_downloaded += m_stat.last_payload_downloaded();