From d0f2b0ade0972c461446078b193bb5a88bd507de Mon Sep 17 00:00:00 2001
From: Arvid Norberg <arvid@libtorrent.org>
Date: Mon, 3 May 2010 08:54:03 +0000
Subject: [PATCH] make tick interval configurable

---
 docs/manual.rst                         | 7 +++++++
 include/libtorrent/session_settings.hpp | 5 +++++
 src/session_impl.cpp                    | 5 +++--
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/docs/manual.rst b/docs/manual.rst
index 005403f05..12b52d4fe 100644
--- a/docs/manual.rst
+++ b/docs/manual.rst
@@ -3896,6 +3896,7 @@ session_settings
 		bool broadcast_lsd;
 		bool ignore_resume_timestamps;
 		bool anonymous_mode;
+		int tick_interval;
 	};
 
 ``user_agent`` this is the client identification to the tracker.
@@ -4548,6 +4549,12 @@ when this setting is enabled.
 
 If you're using I2P, it might make sense to enable anonymous mode as well.
 
+``tick_interval`` specifies the number of milliseconds between internal
+ticks. This is the frequency with which bandwidth quota is distributed to
+peers. It should not be more than one second (i.e. 1000 ms). Setting this
+to a low value (around 100) means higher resolution bandwidth quota distribution,
+setting it to a higher value saves CPU cycles.
+
 pe_settings
 ===========
 
diff --git a/include/libtorrent/session_settings.hpp b/include/libtorrent/session_settings.hpp
index 3c4e56107..6fcf193b8 100644
--- a/include/libtorrent/session_settings.hpp
+++ b/include/libtorrent/session_settings.hpp
@@ -213,6 +213,7 @@ namespace libtorrent
 			, broadcast_lsd(false)
 			, ignore_resume_timestamps(false)
 			, anonymous_mode(false)
+			, tick_interval(100)
 		{}
 
 		// this is the user agent that will be sent to the tracker
@@ -824,6 +825,10 @@ namespace libtorrent
 		// mode is assumed to be combined with using a proxy for all your
 		// traffic. With this option, your true IP address will not be exposed
 		bool anonymous_mode;
+
+		// the number of milliseconds between internal ticks. Should be no
+		// more than one second (i.e. 1000).
+		int tick_interval;
 	};
 
 #ifndef TORRENT_DISABLE_DHT
diff --git a/src/session_impl.cpp b/src/session_impl.cpp
index 229513571..d806f9a06 100644
--- a/src/session_impl.cpp
+++ b/src/session_impl.cpp
@@ -318,6 +318,7 @@ namespace aux {
 		TORRENT_SETTING(boolean, broadcast_lsd)
 		TORRENT_SETTING(boolean, ignore_resume_timestamps)
 		TORRENT_SETTING(boolean, anonymous_mode)
+		TORRENT_SETTING(integer, tick_interval)
 	};
 
 #undef TORRENT_SETTING
@@ -722,7 +723,7 @@ namespace aux {
 
 		url_random((char*)&m_peer_id[print.length()], (char*)&m_peer_id[0] + 20);
 
-		m_timer.expires_from_now(milliseconds(100), ec);
+		m_timer.expires_from_now(milliseconds(m_settings.tick_interval), ec);
 		m_timer.async_wait(boost::bind(&session_impl::on_tick, this, _1));
 
 		int delay = (std::max)(m_settings.local_service_announce_interval
@@ -1903,7 +1904,7 @@ namespace aux {
 		}
 
 		error_code ec;
-		m_timer.expires_at(now + milliseconds(100), ec);
+		m_timer.expires_at(now + milliseconds(m_settings.tick_interval), ec);
 		m_timer.async_wait(bind(&session_impl::on_tick, this, _1));
 
 		m_download_rate.update_quotas(now - m_last_tick);