72 lines
2.9 KiB
Python
72 lines
2.9 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2006 Alon Zakai ('Kripken') <kripkensteiner@gmail.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, write to:
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# The Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor
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# Boston, MA 02110-1301, USA.
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#
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# In addition, as a special exception, the copyright holders give
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# permission to link the code of portions of this program with the OpenSSL
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# library.
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# You must obey the GNU General Public License in all respects for all of
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# the code used other than OpenSSL. If you modify file(s) with this
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# exception, you may extend this exception to your version of the file(s),
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# but you are not obligated to do so. If you do not wish to do so, delete
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# this exception statement from your version. If you delete this exception
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# statement from all source files in the program, then also delete it here.
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import time
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# Global variables. Caching of saved data, mostly
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old_peer_info = None
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old_peer_info_timestamp = None
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# Swarm speed - try to guess the speed of the entire swarm
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# We return #pieces / second. The calling function should convert pieces to KB, if it wants
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# Note that we return the delta from the last call. If the client calls too soon, this may
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# be too unreliable. But the client can smooth things out, if desired
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def calc_swarm_speed(peer_info):
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if old_peer_info is not None:
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new_pieces = 0
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peers_known = 0
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# List new peers
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new_peer_IPs = {} # ip->peerinfo dict (from the core)
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for peer in peer_info:
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new_peer_IPs[peer['ip']] = peer
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for new_IP in new_peer_IPs.keys():
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if new_IP in old_peer_IPs.keys():
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# We know this peer from before, see what changed
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peers_known = peers_known + 1
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delta = sum(new_peer_IPs[new_IP].pieces) - sum(old_peer_IPs[new_IP].pieces)
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if delta >= 0:
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new_pieces = new_pieces + delta
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else:
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print "Deluge.stat.calc_swarm_speed: Bad Delta: ", delta, old_peer_IPs[new_IP].pieces, new_peer_IPs[new_IP].pieces
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# Calculate final value
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time_delta = time.time() - old_peer_info_timestamp
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ret = float(new_pieces)/( float(peers_known) * time_delta )
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# Save info
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old_peer_info = peer_info
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old_peer_info_timestamp = time.time()
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old_peer_IPs = new_peer_IPs
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return ret
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