mirror of https://github.com/BOINC/boinc.git
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
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// The contents of this file are subject to the Mozilla Public License
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// Version 1.0 (the "License"); you may not use this file except in
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// compliance with the License. You may obtain a copy of the License at
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// http://www.mozilla.org/MPL/
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//
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// Software distributed under the License is distributed on an "AS IS"
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// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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// License for the specific language governing rights and limitations
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// under the License.
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//
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// The Original Code is the Berkeley Open Infrastructure for Network Computing.
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//
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// The Initial Developer of the Original Code is the SETI@home project.
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// Portions created by the SETI@home project are Copyright (C) 2002
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// University of California at Berkeley. All Rights Reserved.
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//
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// Contributor(s):
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//
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#ifndef _SCHED_UTIL_
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#define _SCHED_UTIL_
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#include <math.h>
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// "average credit" uses an exponential decay so that recent
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// activity is weighted more heavily.
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// H is the "half-life" period: the average goes down by 1/2
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// if idle for this period.
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// Specifically, the weighting function W(t) is
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// W(t) = exp(t/(H*log(2))*H*log(2).
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// The average credit is the sum of X*W(t(X))
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// over units of credit X that were granted t(X) time ago.
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#define LOG2 M_LN2
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// log(2)
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#define SECONDS_IN_DAY (3600*24)
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#define AVG_HALF_LIFE (SECONDS_IN_DAY*7)
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#define ALPHA (LOG2/AVG_HALF_LIFE)
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#define STOP_TRIGGER_FILENAME "stop_server"
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extern void write_log(char*);
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extern void check_stop_trigger();
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extern void update_average(double, double, double&, double&);
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#endif
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