2 This file is part of GNUnet.
3 Copyright (C) 2011-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
22 * @file util/speedup.c
23 * @author Matthias Wachs
24 * @brief functions to speedup peer execution by manipulation system time
27 #include "gnunet_util_lib.h"
30 #define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
33 static struct GNUNET_TIME_Relative interval;
35 static struct GNUNET_TIME_Relative delta;
37 static struct GNUNET_SCHEDULER_Task * speedup_task;
41 do_speedup (void *cls,
42 const struct GNUNET_SCHEDULER_TaskContext *tc)
44 static long long current_offset;
47 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
49 current_offset += delta.rel_value_us;
50 GNUNET_TIME_set_offset (current_offset);
51 LOG (GNUNET_ERROR_TYPE_DEBUG,
52 "Speeding up execution time by %s\n",
53 GNUNET_STRINGS_relative_time_to_string (delta, GNUNET_NO));
54 speedup_task = GNUNET_SCHEDULER_add_delayed (interval, &do_speedup, NULL);
59 * Start task that may speed up our system clock artificially
61 * @param cfg configuration to use
62 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the speedup was not configured
65 GNUNET_SPEEDUP_start_ (const struct GNUNET_CONFIGURATION_Handle *cfg)
68 GNUNET_CONFIGURATION_get_value_time (cfg, "testing",
69 "SPEEDUP_INTERVAL", &interval))
72 GNUNET_CONFIGURATION_get_value_time (cfg, "testing",
73 "SPEEDUP_DELTA", &delta))
76 if ((0 == interval.rel_value_us) || (0 == delta.rel_value_us))
78 LOG (GNUNET_ERROR_TYPE_DEBUG,
79 "Speed up disabled\n");
82 LOG (GNUNET_ERROR_TYPE_DEBUG,
83 "Speed up execution by %s\n",
84 GNUNET_STRINGS_relative_time_to_string (delta, GNUNET_NO));
85 LOG (GNUNET_ERROR_TYPE_DEBUG,
86 "Speed up executed every %s\n",
87 GNUNET_STRINGS_relative_time_to_string (interval, GNUNET_NO));
88 speedup_task = GNUNET_SCHEDULER_add_now_with_lifeness (GNUNET_NO,
95 * Stop tasks that modify clock behavior.
98 GNUNET_SPEEDUP_stop_ ()
100 if (NULL != speedup_task)
102 GNUNET_SCHEDULER_cancel (speedup_task);
105 if ( (0 != interval.rel_value_us) &&
106 (0 != delta.rel_value_us) )
107 LOG (GNUNET_ERROR_TYPE_DEBUG,
108 "Stopped execution speed up\n");
113 /* end of speedup.c */