ticks.py (12563:8d59ed22ae79) ticks.py (13409:071d5425ce37)
1# Copyright (c) 2007 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

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26#
27# Authors: Nathan Binkert
28
29from __future__ import print_function
30
31import sys
32from m5.util import warn
33
1# Copyright (c) 2007 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

--- 17 unchanged lines hidden (view full) ---

26#
27# Authors: Nathan Binkert
28
29from __future__ import print_function
30
31import sys
32from m5.util import warn
33
34tps = 1.0e12 # default to 1 THz (1 Tick == 1 ps)
35tps_fixed = False # once set to true, can't be changed
36
37# fix the global frequency and tell C++ about it
34# fix the global frequency
38def fixGlobalFrequency():
39 import _m5.core
35def fixGlobalFrequency():
36 import _m5.core
40 global tps, tps_fixed
41 if not tps_fixed:
42 tps_fixed = True
43 _m5.core.setClockFrequency(int(tps))
44 print("Global frequency set at %d ticks per second" % int(tps))
37 _m5.core.fixClockFrequency()
45
46def setGlobalFrequency(ticksPerSecond):
47 from m5.util import convert
38
39def setGlobalFrequency(ticksPerSecond):
40 from m5.util import convert
41 import _m5.core
48
42
49 global tps, tps_fixed
50
51 if tps_fixed:
52 raise AttributeError, \
53 "Global frequency already fixed at %f ticks/s." % tps
54
55 if isinstance(ticksPerSecond, (int, long)):
56 tps = ticksPerSecond
57 elif isinstance(ticksPerSecond, float):
58 tps = ticksPerSecond
59 elif isinstance(ticksPerSecond, str):
60 tps = round(convert.anyToFrequency(ticksPerSecond))
61 else:
62 raise TypeError, \
63 "wrong type '%s' for ticksPerSecond" % type(ticksPerSecond)
43 if isinstance(ticksPerSecond, (int, long)):
44 tps = ticksPerSecond
45 elif isinstance(ticksPerSecond, float):
46 tps = ticksPerSecond
47 elif isinstance(ticksPerSecond, str):
48 tps = round(convert.anyToFrequency(ticksPerSecond))
49 else:
50 raise TypeError, \
51 "wrong type '%s' for ticksPerSecond" % type(ticksPerSecond)
52 _m5.core.setClockFrequency(tps)
64
65# how big does a rounding error need to be before we warn about it?
66frequency_tolerance = 0.001 # 0.1%
67
68def fromSeconds(value):
53
54# how big does a rounding error need to be before we warn about it?
55frequency_tolerance = 0.001 # 0.1%
56
57def fromSeconds(value):
58 import _m5.core
59
69 if not isinstance(value, float):
70 raise TypeError, "can't convert '%s' to type tick" % type(value)
71
72 # once someone needs to convert to seconds, the global frequency
73 # had better be fixed
60 if not isinstance(value, float):
61 raise TypeError, "can't convert '%s' to type tick" % type(value)
62
63 # once someone needs to convert to seconds, the global frequency
64 # had better be fixed
74 if not tps_fixed:
65 if not _m5.core.clockFrequencyFixed():
75 raise AttributeError, \
76 "In order to do conversions, the global frequency must be fixed"
77
78 if value == 0:
79 return 0
80
81 # convert the value from time to ticks
66 raise AttributeError, \
67 "In order to do conversions, the global frequency must be fixed"
68
69 if value == 0:
70 return 0
71
72 # convert the value from time to ticks
82 value *= tps
73 value *= _m5.core.getClockFrequency()
83
84 int_value = int(round(value))
85 err = (value - int_value) / value
86 if err > frequency_tolerance:
87 warn("rounding error > tolerance\n %f rounded to %d", value,
88 int_value)
89 return int_value
90
91__all__ = [ 'setGlobalFrequency', 'fixGlobalFrequency', 'fromSeconds',
92 'frequency_tolerance' ]
74
75 int_value = int(round(value))
76 err = (value - int_value) / value
77 if err > frequency_tolerance:
78 warn("rounding error > tolerance\n %f rounded to %d", value,
79 int_value)
80 return int_value
81
82__all__ = [ 'setGlobalFrequency', 'fixGlobalFrequency', 'fromSeconds',
83 'frequency_tolerance' ]