diff options
Diffstat (limited to 'src/python/m5/params.py')
| -rw-r--r-- | src/python/m5/params.py | 130 |
1 files changed, 62 insertions, 68 deletions
diff --git a/src/python/m5/params.py b/src/python/m5/params.py index e71e1c3c5..7c60a8554 100644 --- a/src/python/m5/params.py +++ b/src/python/m5/params.py @@ -51,6 +51,7 @@ import sys import time import convert +import ticks from util import * # Dummy base class to identify types that are legitimate for SimObject @@ -632,47 +633,29 @@ class Enum(ParamValue): def __str__(self): return self.value -ticks_per_sec = None - # how big does a rounding error need to be before we warn about it? frequency_tolerance = 0.001 # 0.1% -# convert a floting-point # of ticks to integer, and warn if rounding -# discards too much precision -def tick_check(float_ticks): - if float_ticks == 0: - return 0 - int_ticks = int(round(float_ticks)) - err = (float_ticks - int_ticks) / float_ticks - if err > frequency_tolerance: - print >> sys.stderr, "Warning: rounding error > tolerance" - print >> sys.stderr, " %f rounded to %d" % (float_ticks, int_ticks) - #raise ValueError - return int_ticks - -def getLatency(value): - if isinstance(value, Latency) or isinstance(value, Clock): - return value.value - elif isinstance(value, Frequency) or isinstance(value, RootClock): - return 1 / value.value - elif isinstance(value, str): - try: - return convert.toLatency(value) - except ValueError: - try: - return 1 / convert.toFrequency(value) - except ValueError: - pass # fall through - raise ValueError, "Invalid Frequency/Latency value '%s'" % value - - -class Latency(NumericParamValue): +class TickParamValue(NumericParamValue): cxx_type = 'Tick' cxx_predecls = ['#include "sim/host.hh"'] swig_predecls = ['%import "python/m5/swig/stdint.i"\n' + '%import "sim/host.hh"'] + +class Latency(TickParamValue): def __init__(self, value): - self.value = getLatency(value) + if isinstance(value, (Latency, Clock)): + self.ticks = value.ticks + self.value = value.value + elif isinstance(value, Frequency): + self.ticks = value.ticks + self.value = 1.0 / value.value + elif value.endswith('t'): + self.ticks = True + self.value = int(value[:-1]) + else: + self.ticks = False + self.value = convert.toLatency(value) def __getattr__(self, attr): if attr in ('latency', 'period'): @@ -683,15 +666,25 @@ class Latency(NumericParamValue): # convert latency to ticks def ini_str(self): - return str(tick_check(self.value * ticks_per_sec)) + if self.ticks or self.value == 0: + return '%d' % self.value + else: + return '%d' % (ticks.fromSeconds(self.value)) -class Frequency(NumericParamValue): - cxx_type = 'Tick' - cxx_predecls = ['#include "sim/host.hh"'] - swig_predecls = ['%import "python/m5/swig/stdint.i"\n' + - '%import "sim/host.hh"'] +class Frequency(TickParamValue): def __init__(self, value): - self.value = 1 / getLatency(value) + if isinstance(value, (Latency, Clock)): + if value.value == 0: + self.value = 0 + else: + self.value = 1.0 / value.value + self.ticks = value.ticks + elif isinstance(value, Frequency): + self.value = value.value + self.ticks = value.ticks + else: + self.ticks = False + self.value = convert.toFrequency(value) def __getattr__(self, attr): if attr == 'frequency': @@ -700,30 +693,12 @@ class Frequency(NumericParamValue): return Latency(self) raise AttributeError, "Frequency object has no attribute '%s'" % attr - # convert frequency to ticks per period - def ini_str(self): - return self.period.ini_str() - -# Just like Frequency, except ini_str() is absolute # of ticks per sec (Hz). -# We can't inherit from Frequency because we don't want it to be directly -# assignable to a regular Frequency parameter. -class RootClock(ParamValue): - cxx_type = 'Tick' - cxx_predecls = ['#include "sim/host.hh"'] - swig_predecls = ['%import "python/m5/swig/stdint.i"\n' + - '%import "sim/host.hh"'] - def __init__(self, value): - self.value = 1 / getLatency(value) - - def __getattr__(self, attr): - if attr == 'frequency': - return Frequency(self) - if attr in ('latency', 'period'): - return Latency(self) - raise AttributeError, "Frequency object has no attribute '%s'" % attr - + # convert latency to ticks def ini_str(self): - return str(tick_check(self.value)) + if self.ticks or self.value == 0: + return '%d' % self.value + else: + return '%d' % (ticks.fromSeconds(1.0 / self.value)) # A generic frequency and/or Latency value. Value is stored as a latency, # but to avoid ambiguity this object does not support numeric ops (* or /). @@ -734,7 +709,18 @@ class Clock(ParamValue): swig_predecls = ['%import "python/m5/swig/stdint.i"\n' + '%import "sim/host.hh"'] def __init__(self, value): - self.value = getLatency(value) + if isinstance(value, (Latency, Clock)): + self.ticks = value.ticks + self.value = value.value + elif isinstance(value, Frequency): + self.ticks = value.ticks + self.value = 1.0 / value.value + elif value.endswith('t'): + self.ticks = True + self.value = int(value[:-1]) + else: + self.ticks = False + self.value = convert.anyToLatency(value) def __getattr__(self, attr): if attr == 'frequency': @@ -749,18 +735,23 @@ class Clock(ParamValue): class NetworkBandwidth(float,ParamValue): cxx_type = 'float' def __new__(cls, value): - val = convert.toNetworkBandwidth(value) / 8.0 + # convert to bits per second + val = convert.toNetworkBandwidth(value) return super(cls, NetworkBandwidth).__new__(cls, val) def __str__(self): return str(self.val) def ini_str(self): - return '%f' % (ticks_per_sec / float(self)) + # convert to seconds per byte + value = 8.0 / float(self) + # convert to ticks per byte + return '%f' % (ticks.fromSeconds(value)) class MemoryBandwidth(float,ParamValue): cxx_type = 'float' def __new__(self, value): + # we want the number of ticks per byte of data val = convert.toMemoryBandwidth(value) return super(cls, MemoryBandwidth).__new__(cls, val) @@ -768,7 +759,10 @@ class MemoryBandwidth(float,ParamValue): return str(self.val) def ini_str(self): - return '%f' % (ticks_per_sec / float(self)) + # convert to seconds per byte + value = 1.0 / float(self) + # convert to ticks per byte + return '%f' % (ticks.fromSeconds(value)) # # "Constants"... handy aliases for various values. @@ -1023,7 +1017,7 @@ __all__ = ['Param', 'VectorParam', 'Counter', 'Addr', 'Tick', 'Percent', 'TcpPort', 'UdpPort', 'EthernetAddr', 'MemorySize', 'MemorySize32', - 'Latency', 'Frequency', 'RootClock', 'Clock', + 'Latency', 'Frequency', 'Clock', 'NetworkBandwidth', 'MemoryBandwidth', 'Range', 'AddrRange', 'TickRange', 'MaxAddr', 'MaxTick', 'AllMemory', |