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# Copyright (c) 2012 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder. You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
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# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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from m5.params import *
from m5.proxy import *
from m5.objects.System import System
from m5.SimObject import SimObject
# The communication monitor will most typically be used in combination
# with periodic dumping and resetting of stats using schedStatEvent
class CommMonitor(SimObject):
type = "CommMonitor"
cxx_header = "mem/comm_monitor.hh"
cxx_class = "gem5::CommMonitor"
system = Param.System(Parent.any, "System that the monitor belongs to.")
# one port in each direction
mem_side_port = RequestPort(
"This port sends requests and receives responses"
)
master = DeprecatedParam(
mem_side_port, "`master` is now called `mem_side_port`"
)
cpu_side_port = ResponsePort(
"This port receives requests and sends responses"
)
slave = DeprecatedParam(
cpu_side_port, "`slave` is now called `cpu_side_port`"
)
# control the sample period window length of this monitor
sample_period = Param.Clock("1ms", "Sample period for histograms")
# for each histogram, set the number of bins and enable the user
# to disable the measurement, reads and writes use the same
# parameters
# histogram of burst length of packets (not using sample period)
burst_length_bins = Param.Unsigned(
"20", "# bins in burst length histograms"
)
disable_burst_length_hists = Param.Bool(
False, "Disable burst length histograms"
)
# bandwidth per sample period
bandwidth_bins = Param.Unsigned("20", "# bins in bandwidth histograms")
disable_bandwidth_hists = Param.Bool(False, "Disable bandwidth histograms")
# latency from request to response (not using sample period)
latency_bins = Param.Unsigned("20", "# bins in latency histograms")
disable_latency_hists = Param.Bool(False, "Disable latency histograms")
# inter transaction time (ITT) distributions in uniformly sized
# bins up to the maximum, independently for read-to-read,
# write-to-write and the combined request-to-request that does not
# separate read and write requests
itt_bins = Param.Unsigned("20", "# bins in ITT distributions")
itt_max_bin = Param.Latency("100ns", "Max bin of ITT distributions")
disable_itt_dists = Param.Bool(False, "Disable ITT distributions")
# outstanding requests (that did not yet get a response) per
# sample period
outstanding_bins = Param.Unsigned(
"20", "# bins in outstanding requests histograms"
)
disable_outstanding_hists = Param.Bool(
False, "Disable outstanding requests histograms"
)
# transactions (requests) observed per sample period
transaction_bins = Param.Unsigned(
"20", "# bins in transaction count histograms"
)
disable_transaction_hists = Param.Bool(
False, "Disable transaction count histograms"
)
# address distributions (heatmaps) with associated address masks
# to selectively only look at certain bits of the address
read_addr_mask = Param.Addr(MaxAddr, "Address mask for read address")
write_addr_mask = Param.Addr(MaxAddr, "Address mask for write address")
disable_addr_dists = Param.Bool(True, "Disable address distributions")