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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
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# 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
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Thomas Grass
# Andreas Hansson
from m5.params import *
from m5.proxy import *
from MemObject import MemObject
from System import System
# The communication monitor will most typically be used in combination
# with periodic dumping and resetting of stats using schedStatEvent
class CommMonitor(MemObject):
type = 'CommMonitor'
cxx_header = "mem/comm_monitor.hh"
system = Param.System(Parent.any, "System that the monitor belongs to.")
# one port in each direction
master = MasterPort("Master port")
slave = SlavePort("Slave port")
# packet trace output file, disabled by default
trace_file = Param.String("", "Packet trace output file")
# 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")
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