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# Copyright (c) 2012 ARM Limited
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# Authors: Thomas Grass
# Andreas Hansson
from m5.params import *
from MemObject import MemObject
# 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"
# 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")