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#!/usr/bin/env python
# Copyright (c) 2013-2014 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: Andreas Hansson
# This script is used to dump protobuf packet traces to ASCII
# format. It assumes that protoc has been executed and already
# generated the Python package for the packet messages. This can
# be done manually using:
# protoc --python_out=. --proto_path=src/proto src/proto/packet.proto
#
# The ASCII trace format uses one line per request on the format cmd,
# addr, size, tick,flags. For example:
# r,128,64,4000,0
# w,232123,64,500000,0
import gzip
import protolib
import sys
# Import the packet proto definitions. If they are not found, attempt
# to generate them automatically. This assumes that the script is
# executed from the gem5 root.
try:
import packet_pb2
except:
print "Did not find packet proto definitions, attempting to generate"
from subprocess import call
error = call(['protoc', '--python_out=util', '--proto_path=src/proto',
'src/proto/packet.proto'])
if not error:
print "Generated packet proto definitions"
try:
import google.protobuf
except:
print "Please install Python protobuf module"
exit(-1)
import packet_pb2
else:
print "Failed to import packet proto definitions"
exit(-1)
def main():
if len(sys.argv) != 3:
print "Usage: ", sys.argv[0], " <protobuf input> <ASCII output>"
exit(-1)
try:
# First see if this file is gzipped
try:
# Opening the file works even if it is not a gzip file
proto_in = gzip.open(sys.argv[1], 'rb')
# Force a check of the magic number by seeking in the
# file. If we do not do it here the error will occur when
# reading the first message.
proto_in.seek(1)
proto_in.seek(0)
except IOError:
proto_in = open(sys.argv[1], 'rb')
except IOError:
print "Failed to open ", sys.argv[1], " for reading"
exit(-1)
try:
ascii_out = open(sys.argv[2], 'w')
except IOError:
print "Failed to open ", sys.argv[2], " for writing"
exit(-1)
# Read the magic number in 4-byte Little Endian
magic_number = proto_in.read(4)
if magic_number != "gem5":
print "Unrecognized file", sys.argv[1]
exit(-1)
print "Parsing packet header"
# Add the packet header
header = packet_pb2.PacketHeader()
protolib.decodeMessage(proto_in, header)
print "Object id:", header.obj_id
print "Tick frequency:", header.tick_freq
print "Parsing packets"
num_packets = 0
packet = packet_pb2.Packet()
# Decode the packet messages until we hit the end of the file
while protolib.decodeMessage(proto_in, packet):
num_packets += 1
# ReadReq is 1 and WriteReq is 4 in src/mem/packet.hh Command enum
cmd = 'r' if packet.cmd == 1 else ('w' if packet.cmd == 4 else 'u')
if packet.HasField('pkt_id'):
ascii_out.write('%s,' % (packet.pkt_id))
if packet.HasField('flags'):
ascii_out.write('%s,%s,%s,%s,%s\n' % (cmd, packet.addr, packet.size,
packet.flags, packet.tick))
else:
ascii_out.write('%s,%s,%s,%s\n' % (cmd, packet.addr, packet.size,
packet.tick))
print "Parsed packets:", num_packets
# We're done
ascii_out.close()
proto_in.close()
if __name__ == "__main__":
main()
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