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Diffstat (limited to 'util/decode_packet_trace.py')
| -rwxr-xr-x | util/decode_packet_trace.py | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/util/decode_packet_trace.py b/util/decode_packet_trace.py new file mode 100755 index 000000000..9ee877e39 --- /dev/null +++ b/util/decode_packet_trace.py @@ -0,0 +1,189 @@ +#!/usr/bin/env python + +# Copyright (c) 2013 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. +# +# Copyright 2008 Google Inc. All rights reserved. +# http://code.google.com/p/protobuf/ +# +# 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 Google Inc. 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 struct +import sys +import packet_pb2 + +def DecodeVarint(in_file): + """ + The decoding of the Varint32 is copied from + google.protobuf.internal.decoder and is only repeated here to + avoid depending on the internal functions in the library. If the + end of file is reached, return (0, 0). + """ + result = 0 + shift = 0 + pos = 0 + # Use a 32-bit mask + mask = 0xffffffff + while 1: + c = in_file.read(1) + if len(c) == 0: + return (0, 0) + b = struct.unpack('<B', c)[0] + result |= ((b & 0x7f) << shift) + pos += 1 + if not (b & 0x80): + if result > 0x7fffffffffffffff: + result -= (1 << 64) + result |= ~mask + else: + result &= mask + return (result, pos) + shift += 7 + if shift >= 64: + raise IOError('Too many bytes when decoding varint.') + +def decodeMessage(in_file, message): + """ + Attempt to read a message from the file and decode it. Return + False if no message could be read. + """ + try: + size, pos = DecodeVarint(in_file) + if size == 0: + return False + buf = in_file.read(size) + message.ParseFromString(buf) + return True + except IOError: + return False + +def main(): + if len(sys.argv) != 3: + print "Usage: ", sys.argv[0], " <protobuf input> <ASCII output>" + exit(-1) + + try: + 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" + exit(-1) + + print "Parsing packet header" + + # Add the packet header + header = packet_pb2.PacketHeader() + decodeMessage(proto_in, header) + + print "Object id:", header.obj_id + print "Tick frequency:", header.tick_freq + + print "Parsing packets" + + num_packets = 0 + ignored_flags = False + packet = packet_pb2.Packet() + + # Decode the packet messages until we hit the end of the file + while 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('flags'): + # Currently not printing flags + ignored_flags = True + ascii_out.write('%s,%s,%s,%s\n' % (cmd, packet.addr, packet.size, + packet.tick)) + + print "Parsed packets:", num_packets + if ignored_flags: + print "Encountered packet flags that were ignored" + + # We're done + ascii_out.close() + proto_in.close() + +if __name__ == "__main__": + main() |