summaryrefslogtreecommitdiff
path: root/util/decode_packet_trace.py
blob: e6f36c295afa0cc562a37a098b2568bcd5131c9a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
#!/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()