util: Add decode and encode scripts for elastic traces

This patch adds python scripts to parse a protobuf encoded O3CPU
elastic trace and convert it to a text file output and vice versa.

1 files changed, 200 insertions, 0 deletions

diff --git a/util/decode_inst_dep_trace.py b/util/decode_inst_dep_trace.py
new file mode 100755
index 000000000..63c958d6d
--- /dev/null
+++ b/util/decode_inst_dep_trace.py
@@ -0,0 +1,200 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2013 - 2015 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: Radhika Jagtap
+#
+
+# This script is used to dump protobuf traces of the instruction dependency
+# graph to ASCII format.
+#
+# The ASCII trace format uses one line per instruction with the format
+# instruction sequence number, (optional) pc, (optional) weight, load, store,
+# (optional) flags, (optional) addr, (optional) size, comp delay,
+# (repeated) order dependencies comma-separated, and (repeated) register
+# dependencies comma-separated.
+#
+# examples:
+# seq_num,[pc],[weight,]load,store,[address,size,flags,]comp_delay:[rob_dep]:
+# [reg_dep]
+# 1,1,False,False,8500::
+# 2,1,False,False,1000:,1:
+# 3,1,True,False,831248,4,74,500:,2:
+# 4,1,False,False,0:,2:
+# 5,1,False,False,500::,4
+# 6,1,False,True,831248,4,74,1000:,3:,4,5
+
+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 inst_dep_record_pb2
+except:
+    print "Did not find proto definition, attempting to generate"
+    from subprocess import call
+    error = call(['protoc', '--python_out=util', '--proto_path=src/proto',
+                  'src/proto/inst_dep_record.proto'])
+    if not error:
+        import inst_dep_record_pb2
+        print "Generated proto definitions for instruction dependency record"
+    else:
+        print "Failed to import proto definitions"
+        exit(-1)
+
+def main():
+    if len(sys.argv) != 3:
+        print "Usage: ", sys.argv[0], " <protobuf input> <ASCII output>"
+        exit(-1)
+
+    # Open the file on read mode
+    proto_in = protolib.openFileRd(sys.argv[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 = inst_dep_record_pb2.InstDepRecordHeader()
+    protolib.decodeMessage(proto_in, header)
+
+    print "Object id:", header.obj_id
+    print "Tick frequency:", header.tick_freq
+
+    print "Parsing packets"
+
+    num_packets = 0
+    num_regdeps = 0
+    num_robdeps = 0
+    packet = inst_dep_record_pb2.InstDepRecord()
+
+    # Decode the packet messages until we hit the end of the file
+    while protolib.decodeMessage(proto_in, packet):
+        num_packets += 1
+
+        # Write to file the seq num
+        ascii_out.write('%s' % (packet.seq_num))
+        # Write to file the pc of the instruction, default is 0
+        if packet.HasField('pc'):
+            ascii_out.write(',%s' % (packet.pc))
+        else:
+            ascii_out.write(',0')
+        # Write to file the weight, default is 1
+        if packet.HasField('weight'):
+            ascii_out.write(',%s' % (packet.weight))
+        else:
+            ascii_out.write(',1')
+        # Write to file if it is a load and if it is a store
+        ascii_out.write(',%s,%s' % (packet.load, packet.store))
+
+        # Write to file if it has the optional fields addr, size, flags
+        if packet.HasField('addr'):
+            ascii_out.write(',%s' % (packet.addr))
+        if packet.HasField('size'):
+            ascii_out.write(',%s' % (packet.size))
+        if packet.HasField('flags'):
+            ascii_out.write(',%s' % (packet.flags))
+
+        # Write to file the comp delay
+        ascii_out.write(',%s' % (packet.comp_delay))
+
+        # Write to file the repeated field order dependency
+        ascii_out.write(':')
+        if packet.rob_dep:
+            num_robdeps += 1
+            for dep in packet.rob_dep:
+                ascii_out.write(',%s' % dep)
+        # Write to file the repeated field register dependency
+        ascii_out.write(':')
+        if packet.reg_dep:
+            num_regdeps += 1 # No. of packets with atleast 1 register dependency
+            for dep in packet.reg_dep:
+                ascii_out.write(',%s' % dep)
+        # New line
+        ascii_out.write('\n')
+
+    print "Parsed packets:", num_packets
+    print "Packets with at least 1 reg dep:", num_regdeps
+    print "Packets with at least 1 rob dep:", num_robdeps
+
+    # We're done
+    ascii_out.close()
+    proto_in.close()
+
+if __name__ == "__main__":
+    main()