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, 189 insertions, 0 deletions

diff --git a/util/encode_inst_dep_trace.py b/util/encode_inst_dep_trace.py
new file mode 100755
index 000000000..9e2b1613f
--- /dev/null
+++ b/util/encode_inst_dep_trace.py
@@ -0,0 +1,189 @@
+#!/usr/bin/env python
+
+# Copyright (c) 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 ASCII traces of the instruction dependency
+# graph to protobuf 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], " <ASCII input> <protobuf output>"
+        exit(-1)
+
+    # Open the file in write mode
+    proto_out = open(sys.argv[2], 'wb')
+
+    # Open the file in read mode
+    try:
+        ascii_in = open(sys.argv[1], 'r')
+    except IOError:
+        print "Failed to open ", sys.argv[1], " for reading"
+        exit(-1)
+
+    # Write the magic number in 4-byte Little Endian, similar to what
+    # is done in src/proto/protoio.cc
+    proto_out.write("gem5")
+
+    # Add the packet header
+    header = inst_dep_record_pb2.InstDepRecordHeader()
+    header.obj_id = "Converted ASCII trace " + sys.argv[1]
+    # Assume the default tick rate
+    header.tick_freq = 1000000000
+    header.window_size = 120
+    protolib.encodeMessage(proto_out, header)
+
+    num_records = 0
+    # For each line in the ASCII trace, create a packet message and
+    # write it to the encoded output
+    for line in ascii_in:
+        inst_info_str, rob_dep_str, reg_dep_str = (line.strip()).split(':')
+        inst_info_list = inst_info_str.split(',')
+        dep_record = inst_dep_record_pb2.InstDepRecord()
+
+        dep_record.seq_num = long(inst_info_list[0])
+        dep_record.pc = long(inst_info_list[1])
+        dep_record.weight = long(inst_info_list[2])
+        dep_record.load = True if inst_info_list[3] == 'True' else  False
+        dep_record.store = True if inst_info_list[4] == 'True' else  False
+
+        # If the instruction is a load or store record the addr, size flags
+        # in addition to recording the computation delay
+        if dep_record.load or dep_record.store:
+            addr, size, flags, comp_delay = inst_info_list[5:9]
+            dep_record.addr = long(addr)
+            dep_record.size = int(size)
+            dep_record.flags = int(flags)
+            dep_record.comp_delay = long(comp_delay)
+        elif not dep_record.load and not dep_record.store:
+            comp_delay = inst_info_list[4]
+            dep_record.comp_delay = long(comp_delay)
+        else:
+            print "Fatal:", seq_num, "is both load and store"
+            exit(1)
+
+        # Parse the register and order dependencies both of which are
+        # repeated fields. An empty list is valid.
+        rob_deps = rob_dep_str.strip().split(',')
+        for a_dep in rob_deps:
+            # if the string is empty, split(',') returns 1 item: ''
+            # if the string is ",4", split(',') returns 2 items: '', '4'
+            # long('') gives error, so check if the item is non-empty
+            if a_dep:
+                dep_record.rob_dep.append(long(a_dep))
+
+        reg_deps = reg_dep_str.split(',')
+        for a_dep in reg_deps:
+            if a_dep:
+                dep_record.reg_dep.append(long(a_dep))
+
+        protolib.encodeMessage(proto_out, dep_record)
+        num_records += 1
+
+    print "Converted", num_records, "records."
+    # We're done
+    ascii_in.close()
+    proto_out.close()
+
+if __name__ == "__main__":
+    main()