util/tracediff

#! /usr/bin/env perl
# Copyright (c) 2003-2005 The Regents of The University of Michigan
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#
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# redistributions in binary form must reproduce the above copyright
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# Authors: Steve Reinhardt

# Script to simplify using rundiff on trace outputs from two
# invocations of m5.
#
# Note that you need to enable some trace flags in the args in order
# to do anything useful!
#
# If you want to pass different arguments to the two instances of m5,
# you can embed them in the simulator arguments like this:
#
# % tracediff "m5.opt --foo:bar=1" "m5.opt --foo:bar=2" [common args]
#

if (@ARGV < 2) {
    die "Usage: tracediff sim1 sim2 [--trace:flags=X args...]\n";
}

# First two args are the two simulator binaries to compare
$sim1 = shift;
$sim2 = shift;

# Everything else on the command line is taken to be an m5 argument to
# be given to both invocations
$simargs = '"' . join('" "', @ARGV) . '"';

# Redirect config output to cout so that gets diffed too (in case
# that's the source of the problem).
$simargs .= " --root:config_output_file=cout";

$cmd1 = "$sim1 $simargs --stats:text_file=tracediff-$$-1.stats 2>&1 |";
$cmd2 = "$sim2 $simargs --stats:text_file=tracediff-$$-2.stats 2>&1 |";

# This only works if you have rundiff in your path.  I just edit it
# with an explicit path if necessary.
$fullcmd = "rundiff '$cmd1' '$cmd2' 2>&1 > tracediff-$$.out";

print "Executing $fullcmd\n";
system($fullcmd);