1#!/usr/bin/perl
2# Copyright (c) 2001-2005 The Regents of The University of Michigan
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions are
7# met: redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer;

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31# This script diffs two SimpleScalar statistics output files.
32#
33
34use Getopt::Std;
35
36#
37# -t thresh sets threshold for ignoring differences (in %)
38# -p sorts differences by % chg (default is alphabetic)
39# -f ignores fetch-loss statistics
40# -d ignores all distributions
41#
42
43getopts('dfn:pt:h');
44
45if ($#ARGV < 1)
46{
47 print "\nError: need two file arguments (<reference> <new>).\n";
48 print " Options: -d = Ignore distributions\n";
49 print " -f = Ignore fetch-loss stats\n";
50 print " -p = Sort errors by percentage\n";
51 print " -h = Diff header info separately from stats\n";
52 print " -n <num> = Print top <num> errors (default 20)\n";
53 print " -t <num> = Error threshold in percent (default 1)\n\n";
54 die -1;
55}
56
57open(REF, "<$ARGV[0]") or die "Error: can't open $ARGV[0].\n";

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125 $stathandle = shift;
126
127 $in_dist = undef;
128 $hashref = { }; # initialize hash for values
129
130 while (<$stathandle>)
131 {
132 next if /^\s*$/; # skip blank lines
133 next if /^\*\*Ignore/; # temporary, to make totaling scripts easy for ISCA 03
134 last if /End Simulation Statistics/;
135
136 s/ *#.*//; # strip comments
137
138 if (/^Memory usage: (\d+) KBytes/) {
139 $stat = 'memory usage';
140 $value = $1;
141 }
142 elsif ($in_dist) {
143 if ($in_dist =~ /^fetch_loss_counters/) {
144 if (/^fetch_loss_counters_\d+\.end/) {
145 # end line of distribution: clear $in_dist flag
146 $in_dist = undef;
147 next;
148 }
149 else {
150 next if $opt_f;
151
152 ($stat, $value) = /^(\S+)\s+(.*)/;
153 }
154 }
155 else {
156 if (/(.*)\.end_dist/) {
157 # end line of distribution: clear $in_dist flag
158 $in_dist = undef;
159 next;
160 }
161 if ($opt_d) {
162 next; # bail out if we are ignoring dists...
163 }
164 elsif (/(.*)\.(min|max)_value/) {
165 # treat these like normal stats
166 ($stat, $value) = /^(\S+)\s+(.*)/;
167 }
168 else {
169 # this is ugly because labels in the distribution
170 # buckets don't start in column 0 and may include
171 # embedded spaces
172 ($stat, $value) =
173 /^\s*(\S+(?:.*\S)?)\s+(\d+)\s+\d+\.\d+%/;
174 $stat = $in_dist . '::' . $stat;
175 }
176 }
177 }
178 else {
179 if (/(.*)\.start_dist/) {
180 # start line of distribution: set $in_dist flag
181 # and save distribution name for future reference
182 $in_dist = $1;
183 $stat = $1;
184 $value = 0;
185 }
186 elsif (/^(fetch_loss_counters_\d+)\.start/) {
187 # treat fetch loss counters like distribution, sort of
188 $in_dist = $1;
189 $stat = $1;
190 $value = 0;
191 }
192 else {
193 ($stat, $value) = /^(\S+)\s+(.*)/;
194 }
195 }
196
197 $$hashref{$stat} = $value;
198 }
199

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349 if (++$num_errs >= $omit_count)
350 {
351 print "[... additional errors omitted ...]\n";
352 last;
353 }
354}
355
356#
357# Report missing stats, but first filter out distribution buckets:
358# these are mostly noise
359
360@missing_stats = grep { !/::(\d+|overflows)?$/ } @missing_stats;
361
362# get count
363$missing_stats = scalar(@missing_stats);
364
365if ($missing_stats)
366{
367 print "\nMissing $missing_stats reference statistics:\n\n";
368 foreach $stat (@missing_stats)
369 {

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374}
375
376#
377# Any stats left in newhash are added since the reference file
378#
379
380@added_stats = keys %$newhash;
381
382# first filter out distribution buckets: mostly noise
383
384@added_stats = grep { !/::(\d+|overflows)?$/ } @added_stats;
385
386# get count
387$added_stats = scalar(@added_stats);
388
389if ($added_stats)
390{
391 print "\nFound $added_stats new statistics:\n\n";
392 foreach $stat (sort @added_stats)
393 {
394# print "\t$stat\n";
395 printf " %-50s ", $stat;
396 print "$$newhash{$stat}\n";
397 }
398}
399
400cleanup();
401# Exit code is 0 if some stats found & no stats error, 1 otherwise
402$status = ($#key_stats >= 0 && $max_err_mag == 0.0) ? 0 : 1;
403exit $status;
404
405sub cleanup
406{
407 unlink($refheader) if ($refheader);
408 unlink($newheader) if ($newheader);
409}