2 ##--------------------------------------------------------------------##
3 ##--- Valgrind performance testing script vg_perf ---##
4 ##--------------------------------------------------------------------##
6 # This file is part of Valgrind, a dynamic binary instrumentation
9 # Copyright (C) 2005-2013 Nicholas Nethercote
12 # This program is free software; you can redistribute it and/or
13 # modify it under the terms of the GNU General Public License as
14 # published by the Free Software Foundation; either version 2 of the
15 # License, or (at your option) any later version.
17 # This program is distributed in the hope that it will be useful, but
18 # WITHOUT ANY WARRANTY; without even the implied warranty of
19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 # General Public License for more details.
22 # You should have received a copy of the GNU General Public License
23 # along with this program; if not, write to the Free Software
24 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
27 # The GNU General Public License is contained in the file COPYING.
29 #----------------------------------------------------------------------------
30 # usage: see usage message.
32 # You can specify individual files to test, or whole directories, or both.
33 # Directories are traversed recursively, except for ones named, for example,
36 # Each test is defined in a file <test>.vgperf, containing one or more of the
37 # following lines, in any order:
38 # - prog: <prog to run> (compulsory)
39 # - args: <args for prog> (default: none)
40 # - vgopts: <Valgrind options> (default: none)
41 # - prereq: <prerequisite command> (default: none)
42 # - cleanup: <post-test cleanup cmd to run> (default: none)
44 # The prerequisite command, if present, must return 0 otherwise the test is
46 # Sometimes it is useful to run all the tests at a high sanity check
47 # level or with arbitrary other flags. To make this simple, extra
48 # options, applied to all tests run, are read from $EXTRA_REGTEST_OPTS,
49 # and handed to valgrind prior to any other flags specified by the
50 # .vgperf file. Note: the env var is the same as vg_regtest.
51 #----------------------------------------------------------------------------
56 #----------------------------------------------------------------------------
58 #----------------------------------------------------------------------------
60 usage: vg_perf [options] [files or dirs]
62 options for the user, with defaults in [ ], are:
63 -h --help show this message
64 --reps=<n> number of repeats for each program [1]
65 --tools=<t1,t2,t3> tools to run [Nulgrind and Memcheck]
66 --vg=<dir> top-level directory containing Valgrind to measure
67 [Valgrind in the current directory, i.e. --vg=.]
68 Can be specified multiple times.
69 The "in-place" build is used.
71 --outer-valgrind: run these Valgrind(s) under the given outer valgrind.
72 These Valgrind(s) must be configured with --enable-inner.
73 --outer-tool: tool to use by the outer valgrind (default cachegrind).
74 --outer-args: use this as outer tool args.
76 Any tools named in --tools must be present in all directories specified
77 with --vg. (This is not checked.)
78 Use EXTRA_REGTEST_OPTS to supply extra args for all tests
83 my $vgopts; # valgrind options
85 my $args; # test prog args
86 my $prereq; # prerequisite test to satisfy before running test
87 my $cleanup; # cleanup command to run
89 # Command line options
90 my $n_reps = 1; # Run each test $n_reps times and choose the best one.
91 my @vgdirs; # Dirs of the various Valgrinds being measured.
92 my @tools = ("none", "memcheck"); # tools being measured
94 # Outer valgrind to use, and args to use for it.
95 # If this is set, --valgrind should be set to the installed inner valgrind,
96 # and --valgrind-lib will be ignore
98 my $outer_tool = "cachegrind";
102 my $num_tests_done = 0;
103 my $num_timings_done = 0;
106 chomp(my $tests_dir = `pwd`);
108 #----------------------------------------------------------------------------
109 # Process command line, setup
110 #----------------------------------------------------------------------------
112 # If $prog is a relative path, it prepends $dir to it. Useful for two reasons:
114 # 1. Can prepend "." onto programs to avoid trouble with users who don't have
115 # "." in their path (by making $dir = ".")
116 # 2. Can prepend the current dir to make the command absolute to avoid
117 # subsequent trouble when we change directories.
119 # Also checks the program exists and is executable.
120 sub validate_program ($$$$)
122 my ($dir, $prog, $must_exist, $must_be_executable) = @_;
124 # If absolute path, leave it alone. If relative, make it
125 # absolute -- by prepending current dir -- so we can change
126 # dirs and still use it.
127 $prog = "$dir/$prog" if ($prog !~ /^\//);
129 (-f $prog) or die "vg_perf: '$prog' not found or not a file ($dir)\n";
131 if ($must_be_executable) {
132 (-x $prog) or die "vg_perf: '$prog' not executable ($dir)\n";
141 if ($vgdir !~ /^\//) { $vgdir = "$tests_dir/$vgdir"; }
142 push(@vgdirs, $vgdir);
145 sub process_command_line()
149 for my $arg (@ARGV) {
151 if ($arg =~ /^--reps=(\d+)$/) {
153 if ($n_reps < 1) { die "bad --reps value: $n_reps\n"; }
154 } elsif ($arg =~ /^--vg=(.+)$/) {
155 # Make dir absolute if not already
157 } elsif ($arg =~ /^--tools=(.+)$/) {
158 @tools = split(/,/, $1);
159 } elsif ($arg =~ /^--outer-valgrind=(.*)$/) {
160 $outer_valgrind = $1;
161 } elsif ($arg =~ /^--outer-tool=(.*)$/) {
163 } elsif ($arg =~ /^--outer-args=(.*)$/) {
173 # If no --vg options were specified, use the current tree.
175 add_vgdir($tests_dir);
178 (0 != @fs) or die "No test files or directories specified\n";
183 #----------------------------------------------------------------------------
184 # Read a .vgperf file
185 #----------------------------------------------------------------------------
186 sub read_vgperf_file($)
191 ($vgopts, $prog, $args, $prereq, $cleanup)
192 = ("", undef, "", undef, undef, undef, undef);
194 open(INPUTFILE, "< $f") || die "File $f not openable\n";
196 while (my $line = <INPUTFILE>) {
197 if ($line =~ /^\s*#/ || $line =~ /^\s*$/) {
199 } elsif ($line =~ /^\s*vgopts:\s*(.*)$/) {
201 } elsif ($line =~ /^\s*prog:\s*(.*)$/) {
202 $prog = validate_program(".", $1, 1, 1);
203 } elsif ($line =~ /^\s*args:\s*(.*)$/) {
205 } elsif ($line =~ /^\s*prereq:\s*(.*)$/) {
207 } elsif ($line =~ /^\s*cleanup:\s*(.*)$/) {
210 die "Bad line in $f: $line\n";
215 if (!defined $prog) {
216 $prog = ""; # allow no prog for testing error and --help cases
219 die "vg_perf: missing 'tools' line in $f\n";
223 #----------------------------------------------------------------------------
225 #----------------------------------------------------------------------------
226 # Since most of the program time is spent in system() calls, need this to
227 # propagate a Ctrl-C enabling us to quit.
231 my $retval = system($cmd);
239 # Run program N times, return the best user time. Use the POSIX
240 # -p flag on /usr/bin/time so as to get something parseable on AIX.
245 for (my $i = 0; $i < $n; $i++) {
246 mysystem("echo '$cmd' > perf.cmd");
247 my $retval = mysystem("$cmd > perf.stdout 2> perf.stderr");
249 die "\n*** Command returned non-zero ($retval)"
250 . "\n*** See perf.{cmd,stdout,stderr} to determine what went wrong.\n";
251 my $out = `cat perf.stderr`;
252 ($out =~ /[Uu]ser +([\d\.]+)/) or
253 die "\n*** missing usertime in perf.stderr\n";
254 $tmin = $1 if ($1 < $tmin);
257 # Successful run; cleanup
259 unlink("perf.stderr");
260 unlink("perf.stdout");
262 # Avoid divisions by zero!
263 return (0 == $tmin ? 0.01 : $tmin);
268 my ($dir, $vgperf) = @_;
269 $vgperf =~ /^(.*)\.vgperf/;
271 my %first_tTool; # For doing percentage speedups when comparing
274 read_vgperf_file($vgperf);
276 if (defined $prereq) {
277 if (system("$prereq") != 0) {
278 printf("%-16s (skipping, prereq failed: $prereq)\n", "$name:");
283 my $timecmd = "/usr/bin/time -p";
285 # Do the native run(s).
286 printf("-- $name --\n") if (@vgdirs > 1);
287 my $cmd = "$timecmd $prog $args";
288 my $tNative = time_prog($cmd, $n_reps);
290 if (defined $outer_valgrind) {
291 $outer_valgrind = validate_program($tests_dir, $outer_valgrind, 1, 1);
292 foreach my $vgdir (@vgdirs) {
293 validate_program($vgdir, "./coregrind/valgrind", 1, 1);
296 foreach my $vgdir (@vgdirs) {
297 validate_program($vgdir, "./coregrind/valgrind", 1, 1);
301 # Pull any extra options (for example, --sanity-level=4)
302 # from $EXTRA_REGTEST_OPTS.
303 my $maybe_extraopts = $ENV{"EXTRA_REGTEST_OPTS"};
304 my $extraopts = $maybe_extraopts ? $maybe_extraopts : "";
306 foreach my $vgdir (@vgdirs) {
308 printf("%-8s ", $name);
310 # Print the Valgrind version if we are measuring more than one.
311 my $vgdirname = $vgdir;
312 chomp($vgdirname = `basename $vgdir`);
313 printf("%-10s:", $vgdirname);
315 # Native execution time
316 printf("%4.2fs", $tNative);
318 foreach my $tool (@tools) {
319 # First two chars of toolname for abbreviation
320 my $tool_abbrev = $tool;
321 $tool_abbrev =~ s/(..).*/$1/;
322 printf(" %s:", $tool_abbrev);
323 my $run_outer_args = "";
324 if (not defined $outer_args) {
326 " -v --command-line-only=yes"
327 . " --run-libc-freeres=no --sim-hints=enable-outer"
328 . " --smc-check=all-non-file"
329 . " --vgdb=no --trace-children=yes --read-var-info=no"
330 . " --suppressions=../tests/outer_inner.supp"
331 . " --memcheck:leak-check=full --memcheck:show-reachable=no"
332 . " --cachegrind:cache-sim=yes --cachegrind:branch-sim=yes"
333 . " --cachegrind:cachegrind-out-file=cachegrind.out.$vgdirname.$tool_abbrev.$name.%p"
334 . " --callgrind:cache-sim=yes --callgrind:branch-sim=yes"
335 . " --callgrind:dump-instr=yes --callgrind:collect-jumps=yes"
336 . " --callgrind:callgrind-out-file=callgrind.out.$vgdirname.$tool_abbrev.$name.%p"
339 $run_outer_args = $outer_args;
343 my $vgcmd = "$vgdir/coregrind/valgrind "
344 . "--command-line-only=yes --tool=$tool $extraopts -q "
345 . "--memcheck:leak-check=no "
346 . "--trace-children=yes "
348 # Do the tool run(s).
349 if (defined $outer_valgrind ) {
350 # in an outer-inner setup, only set VALGRIND_LIB_INNER
351 $vgsetup = "VALGRIND_LIB_INNER=$vgdir/.in_place ";
352 $vgcmd = "$outer_valgrind "
353 . "--tool=" . $outer_tool . " "
355 . "--log-file=" . "$outer_tool.outer.log.$vgdirname.$tool_abbrev.$name.%p "
358 # Set both VALGRIND_LIB and VALGRIND_LIB_INNER
359 # in case this Valgrind was configured with --enable-inner. And
360 # also VALGRINDLIB, which was the old name for the variable, to
361 # allow comparison against old Valgrind versions (eg. 2.4.X).
362 $vgsetup = "VALGRINDLIB=$vgdir/.in_place "
363 . "VALGRIND_LIB=$vgdir/.in_place "
364 . "VALGRIND_LIB_INNER=$vgdir/.in_place ";
366 my $cmd = "$vgsetup $timecmd $vgcmd $prog $args";
367 my $tTool = time_prog($cmd, $n_reps);
368 printf("%4.1fs (%4.1fx,", $tTool, $tTool/$tNative);
370 # If it's the first timing for this tool on this benchmark,
371 # record the time so we can get the percentage speedup of the
372 # subsequent Valgrinds. Otherwise, compute and print
374 if (not defined $first_tTool{$tool}) {
375 $first_tTool{$tool} = $tTool;
378 my $speedup = 100 - (100 * $tTool / $first_tTool{$tool});
379 printf("%5.1f%%)", $speedup);
384 if (defined $cleanup) {
385 (system("$cleanup") == 0) or
386 print(" ($name cleanup operation failed: $cleanup)\n");
395 #----------------------------------------------------------------------------
396 # Test one directory (and any subdirs)
397 #----------------------------------------------------------------------------
398 sub test_one_dir($$); # forward declaration
402 my ($dir, $prev_dirs) = @_;
403 $dir =~ s/\/$//; # trim a trailing '/'
405 chomp(my $initial_dir = `pwd`); # record where we started
407 # Ignore dirs into which we should not recurse.
408 if ($dir =~ /^(BitKeeper|CVS|SCCS|docs|doc)$/) { return; }
410 chdir($dir) or die "Could not change into $dir\n";
412 # Nb: Don't prepend a '/' to the base directory
413 my $full_dir = $prev_dirs . ($prev_dirs eq "" ? "" : "/") . $dir;
414 my $dashes = "-" x (50 - length $full_dir);
417 my $found_tests = (0 != (grep { $_ =~ /\.vgperf$/ } @fs));
420 print "-- Running tests in $full_dir $dashes\n";
422 foreach my $f (@fs) {
424 test_one_dir($f, $full_dir);
425 } elsif ($f =~ /\.vgperf$/) {
426 do_one_test($full_dir, $f);
430 print "-- Finished tests in $full_dir $dashes\n";
433 chdir("$initial_dir");
436 #----------------------------------------------------------------------------
438 #----------------------------------------------------------------------------
439 sub summarise_results
441 printf("\n== %d programs, %d timings =================\n\n",
442 $num_tests_done, $num_timings_done);
445 #----------------------------------------------------------------------------
447 #----------------------------------------------------------------------------
448 sub warn_about_EXTRA_REGTEST_OPTS()
450 print "WARNING: \$EXTRA_REGTEST_OPTS is set. You probably don't want\n";
451 print "to run the perf tests with it set, unless you are doing some\n";
452 print "strange experiment, and/or you really know what you are doing.\n";
457 $ENV{"VALGRIND_OPTS"} = "";
459 if ($ENV{"EXTRA_REGTEST_OPTS"}) {
461 warn_about_EXTRA_REGTEST_OPTS();
464 my @fs = process_command_line();
465 foreach my $f (@fs) {
467 test_one_dir($f, "");
469 # Allow the .vgperf suffix to be given or omitted
470 if ($f =~ /.vgperf$/ && -r $f) {
472 } elsif (-r "$f.vgperf") {
475 die "`$f' neither a directory nor a readable test file/name\n"
477 my $dir = `dirname $f`; chomp $dir;
478 my $file = `basename $f`; chomp $file;
479 chdir($dir) or die "Could not change into $dir\n";
480 do_one_test($dir, $file);
486 if ($ENV{"EXTRA_REGTEST_OPTS"}) {
487 warn_about_EXTRA_REGTEST_OPTS();
490 ##--------------------------------------------------------------------##
492 ##--------------------------------------------------------------------##