gcc/testsuite/lib/profopt.exp

   1 #   Copyright (C) 2001 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 2 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program; if not, write to the Free Software
  15 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  16 #
  17 # This script was submitted by Janis Johnson <janis187@us.ibm.com>.
  18
  19 # Test the functionality and optionally, performance improvement, of
  20 # programs compiled with profile-directed optimizations.  Compile and
  21 # run a test with profile options, compile it with options using the
  22 # profile feedback, and then run the test again.  Optionally compile
  23 # and run a third time without the profile-directed optimization and
  24 # compare timing results of the program with normal optimization and
  25 # with the profile-directed optimization. Each test is run using
  26 # multiple sets of optimization and/or code generation options in
  27 # addition to the profiling and feedback options.
  28
  29 # If perf_ext is defined and the performance value for the
  30 # profile-directed test run is nonzero then the performance check will
  31 # be done.
  32
  33 global PROFOPT_OPTIONS perf_delta
  34
  35 # The including .exp file must define these.
  36 global tool profile_option feedback_option prof_ext
  37 if ![info exists tool] {
  38     error "Tools is not specified."
  39 }
  40 if ![info exists profile_option] {
  41     error "No profile option specified for first compile."
  42 }
  43 if ![info exists feedback_option] {
  44     error "No feedback option specified for second compile."
  45 }
  46 if ![info exists prof_ext] {
  47     error "No profile data file extension specified."
  48 }
  49
  50 # The maximum perforance degradation can be defined in the including file.
  51 if ![info exists perf_delta] {
  52     set perf_delta 4
  53 }
  54
  55 # The default option list can be overridden by
  56 # PROFOPT_OPTIONS="{ { list1 } ... { list2 } }"
  57
  58 if ![info exists PROFOPT_OPTIONS] {
  59     set PROFOPT_OPTIONS [list \
  60         { -g } \
  61         { -O0 } \
  62         { -O1 } \
  63         { -O2 } \
  64         { -O3 } \
  65         { -O3 -g } \
  66         { -Os } ]
  67 }
  68
  69 set prof_option_list $PROFOPT_OPTIONS
  70
  71 #
  72 # profopt-cleanup -- remove profiling or performance results files.
  73 #
  74 # TESTCASE is the name of the test
  75 # EXT is the extension of file to remove
  76 #
  77 proc profopt-cleanup { testcase ext } {
  78     set basename [file tail $testcase]
  79     set base [file rootname $basename]
  80     set files [glob -nocomplain $base.$ext]
  81     if { $files != "" } {
  82         eval "remote_file build delete $files"
  83     }
  84 }
  85
  86 #
  87 # profopt-perf-value -- get performance value for a test
  88 #
  89 # TESTCASE is the name of the test
  90 # PERF_EXT is the extension of the performance result file
  91 # OPTSTR is the string of compiler options
  92 #
  93 proc profopt-perf-value { testcase perf_ext optstr } {
  94     set basename [file tail $testcase]
  95     set base [file rootname $basename]
  96     set files [glob -nocomplain $base.$perf_ext]
  97     # The file doesn't exist; let the caller decide if that's a problem.
  98     if { $files == "" } {
  99         return -2
 100     }
 101     remote_upload host $base.$perf_ext $base.$perf_ext
 102     set fd [open $base.$perf_ext r]
 103     gets $fd line
 104     set val -2
 105     if [regexp "TIME" $line] {
 106         if [regexp "TIME -1" $line] {
 107             fail "$testcase perf check: no consistent time available, $optstr"
 108             set val -1
 109         } elseif ![regexp "(\[0-9\]+)" "$line" val] {
 110             set val -2
 111         }
 112     }
 113     # Report problems with an existing file.
 114     if { $val == -2 } {
 115         fail "$testcase perf check: file $base.$perf_ext has wrong format, $optstr"
 116     }
 117     close $fd
 118     profopt-cleanup $testcase $perf_ext
 119     return $val
 120 }
 121
 122 #
 123 # c-prof-execute -- compile for profiling and then feedback, then normal
 124 #
 125 # SRC is the full pathname of the testcase.
 126 #
 127 proc profopt-execute { src } {
 128     global srcdir tmpdir
 129     global prof_option_list
 130     global tool profile_option feedback_option prof_ext perf_ext perf_delta
 131     global verbose
 132
 133     regsub "^$srcdir/?" $src "" testcase
 134     # If we couldn't rip $srcdir out of `src' then just do the best we can.
 135     # The point is to reduce the unnecessary noise in the logs.  Don't strip
 136     # out too much because different testcases with the same name can confuse
 137     # `test-tool'.
 138     if [string match "/*" $testcase] {
 139         set testcase "[file tail [file dirname $src]]/[file tail $src]"
 140     }
 141
 142     set executable $tmpdir/[file tail [file rootname $src].x]
 143
 144     set count 0
 145     foreach option $prof_option_list {
 146         set execname1 "${executable}${count}1"
 147         set execname2 "${executable}${count}2"
 148         set execname3 "${executable}${count}3"
 149         incr count
 150
 151         remote_file build delete $execname1
 152         remote_file build delete $execname2
 153         remote_file build delete $execname3
 154         verbose "Testing $testcase, $option" 1
 155
 156         # Remove old profiling and performance data files.
 157         profopt-cleanup $testcase $prof_ext
 158         if [info exists perf_ext] {
 159             profopt-cleanup $testcase $perf_ext
 160         }
 161
 162         # Compile for profiling.
 163
 164         set options ""
 165         lappend options "additional_flags=$option $profile_option"
 166         set optstr "$option $profile_option"
 167         set comp_output [${tool}_target_compile "$src" "$execname1" executable $options];
 168         if ![${tool}_check_compile "$testcase compilation" $optstr $execname1 $comp_output] {
 169             unresolved "$testcase execution,   $optstr"
 170             unresolved "$testcase compilation, $option $feedback_option"
 171             unresolved "$testcase execution,   $option $feedback_option"
 172             continue
 173         }
 174
 175         # Run the profiled test.
 176
 177         set result [${tool}_load $execname1 "" ""]
 178         set status [lindex $result 0]
 179         # Make sure the profile data was generated, and fail if not.
 180         if { $status == "pass" } {
 181             set basename [file tail $testcase]
 182             set base [file rootname $basename]
 183             set files [glob -nocomplain $base.$prof_ext]
 184             if { $files == "" } {
 185                 set status "fail"
 186                 fail "$testcase execution: file $base.$prof_ext does not exist, $option $profile_option"
 187             } else {
 188                 $status "$testcase execution,   $optstr"
 189             }
 190         } else {
 191             $status "$testcase execution,   $optstr"
 192         }
 193         # Quit for this round if it failed
 194         if { $status != "pass" } {
 195             unresolved "$testcase compilation, $option $feedback_option"
 196             unresolved "$testcase execution,   $option $feedback_option"
 197             continue
 198         }
 199         remote_file build delete $execname1
 200
 201         # Compile with feedback-directed optimizations.
 202
 203         set options ""
 204         lappend options "additional_flags=$option $feedback_option"
 205         set optstr "$option $feedback_option"
 206         set comp_output [${tool}_target_compile "$src" "$execname2" "executable" $options];
 207         if ![${tool}_check_compile "$testcase compilation" $optstr $execname2 $comp_output] {
 208             unresolved "$testcase execution,   $optstr"
 209             continue
 210         }
 211
 212         # Run the profile-directed optimized test.
 213
 214         set result [${tool}_load "$execname2" "" ""]
 215         set status [lindex $result 0]
 216         $status "$testcase execution,   $optstr"
 217         if { $status != "pass" } {
 218             continue
 219         }
 220
 221         # Remove the profiling data files.
 222         profopt-cleanup $testcase $prof_ext
 223
 224         # If the test is not expected to produce performance data then
 225         # we're done now.
 226         if ![info exists perf_ext] {
 227             remote_file build delete $execname2
 228             continue
 229         }
 230
 231         # Get the performance data from the test built with
 232         # profile-directed optimization.  If the file doesn't exist or if
 233         # the value is zero, skip the performance comparison.
 234         set val2 [profopt-perf-value $testcase $perf_ext $optstr]
 235         if { $val2 <= 0 } {
 236             remote_file build delete $execname2
 237             continue
 238         }
 239
 240         # Compile with normal optimizations.
 241
 242         set options ""
 243         lappend options "additional_flags=$option"
 244         set optstr "$option"
 245         set comp_output [${tool}_target_compile "$src" "$execname3" "executable" $options];
 246         if ![${tool}_check_compile "$testcase compilation" $optstr $execname3 $comp_output] {
 247             unresolved "$testcase execution,   $optstr"
 248             unresolved "$testcase perf check,  $optstr"
 249             continue
 250         }
 251
 252         # Run the test with normal optimizations.
 253
 254         set result [${tool}_load "$execname3" "" ""]
 255         set status [lindex $result 0]
 256         $status "$testcase execution,   $optstr"
 257         if { $status != "pass" } {
 258             unresolved "$testcase perf check, $optstr"
 259             continue
 260         }
 261
 262         # Get the performance data from the test built with normal
 263         # optimization.
 264         set val1 [profopt-perf-value $testcase $perf_ext $optstr]
 265         if { $val1 < 0 } {
 266             if { $val1 == -2 } {
 267                 # The data file existed with the profile-directed
 268                 # optimization so this one should, too.
 269                 fail "$testcase perf check: file $base.$perf_ext does not exist, $optstr"
 270             }
 271             continue
 272         }
 273
 274         # Compare results of the two runs and fail if the time with the
 275         # profile-directed optimization is significantly more than the time
 276         # without it.
 277         set status "pass"
 278         if { $val2 > $val1 } {
 279             # Check for a performance degration outside of allowable limits.
 280             if { [expr $val2 - $val1] > [expr [expr $val1 * $perf_delta] / 100] } {
 281                 set status "fail"
 282             }
 283         }
 284         if { $status == "fail" } {
 285             fail "$testcase perf check: orig: $val1  new: $val2, $optstr"
 286         } else {
 287             $status "$testcase perf check,  $optstr"
 288             verbose "$testcase orig: $val1  new: $val2, $optstr" 2
 289             remote_file build delete $execname2
 290             remote_file build delete $execname3
 291         }
 292     }
 293 }