Profiling support, tools and documentation.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8375 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 340 insertions, 0 deletions

diff --git a/tools/profile_reader/profile_comparator.pl b/tools/profile_reader/profile_comparator.pl
new file mode 100755
index 0000000..da5e300
--- /dev/null
+++ b/tools/profile_reader/profile_comparator.pl
@@ -0,0 +1,104 @@
+#!/usr/bin/perl
+sub error {
+  print("Error: @_\n");
+  exit(1);
+}
+sub usage {
+  if (@_) {
+    print STDERR ("Error: @_\n");
+  }
+  print STDERR ("USAGE:\n");
+  print STDERR ("$0 file1 file2 [showcalldiff]\n");
+  print STDERR
+    ("\tfile[12]      output from profile_reader.pl to compare\n");
+  print STDERR
+    ("\tshowcalldiff  show the percent change in calls instead of ticks\n");
+  exit(1);
+}
+if ($ARGV[0] =~ m/-(h|help|-help)/) {
+  usage();
+}
+if (@ARGV < 2) {
+  usage("Requires at least 2 arguments");
+}
+open(FILE1,shift) || error("Couldn't open file1");
+my @file1 = <FILE1>;
+close(FILE1);
+open(FILE2,shift) || error("Couldn't open file2");
+my @file2 = <FILE2>;
+close(FILE2);
+my $showcalldiff = shift;
+my %calls1;
+my %calls2;
+my @calls = (\%calls1,\%calls2);
+my $start = 0;
+my @files = (\@file1,\@file2);
+my @allcalls = (0,0);
+my @allticks = (0,0);
+for ( $i=0; $i <= $#files; $i++ ) {
+  my $file = $files[$i];
+  foreach $line(@$file) {
+    chomp($line);
+    if ( $line =~ m/By calls/ ) {
+      $start = 1;
+      next;
+    }
+    if ( $line =~ m/By ticks/ ) {
+      $start = 0;
+      last;
+    }
+    if ( $start == 1) {
+      my @line = split(/[[:space:]]+/,$line);
+      $allcalls[$i] += $line[1];
+      $allticks[$i] += $line[3];
+      $calls[$i]{$line[5]} = [($line[1],$line[3])];
+    }
+  }
+}
+printf("File one calls: %08ld, ticks: %08ld\n",$allcalls[0],$allticks[0]);
+printf("File two calls: %08ld, ticks: %08ld\n",$allcalls[1],$allticks[1]);
+printf("Percent change: %+7.2f%%, ticks: %+7.2f%%\n",
+        ($allcalls[1]-$allcalls[0])/$allcalls[0]*100,
+        ($allticks[1]-$allticks[0])/$allticks[0]*100);
+my @allkeys = keys(%calls1);
+push(@allkeys,keys(%calls2));
+my %u = ();
+my @keys = grep {defined} map {
+  if (exists $u{$_}) { undef; } else { $u{$_}=undef;$_; }
+} @allkeys;
+undef %u;
+my %byticks;
+my %bycalls;
+foreach $key(@keys) {
+  my $values1 = $calls1{$key};
+  my $values2 = $calls2{$key};
+  my $calldiff = @$values2[0]-@$values1[0];
+  my $totalcalls = @$values2[0]+@$values1[0];
+  my $tickdiff = @$values2[1]-@$values1[1];
+  my $totalticks = @$values2[1]+@$values1[1];
+  my $pdiff;
+  my $result;
+  if ($showcalldiff) {
+    $pdiff = $calldiff/(@$values1[0]>0?@$values1[0]:1)*100;
+    $result = sprintf("%+7.2f%%  Calls: %+09d  Symbol: %s$key\n", 
+        $pdiff, $calldiff,
+        (exists $calls1{$key} && exists $calls2{$key})?"":"LONE ");
+  } else {
+    $pdiff = $tickdiff/(@$values1[1]>0?@$values1[1]:1)*100;
+    $result = sprintf("%+7.2f%%  Ticks: %+09d  Symbol: %s$key\n", 
+        $pdiff, $tickdiff, 
+        (exists $calls1{$key} && exists $calls2{$key})?"":"LONE ");
+  }
+  $bycalls{sprintf("%08X$key",$totalcalls)} = $result;
+  $byticks{sprintf("%08X$key",$totalticks)} = $result;
+}
+my @calls = sort(keys(%bycalls));
+print("By calls\n");
+foreach $call(@calls) {
+  print($bycalls{$call});
+}
+my @ticks = sort(keys(%byticks));
+print("By ticks\n");
+foreach $tick(@ticks) {
+  print($byticks{$tick});
+}
diff --git a/tools/profile_reader/profile_reader.pl b/tools/profile_reader/profile_reader.pl
new file mode 100755
index 0000000..088ba71
--- /dev/null
+++ b/tools/profile_reader/profile_reader.pl
@@ -0,0 +1,236 @@
+#!/usr/bin/perl
+
+sub error {
+    print STDERR ("Error: @_\n");
+    exit(1);
+}
+
+sub warning {
+    print STDERR ("Warning: @_\n");
+}
+
+# string (filename.map)
+# return hash(string:hash(string:number))
+sub read_map {
+    open(MAP_FILE,$_[0]) || error("Couldn't open a map $_[0]");
+    my %retval;
+    while (<MAP_FILE>) {
+        chomp;
+        my @parts = split(/[[:space:]]+/);
+        if (@parts != 5) {
+            next;
+        }
+        if ($parts[1] =~ m/\.(text|data|rodata|bss|icode|idata|irodata|ibss)/) {
+            my $region = $parts[1];
+            my $number = $parts[2];
+            @parts = split(/\//,$parts[4]);
+            @parts = split(/[\(\)]/,$parts[$#parts]);
+            my $library = $retval{$parts[0]};
+            my %library =  %$library;
+            my $object = $parts[$#parts];
+            $library{$object . $region} = $number;
+            $retval{$parts[0]} = \%library;
+        }
+    }
+    close(MAP_FILE);
+    return %retval;
+}
+
+# string (filename.[ao]), hash(string:number)
+# return hash(number:string)
+sub read_library {
+    open(OBJECT_FILE,"objdump -t $_[0] |") || 
+        error("Couldn't pipe objdump for $_[0]");
+    my $library = $_[1];
+    my %library = %$library;
+    my %retval;
+    my $object;
+    while (<OBJECT_FILE>) {
+        chomp;
+        my @parts = split(/[[:space:]]+/);
+        if ($parts[0] =~ m/:$/) {
+            $object = $parts[0];
+            $object =~ s/:$//;
+            next;
+        }
+        if (@parts != 6) {
+            next;
+        }
+        if ($parts[0] eq "") {
+            next;
+        }
+        if ($parts[3] eq $parts[5]) {
+            next;
+        }
+        if ($parts[3] =~ m/\.(text|data|rodata|bss|icode|idata|irodata|ibss)/) {
+            my $region = $parts[3];
+            my $symbolOffset = hex("0x" . $parts[0]);
+            my $sectionOffset = hex($library{$object . $region});
+            my $location = $symbolOffset + $sectionOffset;
+            $retval{$location} = $parts[5] . "(" . $object . ")";
+        }
+    }
+    close(OBJECT_FILE);
+    return %retval;
+}
+
+# string (0xFFFFFFFF), hash(number:string)
+# return string
+sub get_name {
+    my $location = hex($_[0]);
+    my $offsets = $_[1];
+    my %offsets = %$offsets;
+    if (exists $offsets{$location}) {
+        return $offsets{$location};
+    } else {
+        my $retval = $_[0];
+        $retval =~ y/[A-Z]/a-z/;
+        warning("No symbol found for $retval");
+        return $retval;
+    }
+}
+
+# string (filename), hash(number:string)
+# return array(array(number,number,string))
+sub create_list {
+    open(PROFILE_FILE,$_[0]) || 
+        error("Could not open profile file: $profile_file");
+    my $offsets = $_[1];
+    my $started = 0;
+    my %pfds;
+#    my $totalCalls = 0;
+#    my $totalTicks = 0;
+#    my $pfds = 0;
+    while (<PROFILE_FILE>) {
+        if ($started == 0) {
+            if (m/^0x/) {
+                $started = 1;
+            } else {
+                next;
+            }
+        }
+        my @parts = split(/[[:space:]]+/);
+        if ($parts[0] =~ m/^0x/) {
+            my $callName = get_name($parts[0],$offsets);
+            my $calls = $parts[1];
+            my $ticks = $parts[2];
+            my @pfd = ($calls,$ticks,$callName);
+            if (exists $pfds{$callName}) {
+                my $old_pfd = $pfds{$callName};
+                $pfd[0]+=@$old_pfd[0];
+                $pfd[1]+=@$old_pfd[1];
+            }
+            $pfds{$callName} = \@pfd;
+#            $pfds++;
+#            $totalCalls+=$calls;
+#            $totalTicks+=$ticks;
+        } else {
+            last;
+        }
+
+    }
+    close(PROFILE_FILE);
+#    print("FUNCTIONS\tTOTAL_CALLS\tTOTAL_TICKS\n");
+#    printf("     %4d\t   %8d\t   %8d\n",$pfds,$totalCalls,$totalTicks);
+    return values(%pfds);
+}
+
+# array(array(number,number,string)), number (sort element)
+sub print_sorted {
+    my $pfds = $_[0];
+    my @pfds = @$pfds;
+    my $sort_index = $_[1];
+    my $percent = $_[2];
+    my %elements;
+    my $totalCalls = 0;
+    my $totalTicks = 0;
+    $pfds = 0;
+    foreach $element(@pfds) {
+        $elements{@$element[$sort_index] . @$element[2]} = $element;
+        $pfds++;
+        $totalCalls += @$element[0];
+        $totalTicks += @$element[1];
+    }
+    my @keys = sort(keys(%elements));
+    print("FUNCTIONS\tTOTAL_CALLS\tTOTAL_TICKS\n");
+    printf("     %4d\t   %8d\t   %8d\n",$pfds,$totalCalls,$totalTicks);
+    foreach $key(@keys) {
+        my $element = $elements{$key};
+        if ($percent) {
+            printf("Calls: %7.2f%% Ticks: %7.2f%% Symbol: %s\n",
+                    @$element[0]/$totalCalls*100,
+                    @$element[1]/$totalTicks*100,
+                    @$element[2]);
+        } else {
+            printf("Calls: %08d Ticks: %08d Symbol: %s\n",
+                    @$element);
+        }
+    }
+}
+
+# merges two hashes
+sub merge_hashes {
+    my $hash1 = $_[0];
+    my $hash2 = $_[1];
+    return (%$hash1,%$hash2);
+}
+
+sub usage {
+    if (@_) {
+        print STDERR ("Error: @_\n");
+    }
+    print STDERR ("USAGE:\n");
+    print STDERR ("$0 profile.out map obj[...] [map obj[...]...] sort[...]\n");
+    print STDERR 
+        ("\tprofile.out  output from the profiler, extension is .out\n");
+    print STDERR 
+        ("\tmap          map file, extension is .map\n");
+    print STDERR
+        ("\tobj          library or object file, extension is .a or .o\n");
+    print STDERR
+        ("\tformat       0-2[_p] 0: by calls, 1: by ticks, 2: by name\n");
+    print STDERR
+        ("\t             _p shows percents instead of counts\n");
+    print STDERR ("NOTES:\n");
+    print STDERR
+        ("\tmaps and objects come in sets, one map then many objects\n");
+    exit(1);
+}
+
+
+if ($ARGV[0] =~ m/-(h|help|-help)/) {
+    usage();
+}
+if (@ARGV < 2) {
+    usage("Requires at least 2 arguments");
+}
+if ($ARGV[0] !~ m/\.out$/) {
+    usage("Profile file must end in .out");
+}
+my $i = 1;
+my %symbols;
+{
+    my %map;
+    for (; $i < @ARGV; $i++) {
+        my $file = $ARGV[$i];
+        if ($file =~ m/\.map$/) {
+            %map = read_map($file);
+        } elsif ($file =~ m/\.[ao]$/) {
+            if (!%map) {
+                usage("No map file found before first object file");
+            }
+            my @parts = split(/\//,$file);
+            my %new_symbols = read_library($file,$map{$parts[$#parts]});
+            %symbols = merge_hashes(\%symbols,\%new_symbols);
+        } else {
+            last;
+        }
+    }
+}
+if (!%symbols) {
+    warning("No symbols found");
+}
+my @pfds = create_list($ARGV[0],\%symbols);
+for (; $i < @ARGV; $i++) {
+    print_sorted(\@pfds,split("_",$ARGV[$i]));
+}