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add concept of execution time to diff #1

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add concept of execution time to diff #1

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27 changes: 24 additions & 3 deletions difffolded.pl
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Original file line number Diff line number Diff line change
Expand Up @@ -58,13 +58,15 @@
# defaults
my $normalize = 0; # make sample counts equal
my $striphex = 0; # strip hex numbers
my $diff = 0; # strip hex numbers

sub usage {
print STDERR <<USAGE_END;
USAGE: $0 [-hns] folded1 folded2 | flamegraph.pl > diff2.svg
-h # help message
-n # normalize sample counts
-s # strip hex numbers (addresses)
-d # diff
See stackcollapse scripts for generating folded files.
Also consider flipping the files and hues to highlight reduced paths:
$0 folded2 folded1 | ./flamegraph.pl --negate > diff1.svg
Expand All @@ -73,11 +75,12 @@ sub usage {
}

usage() if @ARGV < 2;
our($opt_h, $opt_n, $opt_s);
getopts('ns') or usage();
our($opt_h, $opt_n, $opt_s, $opt_d);
getopts('nsd') or usage();
usage() if $opt_h;
$normalize = 1 if defined $opt_n;
$striphex = 1 if defined $opt_s;
$diff = 1 if defined $opt_d;

my ($total1, $total2) = (0, 0);
my %Folded;
Expand All @@ -86,6 +89,7 @@ sub usage {
my $file2 = $ARGV[1];

open FILE, $file1 or die "ERROR: Can't read $file1\n";
my $file1_line = <FILE>;
while (<FILE>) {
chomp;
my ($stack, $count) = (/^(.*)\s+?(\d+(?:\.\d*)?)$/);
Expand All @@ -96,6 +100,7 @@ sub usage {
close FILE;

open FILE, $file2 or die "ERROR: Can't read $file2\n";
my $file2_line = <FILE>;
while (<FILE>) {
chomp;
my ($stack, $count) = (/^(.*)\s+?(\d+(?:\.\d*)?)$/);
Expand All @@ -105,11 +110,27 @@ sub usage {
}
close FILE;

if($diff){
my $timefile1 = (split / /, $file1_line)[1];
my $timefile2 = (split / /, $file2_line)[1];
my $delta = $timefile2 - $timefile1;
print "TIMEDELTA: $delta\n";
} else {
print "$file1_line";
}

foreach my $stack (keys %Folded) {
$Folded{$stack}{1} = 0 unless defined $Folded{$stack}{1};
$Folded{$stack}{2} = 0 unless defined $Folded{$stack}{2};
if ($normalize && $total1 != $total2) {
$Folded{$stack}{1} = int($Folded{$stack}{1} * $total2 / $total1);
}
print "$stack $Folded{$stack}{1} $Folded{$stack}{2}\n";
my $diff_value = $Folded{$stack}{2} - $Folded{$stack}{1};
if (!$diff && $Folded{$stack}{1}){
print "$stack $Folded{$stack}{1} $diff_value\n";
} elsif ($diff && $diff_value) {
my $diff_norm = abs($diff_value);
my $sign = $diff_value > 0 ? 1 : -1;
print "$stack $diff_norm $sign\n";
}
}