62 lines
1.6 KiB
Perl
Executable File
62 lines
1.6 KiB
Perl
Executable File
#!/bin/perl
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use strict;
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use warnings;
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use Data::Dumper;
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use Getopt::Long;
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my ( $mode, $stack, $source, $line, $time, $prev_time, $diff );
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GetOptions(
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"mode|m=s" => sub {
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( undef, $mode ) = @_;
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}
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);
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foreach (<>) {
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chomp;
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my ( @trace, @line );
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# trapdebug find_be_kernels populate_be_list main;/lib/profiling-lib.sh /lib/zfsbootmenu-core.sh /lib/zfsbootmenu-lib.sh /bin/zfsbootmenu;734 641 85 0;1695169626.438117
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@line = split( /;/, $_ );
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my @sstack = split( / /, $line[0] );
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my @ssource = split( / /, $line[1] );
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my @slineno = split( / /, $line[2] );
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$time = $line[3];
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# the first line is free, there are no previous timestamps to use
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$prev_time //= $time;
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if ( $mode =~ m/chart/ ) {
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# Start at 1, removing trapdebug from the stack
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foreach my $i ( 1 .. $#sstack ) {
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unshift( @trace, "$sstack[$i]\@$ssource[$i]#$slineno[$i]" );
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}
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}
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elsif ( $mode =~ m/graph/ ) {
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# Start at 1, removing trapdebug from the stack
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foreach my $i ( 1 .. $#sstack ) {
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unshift( @trace, "$sstack[$i]\@$ssource[$i]" );
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}
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}
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$stack = join( ';', @trace );
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# reset prev_time to make this a no-op
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# time spent sourcing the unguarded library is unknowable to flamegraph.pl
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if ( $stack =~ m,source@/lib/profiling-lib.sh, ) {
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$prev_time = $time;
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}
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# flamegraph doesn't care about units, but it does round non-integers to the nearest integer
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# prefer microsecond precision so that we have sub-ms granularity
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$diff = int( ( ( $time - $prev_time ) * 1000000 ) + 1 / 2 );
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$prev_time = $time;
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print "$stack $diff\n";
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}
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