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#!/usr/bin/perl
# Copyright (C) - 2012 Christian Babeux <christian.babeux@efficios.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License, version 2 only, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
use strict;
use warnings;
use Getopt::Long;
my $opt_tracepoint;
GetOptions('tracepoint=s' => \$opt_tracepoint)
or die("Invalid command-line option\n");
defined($opt_tracepoint)
or die("Missing tracepoint, use --tracepoint <name>");
# Parse an array string.
# The format is as follow: [ [index] = value, ... ]
sub parse_array
{
my ($arr_str) = @_;
my @array = ();
# Strip leading and ending brackets, remove whitespace
$arr_str =~ s/^\[//;
$arr_str =~ s/\]$//;
$arr_str =~ s/\s//g;
my @entries = split(',', $arr_str);
foreach my $entry (@entries) {
if ($entry =~ /^\[(\d+)\]=(\d+)$/) {
my $index = $1;
my $value = $2;
splice @array, $index, 0, $value;
}
}
return \@array;
}
# Parse fields values.
# Format can either be a name = array or a name = value pair.
sub parse_fields
{
my ($fields_str) = @_;
my %fields_hash;
my $field_name = '[\w\d_]+';
my $field_value = '[\w\d_\\\*"]+';
my $array = '\[(?:\s\[\d+\]\s=\s\d+,)*\s\[\d+\]\s=\s\d+\s\]';
# Split the various fields
my @fields = ($fields_str =~ /$field_name\s=\s(?:$array|$field_value)/g);
foreach my $field (@fields) {
if ($field =~ /($field_name)\s=\s($array)/) {
my $name = $1;
my $value = parse_array($2);
$fields_hash{$name} = $value;
}
if ($field =~ /($field_name)\s=\s($field_value)/) {
my $name = $1;
my $value = $2;
$fields_hash{$name} = $value;
}
}
return \%fields_hash;
}
# Using an event array, merge all the fields
# of a particular tracepoint.
sub merge_fields
{
my ($events_ref) = @_;
my %merged;
foreach my $event (@{$events_ref}) {
my $tp_provider = $event->{'tp_provider'};
my $tp_name = $event->{'tp_name'};
my $tracepoint = "$tp_provider:$tp_name";
foreach my $key (keys %{$event->{'fields'}}) {
my $val = $event->{'fields'}->{$key};
# TODO: Merge of array is not implemented.
next if (ref($val) eq 'ARRAY');
$merged{$tracepoint}{$key}{$val} = undef;
}
}
return \%merged;
}
# Print the minimum and maximum of each fields
# for a particular tracepoint.
sub print_fields_stats
{
my ($merged_ref, $tracepoint) = @_;
return unless ($tracepoint && exists $merged_ref->{$tracepoint});
foreach my $field (keys %{$merged_ref->{$tracepoint}}) {
my @sorted;
my @val = keys ($merged_ref->{$tracepoint}->{$field});
if ($val[0] =~ /^\d+$/) {
# Sort numerically
@sorted = sort { $a <=> $b } @val;
} elsif ($val[0] =~ /^0x[\da-f]+$/i) {
# Convert the hex values and sort numerically
@sorted = sort { hex($a) <=> hex($b) } @val;
} else {
# Fallback, alphabetical sort
@sorted = sort { lc($a) cmp lc($b) } @val;
}
my $min = $sorted[0];
my $max = $sorted[-1];
print "$field $min $max\n";
}
}
my @events;
while (<>)
{
my $timestamp = '\[(.*)\]';
my $elapsed = '\((.*)\)';
my $hostname = '.*';
my $pname = '.*';
my $pinfo = '.*';
my $pid = '\d+';
my $tp_provider = '.*';
my $tp_name = '.*';
my $cpu_info = '{\scpu_id\s=\s(\d+)\s\}';
my $fields = '{(.*)}';
# Parse babeltrace text output format
if (/$timestamp\s$elapsed\s($pinfo)\s($tp_provider):($tp_name):\s$cpu_info,\s$fields/) {
my %event_hash;
$event_hash{'timestamp'} = $1;
$event_hash{'elapsed'} = $2;
$event_hash{'pinfo'} = $3;
# my @split_pinfo = split(':', $3);
# $event_hash{'hostname'} = $split_pinfo[0];
# $event_hash{'pname'} = defined($split_pinfo[1]) ? $split_pinfo[1] : undef;
# $event_hash{'pid'} = defined($split_pinfo[2]) ? $split_pinfo[2] : undef;
$event_hash{'tp_provider'} = $4;
$event_hash{'tp_name'} = $5;
$event_hash{'cpu_id'} = $6;
$event_hash{'fields'} = parse_fields($7);
push @events, \%event_hash;
}
}
my %merged_fields = %{merge_fields(\@{events})};
print_fields_stats(\%merged_fields, $opt_tracepoint);
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