gecko/tools/jprof/split-profile.pl

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#!/usr/bin/perl
2012-05-21 04:12:37 -07:00
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
# split-profile.pl Documentation:
#
# This script uses jprof's includes (-i) and excludes (-e) options to
# split profiles into segments. It takes as input a single text file,
# and from that text file creates a series of jprof profiles in the
# directory in which it is run. It expects the application binaries
# with which the profile was made, including jprof, and the jprof
# profile data, to be in a directory called "bin" that is a subdirectory
# of the current directory, and it will output the profiles into the
# current directory.
#
# The input file format looks like the following:
#
# poll g_main_poll
# GetRuleCascade CSSRuleProcessor::GetRuleCascade(nsPresContext *, nsIAtom *)
# RuleProcessorData RuleProcessorData::RuleProcessorData(nsPresContext *, nsIContent *, nsRuleWalker *, nsCompatibility *)
#
# From this input file, the script will construct a profile called
# 00.html that contains the whole profile, a profile called 01-poll.html
# that includes only stacks with g_main_poll, a profile called
# 02-GetRuleCascade.html that includes only stacks that have
# GetRuleCascade and do not have g_main_poll, a profile called
# 03-RuleProcessorData.html that includes only stacks that have the
# RuleProcessorData constructor and do not have GetRuleCascade or
# g_main_poll, and a profile called 04.html that includes only stacks
# that do not have any of the three functions in them.
#
# This means that all of the segments of the profile, except 00.html,
# are mutually exclusive. Thus clever ordering of the functions in the
# input file can lead to a logical splitting of the profile into
# segments.
use strict;
my @names;
my @sigs;
sub read_info($) {
my ($fname) = @_;
open(INFO, "<$fname");
my $i = 0;
while (<INFO>) {
chop;
my $line = $_;
my $idx = index($line, " ");
my $name = substr($line, 0, $idx);
my $sig = substr($line, $idx+1);
$names[$i] = $name;
$sigs[$i] = $sig;
++$i;
}
}
sub run_profile($$) {
my ($options, $outfile) = @_;
print "./jprof$options mozilla-bin jprof-log > ../$outfile.html\n";
system "./jprof$options mozilla-bin jprof-log > ../$outfile.html";
}
sub run_profiles() {
run_profile("", "00");
for (my $i = 0; $i <= $#names + 1; ++$i) {
my $options = "";
for (my $j = 0; $j < $i; ++$j) {
$options .= " -e\"$sigs[$j]\"";
}
if ($i <= $#names) {
$options .= " -i\"$sigs[$i]\"";
}
my $num;
my $n = $i + 1;
if ($n < 10) {
$num = "0$n";
} else {
$num = "$n";
}
if ($i <= $#names) {
run_profile($options, "$num-$names[$i]");
} else {
run_profile($options, "$num");
}
}
}
($#ARGV == 0) || die "Usage: split-profile.pl <info-file>\n";
read_info($ARGV[0]);
chdir "bin" || die "Can't change directory to bin.";
run_profiles();