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32 results

task_mmu.c

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  • bootgraph.pl 6.28 KiB
    #!/usr/bin/env perl
    
    # Copyright 2008, Intel Corporation
    #
    # This file is part of the Linux kernel
    #
    # This program file is free software; you can redistribute it and/or modify it
    # under the terms of the GNU General Public License as published by the
    # Free Software Foundation; version 2 of the License.
    #
    # 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 in a file named COPYING; if not, write to the
    # Free Software Foundation, Inc.,
    # 51 Franklin Street, Fifth Floor,
    # Boston, MA 02110-1301 USA
    #
    # Authors:
    # 	Arjan van de Ven <arjan@linux.intel.com>
    
    
    #
    # This script turns a dmesg output into a SVG graphic that shows which
    # functions take how much time. You can view SVG graphics with various
    # programs, including Inkscape, The Gimp and Firefox.
    #
    #
    # For this script to work, the kernel needs to be compiled with the
    # CONFIG_PRINTK_TIME configuration option enabled, and with
    # "initcall_debug" passed on the kernel command line.
    #
    # usage:
    # 	dmesg | perl scripts/bootgraph.pl > output.svg
    #
    
    use strict;
    use Getopt::Long;
    my $header = 0;
    
    sub help {
    	my $text = << "EOM";
    Usage:
    1) dmesg | perl scripts/bootgraph.pl [OPTION] > output.svg
    2) perl scripts/bootgraph.pl -h
    
    Options:
    	-header	Insert kernel version and date
    EOM
    	my $std=shift;
    	if ($std == 1) {
    		print STDERR $text;
    	} else {
    		print $text;
    	}
    	exit;
    }
    
    GetOptions(
    	'h|help'	=>\&help,
    	'header'	=>\$header
    );
    
    my %start;
    my %end;
    my %type;
    my $done = 0;
    my $maxtime = 0;
    my $firsttime = 99999;
    my $count = 0;
    my %pids;
    my %pidctr;
    
    my $headerstep = 20;
    my $xheader = 15;
    my $yheader = 25;
    my $cyheader = 0;
    
    while (<>) {
    	my $line = $_;
    	if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z0-9\_\.]+)\+/) {
    		my $func = $2;
    		if ($done == 0) {
    			$start{$func} = $1;
    			$type{$func} = 0;
    			if ($1 < $firsttime) {
    				$firsttime = $1;
    			}
    		}
    		if ($line =~ /\@ ([0-9]+)/) {
    			$pids{$func} = $1;
    		}
    		$count = $count + 1;
    	}
    
    	if ($line =~ /([0-9\.]+)\] async_waiting @ ([0-9]+)/) {
    		my $pid = $2;
    		my $func;
    		if (!defined($pidctr{$pid})) {
    			$func = "wait_" . $pid . "_1";
    			$pidctr{$pid} = 1;
    		} else {
    			$pidctr{$pid} = $pidctr{$pid} + 1;
    			$func = "wait_" . $pid . "_" . $pidctr{$pid};
    		}
    		if ($done == 0) {
    			$start{$func} = $1;
    			$type{$func} = 1;
    			if ($1 < $firsttime) {
    				$firsttime = $1;
    			}
    		}
    		$pids{$func} = $pid;
    		$count = $count + 1;
    	}
    
    	if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) {
    		if ($done == 0) {
    			$end{$2} = $1;
    			$maxtime = $1;
    		}
    	}
    
    	if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
    		my $pid = $2;
    		my $func =  "wait_" . $pid . "_" . $pidctr{$pid};
    		$end{$func} = $1;
    		$maxtime = $1;
    	}
    	if ($line =~ /Write protecting the/) {
    		$done = 1;
    	}
    	if ($line =~ /Freeing unused kernel memory/) {
    		$done = 1;
    	}
    }
    
    if ($count == 0) {
        print STDERR <<END;
    No data found in the dmesg. Make sure that 'printk.time=1' and
    'initcall_debug' are passed on the kernel command line.
    END
    	help(1);
        exit 1;
    }
    
    print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
    print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
    
    
    if ($header) {
    	my $version = `uname -a`;
    	my $date = `date`;
    	print "<text transform=\"translate($xheader,$yheader)\">Kernel version: $version</text>\n";
    	$cyheader = $yheader+$headerstep;
    	print "<text transform=\"translate($xheader,$cyheader)\">Date: $date</text>\n";
    }
    
    my @styles;
    
    $styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    $styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
    
    my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
    
    my $mult = 1950.0 / ($maxtime - $firsttime);
    my $threshold2 = ($maxtime - $firsttime) / 120.0;
    my $threshold = $threshold2/10;
    my $stylecounter = 0;
    my %rows;
    my $rowscount = 1;
    my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
    
    foreach my $key (@initcalls) {
    	my $duration = $end{$key} - $start{$key};
    
    	if ($duration >= $threshold) {
    		my ($s, $s2, $s3, $e, $w, $y, $y2, $style);
    		my $pid = $pids{$key};
    
    		if (!defined($rows{$pid})) {
    			$rows{$pid} = $rowscount;
    			$rowscount = $rowscount + 1;
    		}
    		$s = ($start{$key} - $firsttime) * $mult;
    		$s2 = $s + 6;
    		$s3 = $s + 1;
    		$e = ($end{$key} - $firsttime) * $mult;
    		$w = $e - $s;
    
    		$y = $rows{$pid} * 150;
    		$y2 = $y + 4;
    
    		$style = $styles[$stylecounter];
    		$stylecounter = $stylecounter + 1;
    		if ($stylecounter > 11) {
    			$stylecounter = 0;
    		};
    
    		if ($type{$key} == 1) {
    			$y = $y + 15;
    			print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
    		} else {
    			print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
    			if ($duration >= $threshold2) {
    				print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
    			} else {
    				print "<text transform=\"translate($s3,$y2) rotate(90)\" font-size=\"3pt\">$key</text>\n";
    			}
    		}
    	}
    }
    
    
    # print the time line on top
    my $time = $firsttime;
    my $step = ($maxtime - $firsttime) / 15;
    while ($time < $maxtime) {
    	my $s3 = ($time - $firsttime) * $mult;
    	my $tm = int($time * 100) / 100.0;
    	print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
    	$time = $time + $step;
    }
    
    print "</svg>\n";