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bootgraph: make the bootgraph script show async waiting time

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It is useful for diagnosing boot performance to see where async function
calls are waiting on serialization...  this patch adds this
functionality to the bootgraph.pl script.

The waiting time is shown as a half transparent, gray bar through the
block that is waiting.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arjan van de Ven 2009-01-10 10:03:05 -08:00 committed by Linus Torvalds
parent fa853a4841
commit d3f8ddea44
1 changed files with 42 additions and 4 deletions
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46
scripts/bootgraph.pl
View file

@ -41,11 +41,13 @@ use strict;
my %start;
my %end;
my %type;
my $done = 0;
my $maxtime = 0;
my $firsttime = 100;
my $count = 0;
my %pids;
my %pidctr;
while (<>) {
my $line = $_;
@ -53,6 +55,7 @@ while (<>) {
my $func = $2;
if ($done == 0) {
$start{$func} = $1;
$type{$func} = 0;
if ($1 < $firsttime) {
$firsttime = $1;
}
@ -63,12 +66,40 @@ while (<>) {
$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;
}
@ -105,6 +136,8 @@ $styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(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;
@ -139,11 +172,16 @@ foreach my $key (@initcalls) {
$stylecounter = 0;
};
print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
if ($duration >= $threshold2) {
print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
if ($type{$key} == 1) {
$y = $y + 15;
print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
} else {
print "<text transform=\"translate($s3,$y2) rotate(90)\" font-size=\"3pt\">$key</text>\n";
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";
}
}
}
}