Commit d3f8ddea authored by Arjan van de Ven's avatar Arjan van de Ven Committed by Linus Torvalds
Browse files

bootgraph: make the bootgraph script show async waiting time



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: default avatarArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent fa853a48
...@@ -41,11 +41,13 @@ use strict; ...@@ -41,11 +41,13 @@ use strict;
my %start; my %start;
my %end; my %end;
my %type;
my $done = 0; my $done = 0;
my $maxtime = 0; my $maxtime = 0;
my $firsttime = 100; my $firsttime = 100;
my $count = 0; my $count = 0;
my %pids; my %pids;
my %pidctr;
while (<>) { while (<>) {
my $line = $_; my $line = $_;
...@@ -53,6 +55,7 @@ while (<>) { ...@@ -53,6 +55,7 @@ while (<>) {
my $func = $2; my $func = $2;
if ($done == 0) { if ($done == 0) {
$start{$func} = $1; $start{$func} = $1;
$type{$func} = 0;
if ($1 < $firsttime) { if ($1 < $firsttime) {
$firsttime = $1; $firsttime = $1;
} }
...@@ -63,12 +66,40 @@ while (<>) { ...@@ -63,12 +66,40 @@ while (<>) {
$count = $count + 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 ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_]+)\+.*returned/) {
if ($done == 0) { if ($done == 0) {
$end{$2} = $1; $end{$2} = $1;
$maxtime = $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/) { if ($line =~ /Write protecting the/) {
$done = 1; $done = 1;
} }
...@@ -105,6 +136,8 @@ $styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0 ...@@ -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[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)"; $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 $mult = 1950.0 / ($maxtime - $firsttime);
my $threshold2 = ($maxtime - $firsttime) / 120.0; my $threshold2 = ($maxtime - $firsttime) / 120.0;
my $threshold = $threshold2/10; my $threshold = $threshold2/10;
...@@ -139,11 +172,16 @@ foreach my $key (@initcalls) { ...@@ -139,11 +172,16 @@ foreach my $key (@initcalls) {
$stylecounter = 0; $stylecounter = 0;
}; };
print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n"; if ($type{$key} == 1) {
if ($duration >= $threshold2) { $y = $y + 15;
print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n"; print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
} else { } 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";
}
} }
} }
} }
......
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