1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
#!/usr/bin/env perl
#
# SPDX-License-Identifier: GPL-2.0-only
#
# Turns a BUILD_TIME_LOG file into a report.
#
# Usage: build-time-report.pl [-n <count>] [-s <stage>] <logfile>
#
# Wall share is the share of the build duration that a stage is responsible
# for. Each second of the build is divided between the stages that run in it,
# so the wall shares of all stages add up to the busy time. A stage that runs
# alone on an idle machine gets the whole second. Solo time counts only the
# seconds in which a stage is the one thing that runs, so it is the part of
# the build that a faster stage shortens directly.
use strict;
use warnings;
my $top = 20;
my $only_stage;
while (@ARGV && $ARGV[0] =~ /^-/) {
my $opt = shift @ARGV;
if ($opt eq '-n') { $top = shift @ARGV }
elsif ($opt eq '-s') { $only_stage = shift @ARGV }
else { die "Usage: $0 [-n <count>] [-s <stage>] <logfile>\n" }
}
my $file = shift @ARGV or die "Usage: $0 [-n <count>] [-s <stage>] <logfile>\n";
open(my $fh, '<', $file) or die "$0: cannot read $file: $!\n";
my (@iv, %pending);
while (my $line = <$fh>) {
chomp $line;
my ($time, $event, $stage, $name) = split(/\t/, $line, 4);
next unless defined $name;
next unless defined $time && $time =~ /^[0-9]+(\.[0-9]+)?$/;
next if defined $only_stage && $stage ne $only_stage;
my $key = "$stage\t$name";
if ($event eq 'begin') {
push @{$pending{$key}}, $time;
next;
}
next unless $event eq 'end';
my $start = $pending{$key} ? pop @{$pending{$key}} : undef;
next unless defined $start;
push @iv, {
idx => scalar @iv,
start => $start,
end => $time,
dur => $time - $start,
stage => $stage,
name => $name,
share => 0,
solo => 0,
};
}
close($fh);
my $incomplete = 0;
$incomplete += scalar @{$pending{$_}} for keys %pending;
die "$0: no completed stages in $file\n" unless @iv;
my @events;
for my $iv (@iv) {
push @events, [ $iv->{start}, 1, $iv ];
push @events, [ $iv->{end}, 0, $iv ];
}
# An end event sorts before a begin event at the same instant. One stage that
# hands over to the next one must not look like parallel work.
@events = sort { $a->[0] <=> $b->[0] || $a->[1] <=> $b->[1] } @events;
my (%active, $idle, $busy);
$idle = 0;
$busy = 0;
my $prev = $events[0][0];
for my $ev (@events) {
my ($t, $is_start, $iv) = @$ev;
my $dt = $t - $prev;
if ($dt > 0) {
my @cur = values %active;
my $n = scalar @cur;
if (!$n) {
$idle += $dt;
}
else {
$busy += $dt;
my $part = $dt / $n;
$_->{share} += $part for @cur;
$cur[0]->{solo} += $dt if $n == 1;
}
}
if ($is_start) { $active{$iv->{idx}} = $iv }
else { delete $active{$iv->{idx}} }
$prev = $t;
}
my $total = $events[-1][0] - $events[0][0];
my $sum_dur = 0;
$sum_dur += $_->{dur} for @iv;
my (%st, %pkg);
for my $iv (@iv) {
my $s = $st{$iv->{stage}} ||= { count => 0, dur => 0, share => 0, solo => 0 };
$s->{count}++;
$s->{dur} += $iv->{dur};
$s->{share} += $iv->{share};
$s->{solo} += $iv->{solo};
my $key = sprintf("%s [%s]", $iv->{name}, $iv->{stage});
my $p = $pkg{$key} ||= { dur => 0, share => 0, solo => 0 };
$p->{dur} += $iv->{dur};
$p->{share} += $iv->{share};
$p->{solo} += $iv->{solo};
}
sub hms {
my $s = shift;
return sprintf("%d:%02d:%05.2f",
int($s / 3600), int($s / 60) % 60, $s - 60 * int($s / 60));
}
sub pct {
my ($a, $b) = @_;
return $b > 0 ? 100 * $a / $b : 0;
}
printf "build window %s\n", hms($total);
printf "busy %s (%.1f%%)\n", hms($busy), pct($busy, $total);
printf "idle %s (%.1f%%)\n", hms($idle), pct($idle, $total);
printf "stage time %s\n", hms($sum_dur);
printf "mean parallelism %.2f\n", $busy > 0 ? $sum_dur / $busy : 0;
printf "stages completed %d\n", scalar @iv;
printf "stages unfinished %d\n", $incomplete if $incomplete;
print "\n";
printf "%-10s %6s %12s %12s %8s %12s %8s\n",
'stage', 'count', 'sum', 'wall share', 'of wall', 'solo', 'of wall';
for my $name (sort { $st{$b}{share} <=> $st{$a}{share} } keys %st) {
my $s = $st{$name};
printf "%-10s %6d %12s %12s %7.1f%% %12s %7.1f%%\n",
$name, $s->{count}, hms($s->{dur}), hms($s->{share}),
pct($s->{share}, $total), hms($s->{solo}), pct($s->{solo}, $total);
}
sub table {
my ($title, $key, $ref) = @_;
print "\n$title\n";
printf "%-56s %12s %12s %12s\n", 'stage', 'duration', 'wall share', 'solo';
my @k = sort { $ref->{$b}{$key} <=> $ref->{$a}{$key} } keys %$ref;
splice(@k, $top) if @k > $top;
for my $name (@k) {
my $e = $ref->{$name};
printf "%-56s %12s %12s %12s\n",
$name, hms($e->{dur}), hms($e->{share}), hms($e->{solo});
}
}
table("top $top by wall share", 'share', \%pkg);
table("top $top by solo time", 'solo', \%pkg);
table("top $top by duration", 'dur', \%pkg);
|
