forked from brendangregg/FlameGraph
-
Notifications
You must be signed in to change notification settings - Fork 1
/
range-perf.pl
executable file
·137 lines (126 loc) · 4.41 KB
/
range-perf.pl
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
#!/usr/bin/perl -w
#
# range-perf Extract a time range from Linux "perf script" output.
#
# USAGE EXAMPLE:
#
# perf record -F 100 -a -- sleep 60
# perf script | ./perf2range.pl 10 20 # range 10 to 20 seconds only
# perf script | ./perf2range.pl 0 0.5 # first half second only
#
# MAKING A SERIES OF FLAME GRAPHS:
#
# Let's say you had the output of "perf script" in a file, out.stacks01, which
# was for a 180 second profile. The following command creates a series of
# flame graphs for each 10 second interval:
#
# for i in `seq 0 10 170`; do cat out.stacks01 | \
# ./perf2range.pl $i $((i + 10)) | ./stackcollapse-perf.pl | \
# grep -v cpu_idle | ./flamegraph.pl --hash --color=java \
# --title="range $i $((i + 10))" > out.range_$i.svg; echo $i done; done
#
# In that example, I used "--color=java" for the Java palette, and excluded
# the idle CPU task. Customize as needed.
#
# Copyright 2017 Netflix, Inc.
# Licensed under the Apache License, Version 2.0 (the "License")
#
# 21-Feb-2017 Brendan Gregg Created this.
use strict;
use Getopt::Long;
use POSIX 'floor';
sub usage {
die <<USAGE_END;
USAGE: $0 [options] min_seconds max_seconds
--timeraw # use raw timestamps from perf
--timezerosecs # time starts at 0 secs, but keep offset from perf
eg,
$0 10 20 # only include samples between 10 and 20 seconds
USAGE_END
}
my $timeraw = 0;
my $timezerosecs = 0;
GetOptions(
'timeraw' => \$timeraw,
'timezerosecs' => \$timezerosecs,
) or usage();
if (@ARGV < 2 || $ARGV[0] eq "-h" || $ARGV[0] eq "--help") {
usage();
exit;
}
my $begin = $ARGV[0];
my $end = $ARGV[1];
#
# Parsing
#
# IP only examples:
#
# java 52025 [026] 99161.926202: cycles:
# java 14341 [016] 252732.474759: cycles: 7f36571947c0 nmethod::is_nmethod() const (/...
# java 14514 [022] 28191.353083: cpu-clock: 7f92b4fdb7d4 Ljava_util_List$size$0;::call (/tmp/perf-11936.map)
# swapper 0 [002] 6035557.056977: 10101010 cpu-clock: ffffffff810013aa xen_hypercall_sched_op+0xa (/lib/modules/4.9-virtual/build/vmlinux)
# bash 25370 603are 6036.991603: 10101010 cpu-clock: 4b931e [unknown] (/bin/bash)
# bash 25370/25370 6036036.799684: cpu-clock: 4b913b [unknown] (/bin/bash)
# other combinations are possible.
#
# Stack examples (-g):
#
# swapper 0 [021] 28648.467059: cpu-clock:
# ffffffff810013aa xen_hypercall_sched_op ([kernel.kallsyms])
# ffffffff8101cb2f default_idle ([kernel.kallsyms])
# ffffffff8101d406 arch_cpu_idle ([kernel.kallsyms])
# ffffffff810bf475 cpu_startup_entry ([kernel.kallsyms])
# ffffffff81010228 cpu_bringup_and_idle ([kernel.kallsyms])
#
# java 14375 [022] 28648.467079: cpu-clock:
# 7f92bdd98965 Ljava/io/OutputStream;::write (/tmp/perf-11936.map)
# 7f8808cae7a8 [unknown] ([unknown])
#
# swapper 0 [005] 5076.836336: cpu-clock:
# ffffffff81051586 native_safe_halt ([kernel.kallsyms])
# ffffffff8101db4f default_idle ([kernel.kallsyms])
# ffffffff8101e466 arch_cpu_idle ([kernel.kallsyms])
# ffffffff810c2b31 cpu_startup_entry ([kernel.kallsyms])
# ffffffff810427cd start_secondary ([kernel.kallsyms])
#
# swapper 0 [002] 6034779.719110: 10101010 cpu-clock:
# 2013aa xen_hypercall_sched_op+0xfe20000a (/lib/modules/4.9-virtual/build/vmlinux)
# a72f0e default_idle+0xfe20001e (/lib/modules/4.9-virtual/build/vmlinux)
# 2392bf arch_cpu_idle+0xfe20000f (/lib/modules/4.9-virtual/build/vmlinux)
# a73333 default_idle_call+0xfe200023 (/lib/modules/4.9-virtual/build/vmlinux)
# 2c91a4 cpu_startup_entry+0xfe2001c4 (/lib/modules/4.9-virtual/build/vmlinux)
# 22b64a cpu_bringup_and_idle+0xfe20002a (/lib/modules/4.9-virtual/build/vmlinux)
#
# bash 25370/25370 6035935.188539: cpu-clock:
# b9218 [unknown] (/bin/bash)
# 2037fe8 [unknown] ([unknown])
# other combinations are possible.
#
# This regexp matches the event line, and puts time in $1, and the event name
# in $2:
#
my $event_regexp = qr/ +([0-9\.]+): *\S* *(\S+):/;
my $line;
my $start = 0;
my $ok = 0;
my $time;
while (1) {
$line = <STDIN>;
last unless defined $line;
next if $line =~ /^#/; # skip comments
if ($line =~ $event_regexp) {
my ($ts, $event) = ($1, $2, $3);
$start = $ts if $start == 0;
if ($timezerosecs) {
$time = $ts - floor($start);
} elsif (!$timeraw) {
$time = $ts - $start;
} else {
$time = $ts; # raw times
}
$ok = 1 if $time >= $begin;
# assume samples are in time order:
exit if $time > $end;
}
print $line if $ok;
}