From 74764af7403f8f0832a0cecedf4e13e66408ebd9 Mon Sep 17 00:00:00 2001
From: Brendan Gregg <brendan.d.gregg@gmail.com>
Date: Thu, 23 Feb 2017 16:01:47 -0800
Subject: [PATCH] range-perf.pl: add options for different timestamps

---
 range-perf.pl | 121 +++++++++++++++++++++++++++++++++-----------------
 1 file changed, 80 insertions(+), 41 deletions(-)

diff --git a/range-perf.pl b/range-perf.pl
index bfa156a7..0fca6dec 100755
--- a/range-perf.pl
+++ b/range-perf.pl
@@ -28,69 +28,108 @@
 # 21-Feb-2017	Brendan Gregg	Created this.
 
 use strict;
+use Getopt::Long;
+use POSIX 'floor';
 
 sub usage {
 	die <<USAGE_END;
-USAGE: $0 min_seconds max_seconds
+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 $start = $ARGV[0];
+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 $begin = 0;
+my $start = 0;
 my $ok = 0;
-my ($cpu, $ts, $event);
+my $time;
 
 while (1) {
-	# skip comments
-
 	$line = <STDIN>;
 	last unless defined $line;
-	next if $line =~ /^#/;
+	next if $line =~ /^#/;		# skip comments
+
+	if ($line =~ $event_regexp) {
+		my ($ts, $event) = ($1, $2, $3);
+		$start = $ts if $start == 0;
 
-	#
-	# 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$0;::call (/tmp/perf-11936.map)
-	#
-	# stack examples (-g):
-	#
-	# swapper     0 [021] 28648.467059: cpu-clock: 
-	#	ffffffff810013aa xen_hypercall_sched_op ([kernel.kallsyms])
-	#	ffffffff8101cb2f default_idle ([kernel.kallsyms])
-	#	ffffffff8101d406 arch_cpu_idle ([kernel.kallsyms])
-	#	ffffffff810bf475 cpu_startup_entry ([kernel.kallsyms])
-	#	ffffffff81010228 cpu_bringup_and_idle ([kernel.kallsyms])
-	#
-	# java 14375 [022] 28648.467079: cpu-clock: 
-	#	    7f92bdd98965 Ljava/io/OutputStream;::write (/tmp/perf-11936.map)
-	#	    7f8808cae7a8 [unknown] ([unknown])
-	#
-	# swapper     0 [005]  5076.836336: cpu-clock: 
-	#	ffffffff81051586 native_safe_halt ([kernel.kallsyms])
-	#	ffffffff8101db4f default_idle ([kernel.kallsyms])
-	#	ffffffff8101e466 arch_cpu_idle ([kernel.kallsyms])
-	#	ffffffff810c2b31 cpu_startup_entry ([kernel.kallsyms])
-	#	ffffffff810427cd start_secondary ([kernel.kallsyms])
-	#
-	if ($line =~ / \d+ \[(\d+)\] +(\S+): (\S+):/) {
-		($cpu, $ts, $event) = ($1, $2, $3);
-		$begin = $ts if $begin == 0;
+		if ($timezerosecs) {
+			$time = $ts - floor($start);
+		} elsif (!$timeraw) {
+			$time = $ts - $start;
+		} else {
+			$time = $ts;	# raw times
+		}
 
-		my $time = $ts - $begin;
-		$ok = 1 if $time >= $start;
+		$ok = 1 if $time >= $begin;
+		# assume samples are in time order:
 		exit if $time > $end;
 	}