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executable file 91 lines (80 sloc) 2.611 kB
#!/usr/bin/perl -w
#
# stackcolllapse-perf.pl collapse perf samples into single lines.
#
# Parses a list of multiline stacks generated by "perf script", and
# outputs a comma separated stack followed by a space and a count.
# If memory addresses (+0xd) are present, they are stripped, and resulting
# identical stacks are colased with their counts summed.
#
# USAGE: ./stackcollapse-perf.pl infile > outfile
#
# Example input:
#
# swapper 0 [000] 158665.570607: cpu-clock:
# ffffffff8103ce3b native_safe_halt ([kernel.kallsyms])
# ffffffff8101c6a3 default_idle ([kernel.kallsyms])
# ffffffff81013236 cpu_idle ([kernel.kallsyms])
# ffffffff815bf03e rest_init ([kernel.kallsyms])
# ffffffff81aebbfe start_kernel ([kernel.kallsyms].init.text)
# [...]
#
# Example output:
#
# start_kernel,rest_init,cpu_idle,default_idle,native_safe_halt 1
#
# Input may be created and processed using:
#
# perf record -a -g -F 997 sleep 60
# perf script | ./stackcollapse-perf.pl > out.stacks-folded
#
# Copyright 2012 Joyent, Inc. All rights reserved.
# Copyright 2012 Brendan Gregg. All rights reserved.
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
# 02-Mar-2012 Brendan Gregg Created this.
use strict;
my %collapsed;
sub remember_stack {
my ($stack, $count) = @_;
$collapsed{$stack} += $count;
}
my @stack;
foreach (<>) {
next if m/^#/;
chomp;
if (m/^$/) {
remember_stack(join(",", @stack), 1) if @stack;
undef @stack;
next;
}
# Note the details skipped below, and customize as desired
next if m/:.*:/; # skip summary lines
if (/^\s*\w+ (\w+) (\S+)/) {
my ($func, $mod) = ($1, $2);
next if $func =~ /\(/; # skip process names
next unless $mod =~ /kernel/; # skip non-kernel
unshift @stack, $func;
}
}
foreach my $k (sort { $a cmp $b } keys %collapsed) {
printf "$k $collapsed{$k}\n";
}
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