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dfbdaa28a5
Introduce `--profile` support to the benchmark helper script, which will invoke `perf` on Linux. Additionally, add a `--flamegraph` output option based on that.
110 lines
2.8 KiB
Perl
Executable File
110 lines
2.8 KiB
Perl
Executable File
#!/usr/bin/perl -w
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#
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# stackcollapse.pl collapse multiline stacks into single lines.
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#
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# Parses a multiline stack followed by a number on a separate line, and
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# outputs a semicolon separated stack followed by a space and the number.
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# If memory addresses (+0xd) are present, they are stripped, and resulting
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# identical stacks are colased with their counts summed.
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#
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# USAGE: ./stackcollapse.pl infile > outfile
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#
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# Example input:
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#
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# unix`i86_mwait+0xd
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# unix`cpu_idle_mwait+0xf1
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# unix`idle+0x114
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# unix`thread_start+0x8
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# 1641
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#
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# Example output:
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#
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# unix`thread_start;unix`idle;unix`cpu_idle_mwait;unix`i86_mwait 1641
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#
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# Input may contain many stacks, and can be generated using DTrace. The
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# first few lines of input are skipped (see $headerlines).
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#
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# Copyright 2011 Joyent, Inc. All rights reserved.
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# Copyright 2011 Brendan Gregg. All rights reserved.
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#
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# CDDL HEADER START
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#
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# The contents of this file are subject to the terms of the
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# Common Development and Distribution License (the "License").
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# You may not use this file except in compliance with the License.
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#
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# You can obtain a copy of the license at docs/cddl1.txt or
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# http://opensource.org/licenses/CDDL-1.0.
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# See the License for the specific language governing permissions
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# and limitations under the License.
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#
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# When distributing Covered Code, include this CDDL HEADER in each
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# file and include the License file at docs/cddl1.txt.
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# If applicable, add the following below this CDDL HEADER, with the
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# fields enclosed by brackets "[]" replaced with your own identifying
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# information: Portions Copyright [yyyy] [name of copyright owner]
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#
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# CDDL HEADER END
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#
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# 14-Aug-2011 Brendan Gregg Created this.
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use strict;
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my $headerlines = 3; # number of input lines to skip
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my $includeoffset = 0; # include function offset (except leafs)
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my %collapsed;
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sub remember_stack {
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my ($stack, $count) = @_;
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$collapsed{$stack} += $count;
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}
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my $nr = 0;
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my @stack;
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foreach (<>) {
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next if $nr++ < $headerlines;
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chomp;
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if (m/^\s*(\d+)+$/) {
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my $count = $1;
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my $joined = join(";", @stack);
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# trim leaf offset if these were retained:
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$joined =~ s/\+[^+]*$// if $includeoffset;
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remember_stack($joined, $count);
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@stack = ();
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next;
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}
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next if (m/^\s*$/);
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my $frame = $_;
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$frame =~ s/^\s*//;
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$frame =~ s/\+[^+]*$// unless $includeoffset;
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# Remove arguments from C++ function names:
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$frame =~ s/(::.*)[(<].*/$1/;
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$frame = "-" if $frame eq "";
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my @inline;
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for (split /\->/, $frame) {
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my $func = $_;
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# Strip out L and ; included in java stacks
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$func =~ tr/\;/:/;
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$func =~ s/^L//;
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$func .= "_[i]" if scalar(@inline) > 0; #inlined
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push @inline, $func;
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}
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unshift @stack, @inline;
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}
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foreach my $k (sort { $a cmp $b } keys %collapsed) {
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print "$k $collapsed{$k}\n";
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}
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