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75 lines
2.6 KiB
Perl
Executable File
75 lines
2.6 KiB
Perl
Executable File
#!/usr/bin/env perl
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#
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# Copyright (c) 2014 Ed Maste. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# stackcollapse-pmc.pl collapse hwpmc samples into single lines.
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#
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# Parses a list of multiline stacks generated by "hwpmc -G", and outputs a
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# semicolon-separated stack followed by a space and a count.
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#
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# Usage:
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# pmcstat -S unhalted-cycles -O pmc.out
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# pmcstat -R pmc.out -z16 -G pmc.graph
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# stackcollapse-pmc.pl pmc.graph > pmc.stack
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#
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# Example input:
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#
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# 03.07% [17] witness_unlock @ /boot/kernel/kernel
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# 70.59% [12] __mtx_unlock_flags
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# 16.67% [2] selfdfree
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# 100.0% [2] sys_poll
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# 100.0% [2] amd64_syscall
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# 08.33% [1] pmap_ts_referenced
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# 100.0% [1] vm_pageout
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# 100.0% [1] fork_exit
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# ...
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#
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# Example output:
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#
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# amd64_syscall;sys_poll;selfdfree;__mtx_unlock_flags;witness_unlock 2
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# amd64_syscall;sys_poll;pmap_ts_referenced;__mtx_unlock_flagsgeout;fork_exit 1
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# ...
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use warnings;
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use strict;
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my @stack;
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my $prev_count;
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my $prev_indent = -1;
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while (defined($_ = <>)) {
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if (m/^( *)[0-9.]+% \[([0-9]+)\]\s*(\S+)/) {
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my $indent = length($1);
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if ($indent <= $prev_indent) {
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print join(';', reverse(@stack[0 .. $prev_indent])) .
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" $prev_count\n";
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}
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$stack[$indent] = $3;
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$prev_count = $2;
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$prev_indent = $indent;
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}
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}
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print join(';', reverse(@stack[0 .. $prev_indent])) . " $prev_count\n";
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