diff options
Diffstat (limited to 'hotuser')
| -rwxr-xr-x | hotuser | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/hotuser b/hotuser new file mode 100755 index 000000000000..2377487c7f7b --- /dev/null +++ b/hotuser @@ -0,0 +1,139 @@ +#!/usr/bin/perl -w +# +# hotuser - sample on-CPU user-level functions and libraries. +# Written using Perl and DTrace (Solaris 10 03/05) +# +# This samples the on-CPU function at 1001 Hertz, for a simple yet +# effective user-level profiling tool for sampling exclusive function time. +# The output will identify which function is on the CPU the most - which +# is the hottest. See Notes/ALLexclusive_notes.txt for an explanation of +# exclusive time. +# +# $Id: hotuser 65 2007-10-04 11:09:40Z brendan $ +# +# USAGE: hotuser [-hl] { -c command | -p PID } +# +# -h # help +# -l # match libraries, not functions +# -p PID # examine this PID +# -c command # run and examine this command +# eg, +# hotuser -p 81 # sample user functions from PID 81 +# hotuser -lp 81 # sample user libraries from PID 81 +# hotuser -p `pgrep -n Xorg` # sample Xorg +# +# FIELDS: +# FUNCTION Function name +# LIBRARY Library name +# COUNT Number of samples +# PCNT Percentage of total samples +# +# COPYRIGHT: Copyright (c) 2006 Brendan Gregg. +# +# CDDL HEADER START +# +# The contents of this file are subject to the terms of the +# Common Development and Distribution License, Version 1.0 only +# (the "License"). You may not use this file except in compliance +# with the License. +# +# You can obtain a copy of the license at Docs/cddl1.txt +# or http://www.opensolaris.org/os/licensing. +# See the License for the specific language governing permissions +# and limitations under the License. +# +# CDDL HEADER END +# +# Author: Brendan Gregg [Sydney, Australia] +# +# 29-Jun-2006 Brendan Gregg Created this. +# 29-Jun-2006 " " Last update. +# + +use strict; +use Getopt::Std; + +# +# Command Line Arguments +# +my $args; +usage() if defined $ARGV[0] and $ARGV[0] eq "--help"; +getopts('c:hlp:') or usage(); +usage() if defined $main::opt_h and $main::opt_h; +my $libs = defined $main::opt_l and $main::opt_l ? 1 : 0; +if (defined $main::opt_c) { + $args = "-c $main::opt_c"; +} +elsif (defined $main::opt_p) { + $args = "-p $main::opt_p"; +} +else { + usage(); +} + +# +# Cleanup on signals +# +$SIG{INT} = \&cleanupsig; # Ctrl-C +$SIG{QUIT} = \&cleanupsig; # Ctrl-\ +$SIG{TERM} = \&cleanupsig; # TERM + +# +# Declare DTrace script +# +my $dtrace = <<END; +/usr/sbin/dtrace -n ' + #pragma D option quiet + profile:::profile-1001hz + /pid == \$target/ + { + \@pc[arg1] = count(); + } + dtrace:::END + { + printa("OUT: %A %\@d\\n", \@pc); + } +' '$args' +END + +# +# Run DTrace, process output +# +my %Count; +my $total; +open DTRACE, "$dtrace |" or die "ERROR1: Can't run dtrace (perms?): $!\n"; +print "Sampling... Hit Ctrl-C to end.\n"; +while (my $line = <DTRACE>) { + next if $line =~ /^\s*$/; + next if $line !~ /^OUT: /; + my ($tag, $addr, $count) = split ' ', $line; + my ($name, $offset) = split /\+/, $addr; + next if $name eq "0x0"; + $name =~ s/\`.*// if $libs; + $Count{$name} += $count; + $total += $count; +} +close DTRACE; + +# +# Print final report +# +printf "\n%-52s %8s %6s\n", $libs ? "LIBRARY" : "FUNCTION", "COUNT", "PCNT"; +foreach my $name (sort { $Count{$a} <=> $Count{$b} } keys %Count) { + printf "%-52s %8d %5.1f%%\n", $name, $Count{$name}, + 100 * $Count{$name} / ($total ? $total : 1); +} + +# +# Subroutines +# +sub cleanupsig { +} +sub usage { + print STDERR "USAGE: hotuser [-hl] { -c command | -p PID }\n"; + print STDERR " eg,\n"; + print STDERR " hotuser -p 81 # sample user funcs for PID 81\n"; + print STDERR " hotuser -lp 81 # sample user libs for PID 81\n"; + print STDERR " hotuser -p `pgrep -n Xorg` # sample Xorg\n"; + exit 1; +} |