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|
#!/usr/bin/perl -w
#
# Author: Jue Ruan <ruanjue@gmail.com>
#
use strict;
use warnings;
use POSIX;
use POSIX ":sys_wait_h";
use Time::HiRes;
my $USER = $ENV{USER};
if(not defined $USER){
$USER = `whoami`;
chomp $USER;
}
my $RUNITALL = $ENV{RUNIT_ALL} || 0;
my $cmd = join(" ", @ARGV);
$cmd=~s/^\s+//;
$cmd=~s/\s+$//;
&usage unless($cmd);
my $pagesize = POSIX::sysconf(POSIX::_SC_PAGESIZE);
my $sleep_inv = 1000000; # in mircoseconds
my $maxram = 0; # kb
my $maxcpu = 0;
my $retval = 0;
my $utime = 0;
my $stime = 0;
my $rtime = 0;
my $maxrss = 0;
my $maxvsz = 0;
my %exclusive = ();
if($RUNITALL){
for my $proc (&get_all_process()){
$exclusive{$proc->[0]} = 1;
}
}
my %procs = ();
&get_linux_sys_info();
print STDERR " --------------------------------------------------------------------------------\n";
print STDERR " -- runit.pl is a program launcher and minitor written by Jue Ruan <ruanjue\@gmail.com>\n";
print STDERR " -- RAM : $maxram kB\n";
print STDERR " -- CPU : $maxcpu cores\n";
print STDERR " -- SYS : ", `uname -a`;
print STDERR " -- USER: $USER\n";
print STDERR " -- DATE: ", `date`;
print STDERR " -- PWD : ", `pwd`;
print STDERR " -- CMD : $cmd\n";
print STDERR " --------------------------------------------------------------------------------\n";
my $PID = open(READ, "$cmd |") or die("Cannot invoke commands: $!");
my $begtime = Time::HiRes::time;
if(fork() == 0){
while(<READ>){
print;
}
exit;
}
while(1){
my $mrss = 0;
my $mvsz = 0;
foreach my $proc (&get_all_process()){
my ($pid, $cm, $ppid) = @{$proc};
next if($exclusive{$pid});
my ($fail, $ut, $st, $rss, $vsz) = &get_linux_proc_info($pid);
next if($fail);
if(exists $procs{$pid}){
$procs{$pid}[0] = $ut;
$procs{$pid}[1] = $st;
} else {
print STDERR " -- RUNIT PID($pid): $ppid\t$cm\n";
$procs{$pid} = [$ut, $st, $cm, $ppid];
}
$mrss += $rss;
$mvsz += $vsz;
}
#print STDERR "$mrss\t$mvsz\n";
$maxrss = $mrss if($mrss > $maxrss);
$maxvsz = $mvsz if($mvsz > $maxvsz);
my $res = waitpid($PID, WNOHANG);
if($res == -1){
print STDERR " ** Error ", ($? >> 8), "\n";
last;
} elsif($res){
$retval = $? >> 8;
last;
} else {
Time::HiRes::usleep($sleep_inv);
}
}
my $endtime = Time::HiRes::time;
$rtime = $endtime - $begtime;
foreach my $pid (sort {$a <=> $b} keys %procs){
next if($exclusive{$pid});
print STDERR " -- STAT PID($pid): $procs{$pid}[3]\t$procs{$pid}[0]\t$procs{$pid}[1]\t$procs{$pid}[2]\n";
$utime += $procs{$pid}[0];
$stime += $procs{$pid}[1];
}
print STDERR " --------------------------------------------------------------------------------\n";
printf STDERR " -- retval %16d\n", $retval;
printf STDERR " -- real %16.3f\n", $rtime;
printf STDERR " -- user %16.3f\n", $utime;
printf STDERR " -- sys %16.3f\n", $stime;
printf STDERR " -- maxrss %16.3f kB\n", $maxrss;
printf STDERR " -- maxvsz %16.3f kB\n", $maxvsz;
print STDERR " --------------------------------------------------------------------------------\n";
1;
sub usage {
print qq{Launch program and minitor the cputime and ram usage of it and its childs\n};
print qq{Usage: $0 \$'commands'\n};
exit 1;
}
sub get_linux_sys_info {
open(IN, "/proc/meminfo") or die;
while(<IN>){
my @ts = split;
if($ts[0]=~/^MemTotal/){
$maxram = $ts[1];
last;
}
}
close IN;
open(IN, "/proc/cpuinfo") or die;
$maxcpu = 0;
while(<IN>){
if(/^processor/){
$maxcpu ++;
}
}
close IN;
}
sub get_all_process {
my %ps = ();
my @pids = ();
if(my $psid = open(IN, "ps -o ppid,pid,cmd --no-headers --user $USER 2>/dev/null |")){
while(<IN>){
chomp;
my @ts = split /\s+/, $_, 3;
next if($ts[1] == $psid);
if($RUNITALL){
push(@pids, [$ts[1], $ts[2], $ts[0]]);
} else {
$ps{$ts[1]}[0] = $ts[2];
$ps{$ts[1]}[1] = $ts[0];
$ps{$ts[1]}[2] = [] if(not defined $ps{$ts[1]}[2]);
push(@{$ps{$ts[0]}[2]}, $ts[1]);
}
}
close IN;
}
if($RUNITALL){
} else {
my @stack = ($PID);
while(@stack){
my $pid = pop @stack;
next unless(exists $ps{$pid});
my $p = $ps{$pid};
push(@pids, [$pid, $p->[0], $p->[1]]);
push(@stack, @{$p->[2]});
}
}
return @pids;
}
sub get_linux_proc_info {
my $pid = shift;
my ($fail, $ut, $st, $rss, $vsz);
if(open(IN, "/proc/$pid/stat")){
if($_ = <IN>){
my @ts = split /\s/, $_;
#print STDERR join("|", @ts), "\n";
#for(my $i=0;$i<@ts;$i++){
# print STDERR ($i+1), "\t", $ts[$i], "\n";
#}
$ut = $ts[13] / 100;
$st = $ts[14] / 100;
$vsz = $ts[22] / 1024;
$rss = $ts[23] * $pagesize / 1024;
$fail = 0;
} else {
$fail = 1;
}
close IN;
} else {
$fail = 1;
}
if($fail){
print STDERR " ** FAIL STAT($pid)\n";
}
return ($fail, $ut, $st, $rss, $vsz);
}
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