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|
#!/usr/bin/perl
#############################################################
#############################################################
##
## Copyright 2001 Sistina Software Inc.
##
## This is free software released under the GNU General
## Public License. There is no warranty for this
## software. See the file COPYING for details.
##
#############################################################
#############################################################
use Getopt::Std;
exit(1) unless getopts('s:f:e:hdqr:l:');
if (defined $opt_h)
{
print << "EndHelp";
Usage: make_panic [OPTION]
-e <iterations> number of iterations, infinite if not defined
-f <forks> number of processes to fork
-h help
-s <seed> seed for random number generator
-d drop seed so you could use it next time
-q Don't print out the status updates. (slient)
-r Number of directories
-l Number of files
EndHelp
exit(0);
}
if (defined $opt_f)
{
$opt_f = 1 if $opt_f <=0;
while (--$opt_f)
{
if ($pid = fork())
{
#parent
}
elsif (defined $pid)
{
last;
}
else
{
die "Fork error $!";
}
}
}
if(defined $opt_s)
{
$seed = $opt_s;
}
else
{
$seed = time ^ $$;
}
if(defined($opt_d))
{
system("echo $seed > /make_panic_seed.$$");
}
srand($seed);
if (defined $opt_r)
{
$dirs = $opt_r;
}
else
{
$dirs = 50;
}
if (defined $opt_l)
{
$files = $opt_l;
}
else
{
$files = 1000;
}
for ($x = 0; $x < $dirs; $x++)
{
mkdir(sprintf("dir%.10u", $x), 0755);
}
$last = time();
$ops_at_last_tick = 0;
while ( (defined $opt_e)?($opt_e-- > 0):1 )
{
$v = int(rand(6));
$x = int(rand($dirs));
$y = int(rand($files));
$file = sprintf("dir%.10u/file%.10u", $x, $y);
if ($v == 0)
{
open(DATAFILE, ">> $file") || die;
close(DATAFILE);
}
elsif ($v == 1 || $v == 2)
{
$z = int(rand(1000000000));
if (open(DATAFILE, "+< $file"))
{
seek(DATAFILE, $z, 0);
print DATAFILE "$z\n";
close(DATAFILE);
}
}
elsif ($v == 3 || $v == 4)
{
$z = int(rand(1000000000));
if (open(DATAFILE, "< $file"))
{
seek(DATAFILE, -100, 2);
read(DATAFILE, $tmp, 100) == 100;
close(DATAFILE);
}
}
elsif ($v == 5)
{
unlink "$file";
}
$ops++;
# if ($ops % 250 == 0)
# {
# $new = time();
# $last-- if ($new == $last);
# $rate = 250 / ($new - $last);
# $pretty_rate = sprintf("%.2f", $rate);
# $last = $new;
# }
$new = time();
if ($new != $last) {
$rate = ($ops - $ops_at_last_tick) / ($new - $last);
$pretty_rate = sprintf("%.2f", $rate);
$ops_at_last_tick = $ops;
$last = $new;
}
if( ! defined $opt_q ) {
print "$ops:$v: $pretty_rate\n";
}
}
|
