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#!/usr/bin/perl
# Notes ... -B 1 == 8k
if(@ARGV > 1) {
if($ARGV[0] eq "-B") {
$buffers = $ARGV[1];
}
}
if($buffers > 0) {
$kb_memory_required = $buffers * 8;
}
$shm = `sysctl kern.ipc | grep shmall`;
( $junk, $shm_amt ) = split(/ /, $shm);
chomp($shm_amt);
$sem = `sysctl kern.ipc | grep semmap`;
print "\n\n";
if(length($shm) > 0) {
printf "shared memory enabled: %d kB available\n", $shm_amt * 4;
if($buffers > 0) {
if($kb_memory_required / 4 > $shm_amt) {
print "\n";
print "to provide enough shared memory for a \"-B $buffers\" setting\n";
print "issue the following command\n\n";
printf "\tsysctl -w kern.ipc.shmall=%d\n", $kb_memory_required / 4;
print "\nand add the following to your /etc/sysctl.conf file:\n\n";
printf "\tkern.ipc.shmall=%d\n", $kb_memory_required / 4;
} else {
print "\n";
print "no changes to kernel required for a \"-B $buffers\" setting\n";
}
}
} else {
print "no shared memory support available\n";
print "add the following option to your kernel config:\n\n";
print "\toptions SYSVSHM\n\n";
}
print "\n==========================\n\n";
if(length($sem) > 0) {
print "semaphores enabled\n";
} else {
print "no semaphore support available\n";
print "add the following option to your kernel config:\n\n";
print "\toptions SYSVSEM\n\n";
}
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