swapout: Use random 1MB to avoid RAM compression.
This commit is contained in:
Ole Tange
parent
1209cfbbb8
commit
b1bb72c63b
10
drac/drac
10
drac/drac
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@ -17,7 +17,7 @@ B<drac> [[I<user>[:I<password>]@]I<host>]
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iDRAC6 uses a Java program to show the virtual console.
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From the iDRAC6 B<drac> downloads the .jar file that is used to
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connect to the iDRAC6's virtual console. Then it runs it with Java.
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connect to the virtual console of iDRAC6. Then it runs it with Java.
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=head1 OPTIONS
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@ -92,12 +92,12 @@ B<drac> uses B<java>.
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B<java>
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'
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=cut
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read host user passwd < <(echo "$1" |
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# parse [[user[:pass]@]host]
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perl -pe 's/^(?:(.*?)(?::(.*?))?@)?(.*?)$/$3 $1 $2/')
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# Set default values
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if [ "$user" = "" ] ; then
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DRAC_USER=${DRAC_USER:-root}
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else
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@ -114,8 +114,9 @@ else
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DRAC_HOST="$host"
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fi
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tmp=`tempfile`
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tmp=$(tempfile)
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# Find a command line tool to download with
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get=$(
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(lynx -source /dev/null && echo lynx -source) ||
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(fetch -o /dev/null file:///bin/sh && echo fetch -o -) ||
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@ -124,6 +125,7 @@ get=$(
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echo 'No lynx, wget, curl, fetch: Please file a bug report with which tool you use for downloading URLs' >&2
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)
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# Use http instead of https to avoid dealing with self signed cert
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$get http://"$DRAC_HOST"/software/avctKVM.jar > "$tmp"
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(
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@ -1,9 +1,11 @@
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#!/usr/bin/perl
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$timeout = shift || 10;
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use strict;
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my $giga=2**30;
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my $forks=1;
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my $timeout = shift || 10;
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my $giga = 2**30;
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my $forks = 1;
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my $free;
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@ -11,10 +13,13 @@ my $memtotal = int(
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qx{ awk '/^(MemTotal):/ { sum += \$2} END { print sum }' /proc/meminfo }
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/ 1024);
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$total = 1;
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$onemb = "x"x1048576;
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do{
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$start = time;
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my $total = 1;
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# 1 MB random data so it is not compressed
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my $onemb = pack("L*", map { rand(2**32) } 1..(2**18));
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my ($missing, $sofar,$timediff, %buf, $pid,$shift);
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do {
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my $start = time;
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$free = int (
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qx{ awk '/^((Swap)?Cached|MemFree|Buffers):/ { sum += \$2} END { print sum }' /proc/meminfo }
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/ 1024);
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@ -26,21 +31,22 @@ do{
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$total += int($free/100);
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$missing = $total - $sofar;
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for(1..$missing) {
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$buf{$forks}{$total}{$_} = $onemb;
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# Shift every block 1 byte, so no blocks have the same content
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$buf{$forks}{$total}{$_} = "x"x(++$shift) . $onemb;
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}
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$sofar = $total;
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$timediff = time - $start;
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print "Chunk size: $missing Time for swapping: $timediff seconds. Total memory used: $total\n";
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if($total * 1048576 > $forks * $giga) {
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if($pid=fork()) {
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if($pid = fork()) {
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print "child spawn ",$forks,"\n";
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wait;
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print "child exit ",$forks,"\n";
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} else {
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$buf{$forks}=1;
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$buf{$forks} = 1;
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$forks++;
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}
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}
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} until ($pid or $timediff>$timeout or $total > $memtotal);
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} until ($pid or $timediff > $timeout or $total > $memtotal);
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print "exit ",$forks,"\n";
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@ -1,4 +1,4 @@
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#!/usr/bin/perl
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#!/usr/bin/perl -w
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=pod
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@ -44,8 +44,8 @@ Instead of overwriting I<file>, append to I<file>.
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=head1 EXAMPLES
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(sleep 0.5; echo After 0.5s; sleep 1.5; echo After 2s) | teetime myfile
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(sleep 0.5; echo After 2.5s; sleep 1.5; echo After 4s) | teetime -a myfile
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(sleep 0.5; echo After 0.5s; sleep 1.5) | teetime myfile
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(sleep 0.5; echo After 2.5s; sleep 1.5) | teetime -a myfile
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teetime -i myfile
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=head1 AUTHOR
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@ -84,6 +84,8 @@ B<tee>
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=cut
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use strict;
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use Getopt::Long;
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sub now {
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@ -110,18 +112,19 @@ sub readstdin {
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my $rin = '';
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my $in;
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my $twogb = 2**31;
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my ($read, $time, $delta);
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open(my $fh, ($opt::append ? ">>" : ">"), $file) || die;
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vec($rin, fileno(STDIN), 1) = 1;
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while(1) {
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select($rin,undef,undef,undef);
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if(sysread(STDIN,$in,$twogb)) {
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my $time = now();
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my $delta = $time - $last_time;
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print $fh pack("L*",$delta,length $in),$in;
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print STDOUT $in;
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$last_time = $time;
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} else {
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$read = sysread(STDIN,$in,$twogb);
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$time = now();
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$delta = $time - $last_time;
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print $fh pack("L*",$delta,length $in),$in;
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print STDOUT $in;
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$last_time = $time;
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if(not $read) {
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# Select says there is something to read,
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# but there is not => eof
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last;
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@ -136,7 +139,7 @@ sub readfile {
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while(1) {
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my $in;
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if(sysread($fh,$in,8)) {
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($delta,$length) = unpack("L*",$in);
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my ($delta,$length) = unpack("L*",$in);
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select(undef,undef,undef,$delta/1000);
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sysread($fh,$in,$length);
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print $in;
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@ -179,6 +182,15 @@ sub help() {
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"",);
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}
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sub debug {
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$opt::D or return;
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@_ = grep { defined $_ ? $_ : "" } @_;
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if($opt::D eq "all" or $opt::D eq $_[0]) {
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print @_[1..$#_];
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}
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}
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$|=1;
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$Global::progname = "teetime";
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$Global::version = "20200721";
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@ -32,7 +32,7 @@ Contact Ole Tange <ole@tange.dk>.
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=head1 AUTHOR
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Copyright (C) 2012 Ole Tange <ole@tange.dk>.
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Copyright (C) 2014-2020 Ole Tange <ole@tange.dk>.
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=head1 LICENSE
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@ -65,6 +65,7 @@ B<ssh>(1)
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=cut
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use Getopt::Long;
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Getopt::Long::Configure("bundling","require_order");
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my @argv = @ARGV;
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get_options_from_array(\@ARGV,[]);
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