/
vditest
executable file
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/
vditest
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#!/usr/bin/perl
#
# Copyright (C) 2010 MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version
# 2 as published by the Free Software Foundation.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
use feature 'switch';
use strict;
use Getopt::Std;
use Time::HiRes qw(gettimeofday);
use IPC::Open2;
my $program = "vditest";
my ($vdiname, $vdisize);
my $concurrency = 1;
my $nr_outstanding_aio = 0;
my ($lblk, $hblk) = (512, 1048576);
my $cache = 'writethrough';
my $runtime = 10;
my ($rrate, $wrate) = (100, 0);
my $no_act = 0;
my $offset = 0;
my $seek_pattern = "linear";
my $seed = time();
my ($sblk, $eblk) = (0, 0);
my $file = 0;
my $flush_interval = 0;
my $verbose = 0;
my ($read_test, $write_test) = (0,0);
my $hbeat = 0;
my ($rd_bytes, $wr_bytes, $rd_ops, $wr_ops) = (0, 0, 0, 0);
my ($total_rd_bytes, $total_wr_bytes, $total_rd_ops, $total_wr_ops) = (0, 0, 0, 0);
$/ = 'qemu-io> ';
parse();
print_options();
vdi_open($vdiname, $cache);
vdi_main();
vdi_flush();
vdi_close();
sub get_aligned_blk {
my ($l, $h) = @_;
return $l + 512 * int(rand($h - $l + 512) / 512);
}
sub to_bytes {
my ($size) = @_;
given ($size) {
when (/k(i?b)?$/i) { $size *= 1024; }
when (/m(i?b)?$/i) { $size *= 1024 ** 2; }
when (/g(i?b)?$/i) { $size *= 1024 ** 3; }
}
$_[0] = $size;
}
sub to_str {
my ($size) = @_;
my @units = ("", "K", "M", "G", "T", "P", "E", "Z", "Y");
while ($size >= 1024) {
shift @units;
$size /= 1024;
}
return sprintf "%.1f%s", $size, $units[0];
}
sub print_options {
my $opt = "options: ";
$opt .= "-B $lblk:$hblk ";
$opt .= "-c $cache ";
$opt .= "-C $concurrency ";
$opt .= "-D $rrate:$wrate ";
$opt .= "-n " if $no_act;
$opt .= "-o $offset\n";
$opt .= " ";
$opt .= "-p $seek_pattern ";
$opt .= "-s $seed ";
$opt .= "-S $sblk:$eblk ";
$opt .= "-T $runtime ";
$opt .= "-f $flush_interval\n";
print $opt;
}
sub print_qemu {
my ($cmd) = @_;
print $cmd if $verbose;
print QEMU $cmd if !$no_act;
my $result = <QEMU_OUT>;
if ($verbose) {
$result =~ s/qemu-io> //;
print $result;
}
while ($result =~ /wrote|read/g) {
$nr_outstanding_aio--;
}
}
sub wait_aio_requests {
my $old_sep = $/;
$/ = "\n";
my $result = <QEMU_OUT>;
if ($verbose) {
print $result;
}
while ($result =~ /wrote|read/g) {
$nr_outstanding_aio--;
}
$/ = $old_sep;
}
sub vdi_open {
my ($vdiname, $cache) = @_;
my $cmd;
return if $no_act;
if ($file) {
$cmd = "stdbuf -o0 qemu-io -t $cache $vdiname";
} else {
$cmd = "stdbuf -o0 qemu-io -t $cache sheepdog:$vdiname";
}
open2 *QEMU_OUT, *QEMU, $cmd or die "cannot run qemu-io" if !$no_act;
<QEMU_OUT>;
}
sub vdi_close {
print_qemu("quit\n");
close QEMU if !$no_act;
}
sub vdi_read {
my ($offset, $length) = @_;
print_qemu("aio_read $offset $length\n");
$nr_outstanding_aio++;
$rd_ops++;
$rd_bytes += $length;
$total_rd_ops++;
$total_rd_bytes += $length;
}
sub vdi_write {
my ($offset, $length) = @_;
print_qemu("aio_write $offset $length\n");
$nr_outstanding_aio++;
$wr_ops++;
$wr_bytes += $length;
$total_wr_ops++;
$total_wr_bytes += $length;
}
sub vdi_flush {
print_qemu("aio_flush\n");
}
sub parse_opts {
my %opts = ();
getopts("?B:c:C:D:f:Fh:no:p:rs:S:T:vw", \%opts) or help(1);
foreach my $key (keys %opts) {
my $val = $opts{$key};
given ($key) {
when ('?') {
help(0);
}
when ('B') {
($lblk, $hblk) = ($val =~ /(\d+[kmg]?):?(\d*[kmg]?)/i);
to_bytes($lblk);
to_bytes($hblk);
$hblk = $lblk if $hblk == 0;
die "$lblk is not sector aligned" if $lblk % 512 != 0;
die "$lblk is not valid" if $lblk == 0;
die "$hblk is not sector aligned" if $hblk % 512 != 0;
die "$hblk is too large" if $lblk > (64 * 1024 ** 2);
die "transfer range is invalid" if $lblk > $hblk;
}
when ('c') {
if ($val !~ /(none|write(back|through))/) {
die "'$val' is not valid";
}
$cache = $val;
}
when ('C') {
die "'$val' is not valid" if $val <= 0;
$concurrency = $val;
}
when ('D') {
($rrate, $wrate) = ($val =~ /(\d+)\%?:?(\d*)\%?/);
}
when ('f') {
$flush_interval = $val;
}
when ('F') {
$file = 1;
}
when ('h') {
die "'$val' is not valid" if $val <= 0;
$hbeat = $val;
}
when ('n') {
$no_act = 1;
$verbose = 1;
}
when ('o') {
die "'$val' is not valid" if $val < 0;
$offset = $val;
}
when ('p') {
if ($val =~ /^l/) {
$seek_pattern = "linear";
} elsif ($val =~ /^r/) {
$seek_pattern = "random";
} else {
die "'$val' is not valid";
}
}
when ('r') {
$read_test = 1;
if ($write_test) {
($rrate, $wrate) = (50, 50);
} else {
($rrate, $wrate) = (100, 0);
}
}
when ('s') {
$seed = $val;
}
when ('S') {
($sblk, $eblk) = ($val =~ /(\d+[kmg]?):?(\d*[kmg]?)/i);
to_bytes($sblk);
to_bytes($eblk);
die "$sblk is not sector aligned" if $sblk % 512 != 0;
die "$eblk is not sector aligned" if $eblk % 512 != 0;
}
when ('T') {
die "'$val' is not valid" if $val < 0;
$runtime = $val;
}
when ('v') {
$verbose = 1;
}
when ('w') {
$write_test = 1;
if ($read_test) {
($rrate, $wrate) = (50, 50);
} else {
($rrate, $wrate) = (0, 100);
}
}
}
}
}
sub parse {
parse_opts();
if (@ARGV == 0) {
die "vdiname must be specified";
} else {
$vdiname = shift @ARGV;
# process the rest of options
parse_opts() if (@ARGV > 0);
}
die "too many arguments" if @ARGV > 0;
if ($file) {
$vdisize = `qemu-io -c length $vdiname`;
} else {
$vdisize = `qemu-io -c length sheepdog:$vdiname`;
}
to_bytes($vdisize);
die "cannot get vdi size" if $vdisize == 0;
$eblk = $vdisize if $eblk == 0;
die "test block range is invalid" if $sblk >= $eblk;
die "transfer size is too large" if $hblk > $eblk - $sblk;
}
sub vdi_main {
my $roffset = $offset;
my $woffset = $offset;
my ($cur_time, $start_time, $end_time, $hbeat_time);
$start_time = $cur_time = get_current_time();
$hbeat_time = $start_time + $hbeat * 1000000;
$end_time = $start_time + $runtime * 1000000;
srand($seed);
while ($cur_time < $end_time) {
my $length = get_aligned_blk($lblk, $hblk);
while ($nr_outstanding_aio >= $concurrency) {
wait_aio_requests();
}
if (rand($rrate + $wrate) < $rrate) {
# read
$length = $eblk - $roffset if $roffset + $length > $eblk;
vdi_read($roffset, $length);
if ($seek_pattern eq 'linear') {
$roffset += $length;
$roffset -= $eblk - $sblk while $roffset >= $eblk;
} else {
$roffset = get_aligned_blk($sblk, $eblk - 512);
}
} else {
# write
$length = $eblk - $woffset if $woffset + $length > $eblk;
vdi_write($woffset, $length);
if ($seek_pattern eq 'linear') {
$woffset += $length;
$woffset -= $eblk - $sblk while $woffset >= $eblk;
} else {
$woffset = get_aligned_blk($sblk, $eblk - 512);
}
if ($flush_interval > 0 && $wr_ops % $flush_interval == 0) {
vdi_flush();
}
}
$cur_time = get_current_time();
if ($hbeat > 0 && $hbeat_time <= $cur_time) {
print_result('Heartbeat read', $rd_bytes, $rd_ops, $hbeat) if $rrate;
print_result('Heartbeat write', $wr_bytes, $wr_ops, $hbeat) if $wrate;
$rd_ops = $wr_ops = 0;
$rd_bytes = $wr_bytes = 0;
$hbeat_time += $hbeat * 1000000;
}
}
print_result('Total read', $total_rd_bytes, $total_rd_ops, $runtime) if $rrate;
print_result('Total write', $total_wr_bytes, $total_wr_ops, $runtime) if $wrate;
}
sub get_current_time {
my ($sec, $microsec) = gettimeofday();
return $sec * 1000000 + $microsec;
}
sub print_result {
my ($label, $bytes, $ops, $t) = @_;
printf "$label throughput: %.1fB/s (%s/s), IOPS %.1f/s.\n",
$bytes / $t, to_str($bytes / $t), $ops / $t;
}
sub help {
my ($status) = @_;
print <<END_OF_HELP;
Usage: $program [OPTION] vdiname
-? display this help text and exit.
-B lblk[:hblk] set the block transfer size.
-c cache specify how to use the host cache.
cache is "none", "writeback", or "writethrough".
-C concurrency set the maximum number of concurrent I/O requests
-D r%:w% duty cycle used while reading and/or writing.
-f flush_interval specify that a flush should occur at flush_interval
number of IO operations.
-F vdiname is not a sheepdog vdi but a local file
-h hbeat displays performance statistic every <hbeat> seconds.
-n print events that would occur but do not access disk.
-o offset set the start offset.
-p seek_pattern set the pattern of disk seeks.
seek_pattern is "linear" or "random".
-r read data from vdi.
-s seed set seed for random number generation.
-S sblk[:eblk] set the start [and stop] test block.
-T runtime run until <runtime> seconds have elapsed.
-v verbose mode.
-w write data to vdi.
END_OF_HELP
exit($status);
}