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live migration: reduce sleep when remaining memory is low

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Reduce sleep to 0.3s when remaining memory is lower than the average transfert in 1 iteration.

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
This commit is contained in:
Alexandre Derumier 2012-08-21 12:21:54 +02:00 committed by Dietmar Maurer
parent f5eb281ad3
commit e52bd94c7e
1 changed files with 10 additions and 2 deletions
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10
PVE/QemuMigrate.pm
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@ -9,6 +9,7 @@ use PVE::INotify;
use PVE::Cluster;
use PVE::Storage;
use PVE::QemuServer;
use Time::HiRes qw( usleep );
use base qw(PVE::AbstractMigrate);
@ -330,8 +331,13 @@ sub phase2 {
my $merr = $@;
my $lstat = 0;
my $usleep = 2000000;
my $i = 0;
while (1) {
sleep (2);
$i++;
my $avglstat = $lstat/$i if $lstat;
usleep ($usleep);
my $stat = PVE::QemuServer::vm_mon_cmd_nocheck($vmid, "query-migrate");
if ($stat->{status} =~ m/^(active|completed|failed|cancelled)$/im) {
$merr = undef;
@ -357,6 +363,8 @@ sub phase2 {
my $trans = $stat->{ram}->{transferred} || 0;
my $rem = $stat->{ram}->{remaining} || 0;
my $total = $stat->{ram}->{total} || 0;
#reduce sleep if remainig memory if lower than the everage transfert
$usleep = 300000 if $rem < $avglstat;
$self->log('info', "migration status: $stat->{status} (transferred ${trans}, " .
"remaining ${rem}), total ${total})");