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https://git.proxmox.com/git/qemu-server
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add hugepages option
vm configuration ---------------- hugepages: (any|2|1024) any: we'll try to allocate 1GB hugepage if possible, if not we use 2MB hugepage 2: we want to use 2MB hugepage 1024: we want to use 1GB hugepage. (memory need to be multiple of 1GB in this case) optionnal host configuration for 1GB hugepages ---------------------------------------------- 1GB hugepages can be allocated at boot if user want it. hugepages need to be contiguous, so sometime it's not possible to reserve them on the fly /etc/default/grub : GRUB_CMDLINE_LINUX_DEFAULT="quiet hugepagesz=1G hugepages=x" Signed-off-by: Alexandre Derumier <aderumier@odiso.com> Acked-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Alexandre Derumier
Wolfgang Bumiller
parent
062669f9a0
commit
7023f3ea16
@ -321,6 +321,12 @@ EODESC
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description => "Enable/disable NUMA.",
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default => 0,
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},
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hugepages => {
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optional => 1,
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type => 'string',
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description => "Enable/disable hugepages memory.",
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enum => [qw(any 2 1024)],
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},
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vcpus => {
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optional => 1,
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type => 'integer',
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@ -4354,19 +4360,48 @@ sub vm_start {
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my $cpuunits = defined($conf->{cpuunits}) ? $conf->{cpuunits}
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: $defaults->{cpuunits};
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eval {
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my %properties = (
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Slice => 'qemu.slice',
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KillMode => 'none',
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CPUShares => $cpuunits
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);
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if (my $cpulimit = $conf->{cpulimit}) {
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$properties{CPUQuota} = int($cpulimit * 100);
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}
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$properties{timeout} = 10 if $statefile; # setting up the scope shoul be quick
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PVE::Tools::enter_systemd_scope($vmid, "Proxmox VE VM $vmid", %properties);
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run_command($cmd, timeout => $statefile ? undef : 30, umask => 0077);
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};
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my %run_params = (timeout => $statefile ? undef : 30, umask => 0077);
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my %properties = (
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Slice => 'qemu.slice',
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KillMode => 'none',
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CPUShares => $cpuunits
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);
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if (my $cpulimit = $conf->{cpulimit}) {
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$properties{CPUQuota} = int($cpulimit * 100);
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}
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$properties{timeout} = 10 if $statefile; # setting up the scope shoul be quick
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if ($conf->{hugepages}) {
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my $code = sub {
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my $hugepages_topology = PVE::QemuServer::Memory::hugepages_topology($conf);
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my $hugepages_host_topology = PVE::QemuServer::Memory::hugepages_host_topology();
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PVE::QemuServer::Memory::hugepages_mount();
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PVE::QemuServer::Memory::hugepages_allocate($hugepages_topology, $hugepages_host_topology);
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eval {
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PVE::Tools::enter_systemd_scope($vmid, "Proxmox VE VM $vmid", %properties);
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run_command($cmd, %run_params);
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};
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if (my $err = $@) {
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PVE::QemuServer::Memory::hugepages_reset($hugepages_host_topology);
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die $err;
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}
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PVE::QemuServer::Memory::hugepages_pre_deallocate($hugepages_topology);
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};
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eval { PVE::QemuServer::Memory::hugepages_update_locked($code); };
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} else {
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eval {
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PVE::Tools::enter_systemd_scope($vmid, "Proxmox VE VM $vmid", %properties);
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run_command($cmd, %run_params);
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};
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}
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if (my $err = $@) {
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# deactivate volumes if start fails
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@ -3,6 +3,7 @@ package PVE::QemuServer::Memory;
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use strict;
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use warnings;
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use PVE::QemuServer;
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use PVE::Tools qw(run_command lock_file lock_file_full file_read_firstline dir_glob_foreach);
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use PVE::Exception qw(raise raise_param_exc);
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my $MAX_NUMA = 8;
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@ -13,8 +14,17 @@ sub foreach_dimm{
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my ($conf, $vmid, $memory, $sockets, $func) = @_;
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my $dimm_id = 0;
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my $current_size = 1024;
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my $dimm_size = 512;
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my $current_size = 0;
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my $dimm_size = 0;
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if($conf->{hugepages} && $conf->{hugepages} == 1024) {
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$current_size = 1024 * $sockets;
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$dimm_size = 1024;
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} else {
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$current_size = 1024;
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$dimm_size = 512;
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}
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return if $current_size == $memory;
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for (my $j = 0; $j < 8; $j++) {
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@ -34,8 +44,17 @@ sub foreach_reverse_dimm {
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my ($conf, $vmid, $memory, $sockets, $func) = @_;
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my $dimm_id = 253;
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my $current_size = 4177920;
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my $dimm_size = 65536;
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my $current_size = 0;
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my $dimm_size = 0;
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if($conf->{hugepages} && $conf->{hugepages} == 1024) {
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$current_size = 8355840;
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$dimm_size = 131072;
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} else {
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$current_size = 4177920;
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$dimm_size = 65536;
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}
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return if $current_size == $memory;
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for (my $j = 0; $j < 8; $j++) {
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@ -56,20 +75,19 @@ sub qemu_memory_hotplug {
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return $value if !PVE::QemuServer::check_running($vmid);
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my $sockets = 1;
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$sockets = $conf->{sockets} if $conf->{sockets};
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my $memory = $conf->{memory} || $defaults->{memory};
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$value = $defaults->{memory} if !$value;
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return $value if $value == $memory;
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my $static_memory = $STATICMEM;
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my $dimm_memory = $memory - $static_memory;
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$static_memory = $static_memory * $sockets if ($conf->{hugepages} && $conf->{hugepages} == 1024);
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die "memory can't be lower than $static_memory MB" if $value < $static_memory;
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die "you cannot add more memory than $MAX_MEM MB!\n" if $memory > $MAX_MEM;
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my $sockets = 1;
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$sockets = $conf->{sockets} if $conf->{sockets};
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if($value > $memory) {
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foreach_dimm($conf, $vmid, $value, $sockets, sub {
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@ -77,7 +95,31 @@ sub qemu_memory_hotplug {
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return if $current_size <= $conf->{memory};
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eval { PVE::QemuServer::vm_mon_cmd($vmid, "object-add", 'qom-type' => "memory-backend-ram", id => "mem-$name", props => { size => int($dimm_size*1024*1024) } ) };
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if ($conf->{hugepages}) {
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my $hugepages_size = hugepages_size($conf, $dimm_size);
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my $path = hugepages_mount_path($hugepages_size);
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my $hugepages_topology->{$hugepages_size}->{$numanode} = hugepages_nr($dimm_size, $hugepages_size);
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my $code = sub {
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my $hugepages_host_topology = hugepages_host_topology();
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hugepages_allocate($hugepages_topology, $hugepages_host_topology);
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eval { PVE::QemuServer::vm_mon_cmd($vmid, "object-add", 'qom-type' => "memory-backend-file", id => "mem-$name", props => {
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size => int($dimm_size*1024*1024), 'mem-path' => $path, share => JSON::true, prealloc => JSON::true } ); };
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if (my $err = $@) {
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hugepages_reset($hugepages_host_topology);
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die $err;
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}
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hugepages_pre_deallocate($hugepages_topology);
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};
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eval { hugepages_update_locked($code); };
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} else {
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eval { PVE::QemuServer::vm_mon_cmd($vmid, "object-add", 'qom-type' => "memory-backend-ram", id => "mem-$name", props => { size => int($dimm_size*1024*1024) } ) };
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}
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if (my $err = $@) {
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eval { PVE::QemuServer::qemu_objectdel($vmid, "mem-$name"); };
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die $err;
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@ -142,14 +184,17 @@ sub config {
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my $memory = $conf->{memory} || $defaults->{memory};
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my $static_memory = 0;
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my $dimm_memory = 0;
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if ($hotplug_features->{memory}) {
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die "NUMA need to be enabled for memory hotplug\n" if !$conf->{numa};
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die "NUMA needs to be enabled for memory hotplug\n" if !$conf->{numa};
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die "Total memory is bigger than ${MAX_MEM}MB\n" if $memory > $MAX_MEM;
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my $sockets = 1;
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$sockets = $conf->{sockets} if $conf->{sockets};
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$static_memory = $STATICMEM;
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$static_memory = $static_memory * $sockets if ($conf->{hugepages} && $conf->{hugepages} == 1024);
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die "minimum memory must be ${static_memory}MB\n" if($memory < $static_memory);
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$dimm_memory = $memory - $static_memory;
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push @$cmd, '-m', "size=${static_memory},slots=255,maxmem=${MAX_MEM}M";
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} else {
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@ -158,6 +203,8 @@ sub config {
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push @$cmd, '-m', $static_memory;
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}
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die "numa needs to be enabled to use hugepages" if $conf->{hugepages} && !$conf->{numa};
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if ($conf->{numa}) {
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my $numa_totalmemory = undef;
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@ -169,7 +216,8 @@ sub config {
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die "missing NUMA node$i memory value\n" if !$numa->{memory};
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my $numa_memory = $numa->{memory};
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$numa_totalmemory += $numa_memory;
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my $numa_object = "memory-backend-ram,id=ram-node$i,size=${numa_memory}M";
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my $mem_object = print_mem_object($conf, "ram-node$i", $numa_memory);
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# cpus
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my $cpulists = $numa->{cpus};
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@ -190,17 +238,19 @@ sub config {
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$hostnodes .= "-$end" if defined($end);
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$end //= $start;
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for (my $i = $start; $i <= $end; ++$i ) {
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die "host NUMA node$i don't exist\n" if ! -d "/sys/devices/system/node/node$i/";
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die "host NUMA node$i doesn't exist\n" if ! -d "/sys/devices/system/node/node$i/";
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}
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}
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# policy
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my $policy = $numa->{policy};
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die "you need to define a policy for hostnode $hostnodes\n" if !$policy;
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$numa_object .= ",host-nodes=$hostnodes,policy=$policy";
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$mem_object .= ",host-nodes=$hostnodes,policy=$policy";
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} else {
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die "numa hostnodes need to be defined to use hugepages" if $conf->{hugepages};
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}
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push @$cmd, '-object', $numa_object;
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push @$cmd, '-object', $mem_object;
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push @$cmd, '-numa', "node,nodeid=$i,cpus=$cpus,memdev=ram-node$i";
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}
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@ -210,16 +260,19 @@ sub config {
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#if no custom tology, we split memory and cores across numa nodes
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if(!$numa_totalmemory) {
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my $numa_memory = ($static_memory / $sockets) . "M";
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my $numa_memory = ($static_memory / $sockets);
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for (my $i = 0; $i < $sockets; $i++) {
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die "host NUMA node$i doesn't exist\n" if ! -d "/sys/devices/system/node/node$i/";
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my $cpustart = ($cores * $i);
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my $cpuend = ($cpustart + $cores - 1) if $cores && $cores > 1;
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my $cpus = $cpustart;
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$cpus .= "-$cpuend" if $cpuend;
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push @$cmd, '-object', "memory-backend-ram,size=$numa_memory,id=ram-node$i";
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my $mem_object = print_mem_object($conf, "ram-node$i", $numa_memory);
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push @$cmd, '-object', $mem_object;
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push @$cmd, '-numa', "node,nodeid=$i,cpus=$cpus,memdev=ram-node$i";
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}
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}
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@ -228,7 +281,10 @@ sub config {
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if ($hotplug_features->{memory}) {
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foreach_dimm($conf, $vmid, $memory, $sockets, sub {
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my ($conf, $vmid, $name, $dimm_size, $numanode, $current_size, $memory) = @_;
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push @$cmd, "-object" , "memory-backend-ram,id=mem-$name,size=${dimm_size}M";
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my $mem_object = print_mem_object($conf, "mem-$name", $dimm_size);
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push @$cmd, "-object" , $mem_object;
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push @$cmd, "-device", "pc-dimm,id=$name,memdev=mem-$name,node=$numanode";
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#if dimm_memory is not aligned to dimm map
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@ -240,6 +296,239 @@ sub config {
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}
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}
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sub print_mem_object {
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my ($conf, $id, $size) = @_;
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if ($conf->{hugepages}) {
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my $hugepages_size = hugepages_size($conf, $size);
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my $path = hugepages_mount_path($hugepages_size);
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return "memory-backend-file,id=$id,size=${size}M,mem-path=$path,share=on,prealloc=yes";
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} else {
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return "memory-backend-ram,id=$id,size=${size}M";
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}
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}
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sub hugepages_mount {
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my $mountdata = PVE::ProcFSTools::parse_proc_mounts();
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foreach my $size (qw(2048 1048576)) {
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return if (! -d "/sys/kernel/mm/hugepages/hugepages-${size}kB");
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my $path = "/run/hugepages/kvm/${size}kB";
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my $found = grep {
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$_->[2] =~ /^hugetlbfs/ &&
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$_->[1] eq $path
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} @$mountdata;
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if (!$found) {
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File::Path::make_path($path) if (!-d $path);
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my $cmd = ['/bin/mount', '-t', 'hugetlbfs', '-o', "pagesize=${size}k", 'hugetlbfs', $path];
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run_command($cmd, errmsg => "hugepage mount error");
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}
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}
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}
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sub hugepages_mount_path {
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my ($size) = @_;
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$size = $size * 1024;
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return "/run/hugepages/kvm/${size}kB";
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}
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sub hugepages_nr {
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my ($size, $hugepages_size) = @_;
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return $size / $hugepages_size;
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}
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sub hugepages_size {
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my ($conf, $size) = @_;
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die "hugepages option is not enabled" if !$conf->{hugepages};
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if ($conf->{hugepages} eq 'any') {
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#try to use 1GB if available && memory size is matching
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if (-d "/sys/kernel/mm/hugepages/hugepages-1048576kB" && ($size % 1024 == 0)) {
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return 1024;
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} else {
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return 2;
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}
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} else {
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my $hugepagesize = $conf->{hugepages} * 1024 . "kB";
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if (! -d "/sys/kernel/mm/hugepages/hugepages-$hugepagesize") {
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die "your system doesn't support hugepages of $hugepagesize";
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}
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die "Memory size $size is not a multiple of the requested hugepages size $hugepagesize" if ($size % $conf->{hugepages}) != 0;
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return $conf->{hugepages};
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}
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}
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sub hugepages_topology {
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my ($conf) = @_;
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my $hugepages_topology = {};
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return if !$conf->{numa};
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my $defaults = PVE::QemuServer::load_defaults();
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my $memory = $conf->{memory} || $defaults->{memory};
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my $static_memory = 0;
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my $sockets = 1;
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$sockets = $conf->{smp} if $conf->{smp}; # old style - no longer iused
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$sockets = $conf->{sockets} if $conf->{sockets};
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my $numa_custom_topology = undef;
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my $hotplug_features = PVE::QemuServer::parse_hotplug_features(defined($conf->{hotplug}) ? $conf->{hotplug} : '1');
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if ($hotplug_features->{memory}) {
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$static_memory = $STATICMEM;
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$static_memory = $static_memory * $sockets if ($conf->{hugepages} && $conf->{hugepages} == 1024);
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} else {
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$static_memory = $memory;
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}
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#custom numa topology
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for (my $i = 0; $i < $MAX_NUMA; $i++) {
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next if !$conf->{"numa$i"};
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my $numa = PVE::QemuServer::parse_numa($conf->{"numa$i"});
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next if !$numa;
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$numa_custom_topology = 1;
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my $numa_memory = $numa->{memory};
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my $hugepages_size = hugepages_size($conf, $numa_memory);
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$hugepages_topology->{$hugepages_size}->{$i} += hugepages_nr($numa_memory, $hugepages_size);
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}
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#if no custom numa tology, we split memory and cores across numa nodes
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if(!$numa_custom_topology) {
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my $numa_memory = ($static_memory / $sockets);
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for (my $i = 0; $i < $sockets; $i++) {
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my $hugepages_size = hugepages_size($conf, $numa_memory);
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$hugepages_topology->{$hugepages_size}->{$i} += hugepages_nr($numa_memory, $hugepages_size);
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}
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}
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if ($hotplug_features->{memory}) {
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foreach_dimm($conf, undef, $memory, $sockets, sub {
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my ($conf, undef, $name, $dimm_size, $numanode, $current_size, $memory) = @_;
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my $hugepages_size = hugepages_size($conf, $dimm_size);
|
||||
$hugepages_topology->{$hugepages_size}->{$numanode} += hugepages_nr($dimm_size, $hugepages_size);
|
||||
});
|
||||
}
|
||||
|
||||
return $hugepages_topology;
|
||||
}
|
||||
|
||||
sub hugepages_host_topology {
|
||||
|
||||
#read host hugepages
|
||||
my $hugepages_host_topology = {};
|
||||
|
||||
dir_glob_foreach("/sys/devices/system/node/", 'node(\d+)', sub {
|
||||
my ($nodepath, $numanode) = @_;
|
||||
|
||||
dir_glob_foreach("/sys/devices/system/node/$nodepath/hugepages/", 'hugepages\-(\d+)kB', sub {
|
||||
my ($hugepages_path, $hugepages_size) = @_;
|
||||
|
||||
$hugepages_size = $hugepages_size / 1024;
|
||||
my $hugepages_nr = PVE::Tools::file_read_firstline("/sys/devices/system/node/$nodepath/hugepages/$hugepages_path/nr_hugepages");
|
||||
$hugepages_host_topology->{$hugepages_size}->{$numanode} = $hugepages_nr;
|
||||
});
|
||||
});
|
||||
|
||||
return $hugepages_host_topology;
|
||||
}
|
||||
|
||||
sub hugepages_allocate {
|
||||
my ($hugepages_topology, $hugepages_host_topology) = @_;
|
||||
|
||||
#allocate new hupages if needed
|
||||
foreach my $size (sort keys %$hugepages_topology) {
|
||||
|
||||
my $nodes = $hugepages_topology->{$size};
|
||||
|
||||
foreach my $numanode (keys %$nodes) {
|
||||
|
||||
my $hugepages_size = $size * 1024;
|
||||
my $hugepages_requested = $hugepages_topology->{$size}->{$numanode};
|
||||
my $path = "/sys/devices/system/node/node${numanode}/hugepages/hugepages-${hugepages_size}kB/";
|
||||
my $hugepages_free = PVE::Tools::file_read_firstline($path."free_hugepages");
|
||||
my $hugepages_nr = PVE::Tools::file_read_firstline($path."nr_hugepages");
|
||||
|
||||
if ($hugepages_requested > $hugepages_free) {
|
||||
my $hugepages_needed = $hugepages_requested - $hugepages_free;
|
||||
PVE::ProcFSTools::write_proc_entry($path."nr_hugepages", $hugepages_nr + $hugepages_needed);
|
||||
#verify that is correctly allocated
|
||||
$hugepages_free = PVE::Tools::file_read_firstline($path."free_hugepages");
|
||||
if ($hugepages_free < $hugepages_requested) {
|
||||
#rollback to initial host config
|
||||
hugepages_reset($hugepages_host_topology);
|
||||
die "hugepage allocation failed";
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
sub hugepages_pre_deallocate {
|
||||
my ($hugepages_topology) = @_;
|
||||
|
||||
foreach my $size (sort keys %$hugepages_topology) {
|
||||
|
||||
my $hugepages_size = $size * 1024;
|
||||
my $path = "/sys/kernel/mm/hugepages/hugepages-${hugepages_size}kB/";
|
||||
my $hugepages_nr = PVE::Tools::file_read_firstline($path."nr_hugepages");
|
||||
PVE::ProcFSTools::write_proc_entry($path."nr_hugepages", 0);
|
||||
}
|
||||
}
|
||||
|
||||
sub hugepages_reset {
|
||||
my ($hugepages_topology) = @_;
|
||||
|
||||
foreach my $size (sort keys %$hugepages_topology) {
|
||||
|
||||
my $nodes = $hugepages_topology->{$size};
|
||||
foreach my $numanode (keys %$nodes) {
|
||||
|
||||
my $hugepages_nr = $hugepages_topology->{$size}->{$numanode};
|
||||
my $hugepages_size = $size * 1024;
|
||||
my $path = "/sys/devices/system/node/node${numanode}/hugepages/hugepages-${hugepages_size}kB/";
|
||||
|
||||
PVE::ProcFSTools::write_proc_entry($path."nr_hugepages", $hugepages_nr);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
sub hugepages_update_locked {
|
||||
my ($code, @param) = @_;
|
||||
|
||||
my $timeout = 60; #could be long if a lot of hugepages need to be alocated
|
||||
|
||||
my $lock_filename = "/var/lock/hugepages.lck";
|
||||
|
||||
my $res = lock_file($lock_filename, $timeout, $code, @param);
|
||||
die $@ if $@;
|
||||
|
||||
return $res;
|
||||
}
|
||||
1;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user