1 package PVE
::QemuServer
::Memory
;
6 use PVE
::Tools
qw(run_command lock_file lock_file_full file_read_firstline dir_glob_foreach);
7 use PVE
::Exception
qw(raise raise_param_exc);
10 use PVE
::QemuServer
::Monitor
qw(mon_cmd);
16 sub get_host_phys_address_bits
{
17 return $_host_bits if defined($_host_bits);
19 my $fh = IO
::File-
>new ('/proc/cpuinfo', "r") or return;
20 while (defined(my $line = <$fh>)) {
21 # hopefully we never need to care about mixed (big.LITTLE) archs
22 if ($line =~ m/^address sizes\s*:\s*(\d+)\s*bits physical/i) {
23 $_host_bits = int($1);
29 return; # undef, cannot really do anything..
36 if (my $cpu_prop_str = $conf->{cpu
}) {
37 $cpu = PVE
::JSONSchema
::parse_property_string
('pve-vm-cpu-conf', $cpu_prop_str)
38 or die "Cannot parse cpu description: $cpu_prop_str\n";
41 if (my $phys_bits = $cpu->{'phys-bits'}) {
42 if ($phys_bits eq 'host') {
43 $bits = get_host_phys_address_bits
();
44 } elsif ($phys_bits =~ /^(\d+)$/) {
45 $bits = int($phys_bits);
49 if (!defined($bits)) {
50 my $host_bits = get_host_phys_address_bits
() // 36; # fixme: what fallback?
51 if ($cpu->{cputype
} && $cpu->{cputype
} =~ /^(host|max)$/) {
54 $bits = $host_bits > 40 ?
40 : $host_bits; # take the smaller one
58 $bits = $bits & ~1; # round down to nearest even as limit is lower with odd bit sizes
60 # heuristic: remove 20 bits to get MB and half that as QEMU needs some overhead
61 my $bits_to_max_mem = int(1<<($bits - 21));
63 return $bits_to_max_mem > 4*1024*1024 ?
4*1024*1024 : $bits_to_max_mem;
66 sub get_numa_node_list
{
69 for (my $i = 0; $i < $MAX_NUMA; $i++) {
70 my $entry = $conf->{"numa$i"} or next;
71 my $numa = PVE
::QemuServer
::parse_numa
($entry) or next;
74 return @numa_map if @numa_map;
75 my $sockets = $conf->{sockets
} || 1;
76 return (0..($sockets-1));
79 sub host_numanode_exists
{
82 return -d
"/sys/devices/system/node/node$id/";
85 # only valid when numa nodes map to a single host node
86 sub get_numa_guest_to_host_map
{
89 for (my $i = 0; $i < $MAX_NUMA; $i++) {
90 my $entry = $conf->{"numa$i"} or next;
91 my $numa = PVE
::QemuServer
::parse_numa
($entry) or next;
92 $map->{$i} = print_numa_hostnodes
($numa->{hostnodes
});
95 my $sockets = $conf->{sockets
} || 1;
96 return {map { $_ => $_ } (0..($sockets-1))};
100 my ($conf, $vmid, $memory, $sockets, $func) = @_;
103 my $current_size = 0;
106 if($conf->{hugepages
} && $conf->{hugepages
} == 1024) {
107 $current_size = 1024 * $sockets;
110 $current_size = 1024;
114 return if $current_size == $memory;
116 my @numa_map = get_numa_node_list
($conf);
118 for (my $j = 0; $j < 8; $j++) {
119 for (my $i = 0; $i < 32; $i++) {
120 my $name = "dimm${dimm_id}";
122 my $numanode = $numa_map[$i % @numa_map];
123 $current_size += $dimm_size;
124 &$func($conf, $vmid, $name, $dimm_size, $numanode, $current_size, $memory);
125 return $current_size if $current_size >= $memory;
131 sub foreach_reverse_dimm
{
132 my ($conf, $vmid, $memory, $sockets, $func) = @_;
135 my $current_size = 0;
138 if($conf->{hugepages
} && $conf->{hugepages
} == 1024) {
139 $current_size = 8355840;
142 $current_size = 4177920;
146 return if $current_size == $memory;
148 my @numa_map = get_numa_node_list
($conf);
150 for (my $j = 0; $j < 8; $j++) {
151 for (my $i = 0; $i < 32; $i++) {
152 my $name = "dimm${dimm_id}";
154 my $numanode = $numa_map[(31-$i) % @numa_map];
155 $current_size -= $dimm_size;
156 &$func($conf, $vmid, $name, $dimm_size, $numanode, $current_size, $memory);
157 return $current_size if $current_size <= $memory;
163 sub qemu_memory_hotplug
{
164 my ($vmid, $conf, $defaults, $value) = @_;
166 return $value if !PVE
::QemuServer
::check_running
($vmid);
168 my $sockets = $conf->{sockets
} || 1;
170 my $memory = $conf->{memory
} || $defaults->{memory
};
171 $value = $defaults->{memory
} if !$value;
172 return $value if $value == $memory;
174 my $static_memory = $STATICMEM;
175 $static_memory = $static_memory * $sockets if ($conf->{hugepages
} && $conf->{hugepages
} == 1024);
177 die "memory can't be lower than $static_memory MB" if $value < $static_memory;
178 my $MAX_MEM = get_max_mem
($conf);
179 die "you cannot add more memory than max mem $MAX_MEM MB!\n" if $value > $MAX_MEM;
181 if ($value > $memory) {
185 foreach_dimm
($conf, $vmid, $value, $sockets, sub {
186 my ($conf, $vmid, $name, $dimm_size, $numanode, $current_size, $memory) = @_;
188 return if $current_size <= $conf->{memory
};
190 if ($conf->{hugepages
}) {
191 $numa_hostmap = get_numa_guest_to_host_map
($conf) if !$numa_hostmap;
193 my $hugepages_size = hugepages_size
($conf, $dimm_size);
194 my $path = hugepages_mount_path
($hugepages_size);
195 my $host_numanode = $numa_hostmap->{$numanode};
196 my $hugepages_topology->{$hugepages_size}->{$host_numanode} = hugepages_nr
($dimm_size, $hugepages_size);
199 my $hugepages_host_topology = hugepages_host_topology
();
200 hugepages_allocate
($hugepages_topology, $hugepages_host_topology);
202 eval { mon_cmd
($vmid, "object-add", 'qom-type' => "memory-backend-file", id
=> "mem-$name", size
=> int($dimm_size*1024*1024), 'mem-path' => $path, share
=> JSON
::true
, prealloc
=> JSON
::true
) };
204 hugepages_reset
($hugepages_host_topology);
208 hugepages_pre_deallocate
($hugepages_topology);
210 eval { hugepages_update_locked
($code); };
213 eval { mon_cmd
($vmid, "object-add", 'qom-type' => "memory-backend-ram", id
=> "mem-$name", size
=> int($dimm_size*1024*1024) ) };
217 eval { PVE
::QemuServer
::qemu_objectdel
($vmid, "mem-$name"); };
221 eval { mon_cmd
($vmid, "device_add", driver
=> "pc-dimm", id
=> "$name", memdev
=> "mem-$name", node
=> $numanode) };
223 eval { PVE
::QemuServer
::qemu_objectdel
($vmid, "mem-$name"); };
226 #update conf after each succesful module hotplug
227 $conf->{memory
} = $current_size;
228 PVE
::QemuConfig-
>write_config($vmid, $conf);
233 foreach_reverse_dimm
($conf, $vmid, $value, $sockets, sub {
234 my ($conf, $vmid, $name, $dimm_size, $numanode, $current_size, $memory) = @_;
236 return if $current_size >= $conf->{memory
};
237 print "try to unplug memory dimm $name\n";
241 eval { PVE
::QemuServer
::qemu_devicedel
($vmid, $name) };
243 my $dimm_list = qemu_memdevices_list
($vmid, 'dimm');
244 last if !$dimm_list->{$name};
245 raise_param_exc
({ $name => "error unplug memory module" }) if $retry > 5;
249 #update conf after each succesful module unplug
250 $conf->{memory
} = $current_size;
252 eval { PVE
::QemuServer
::qemu_objectdel
($vmid, "mem-$name"); };
253 PVE
::QemuConfig-
>write_config($vmid, $conf);
258 sub qemu_memdevices_list
{
259 my ($vmid, $type) = @_;
261 my $dimmarray = mon_cmd
($vmid, "query-memory-devices");
264 foreach my $dimm (@$dimmarray) {
265 next if $type && $dimm->{data
}->{id
} !~ /^$type(\d+)$/;
266 $dimms->{$dimm->{data
}->{id
}}->{id
} = $dimm->{data
}->{id
};
267 $dimms->{$dimm->{data
}->{id
}}->{node
} = $dimm->{data
}->{node
};
268 $dimms->{$dimm->{data
}->{id
}}->{addr
} = $dimm->{data
}->{addr
};
269 $dimms->{$dimm->{data
}->{id
}}->{size
} = $dimm->{data
}->{size
};
270 $dimms->{$dimm->{data
}->{id
}}->{slot
} = $dimm->{data
}->{slot
};
276 my ($conf, $vmid, $sockets, $cores, $defaults, $hotplug, $cmd) = @_;
278 my $memory = $conf->{memory
} || $defaults->{memory
};
279 my $static_memory = 0;
282 die "NUMA needs to be enabled for memory hotplug\n" if !$conf->{numa
};
283 my $MAX_MEM = get_max_mem
($conf);
284 die "Total memory is bigger than ${MAX_MEM}MB\n" if $memory > $MAX_MEM;
286 for (my $i = 0; $i < $MAX_NUMA; $i++) {
287 die "cannot enable memory hotplugging with custom NUMA topology\n"
288 if $conf->{"numa$i"};
291 my $sockets = $conf->{sockets
} || 1;
293 $static_memory = $STATICMEM;
294 $static_memory = $static_memory * $sockets if ($conf->{hugepages
} && $conf->{hugepages
} == 1024);
296 die "minimum memory must be ${static_memory}MB\n" if($memory < $static_memory);
297 push @$cmd, '-m', "size=${static_memory},slots=255,maxmem=${MAX_MEM}M";
301 $static_memory = $memory;
302 push @$cmd, '-m', $static_memory;
305 die "numa needs to be enabled to use hugepages" if $conf->{hugepages
} && !$conf->{numa
};
309 my $numa_totalmemory = undef;
310 for (my $i = 0; $i < $MAX_NUMA; $i++) {
311 next if !$conf->{"numa$i"};
312 my $numa = PVE
::QemuServer
::parse_numa
($conf->{"numa$i"});
315 die "missing NUMA node$i memory value\n" if !$numa->{memory
};
316 my $numa_memory = $numa->{memory
};
317 $numa_totalmemory += $numa_memory;
319 my $mem_object = print_mem_object
($conf, "ram-node$i", $numa_memory);
322 my $cpulists = $numa->{cpus
};
323 die "missing NUMA node$i cpus\n" if !defined($cpulists);
324 my $cpus = join(',cpus=', map {
325 my ($start, $end) = @$_;
326 defined($end) ?
"$start-$end" : $start
330 my $hostnodelists = $numa->{hostnodes
};
331 if (defined($hostnodelists)) {
333 my $hostnodes = print_numa_hostnodes
($hostnodelists);
336 my $policy = $numa->{policy
};
337 die "you need to define a policy for hostnode $hostnodes\n" if !$policy;
338 $mem_object .= ",host-nodes=$hostnodes,policy=$policy";
340 die "numa hostnodes need to be defined to use hugepages" if $conf->{hugepages
};
343 push @$cmd, '-object', $mem_object;
344 push @$cmd, '-numa', "node,nodeid=$i,cpus=$cpus,memdev=ram-node$i";
347 die "total memory for NUMA nodes must be equal to vm static memory\n"
348 if $numa_totalmemory && $numa_totalmemory != $static_memory;
350 #if no custom tology, we split memory and cores across numa nodes
351 if (!$numa_totalmemory) {
352 my $numa_memory = ($static_memory / $sockets);
354 for (my $i = 0; $i < $sockets; $i++) {
355 die "host NUMA node$i doesn't exist\n"
356 if !host_numanode_exists
($i) && $conf->{hugepages
};
358 my $mem_object = print_mem_object
($conf, "ram-node$i", $numa_memory);
359 push @$cmd, '-object', $mem_object;
361 my $cpus = ($cores * $i);
362 $cpus .= "-" . ($cpus + $cores - 1) if $cores > 1;
364 push @$cmd, '-numa', "node,nodeid=$i,cpus=$cpus,memdev=ram-node$i";
370 foreach_dimm
($conf, $vmid, $memory, $sockets, sub {
371 my ($conf, $vmid, $name, $dimm_size, $numanode, $current_size, $memory) = @_;
373 my $mem_object = print_mem_object
($conf, "mem-$name", $dimm_size);
375 push @$cmd, "-object" , $mem_object;
376 push @$cmd, "-device", "pc-dimm,id=$name,memdev=mem-$name,node=$numanode";
378 die "memory size ($memory) must be aligned to $dimm_size for hotplugging\n"
379 if $current_size > $memory;
384 sub print_mem_object
{
385 my ($conf, $id, $size) = @_;
387 if ($conf->{hugepages
}) {
389 my $hugepages_size = hugepages_size
($conf, $size);
390 my $path = hugepages_mount_path
($hugepages_size);
392 return "memory-backend-file,id=$id,size=${size}M,mem-path=$path,share=on,prealloc=yes";
394 return "memory-backend-ram,id=$id,size=${size}M";
399 sub print_numa_hostnodes
{
400 my ($hostnodelists) = @_;
403 foreach my $hostnoderange (@$hostnodelists) {
404 my ($start, $end) = @$hostnoderange;
405 $hostnodes .= ',' if $hostnodes;
406 $hostnodes .= $start;
407 $hostnodes .= "-$end" if defined($end);
409 for (my $i = $start; $i <= $end; ++$i ) {
410 die "host NUMA node$i doesn't exist\n" if !host_numanode_exists
($i);
416 sub hugepages_mount
{
418 my $mountdata = PVE
::ProcFSTools
::parse_proc_mounts
();
420 foreach my $size (qw(2048 1048576)) {
421 next if (! -d
"/sys/kernel/mm/hugepages/hugepages-${size}kB");
423 my $path = "/run/hugepages/kvm/${size}kB";
426 $_->[2] =~ /^hugetlbfs/ &&
432 File
::Path
::make_path
($path) if (!-d
$path);
433 my $cmd = ['/bin/mount', '-t', 'hugetlbfs', '-o', "pagesize=${size}k", 'hugetlbfs', $path];
434 run_command
($cmd, errmsg
=> "hugepage mount error");
439 sub hugepages_mount_path
{
442 $size = $size * 1024;
443 return "/run/hugepages/kvm/${size}kB";
448 my ($size, $hugepages_size) = @_;
450 return $size / $hugepages_size;
453 sub hugepages_chunk_size_supported
{
456 return -d
"/sys/kernel/mm/hugepages/hugepages-". ($size * 1024) ."kB";
460 my ($conf, $size) = @_;
461 die "hugepages option is not enabled" if !$conf->{hugepages
};
462 die "memory size '$size' is not a positive even integer; cannot use for hugepages\n"
463 if $size <= 0 || $size & 1;
465 die "your system doesn't support hugepages\n"
466 if !hugepages_chunk_size_supported
(2) && !hugepages_chunk_size_supported
(1024);
468 if ($conf->{hugepages
} eq 'any') {
470 # try to use 1GB if available && memory size is matching
471 if (hugepages_chunk_size_supported
(1024) && ($size & 1023) == 0) {
473 } elsif (hugepages_chunk_size_supported
(2)) {
476 die "host only supports 1024 GB hugepages, but requested size '$size' is not a multiple of 1024 MB\n"
480 my $hugepagesize = $conf->{hugepages
};
482 if (!hugepages_chunk_size_supported
($hugepagesize)) {
483 die "your system doesn't support hugepages of $hugepagesize MB\n";
484 } elsif (($size % $hugepagesize) != 0) {
485 die "Memory size $size is not a multiple of the requested hugepages size $hugepagesize\n";
492 sub hugepages_topology
{
493 my ($conf, $hotplug) = @_;
495 my $hugepages_topology = {};
497 return if !$conf->{numa
};
499 my $defaults = PVE
::QemuServer
::load_defaults
();
500 my $memory = $conf->{memory
} || $defaults->{memory
};
501 my $static_memory = 0;
502 my $sockets = $conf->{sockets
} || 1;
503 my $numa_custom_topology = undef;
506 $static_memory = $STATICMEM;
507 $static_memory = $static_memory * $sockets if ($conf->{hugepages
} && $conf->{hugepages
} == 1024);
509 $static_memory = $memory;
512 #custom numa topology
513 for (my $i = 0; $i < $MAX_NUMA; $i++) {
514 next if !$conf->{"numa$i"};
515 my $numa = PVE
::QemuServer
::parse_numa
($conf->{"numa$i"});
518 $numa_custom_topology = 1;
519 my $numa_memory = $numa->{memory
};
520 my $hostnodelists = $numa->{hostnodes
};
521 my $hostnodes = print_numa_hostnodes
($hostnodelists);
523 die "more than 1 hostnode value in numa node is not supported when hugepages are enabled" if $hostnodes !~ m/^(\d)$/;
524 my $hugepages_size = hugepages_size
($conf, $numa_memory);
525 $hugepages_topology->{$hugepages_size}->{$hostnodes} += hugepages_nr
($numa_memory, $hugepages_size);
529 #if no custom numa tology, we split memory and cores across numa nodes
530 if(!$numa_custom_topology) {
532 my $numa_memory = ($static_memory / $sockets);
534 for (my $i = 0; $i < $sockets; $i++) {
536 my $hugepages_size = hugepages_size
($conf, $numa_memory);
537 $hugepages_topology->{$hugepages_size}->{$i} += hugepages_nr
($numa_memory, $hugepages_size);
542 my $numa_hostmap = get_numa_guest_to_host_map
($conf);
544 foreach_dimm
($conf, undef, $memory, $sockets, sub {
545 my ($conf, undef, $name, $dimm_size, $numanode, $current_size, $memory) = @_;
547 $numanode = $numa_hostmap->{$numanode};
549 my $hugepages_size = hugepages_size
($conf, $dimm_size);
550 $hugepages_topology->{$hugepages_size}->{$numanode} += hugepages_nr
($dimm_size, $hugepages_size);
554 return $hugepages_topology;
557 sub hugepages_host_topology
{
560 my $hugepages_host_topology = {};
562 dir_glob_foreach
("/sys/devices/system/node/", 'node(\d+)', sub {
563 my ($nodepath, $numanode) = @_;
565 dir_glob_foreach
("/sys/devices/system/node/$nodepath/hugepages/", 'hugepages\-(\d+)kB', sub {
566 my ($hugepages_path, $hugepages_size) = @_;
568 $hugepages_size = $hugepages_size / 1024;
569 my $hugepages_nr = PVE
::Tools
::file_read_firstline
("/sys/devices/system/node/$nodepath/hugepages/$hugepages_path/nr_hugepages");
570 $hugepages_host_topology->{$hugepages_size}->{$numanode} = $hugepages_nr;
574 return $hugepages_host_topology;
577 sub hugepages_allocate
{
578 my ($hugepages_topology, $hugepages_host_topology) = @_;
580 #allocate new hupages if needed
581 foreach my $size (sort keys %$hugepages_topology) {
583 my $nodes = $hugepages_topology->{$size};
585 foreach my $numanode (keys %$nodes) {
587 my $hugepages_size = $size * 1024;
588 my $hugepages_requested = $hugepages_topology->{$size}->{$numanode};
589 my $path = "/sys/devices/system/node/node${numanode}/hugepages/hugepages-${hugepages_size}kB/";
590 my $hugepages_free = PVE
::Tools
::file_read_firstline
($path."free_hugepages");
591 my $hugepages_nr = PVE
::Tools
::file_read_firstline
($path."nr_hugepages");
593 if ($hugepages_requested > $hugepages_free) {
594 my $hugepages_needed = $hugepages_requested - $hugepages_free;
595 PVE
::ProcFSTools
::write_proc_entry
($path."nr_hugepages", $hugepages_nr + $hugepages_needed);
596 #verify that is correctly allocated
597 $hugepages_free = PVE
::Tools
::file_read_firstline
($path."free_hugepages");
598 if ($hugepages_free < $hugepages_requested) {
599 #rollback to initial host config
600 hugepages_reset
($hugepages_host_topology);
601 die "hugepage allocation failed";
610 sub hugepages_default_nr_hugepages
{
613 my $cmdline = PVE
::Tools
::file_read_firstline
("/proc/cmdline");
614 my $args = PVE
::Tools
::split_args
($cmdline);
616 my $parsed_size = 2; # default is 2M
618 foreach my $arg (@$args) {
619 if ($arg eq "hugepagesz=2M") {
621 } elsif ($arg eq "hugepagesz=1G") {
623 } elsif ($arg =~ m/^hugepages=(\d+)?$/) {
624 if ($parsed_size == $size) {
633 sub hugepages_pre_deallocate
{
634 my ($hugepages_topology) = @_;
636 foreach my $size (sort keys %$hugepages_topology) {
638 my $hugepages_size = $size * 1024;
639 my $path = "/sys/kernel/mm/hugepages/hugepages-${hugepages_size}kB/";
640 my $hugepages_nr = hugepages_default_nr_hugepages
($size);
641 PVE
::ProcFSTools
::write_proc_entry
($path."nr_hugepages", $hugepages_nr);
645 sub hugepages_reset
{
646 my ($hugepages_topology) = @_;
648 foreach my $size (sort keys %$hugepages_topology) {
650 my $nodes = $hugepages_topology->{$size};
651 foreach my $numanode (keys %$nodes) {
653 my $hugepages_nr = $hugepages_topology->{$size}->{$numanode};
654 my $hugepages_size = $size * 1024;
655 my $path = "/sys/devices/system/node/node${numanode}/hugepages/hugepages-${hugepages_size}kB/";
657 PVE
::ProcFSTools
::write_proc_entry
($path."nr_hugepages", $hugepages_nr);
662 sub hugepages_update_locked
{
663 my ($code, @param) = @_;
665 my $timeout = 60; #could be long if a lot of hugepages need to be alocated
667 my $lock_filename = "/var/lock/hugepages.lck";
669 my $res = lock_file
($lock_filename, $timeout, $code, @param);