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Commit | Line | Data |
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a0649da2 AD |
1 | package PVE::QemuServer::Memory; |
2 | ||
3 | use strict; | |
4 | use warnings; | |
71aba4ea | 5 | |
0e32bf5b | 6 | use PVE::JSONSchema qw(parse_property_string); |
7023f3ea | 7 | use PVE::Tools qw(run_command lock_file lock_file_full file_read_firstline dir_glob_foreach); |
9a1c413f | 8 | use PVE::Exception qw(raise raise_param_exc); |
a0649da2 | 9 | |
71aba4ea | 10 | use PVE::QemuServer; |
0e32bf5b | 11 | use PVE::QemuServer::Helpers qw(parse_number_sets); |
0a13e08e | 12 | use PVE::QemuServer::Monitor qw(mon_cmd); |
87b0f305 | 13 | use PVE::QemuServer::QMPHelpers qw(qemu_devicedel qemu_objectdel); |
71aba4ea | 14 | |
0e32bf5b FE |
15 | our $MAX_NUMA = 8; |
16 | ||
17 | my $numa_fmt = { | |
18 | cpus => { | |
19 | type => "string", | |
20 | pattern => qr/\d+(?:-\d+)?(?:;\d+(?:-\d+)?)*/, | |
21 | description => "CPUs accessing this NUMA node.", | |
22 | format_description => "id[-id];...", | |
23 | }, | |
24 | memory => { | |
25 | type => "number", | |
26 | description => "Amount of memory this NUMA node provides.", | |
27 | optional => 1, | |
28 | }, | |
29 | hostnodes => { | |
30 | type => "string", | |
31 | pattern => qr/\d+(?:-\d+)?(?:;\d+(?:-\d+)?)*/, | |
32 | description => "Host NUMA nodes to use.", | |
33 | format_description => "id[-id];...", | |
34 | optional => 1, | |
35 | }, | |
36 | policy => { | |
37 | type => 'string', | |
38 | enum => [qw(preferred bind interleave)], | |
39 | description => "NUMA allocation policy.", | |
40 | optional => 1, | |
41 | }, | |
42 | }; | |
43 | PVE::JSONSchema::register_format('pve-qm-numanode', $numa_fmt); | |
44 | our $numadesc = { | |
45 | optional => 1, | |
46 | type => 'string', format => $numa_fmt, | |
47 | description => "NUMA topology.", | |
48 | }; | |
49 | PVE::JSONSchema::register_standard_option("pve-qm-numanode", $numadesc); | |
50 | ||
51 | sub parse_numa { | |
52 | my ($data) = @_; | |
53 | ||
54 | my $res = parse_property_string($numa_fmt, $data); | |
55 | $res->{cpus} = parse_number_sets($res->{cpus}) if defined($res->{cpus}); | |
56 | $res->{hostnodes} = parse_number_sets($res->{hostnodes}) if defined($res->{hostnodes}); | |
57 | return $res; | |
58 | } | |
59 | ||
6779f1ac | 60 | my $STATICMEM = 1024; |
a0649da2 | 61 | |
33b0d3b7 | 62 | my $_host_bits; |
2166f6a9 | 63 | sub get_host_phys_address_bits { |
33b0d3b7 TL |
64 | return $_host_bits if defined($_host_bits); |
65 | ||
66 | my $fh = IO::File->new ('/proc/cpuinfo', "r") or return; | |
67 | while (defined(my $line = <$fh>)) { | |
68 | # hopefully we never need to care about mixed (big.LITTLE) archs | |
69 | if ($line =~ m/^address sizes\s*:\s*(\d+)\s*bits physical/i) { | |
70 | $_host_bits = int($1); | |
71 | $fh->close(); | |
72 | return $_host_bits; | |
73 | } | |
74 | } | |
75 | $fh->close(); | |
76 | return; # undef, cannot really do anything.. | |
77 | } | |
78 | ||
79 | my sub get_max_mem { | |
80 | my ($conf) = @_; | |
81 | ||
82 | my $cpu = {}; | |
83 | if (my $cpu_prop_str = $conf->{cpu}) { | |
84 | $cpu = PVE::JSONSchema::parse_property_string('pve-vm-cpu-conf', $cpu_prop_str) | |
85 | or die "Cannot parse cpu description: $cpu_prop_str\n"; | |
86 | } | |
87 | my $bits; | |
88 | if (my $phys_bits = $cpu->{'phys-bits'}) { | |
89 | if ($phys_bits eq 'host') { | |
90 | $bits = get_host_phys_address_bits(); | |
91 | } elsif ($phys_bits =~ /^(\d+)$/) { | |
92 | $bits = int($phys_bits); | |
93 | } | |
94 | } | |
95 | ||
96 | if (!defined($bits)) { | |
97 | my $host_bits = get_host_phys_address_bits() // 36; # fixme: what fallback? | |
98 | if ($cpu->{cputype} && $cpu->{cputype} =~ /^(host|max)$/) { | |
99 | $bits = $host_bits; | |
100 | } else { | |
101 | $bits = $host_bits > 40 ? 40 : $host_bits; # take the smaller one | |
102 | } | |
103 | } | |
104 | ||
305e9cec TL |
105 | $bits = $bits & ~1; # round down to nearest even as limit is lower with odd bit sizes |
106 | ||
107 | # heuristic: remove 20 bits to get MB and half that as QEMU needs some overhead | |
108 | my $bits_to_max_mem = int(1<<($bits - 21)); | |
33b0d3b7 TL |
109 | |
110 | return $bits_to_max_mem > 4*1024*1024 ? 4*1024*1024 : $bits_to_max_mem; | |
111 | } | |
112 | ||
aaff69ad WB |
113 | sub get_numa_node_list { |
114 | my ($conf) = @_; | |
115 | my @numa_map; | |
116 | for (my $i = 0; $i < $MAX_NUMA; $i++) { | |
117 | my $entry = $conf->{"numa$i"} or next; | |
0e32bf5b | 118 | my $numa = parse_numa($entry) or next; |
aaff69ad WB |
119 | push @numa_map, $i; |
120 | } | |
121 | return @numa_map if @numa_map; | |
122 | my $sockets = $conf->{sockets} || 1; | |
123 | return (0..($sockets-1)); | |
124 | } | |
125 | ||
2166f6a9 AD |
126 | sub host_numanode_exists { |
127 | my ($id) = @_; | |
128 | ||
129 | return -d "/sys/devices/system/node/node$id/"; | |
130 | } | |
131 | ||
aaff69ad WB |
132 | # only valid when numa nodes map to a single host node |
133 | sub get_numa_guest_to_host_map { | |
134 | my ($conf) = @_; | |
135 | my $map = {}; | |
136 | for (my $i = 0; $i < $MAX_NUMA; $i++) { | |
137 | my $entry = $conf->{"numa$i"} or next; | |
0e32bf5b | 138 | my $numa = parse_numa($entry) or next; |
aaff69ad WB |
139 | $map->{$i} = print_numa_hostnodes($numa->{hostnodes}); |
140 | } | |
141 | return $map if %$map; | |
142 | my $sockets = $conf->{sockets} || 1; | |
1d682951 | 143 | return {map { $_ => $_ } (0..($sockets-1))}; |
aaff69ad WB |
144 | } |
145 | ||
3f669af2 | 146 | sub foreach_dimm{ |
a132d50e | 147 | my ($conf, $vmid, $memory, $static_memory, $func) = @_; |
3f669af2 AD |
148 | |
149 | my $dimm_id = 0; | |
a132d50e | 150 | my $current_size = $static_memory; |
7023f3ea AD |
151 | my $dimm_size = 0; |
152 | ||
153 | if($conf->{hugepages} && $conf->{hugepages} == 1024) { | |
7023f3ea AD |
154 | $dimm_size = 1024; |
155 | } else { | |
7023f3ea AD |
156 | $dimm_size = 512; |
157 | } | |
158 | ||
3f669af2 AD |
159 | return if $current_size == $memory; |
160 | ||
aaff69ad WB |
161 | my @numa_map = get_numa_node_list($conf); |
162 | ||
3f669af2 AD |
163 | for (my $j = 0; $j < 8; $j++) { |
164 | for (my $i = 0; $i < 32; $i++) { | |
165 | my $name = "dimm${dimm_id}"; | |
166 | $dimm_id++; | |
aaff69ad | 167 | my $numanode = $numa_map[$i % @numa_map]; |
3f669af2 AD |
168 | $current_size += $dimm_size; |
169 | &$func($conf, $vmid, $name, $dimm_size, $numanode, $current_size, $memory); | |
170 | return $current_size if $current_size >= $memory; | |
171 | } | |
172 | $dimm_size *= 2; | |
173 | } | |
174 | } | |
175 | ||
6779f1ac | 176 | sub qemu_memory_hotplug { |
39c074fe | 177 | my ($vmid, $conf, $defaults, $value) = @_; |
6779f1ac | 178 | |
2951c45e | 179 | return $value if !PVE::QemuServer::Helpers::vm_running_locally($vmid); |
6779f1ac | 180 | |
d82ae201 | 181 | my $sockets = $conf->{sockets} || 1; |
7023f3ea | 182 | |
6779f1ac AD |
183 | my $memory = $conf->{memory} || $defaults->{memory}; |
184 | $value = $defaults->{memory} if !$value; | |
185 | return $value if $value == $memory; | |
186 | ||
187 | my $static_memory = $STATICMEM; | |
7023f3ea | 188 | $static_memory = $static_memory * $sockets if ($conf->{hugepages} && $conf->{hugepages} == 1024); |
6779f1ac AD |
189 | |
190 | die "memory can't be lower than $static_memory MB" if $value < $static_memory; | |
33b0d3b7 | 191 | my $MAX_MEM = get_max_mem($conf); |
62b26624 | 192 | die "you cannot add more memory than max mem $MAX_MEM MB!\n" if $value > $MAX_MEM; |
6779f1ac | 193 | |
33b0d3b7 | 194 | if ($value > $memory) { |
6779f1ac | 195 | |
f7d1505b | 196 | my $numa_hostmap; |
aaff69ad | 197 | |
a132d50e | 198 | foreach_dimm($conf, $vmid, $value, $static_memory, sub { |
6779f1ac AD |
199 | my ($conf, $vmid, $name, $dimm_size, $numanode, $current_size, $memory) = @_; |
200 | ||
201 | return if $current_size <= $conf->{memory}; | |
202 | ||
7023f3ea | 203 | if ($conf->{hugepages}) { |
f7d1505b | 204 | $numa_hostmap = get_numa_guest_to_host_map($conf) if !$numa_hostmap; |
7023f3ea AD |
205 | |
206 | my $hugepages_size = hugepages_size($conf, $dimm_size); | |
207 | my $path = hugepages_mount_path($hugepages_size); | |
aaff69ad WB |
208 | my $host_numanode = $numa_hostmap->{$numanode}; |
209 | my $hugepages_topology->{$hugepages_size}->{$host_numanode} = hugepages_nr($dimm_size, $hugepages_size); | |
7023f3ea AD |
210 | |
211 | my $code = sub { | |
212 | my $hugepages_host_topology = hugepages_host_topology(); | |
213 | hugepages_allocate($hugepages_topology, $hugepages_host_topology); | |
214 | ||
ae776a62 | 215 | eval { mon_cmd($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 ) }; |
7023f3ea AD |
216 | if (my $err = $@) { |
217 | hugepages_reset($hugepages_host_topology); | |
218 | die $err; | |
219 | } | |
220 | ||
221 | hugepages_pre_deallocate($hugepages_topology); | |
222 | }; | |
223 | eval { hugepages_update_locked($code); }; | |
224 | ||
225 | } else { | |
ae776a62 | 226 | eval { mon_cmd($vmid, "object-add", 'qom-type' => "memory-backend-ram", id => "mem-$name", size => int($dimm_size*1024*1024) ) }; |
7023f3ea AD |
227 | } |
228 | ||
6779f1ac | 229 | if (my $err = $@) { |
87b0f305 | 230 | eval { qemu_objectdel($vmid, "mem-$name"); }; |
6779f1ac AD |
231 | die $err; |
232 | } | |
233 | ||
0a13e08e | 234 | eval { mon_cmd($vmid, "device_add", driver => "pc-dimm", id => "$name", memdev => "mem-$name", node => $numanode) }; |
6779f1ac | 235 | if (my $err = $@) { |
87b0f305 | 236 | eval { qemu_objectdel($vmid, "mem-$name"); }; |
6779f1ac AD |
237 | die $err; |
238 | } | |
239 | #update conf after each succesful module hotplug | |
240 | $conf->{memory} = $current_size; | |
241 | PVE::QemuConfig->write_config($vmid, $conf); | |
242 | }); | |
243 | ||
244 | } else { | |
245 | ||
d1b25a22 | 246 | my $dimms = qemu_memdevices_list($vmid, 'dimm'); |
6779f1ac | 247 | |
d1b25a22 | 248 | my $current_size = $memory; |
2cf20319 | 249 | for my $name (sort { ($b =~ /^dimm(\d+)$/)[0] <=> ($a =~ /^dimm(\d+)$/)[0] } keys %$dimms) { |
6779f1ac | 250 | |
d1b25a22 | 251 | my $dimm_size = $dimms->{$name}->{size} / 1024 / 1024; |
6779f1ac | 252 | |
d1b25a22 AD |
253 | last if $current_size <= $value; |
254 | ||
255 | print "try to unplug memory dimm $name\n"; | |
256 | ||
257 | my $retry = 0; | |
258 | while (1) { | |
87b0f305 | 259 | eval { qemu_devicedel($vmid, $name) }; |
d1b25a22 AD |
260 | sleep 3; |
261 | my $dimm_list = qemu_memdevices_list($vmid, 'dimm'); | |
262 | last if !$dimm_list->{$name}; | |
263 | raise_param_exc({ $name => "error unplug memory module" }) if $retry > 5; | |
264 | $retry++; | |
265 | } | |
266 | $current_size -= $dimm_size; | |
267 | #update conf after each succesful module unplug | |
268 | $conf->{memory} = $current_size; | |
269 | ||
87b0f305 | 270 | eval { qemu_objectdel($vmid, "mem-$name"); }; |
d1b25a22 AD |
271 | PVE::QemuConfig->write_config($vmid, $conf); |
272 | } | |
6779f1ac | 273 | } |
d1b25a22 | 274 | return $conf->{memory}; |
6779f1ac AD |
275 | } |
276 | ||
1e28e8ba AD |
277 | sub qemu_memdevices_list { |
278 | my ($vmid, $type) = @_; | |
6779f1ac | 279 | |
0a13e08e | 280 | my $dimmarray = mon_cmd($vmid, "query-memory-devices"); |
6779f1ac AD |
281 | my $dimms = {}; |
282 | ||
283 | foreach my $dimm (@$dimmarray) { | |
1e28e8ba | 284 | next if $type && $dimm->{data}->{id} !~ /^$type(\d+)$/; |
6779f1ac AD |
285 | $dimms->{$dimm->{data}->{id}}->{id} = $dimm->{data}->{id}; |
286 | $dimms->{$dimm->{data}->{id}}->{node} = $dimm->{data}->{node}; | |
287 | $dimms->{$dimm->{data}->{id}}->{addr} = $dimm->{data}->{addr}; | |
288 | $dimms->{$dimm->{data}->{id}}->{size} = $dimm->{data}->{size}; | |
289 | $dimms->{$dimm->{data}->{id}}->{slot} = $dimm->{data}->{slot}; | |
290 | } | |
291 | return $dimms; | |
292 | } | |
293 | ||
0567a4d5 | 294 | sub config { |
dafb728c | 295 | my ($conf, $vmid, $sockets, $cores, $defaults, $hotplug, $cmd) = @_; |
a022e3fd | 296 | |
0567a4d5 AD |
297 | my $memory = $conf->{memory} || $defaults->{memory}; |
298 | my $static_memory = 0; | |
0567a4d5 | 299 | |
dafb728c | 300 | if ($hotplug) { |
7023f3ea | 301 | die "NUMA needs to be enabled for memory hotplug\n" if !$conf->{numa}; |
33b0d3b7 | 302 | my $MAX_MEM = get_max_mem($conf); |
0567a4d5 | 303 | die "Total memory is bigger than ${MAX_MEM}MB\n" if $memory > $MAX_MEM; |
456bab54 SR |
304 | |
305 | for (my $i = 0; $i < $MAX_NUMA; $i++) { | |
306 | die "cannot enable memory hotplugging with custom NUMA topology\n" | |
307 | if $conf->{"numa$i"}; | |
308 | } | |
309 | ||
d82ae201 | 310 | my $sockets = $conf->{sockets} || 1; |
7023f3ea | 311 | |
0567a4d5 | 312 | $static_memory = $STATICMEM; |
7023f3ea AD |
313 | $static_memory = $static_memory * $sockets if ($conf->{hugepages} && $conf->{hugepages} == 1024); |
314 | ||
0567a4d5 | 315 | die "minimum memory must be ${static_memory}MB\n" if($memory < $static_memory); |
0567a4d5 AD |
316 | push @$cmd, '-m', "size=${static_memory},slots=255,maxmem=${MAX_MEM}M"; |
317 | ||
318 | } else { | |
319 | ||
320 | $static_memory = $memory; | |
321 | push @$cmd, '-m', $static_memory; | |
322 | } | |
323 | ||
7023f3ea AD |
324 | die "numa needs to be enabled to use hugepages" if $conf->{hugepages} && !$conf->{numa}; |
325 | ||
0567a4d5 AD |
326 | if ($conf->{numa}) { |
327 | ||
328 | my $numa_totalmemory = undef; | |
329 | for (my $i = 0; $i < $MAX_NUMA; $i++) { | |
330 | next if !$conf->{"numa$i"}; | |
0e32bf5b | 331 | my $numa = parse_numa($conf->{"numa$i"}); |
0567a4d5 AD |
332 | next if !$numa; |
333 | # memory | |
334 | die "missing NUMA node$i memory value\n" if !$numa->{memory}; | |
335 | my $numa_memory = $numa->{memory}; | |
336 | $numa_totalmemory += $numa_memory; | |
7023f3ea AD |
337 | |
338 | my $mem_object = print_mem_object($conf, "ram-node$i", $numa_memory); | |
0567a4d5 AD |
339 | |
340 | # cpus | |
341 | my $cpulists = $numa->{cpus}; | |
342 | die "missing NUMA node$i cpus\n" if !defined($cpulists); | |
f612bd67 | 343 | my $cpus = join(',cpus=', map { |
0567a4d5 AD |
344 | my ($start, $end) = @$_; |
345 | defined($end) ? "$start-$end" : $start | |
346 | } @$cpulists); | |
347 | ||
348 | # hostnodes | |
349 | my $hostnodelists = $numa->{hostnodes}; | |
350 | if (defined($hostnodelists)) { | |
ac7b7087 AD |
351 | |
352 | my $hostnodes = print_numa_hostnodes($hostnodelists); | |
0567a4d5 AD |
353 | |
354 | # policy | |
355 | my $policy = $numa->{policy}; | |
356 | die "you need to define a policy for hostnode $hostnodes\n" if !$policy; | |
7023f3ea AD |
357 | $mem_object .= ",host-nodes=$hostnodes,policy=$policy"; |
358 | } else { | |
359 | die "numa hostnodes need to be defined to use hugepages" if $conf->{hugepages}; | |
0567a4d5 AD |
360 | } |
361 | ||
7023f3ea | 362 | push @$cmd, '-object', $mem_object; |
0567a4d5 AD |
363 | push @$cmd, '-numa', "node,nodeid=$i,cpus=$cpus,memdev=ram-node$i"; |
364 | } | |
365 | ||
366 | die "total memory for NUMA nodes must be equal to vm static memory\n" | |
367 | if $numa_totalmemory && $numa_totalmemory != $static_memory; | |
368 | ||
369 | #if no custom tology, we split memory and cores across numa nodes | |
f7d1505b | 370 | if (!$numa_totalmemory) { |
7023f3ea | 371 | my $numa_memory = ($static_memory / $sockets); |
0567a4d5 AD |
372 | |
373 | for (my $i = 0; $i < $sockets; $i++) { | |
2166f6a9 AD |
374 | die "host NUMA node$i doesn't exist\n" |
375 | if !host_numanode_exists($i) && $conf->{hugepages}; | |
0567a4d5 | 376 | |
7023f3ea | 377 | my $mem_object = print_mem_object($conf, "ram-node$i", $numa_memory); |
7023f3ea | 378 | push @$cmd, '-object', $mem_object; |
f7d1505b TL |
379 | |
380 | my $cpus = ($cores * $i); | |
381 | $cpus .= "-" . ($cpus + $cores - 1) if $cores > 1; | |
382 | ||
0567a4d5 AD |
383 | push @$cmd, '-numa', "node,nodeid=$i,cpus=$cpus,memdev=ram-node$i"; |
384 | } | |
385 | } | |
386 | } | |
387 | ||
dafb728c | 388 | if ($hotplug) { |
a132d50e | 389 | foreach_dimm($conf, $vmid, $memory, $static_memory, sub { |
0567a4d5 | 390 | my ($conf, $vmid, $name, $dimm_size, $numanode, $current_size, $memory) = @_; |
7023f3ea AD |
391 | |
392 | my $mem_object = print_mem_object($conf, "mem-$name", $dimm_size); | |
393 | ||
394 | push @$cmd, "-object" , $mem_object; | |
0567a4d5 AD |
395 | push @$cmd, "-device", "pc-dimm,id=$name,memdev=mem-$name,node=$numanode"; |
396 | ||
746232ee SR |
397 | die "memory size ($memory) must be aligned to $dimm_size for hotplugging\n" |
398 | if $current_size > $memory; | |
0567a4d5 AD |
399 | }); |
400 | } | |
401 | } | |
402 | ||
7023f3ea AD |
403 | sub print_mem_object { |
404 | my ($conf, $id, $size) = @_; | |
405 | ||
406 | if ($conf->{hugepages}) { | |
407 | ||
408 | my $hugepages_size = hugepages_size($conf, $size); | |
409 | my $path = hugepages_mount_path($hugepages_size); | |
410 | ||
411 | return "memory-backend-file,id=$id,size=${size}M,mem-path=$path,share=on,prealloc=yes"; | |
412 | } else { | |
413 | return "memory-backend-ram,id=$id,size=${size}M"; | |
414 | } | |
0567a4d5 | 415 | |
7023f3ea AD |
416 | } |
417 | ||
ac7b7087 AD |
418 | sub print_numa_hostnodes { |
419 | my ($hostnodelists) = @_; | |
420 | ||
421 | my $hostnodes; | |
422 | foreach my $hostnoderange (@$hostnodelists) { | |
423 | my ($start, $end) = @$hostnoderange; | |
424 | $hostnodes .= ',' if $hostnodes; | |
425 | $hostnodes .= $start; | |
426 | $hostnodes .= "-$end" if defined($end); | |
427 | $end //= $start; | |
428 | for (my $i = $start; $i <= $end; ++$i ) { | |
2166f6a9 | 429 | die "host NUMA node$i doesn't exist\n" if !host_numanode_exists($i); |
ac7b7087 AD |
430 | } |
431 | } | |
432 | return $hostnodes; | |
433 | } | |
434 | ||
7023f3ea AD |
435 | sub hugepages_mount { |
436 | ||
437 | my $mountdata = PVE::ProcFSTools::parse_proc_mounts(); | |
438 | ||
439 | foreach my $size (qw(2048 1048576)) { | |
3d8d2e8d | 440 | next if (! -d "/sys/kernel/mm/hugepages/hugepages-${size}kB"); |
7023f3ea AD |
441 | |
442 | my $path = "/run/hugepages/kvm/${size}kB"; | |
443 | ||
444 | my $found = grep { | |
445 | $_->[2] =~ /^hugetlbfs/ && | |
446 | $_->[1] eq $path | |
447 | } @$mountdata; | |
448 | ||
449 | if (!$found) { | |
450 | ||
451 | File::Path::make_path($path) if (!-d $path); | |
452 | my $cmd = ['/bin/mount', '-t', 'hugetlbfs', '-o', "pagesize=${size}k", 'hugetlbfs', $path]; | |
453 | run_command($cmd, errmsg => "hugepage mount error"); | |
454 | } | |
455 | } | |
456 | } | |
457 | ||
458 | sub hugepages_mount_path { | |
459 | my ($size) = @_; | |
460 | ||
461 | $size = $size * 1024; | |
462 | return "/run/hugepages/kvm/${size}kB"; | |
463 | ||
464 | } | |
465 | ||
466 | sub hugepages_nr { | |
467 | my ($size, $hugepages_size) = @_; | |
468 | ||
469 | return $size / $hugepages_size; | |
470 | } | |
471 | ||
2166f6a9 AD |
472 | sub hugepages_chunk_size_supported { |
473 | my ($size) = @_; | |
474 | ||
475 | return -d "/sys/kernel/mm/hugepages/hugepages-". ($size * 1024) ."kB"; | |
476 | } | |
477 | ||
7023f3ea | 478 | sub hugepages_size { |
71aba4ea TL |
479 | my ($conf, $size) = @_; |
480 | die "hugepages option is not enabled" if !$conf->{hugepages}; | |
481 | die "memory size '$size' is not a positive even integer; cannot use for hugepages\n" | |
482 | if $size <= 0 || $size & 1; | |
7023f3ea | 483 | |
2166f6a9 AD |
484 | die "your system doesn't support hugepages\n" |
485 | if !hugepages_chunk_size_supported(2) && !hugepages_chunk_size_supported(1024); | |
7023f3ea | 486 | |
71aba4ea | 487 | if ($conf->{hugepages} eq 'any') { |
7023f3ea | 488 | |
71aba4ea | 489 | # try to use 1GB if available && memory size is matching |
2166f6a9 | 490 | if (hugepages_chunk_size_supported(1024) && ($size & 1023) == 0) { |
7023f3ea | 491 | return 1024; |
2166f6a9 | 492 | } elsif (hugepages_chunk_size_supported(2)) { |
7023f3ea | 493 | return 2; |
71aba4ea TL |
494 | } else { |
495 | die "host only supports 1024 GB hugepages, but requested size '$size' is not a multiple of 1024 MB\n" | |
7023f3ea | 496 | } |
71aba4ea | 497 | } else { |
7023f3ea | 498 | |
93981fa7 | 499 | my $hugepagesize = $conf->{hugepages}; |
7023f3ea | 500 | |
2166f6a9 | 501 | if (!hugepages_chunk_size_supported($hugepagesize)) { |
93981fa7 TL |
502 | die "your system doesn't support hugepages of $hugepagesize MB\n"; |
503 | } elsif (($size % $hugepagesize) != 0) { | |
504 | die "Memory size $size is not a multiple of the requested hugepages size $hugepagesize\n"; | |
7023f3ea | 505 | } |
93981fa7 TL |
506 | |
507 | return $hugepagesize | |
71aba4ea | 508 | } |
7023f3ea AD |
509 | } |
510 | ||
511 | sub hugepages_topology { | |
dafb728c | 512 | my ($conf, $hotplug) = @_; |
7023f3ea AD |
513 | |
514 | my $hugepages_topology = {}; | |
515 | ||
516 | return if !$conf->{numa}; | |
517 | ||
518 | my $defaults = PVE::QemuServer::load_defaults(); | |
519 | my $memory = $conf->{memory} || $defaults->{memory}; | |
520 | my $static_memory = 0; | |
d82ae201 | 521 | my $sockets = $conf->{sockets} || 1; |
7023f3ea | 522 | my $numa_custom_topology = undef; |
7023f3ea | 523 | |
dafb728c | 524 | if ($hotplug) { |
7023f3ea AD |
525 | $static_memory = $STATICMEM; |
526 | $static_memory = $static_memory * $sockets if ($conf->{hugepages} && $conf->{hugepages} == 1024); | |
527 | } else { | |
528 | $static_memory = $memory; | |
529 | } | |
530 | ||
531 | #custom numa topology | |
532 | for (my $i = 0; $i < $MAX_NUMA; $i++) { | |
533 | next if !$conf->{"numa$i"}; | |
0e32bf5b | 534 | my $numa = parse_numa($conf->{"numa$i"}); |
7023f3ea AD |
535 | next if !$numa; |
536 | ||
537 | $numa_custom_topology = 1; | |
538 | my $numa_memory = $numa->{memory}; | |
ac7b7087 AD |
539 | my $hostnodelists = $numa->{hostnodes}; |
540 | my $hostnodes = print_numa_hostnodes($hostnodelists); | |
7023f3ea | 541 | |
ac7b7087 | 542 | die "more than 1 hostnode value in numa node is not supported when hugepages are enabled" if $hostnodes !~ m/^(\d)$/; |
7023f3ea | 543 | my $hugepages_size = hugepages_size($conf, $numa_memory); |
ac7b7087 | 544 | $hugepages_topology->{$hugepages_size}->{$hostnodes} += hugepages_nr($numa_memory, $hugepages_size); |
7023f3ea AD |
545 | |
546 | } | |
547 | ||
548 | #if no custom numa tology, we split memory and cores across numa nodes | |
549 | if(!$numa_custom_topology) { | |
550 | ||
551 | my $numa_memory = ($static_memory / $sockets); | |
552 | ||
553 | for (my $i = 0; $i < $sockets; $i++) { | |
554 | ||
555 | my $hugepages_size = hugepages_size($conf, $numa_memory); | |
556 | $hugepages_topology->{$hugepages_size}->{$i} += hugepages_nr($numa_memory, $hugepages_size); | |
557 | } | |
558 | } | |
559 | ||
dafb728c | 560 | if ($hotplug) { |
aaff69ad WB |
561 | my $numa_hostmap = get_numa_guest_to_host_map($conf); |
562 | ||
a132d50e | 563 | foreach_dimm($conf, undef, $memory, $static_memory, sub { |
7023f3ea AD |
564 | my ($conf, undef, $name, $dimm_size, $numanode, $current_size, $memory) = @_; |
565 | ||
aaff69ad WB |
566 | $numanode = $numa_hostmap->{$numanode}; |
567 | ||
7023f3ea AD |
568 | my $hugepages_size = hugepages_size($conf, $dimm_size); |
569 | $hugepages_topology->{$hugepages_size}->{$numanode} += hugepages_nr($dimm_size, $hugepages_size); | |
570 | }); | |
571 | } | |
572 | ||
573 | return $hugepages_topology; | |
574 | } | |
575 | ||
576 | sub hugepages_host_topology { | |
577 | ||
578 | #read host hugepages | |
579 | my $hugepages_host_topology = {}; | |
580 | ||
581 | dir_glob_foreach("/sys/devices/system/node/", 'node(\d+)', sub { | |
582 | my ($nodepath, $numanode) = @_; | |
583 | ||
584 | dir_glob_foreach("/sys/devices/system/node/$nodepath/hugepages/", 'hugepages\-(\d+)kB', sub { | |
585 | my ($hugepages_path, $hugepages_size) = @_; | |
586 | ||
587 | $hugepages_size = $hugepages_size / 1024; | |
588 | my $hugepages_nr = PVE::Tools::file_read_firstline("/sys/devices/system/node/$nodepath/hugepages/$hugepages_path/nr_hugepages"); | |
589 | $hugepages_host_topology->{$hugepages_size}->{$numanode} = $hugepages_nr; | |
590 | }); | |
591 | }); | |
592 | ||
593 | return $hugepages_host_topology; | |
594 | } | |
595 | ||
596 | sub hugepages_allocate { | |
597 | my ($hugepages_topology, $hugepages_host_topology) = @_; | |
598 | ||
599 | #allocate new hupages if needed | |
600 | foreach my $size (sort keys %$hugepages_topology) { | |
601 | ||
602 | my $nodes = $hugepages_topology->{$size}; | |
603 | ||
604 | foreach my $numanode (keys %$nodes) { | |
605 | ||
606 | my $hugepages_size = $size * 1024; | |
607 | my $hugepages_requested = $hugepages_topology->{$size}->{$numanode}; | |
608 | my $path = "/sys/devices/system/node/node${numanode}/hugepages/hugepages-${hugepages_size}kB/"; | |
609 | my $hugepages_free = PVE::Tools::file_read_firstline($path."free_hugepages"); | |
610 | my $hugepages_nr = PVE::Tools::file_read_firstline($path."nr_hugepages"); | |
611 | ||
612 | if ($hugepages_requested > $hugepages_free) { | |
613 | my $hugepages_needed = $hugepages_requested - $hugepages_free; | |
614 | PVE::ProcFSTools::write_proc_entry($path."nr_hugepages", $hugepages_nr + $hugepages_needed); | |
615 | #verify that is correctly allocated | |
616 | $hugepages_free = PVE::Tools::file_read_firstline($path."free_hugepages"); | |
617 | if ($hugepages_free < $hugepages_requested) { | |
618 | #rollback to initial host config | |
619 | hugepages_reset($hugepages_host_topology); | |
620 | die "hugepage allocation failed"; | |
621 | } | |
622 | } | |
623 | ||
624 | } | |
625 | } | |
626 | ||
627 | } | |
628 | ||
ca0ef6b1 KT |
629 | sub hugepages_default_nr_hugepages { |
630 | my ($size) = @_; | |
631 | ||
632 | my $cmdline = PVE::Tools::file_read_firstline("/proc/cmdline"); | |
633 | my $args = PVE::Tools::split_args($cmdline); | |
634 | ||
635 | my $parsed_size = 2; # default is 2M | |
636 | ||
637 | foreach my $arg (@$args) { | |
638 | if ($arg eq "hugepagesz=2M") { | |
639 | $parsed_size = 2; | |
640 | } elsif ($arg eq "hugepagesz=1G") { | |
641 | $parsed_size = 1024; | |
642 | } elsif ($arg =~ m/^hugepages=(\d+)?$/) { | |
643 | if ($parsed_size == $size) { | |
644 | return $1; | |
645 | } | |
646 | } | |
647 | } | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
7023f3ea AD |
652 | sub hugepages_pre_deallocate { |
653 | my ($hugepages_topology) = @_; | |
654 | ||
655 | foreach my $size (sort keys %$hugepages_topology) { | |
656 | ||
657 | my $hugepages_size = $size * 1024; | |
658 | my $path = "/sys/kernel/mm/hugepages/hugepages-${hugepages_size}kB/"; | |
ca0ef6b1 KT |
659 | my $hugepages_nr = hugepages_default_nr_hugepages($size); |
660 | PVE::ProcFSTools::write_proc_entry($path."nr_hugepages", $hugepages_nr); | |
7023f3ea AD |
661 | } |
662 | } | |
663 | ||
664 | sub hugepages_reset { | |
665 | my ($hugepages_topology) = @_; | |
666 | ||
667 | foreach my $size (sort keys %$hugepages_topology) { | |
668 | ||
669 | my $nodes = $hugepages_topology->{$size}; | |
670 | foreach my $numanode (keys %$nodes) { | |
671 | ||
672 | my $hugepages_nr = $hugepages_topology->{$size}->{$numanode}; | |
673 | my $hugepages_size = $size * 1024; | |
674 | my $path = "/sys/devices/system/node/node${numanode}/hugepages/hugepages-${hugepages_size}kB/"; | |
675 | ||
676 | PVE::ProcFSTools::write_proc_entry($path."nr_hugepages", $hugepages_nr); | |
677 | } | |
678 | } | |
679 | } | |
680 | ||
681 | sub hugepages_update_locked { | |
682 | my ($code, @param) = @_; | |
683 | ||
684 | my $timeout = 60; #could be long if a lot of hugepages need to be alocated | |
685 | ||
686 | my $lock_filename = "/var/lock/hugepages.lck"; | |
687 | ||
688 | my $res = lock_file($lock_filename, $timeout, $code, @param); | |
689 | die $@ if $@; | |
690 | ||
691 | return $res; | |
692 | } | |
3f669af2 | 693 | 1; |
a0649da2 | 694 |