kern_cpuset.c (01d4e2149e5566e5d9394913dc9fb032da259e0b) kern_cpuset.c (662e7fa8d9fb296379f594ebb6a7f231c1ea8a2f)
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org>
5 * All rights reserved.
6 *
7 * Copyright (c) 2008 Nokia Corporation
8 * All rights reserved.

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114 *
115 * A simple application should not concern itself with sets at all and
116 * rather apply masks to its own threads via CPU_WHICH_TID and a -1 id
117 * meaning 'curthread'. It may query available cpus for that tid with a
118 * getaffinity call using (CPU_LEVEL_CPUSET, CPU_WHICH_PID, -1, ...).
119 */
120
121LIST_HEAD(domainlist, domainset);
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org>
5 * All rights reserved.
6 *
7 * Copyright (c) 2008 Nokia Corporation
8 * All rights reserved.

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114 *
115 * A simple application should not concern itself with sets at all and
116 * rather apply masks to its own threads via CPU_WHICH_TID and a -1 id
117 * meaning 'curthread'. It may query available cpus for that tid with a
118 * getaffinity call using (CPU_LEVEL_CPUSET, CPU_WHICH_PID, -1, ...).
119 */
120
121LIST_HEAD(domainlist, domainset);
122struct domainset __read_mostly domainset_prefer[MAXMEMDOM];
123struct domainset __read_mostly domainset_roundrobin;
122
123static uma_zone_t cpuset_zone;
124static uma_zone_t domainset_zone;
125static struct mtx cpuset_lock;
126static struct setlist cpuset_ids;
127static struct domainlist cpuset_domains;
128static struct unrhdr *cpuset_unr;
129static struct cpuset *cpuset_zero, *cpuset_default, *cpuset_kernel;

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1364 if (cpu == NOCPU)
1365 CPU_COPY(cpuset_root, &mask);
1366 else
1367 CPU_SET(cpu, &mask);
1368 return _cpuset_setthread(id, &mask, NULL);
1369}
1370
1371/*
124
125static uma_zone_t cpuset_zone;
126static uma_zone_t domainset_zone;
127static struct mtx cpuset_lock;
128static struct setlist cpuset_ids;
129static struct domainlist cpuset_domains;
130static struct unrhdr *cpuset_unr;
131static struct cpuset *cpuset_zero, *cpuset_default, *cpuset_kernel;

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1366 if (cpu == NOCPU)
1367 CPU_COPY(cpuset_root, &mask);
1368 else
1369 CPU_SET(cpu, &mask);
1370 return _cpuset_setthread(id, &mask, NULL);
1371}
1372
1373/*
1374 * Initialize static domainsets after NUMA information is available. This is
1375 * called very early during boot.
1376 */
1377void
1378domainset_init(void)
1379{
1380 struct domainset *dset;
1381 int i;
1382
1383 dset = &domainset_roundrobin;
1384 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1385 dset->ds_policy = DOMAINSET_POLICY_ROUNDROBIN;
1386 dset->ds_prefer = -1;
1387 _domainset_create(dset, NULL);
1388
1389 for (i = 0; i < vm_ndomains; i++) {
1390 dset = &domainset_prefer[i];
1391 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1392 dset->ds_policy = DOMAINSET_POLICY_PREFER;
1393 dset->ds_prefer = i;
1394 _domainset_create(dset, NULL);
1395 }
1396}
1397
1398/*
1372 * Create the domainset for cpuset 0, 1 and cpuset 2.
1373 */
1374void
1375domainset_zero(void)
1376{
1377 struct domainset *dset;
1399 * Create the domainset for cpuset 0, 1 and cpuset 2.
1400 */
1401void
1402domainset_zero(void)
1403{
1404 struct domainset *dset;
1378 int i;
1379
1380 mtx_init(&cpuset_lock, "cpuset", NULL, MTX_SPIN | MTX_RECURSE);
1381
1382 dset = &domainset0;
1405
1406 mtx_init(&cpuset_lock, "cpuset", NULL, MTX_SPIN | MTX_RECURSE);
1407
1408 dset = &domainset0;
1383 DOMAINSET_ZERO(&dset->ds_mask);
1384 for (i = 0; i < vm_ndomains; i++)
1385 DOMAINSET_SET(i, &dset->ds_mask);
1409 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1386 dset->ds_policy = DOMAINSET_POLICY_FIRSTTOUCH;
1387 dset->ds_prefer = -1;
1410 dset->ds_policy = DOMAINSET_POLICY_FIRSTTOUCH;
1411 dset->ds_prefer = -1;
1388 (void)domainset_empty_vm(dset);
1389 curthread->td_domain.dr_policy = _domainset_create(dset, NULL);
1390
1391 domainset_copy(dset, &domainset2);
1392 domainset2.ds_policy = DOMAINSET_POLICY_INTERLEAVE;
1393 kernel_object->domain.dr_policy = _domainset_create(&domainset2, NULL);
1412 curthread->td_domain.dr_policy = _domainset_create(dset, NULL);
1413
1414 domainset_copy(dset, &domainset2);
1415 domainset2.ds_policy = DOMAINSET_POLICY_INTERLEAVE;
1416 kernel_object->domain.dr_policy = _domainset_create(&domainset2, NULL);
1417
1418 /* Remove empty domains from the global policies. */
1419 LIST_FOREACH(dset, &cpuset_domains, ds_link)
1420 (void)domainset_empty_vm(dset);
1394}
1395
1396/*
1397 * Creates system-wide cpusets and the cpuset for thread0 including three
1398 * sets:
1399 *
1400 * 0 - The root set which should represent all valid processors in the
1401 * system. It is initially created with a mask of all processors

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1422
1423/*
1424 * Creates system-wide cpusets and the cpuset for thread0 including three
1425 * sets:
1426 *
1427 * 0 - The root set which should represent all valid processors in the
1428 * system. It is initially created with a mask of all processors

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