2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org>
7 * Copyright (c) 2008 Nokia Corporation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice unmodified, this list of conditions, and the following
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/sysctl.h>
41 #include <sys/ctype.h>
42 #include <sys/sysproto.h>
44 #include <sys/kernel.h>
46 #include <sys/malloc.h>
47 #include <sys/mutex.h>
50 #include <sys/refcount.h>
51 #include <sys/sched.h>
53 #include <sys/syscallsubr.h>
54 #include <sys/capsicum.h>
55 #include <sys/cpuset.h>
56 #include <sys/domainset.h>
58 #include <sys/queue.h>
59 #include <sys/libkern.h>
60 #include <sys/limits.h>
62 #include <sys/interrupt.h>
63 #include <sys/vmmeter.h>
67 #include <vm/vm_object.h>
68 #include <vm/vm_page.h>
69 #include <vm/vm_pageout.h>
70 #include <vm/vm_extern.h>
71 #include <vm/vm_param.h>
72 #include <vm/vm_phys.h>
73 #include <vm/vm_pagequeue.h>
80 * cpusets provide a mechanism for creating and manipulating sets of
81 * processors for the purpose of constraining the scheduling of threads to
82 * specific processors.
84 * Each process belongs to an identified set, by default this is set 1. Each
85 * thread may further restrict the cpus it may run on to a subset of this
86 * named set. This creates an anonymous set which other threads and processes
87 * may not join by number.
89 * The named set is referred to herein as the 'base' set to avoid ambiguity.
90 * This set is usually a child of a 'root' set while the anonymous set may
91 * simply be referred to as a mask. In the syscall api these are referred to
92 * as the ROOT, CPUSET, and MASK levels where CPUSET is called 'base' here.
94 * Threads inherit their set from their creator whether it be anonymous or
95 * not. This means that anonymous sets are immutable because they may be
96 * shared. To modify an anonymous set a new set is created with the desired
97 * mask and the same parent as the existing anonymous set. This gives the
98 * illusion of each thread having a private mask.
100 * Via the syscall apis a user may ask to retrieve or modify the root, base,
101 * or mask that is discovered via a pid, tid, or setid. Modifying a set
102 * modifies all numbered and anonymous child sets to comply with the new mask.
103 * Modifying a pid or tid's mask applies only to that tid but must still
104 * exist within the assigned parent set.
106 * A thread may not be assigned to a group separate from other threads in
107 * the process. This is to remove ambiguity when the setid is queried with
108 * a pid argument. There is no other technical limitation.
110 * This somewhat complex arrangement is intended to make it easy for
111 * applications to query available processors and bind their threads to
112 * specific processors while also allowing administrators to dynamically
113 * reprovision by changing sets which apply to groups of processes.
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, ...).
121 LIST_HEAD(domainlist, domainset);
122 struct domainset __read_mostly domainset_fixed[MAXMEMDOM];
123 struct domainset __read_mostly domainset_prefer[MAXMEMDOM];
124 struct domainset __read_mostly domainset_roundrobin;
126 static uma_zone_t cpuset_zone;
127 static uma_zone_t domainset_zone;
128 static struct mtx cpuset_lock;
129 static struct setlist cpuset_ids;
130 static struct domainlist cpuset_domains;
131 static struct unrhdr *cpuset_unr;
132 static struct cpuset *cpuset_zero, *cpuset_default, *cpuset_kernel;
133 static struct domainset domainset0, domainset2;
135 /* Return the size of cpuset_t at the kernel level */
136 SYSCTL_INT(_kern_sched, OID_AUTO, cpusetsize, CTLFLAG_RD | CTLFLAG_CAPRD,
137 SYSCTL_NULL_INT_PTR, sizeof(cpuset_t), "sizeof(cpuset_t)");
139 cpuset_t *cpuset_root;
140 cpuset_t cpuset_domain[MAXMEMDOM];
142 static int domainset_valid(const struct domainset *, const struct domainset *);
145 * Find the first non-anonymous set starting from 'set'.
147 static struct cpuset *
148 cpuset_getbase(struct cpuset *set)
151 if (set->cs_id == CPUSET_INVALID)
152 set = set->cs_parent;
157 * Walks up the tree from 'set' to find the root.
159 static struct cpuset *
160 cpuset_getroot(struct cpuset *set)
163 while ((set->cs_flags & CPU_SET_ROOT) == 0 && set->cs_parent != NULL)
164 set = set->cs_parent;
169 * Acquire a reference to a cpuset, all pointers must be tracked with refs.
172 cpuset_ref(struct cpuset *set)
175 refcount_acquire(&set->cs_ref);
180 * Walks up the tree from 'set' to find the root. Returns the root
183 static struct cpuset *
184 cpuset_refroot(struct cpuset *set)
187 return (cpuset_ref(cpuset_getroot(set)));
191 * Find the first non-anonymous set starting from 'set'. Returns this set
192 * referenced. May return the passed in set with an extra ref if it is
195 static struct cpuset *
196 cpuset_refbase(struct cpuset *set)
199 return (cpuset_ref(cpuset_getbase(set)));
203 * Release a reference in a context where it is safe to allocate.
206 cpuset_rel(struct cpuset *set)
210 if (refcount_release(&set->cs_ref) == 0)
212 mtx_lock_spin(&cpuset_lock);
213 LIST_REMOVE(set, cs_siblings);
215 if (id != CPUSET_INVALID)
216 LIST_REMOVE(set, cs_link);
217 mtx_unlock_spin(&cpuset_lock);
218 cpuset_rel(set->cs_parent);
219 uma_zfree(cpuset_zone, set);
220 if (id != CPUSET_INVALID)
221 free_unr(cpuset_unr, id);
225 * Deferred release must be used when in a context that is not safe to
226 * allocate/free. This places any unreferenced sets on the list 'head'.
229 cpuset_rel_defer(struct setlist *head, struct cpuset *set)
232 if (refcount_release(&set->cs_ref) == 0)
234 mtx_lock_spin(&cpuset_lock);
235 LIST_REMOVE(set, cs_siblings);
236 if (set->cs_id != CPUSET_INVALID)
237 LIST_REMOVE(set, cs_link);
238 LIST_INSERT_HEAD(head, set, cs_link);
239 mtx_unlock_spin(&cpuset_lock);
243 * Complete a deferred release. Removes the set from the list provided to
247 cpuset_rel_complete(struct cpuset *set)
252 LIST_REMOVE(set, cs_link);
253 cpuset_rel(set->cs_parent);
254 uma_zfree(cpuset_zone, set);
255 if (id != CPUSET_INVALID)
256 free_unr(cpuset_unr, id);
260 * Find a set based on an id. Returns it with a ref.
262 static struct cpuset *
263 cpuset_lookup(cpusetid_t setid, struct thread *td)
267 if (setid == CPUSET_INVALID)
269 mtx_lock_spin(&cpuset_lock);
270 LIST_FOREACH(set, &cpuset_ids, cs_link)
271 if (set->cs_id == setid)
275 mtx_unlock_spin(&cpuset_lock);
277 KASSERT(td != NULL, ("[%s:%d] td is NULL", __func__, __LINE__));
278 if (set != NULL && jailed(td->td_ucred)) {
279 struct cpuset *jset, *tset;
281 jset = td->td_ucred->cr_prison->pr_cpuset;
282 for (tset = set; tset != NULL; tset = tset->cs_parent)
295 * Initialize a set in the space provided in 'set' with the provided parameters.
296 * The set is returned with a single ref. May return EDEADLK if the set
297 * will have no valid cpu based on restrictions from the parent.
300 cpuset_init(struct cpuset *set, struct cpuset *parent,
301 const cpuset_t *mask, struct domainset *domain, cpusetid_t id)
305 domain = parent->cs_domain;
307 mask = &parent->cs_mask;
308 if (!CPU_OVERLAP(&parent->cs_mask, mask))
310 /* The domain must be prepared ahead of time. */
311 if (!domainset_valid(parent->cs_domain, domain))
313 CPU_COPY(mask, &set->cs_mask);
314 LIST_INIT(&set->cs_children);
315 refcount_init(&set->cs_ref, 1);
317 mtx_lock_spin(&cpuset_lock);
318 set->cs_domain = domain;
319 CPU_AND(&set->cs_mask, &parent->cs_mask);
321 set->cs_parent = cpuset_ref(parent);
322 LIST_INSERT_HEAD(&parent->cs_children, set, cs_siblings);
323 if (set->cs_id != CPUSET_INVALID)
324 LIST_INSERT_HEAD(&cpuset_ids, set, cs_link);
325 mtx_unlock_spin(&cpuset_lock);
331 * Create a new non-anonymous set with the requested parent and mask. May
332 * return failures if the mask is invalid or a new number can not be
335 * If *setp is not NULL, then it will be used as-is. The caller must take
336 * into account that *setp will be inserted at the head of cpuset_ids and
337 * plan any potentially conflicting cs_link usage accordingly.
340 cpuset_create(struct cpuset **setp, struct cpuset *parent, const cpuset_t *mask)
347 id = alloc_unr(cpuset_unr);
350 dofree = (*setp == NULL);
354 *setp = set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
355 error = cpuset_init(set, parent, mask, NULL, id);
358 free_unr(cpuset_unr, id);
360 uma_zfree(cpuset_zone, set);
366 cpuset_freelist_add(struct setlist *list, int count)
371 for (i = 0; i < count; i++) {
372 set = uma_zalloc(cpuset_zone, M_ZERO | M_WAITOK);
373 LIST_INSERT_HEAD(list, set, cs_link);
378 cpuset_freelist_init(struct setlist *list, int count)
382 cpuset_freelist_add(list, count);
386 cpuset_freelist_free(struct setlist *list)
390 while ((set = LIST_FIRST(list)) != NULL) {
391 LIST_REMOVE(set, cs_link);
392 uma_zfree(cpuset_zone, set);
397 domainset_freelist_add(struct domainlist *list, int count)
399 struct domainset *set;
402 for (i = 0; i < count; i++) {
403 set = uma_zalloc(domainset_zone, M_ZERO | M_WAITOK);
404 LIST_INSERT_HEAD(list, set, ds_link);
409 domainset_freelist_init(struct domainlist *list, int count)
413 domainset_freelist_add(list, count);
417 domainset_freelist_free(struct domainlist *list)
419 struct domainset *set;
421 while ((set = LIST_FIRST(list)) != NULL) {
422 LIST_REMOVE(set, ds_link);
423 uma_zfree(domainset_zone, set);
427 /* Copy a domainset preserving mask and policy. */
429 domainset_copy(const struct domainset *from, struct domainset *to)
432 DOMAINSET_COPY(&from->ds_mask, &to->ds_mask);
433 to->ds_policy = from->ds_policy;
434 to->ds_prefer = from->ds_prefer;
437 /* Return 1 if mask and policy are equal, otherwise 0. */
439 domainset_equal(const struct domainset *one, const struct domainset *two)
442 return (DOMAINSET_CMP(&one->ds_mask, &two->ds_mask) == 0 &&
443 one->ds_policy == two->ds_policy &&
444 one->ds_prefer == two->ds_prefer);
447 /* Return 1 if child is a valid subset of parent. */
449 domainset_valid(const struct domainset *parent, const struct domainset *child)
451 if (child->ds_policy != DOMAINSET_POLICY_PREFER)
452 return (DOMAINSET_SUBSET(&parent->ds_mask, &child->ds_mask));
453 return (DOMAINSET_ISSET(child->ds_prefer, &parent->ds_mask));
457 domainset_restrict(const struct domainset *parent,
458 const struct domainset *child)
460 if (child->ds_policy != DOMAINSET_POLICY_PREFER)
461 return (DOMAINSET_OVERLAP(&parent->ds_mask, &child->ds_mask));
462 return (DOMAINSET_ISSET(child->ds_prefer, &parent->ds_mask));
466 * Lookup or create a domainset. The key is provided in ds_mask and
467 * ds_policy. If the domainset does not yet exist the storage in
468 * 'domain' is used to insert. Otherwise this storage is freed to the
469 * domainset_zone and the existing domainset is returned.
471 static struct domainset *
472 _domainset_create(struct domainset *domain, struct domainlist *freelist)
474 struct domainset *ndomain;
477 KASSERT(domain->ds_cnt <= vm_ndomains,
478 ("invalid domain count in domainset %p", domain));
479 KASSERT(domain->ds_policy != DOMAINSET_POLICY_PREFER ||
480 domain->ds_prefer < vm_ndomains,
481 ("invalid preferred domain in domains %p", domain));
483 mtx_lock_spin(&cpuset_lock);
484 LIST_FOREACH(ndomain, &cpuset_domains, ds_link)
485 if (domainset_equal(ndomain, domain))
488 * If the domain does not yet exist we insert it and initialize
489 * various iteration helpers which are not part of the key.
491 if (ndomain == NULL) {
492 LIST_INSERT_HEAD(&cpuset_domains, domain, ds_link);
493 domain->ds_cnt = DOMAINSET_COUNT(&domain->ds_mask);
494 for (i = 0, j = 0; i < DOMAINSET_FLS(&domain->ds_mask); i++)
495 if (DOMAINSET_ISSET(i, &domain->ds_mask))
496 domain->ds_order[j++] = i;
498 mtx_unlock_spin(&cpuset_lock);
501 if (freelist != NULL)
502 LIST_INSERT_HEAD(freelist, domain, ds_link);
504 uma_zfree(domainset_zone, domain);
510 * Are any of the domains in the mask empty? If so, silently
511 * remove them and update the domainset accordingly. If only empty
512 * domains are present, we must return failure.
515 domainset_empty_vm(struct domainset *domain)
520 DOMAINSET_ZERO(&empty);
521 for (i = 0; i < vm_ndomains; i++)
522 if (VM_DOMAIN_EMPTY(i))
523 DOMAINSET_SET(i, &empty);
524 if (DOMAINSET_SUBSET(&empty, &domain->ds_mask))
527 /* Remove empty domains from the set and recompute. */
528 DOMAINSET_ANDNOT(&domain->ds_mask, &empty);
529 domain->ds_cnt = DOMAINSET_COUNT(&domain->ds_mask);
530 for (i = j = 0; i < DOMAINSET_FLS(&domain->ds_mask); i++)
531 if (DOMAINSET_ISSET(i, &domain->ds_mask))
532 domain->ds_order[j++] = i;
534 /* Convert a PREFER policy referencing an empty domain to RR. */
535 if (domain->ds_policy == DOMAINSET_POLICY_PREFER &&
536 DOMAINSET_ISSET(domain->ds_prefer, &empty)) {
537 domain->ds_policy = DOMAINSET_POLICY_ROUNDROBIN;
538 domain->ds_prefer = -1;
545 * Create or lookup a domainset based on the key held in 'domain'.
548 domainset_create(const struct domainset *domain)
550 struct domainset *ndomain;
553 * Validate the policy. It must specify a useable policy number with
554 * only valid domains. Preferred must include the preferred domain
557 if (domain->ds_policy <= DOMAINSET_POLICY_INVALID ||
558 domain->ds_policy > DOMAINSET_POLICY_MAX)
560 if (domain->ds_policy == DOMAINSET_POLICY_PREFER &&
561 !DOMAINSET_ISSET(domain->ds_prefer, &domain->ds_mask))
563 if (!DOMAINSET_SUBSET(&domainset0.ds_mask, &domain->ds_mask))
565 ndomain = uma_zalloc(domainset_zone, M_WAITOK | M_ZERO);
566 domainset_copy(domain, ndomain);
567 return _domainset_create(ndomain, NULL);
571 * Update thread domainset pointers.
574 domainset_notify(void)
579 sx_slock(&allproc_lock);
580 FOREACH_PROC_IN_SYSTEM(p) {
582 if (p->p_state == PRS_NEW) {
586 FOREACH_THREAD_IN_PROC(p, td) {
588 td->td_domain.dr_policy = td->td_cpuset->cs_domain;
593 sx_sunlock(&allproc_lock);
594 kernel_object->domain.dr_policy = cpuset_kernel->cs_domain;
598 * Create a new set that is a subset of a parent.
600 static struct domainset *
601 domainset_shadow(const struct domainset *pdomain,
602 const struct domainset *domain, struct domainlist *freelist)
604 struct domainset *ndomain;
606 ndomain = LIST_FIRST(freelist);
607 LIST_REMOVE(ndomain, ds_link);
610 * Initialize the key from the request.
612 domainset_copy(domain, ndomain);
615 * Restrict the key by the parent.
617 DOMAINSET_AND(&ndomain->ds_mask, &pdomain->ds_mask);
619 return _domainset_create(ndomain, freelist);
623 * Recursively check for errors that would occur from applying mask to
624 * the tree of sets starting at 'set'. Checks for sets that would become
625 * empty as well as RDONLY flags.
628 cpuset_testupdate(struct cpuset *set, cpuset_t *mask, int check_mask)
634 mtx_assert(&cpuset_lock, MA_OWNED);
635 if (set->cs_flags & CPU_SET_RDONLY)
638 if (!CPU_OVERLAP(&set->cs_mask, mask))
640 CPU_COPY(&set->cs_mask, &newmask);
641 CPU_AND(&newmask, mask);
643 CPU_COPY(mask, &newmask);
645 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
646 if ((error = cpuset_testupdate(nset, &newmask, 1)) != 0)
652 * Applies the mask 'mask' without checking for empty sets or permissions.
655 cpuset_update(struct cpuset *set, cpuset_t *mask)
659 mtx_assert(&cpuset_lock, MA_OWNED);
660 CPU_AND(&set->cs_mask, mask);
661 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
662 cpuset_update(nset, &set->cs_mask);
668 * Modify the set 'set' to use a copy of the mask provided. Apply this new
669 * mask to restrict all children in the tree. Checks for validity before
670 * applying the changes.
673 cpuset_modify(struct cpuset *set, cpuset_t *mask)
678 error = priv_check(curthread, PRIV_SCHED_CPUSET);
682 * In case we are called from within the jail
683 * we do not allow modifying the dedicated root
684 * cpuset of the jail but may still allow to
687 if (jailed(curthread->td_ucred) &&
688 set->cs_flags & CPU_SET_ROOT)
691 * Verify that we have access to this set of
694 root = cpuset_getroot(set);
695 mtx_lock_spin(&cpuset_lock);
696 if (root && !CPU_SUBSET(&root->cs_mask, mask)) {
700 error = cpuset_testupdate(set, mask, 0);
703 CPU_COPY(mask, &set->cs_mask);
704 cpuset_update(set, mask);
706 mtx_unlock_spin(&cpuset_lock);
712 * Recursively check for errors that would occur from applying mask to
713 * the tree of sets starting at 'set'. Checks for sets that would become
714 * empty as well as RDONLY flags.
717 cpuset_testupdate_domain(struct cpuset *set, struct domainset *dset,
718 struct domainset *orig, int *count, int check_mask)
721 struct domainset *domain;
722 struct domainset newset;
725 mtx_assert(&cpuset_lock, MA_OWNED);
726 if (set->cs_flags & CPU_SET_RDONLY)
728 domain = set->cs_domain;
729 domainset_copy(domain, &newset);
730 if (!domainset_equal(domain, orig)) {
731 if (!domainset_restrict(domain, dset))
733 DOMAINSET_AND(&newset.ds_mask, &dset->ds_mask);
734 /* Count the number of domains that are changing. */
738 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
739 if ((error = cpuset_testupdate_domain(nset, &newset, domain,
746 * Applies the mask 'mask' without checking for empty sets or permissions.
749 cpuset_update_domain(struct cpuset *set, struct domainset *domain,
750 struct domainset *orig, struct domainlist *domains)
754 mtx_assert(&cpuset_lock, MA_OWNED);
756 * If this domainset has changed from the parent we must calculate
757 * a new set. Otherwise it simply inherits from the parent. When
758 * we inherit from the parent we get a new mask and policy. If the
759 * set is modified from the parent we keep the policy and only
762 if (set->cs_domain != orig) {
763 orig = set->cs_domain;
764 set->cs_domain = domainset_shadow(domain, orig, domains);
766 set->cs_domain = domain;
767 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
768 cpuset_update_domain(nset, set->cs_domain, orig, domains);
774 * Modify the set 'set' to use a copy the domainset provided. Apply this new
775 * mask to restrict all children in the tree. Checks for validity before
776 * applying the changes.
779 cpuset_modify_domain(struct cpuset *set, struct domainset *domain)
781 struct domainlist domains;
782 struct domainset temp;
783 struct domainset *dset;
785 int ndomains, needed;
788 error = priv_check(curthread, PRIV_SCHED_CPUSET);
792 * In case we are called from within the jail
793 * we do not allow modifying the dedicated root
794 * cpuset of the jail but may still allow to
797 if (jailed(curthread->td_ucred) &&
798 set->cs_flags & CPU_SET_ROOT)
800 domainset_freelist_init(&domains, 0);
801 domain = domainset_create(domain);
804 mtx_lock_spin(&cpuset_lock);
806 root = cpuset_getroot(set);
807 dset = root->cs_domain;
809 * Verify that we have access to this set of domains.
811 if (!domainset_valid(dset, domain)) {
816 * If applying prefer we keep the current set as the fallback.
818 if (domain->ds_policy == DOMAINSET_POLICY_PREFER)
819 DOMAINSET_COPY(&set->cs_domain->ds_mask,
822 * Determine whether we can apply this set of domains and
823 * how many new domain structures it will require.
825 domainset_copy(domain, &temp);
827 error = cpuset_testupdate_domain(set, &temp, set->cs_domain,
831 if (ndomains >= needed)
834 /* Dropping the lock; we'll need to re-evaluate again. */
835 mtx_unlock_spin(&cpuset_lock);
836 domainset_freelist_add(&domains, needed - ndomains);
838 mtx_lock_spin(&cpuset_lock);
840 dset = set->cs_domain;
841 cpuset_update_domain(set, domain, dset, &domains);
843 mtx_unlock_spin(&cpuset_lock);
844 domainset_freelist_free(&domains);
852 * Resolve the 'which' parameter of several cpuset apis.
854 * For WHICH_PID and WHICH_TID return a locked proc and valid proc/tid. Also
855 * checks for permission via p_cansched().
857 * For WHICH_SET returns a valid set with a new reference.
859 * -1 may be supplied for any argument to mean the current proc/thread or
860 * the base set of the current thread. May fail with ESRCH/EPERM.
863 cpuset_which(cpuwhich_t which, id_t id, struct proc **pp, struct thread **tdp,
864 struct cpuset **setp)
881 if ((p = pfind(id)) == NULL)
896 case CPU_WHICH_CPUSET:
898 thread_lock(curthread);
899 set = cpuset_refbase(curthread->td_cpuset);
900 thread_unlock(curthread);
902 set = cpuset_lookup(id, curthread);
910 /* Find `set' for prison with given id. */
913 sx_slock(&allprison_lock);
914 pr = prison_find_child(curthread->td_ucred->cr_prison, id);
915 sx_sunlock(&allprison_lock);
918 cpuset_ref(pr->pr_cpuset);
919 *setp = pr->pr_cpuset;
920 mtx_unlock(&pr->pr_mtx);
924 case CPU_WHICH_DOMAIN:
929 error = p_cansched(curthread, p);
935 td = FIRST_THREAD_IN_PROC(p);
942 cpuset_testshadow(struct cpuset *set, const cpuset_t *mask,
943 const struct domainset *domain)
945 struct cpuset *parent;
946 struct domainset *dset;
948 parent = cpuset_getbase(set);
950 * If we are restricting a cpu mask it must be a subset of the
951 * parent or invalid CPUs have been specified.
953 if (mask != NULL && !CPU_SUBSET(&parent->cs_mask, mask))
957 * If we are restricting a domain mask it must be a subset of the
958 * parent or invalid domains have been specified.
960 dset = parent->cs_domain;
961 if (domain != NULL && !domainset_valid(dset, domain))
968 * Create an anonymous set with the provided mask in the space provided by
969 * 'nset'. If the passed in set is anonymous we use its parent otherwise
970 * the new set is a child of 'set'.
973 cpuset_shadow(struct cpuset *set, struct cpuset **nsetp,
974 const cpuset_t *mask, const struct domainset *domain,
975 struct setlist *cpusets, struct domainlist *domains)
977 struct cpuset *parent;
979 struct domainset *dset;
983 error = cpuset_testshadow(set, mask, domain);
987 parent = cpuset_getbase(set);
988 dset = parent->cs_domain;
990 mask = &set->cs_mask;
992 d = domainset_shadow(dset, domain, domains);
995 nset = LIST_FIRST(cpusets);
996 error = cpuset_init(nset, parent, mask, d, CPUSET_INVALID);
998 LIST_REMOVE(nset, cs_link);
1004 static struct cpuset *
1005 cpuset_update_thread(struct thread *td, struct cpuset *nset)
1007 struct cpuset *tdset;
1009 tdset = td->td_cpuset;
1010 td->td_cpuset = nset;
1011 td->td_domain.dr_policy = nset->cs_domain;
1018 cpuset_setproc_test_maskthread(struct cpuset *tdset, cpuset_t *mask,
1019 struct domainset *domain)
1021 struct cpuset *parent;
1023 parent = cpuset_getbase(tdset);
1025 mask = &tdset->cs_mask;
1027 domain = tdset->cs_domain;
1028 return cpuset_testshadow(parent, mask, domain);
1032 cpuset_setproc_maskthread(struct cpuset *tdset, cpuset_t *mask,
1033 struct domainset *domain, struct cpuset **nsetp,
1034 struct setlist *freelist, struct domainlist *domainlist)
1036 struct cpuset *parent;
1038 parent = cpuset_getbase(tdset);
1040 mask = &tdset->cs_mask;
1042 domain = tdset->cs_domain;
1043 return cpuset_shadow(parent, nsetp, mask, domain, freelist,
1048 cpuset_setproc_setthread_mask(struct cpuset *tdset, struct cpuset *set,
1049 cpuset_t *mask, struct domainset *domain)
1051 struct cpuset *parent;
1053 parent = cpuset_getbase(tdset);
1056 * If the thread restricted its mask then apply that same
1057 * restriction to the new set, otherwise take it wholesale.
1059 if (CPU_CMP(&tdset->cs_mask, &parent->cs_mask) != 0) {
1060 CPU_COPY(&tdset->cs_mask, mask);
1061 CPU_AND(mask, &set->cs_mask);
1063 CPU_COPY(&set->cs_mask, mask);
1066 * If the thread restricted the domain then we apply the
1067 * restriction to the new set but retain the policy.
1069 if (tdset->cs_domain != parent->cs_domain) {
1070 domainset_copy(tdset->cs_domain, domain);
1071 DOMAINSET_AND(&domain->ds_mask, &set->cs_domain->ds_mask);
1073 domainset_copy(set->cs_domain, domain);
1075 if (CPU_EMPTY(mask) || DOMAINSET_EMPTY(&domain->ds_mask))
1082 cpuset_setproc_test_setthread(struct cpuset *tdset, struct cpuset *set)
1084 struct domainset domain;
1087 if (tdset->cs_id != CPUSET_INVALID)
1089 return cpuset_setproc_setthread_mask(tdset, set, &mask, &domain);
1093 cpuset_setproc_setthread(struct cpuset *tdset, struct cpuset *set,
1094 struct cpuset **nsetp, struct setlist *freelist,
1095 struct domainlist *domainlist)
1097 struct domainset domain;
1102 * If we're replacing on a thread that has not constrained the
1103 * original set we can simply accept the new set.
1105 if (tdset->cs_id != CPUSET_INVALID) {
1106 *nsetp = cpuset_ref(set);
1109 error = cpuset_setproc_setthread_mask(tdset, set, &mask, &domain);
1113 return cpuset_shadow(set, nsetp, &mask, &domain, freelist,
1118 cpuset_setproc_newbase(struct thread *td, struct cpuset *set,
1119 struct cpuset *nroot, struct cpuset **nsetp,
1120 struct setlist *cpusets, struct domainlist *domainlist)
1122 struct domainset ndomain;
1124 struct cpuset *pbase;
1127 pbase = cpuset_getbase(td->td_cpuset);
1129 /* Copy process mask, then further apply the new root mask. */
1130 CPU_COPY(&pbase->cs_mask, &nmask);
1131 CPU_AND(&nmask, &nroot->cs_mask);
1133 domainset_copy(pbase->cs_domain, &ndomain);
1134 DOMAINSET_AND(&ndomain.ds_mask, &set->cs_domain->ds_mask);
1136 /* Policy is too restrictive, will not work. */
1137 if (CPU_EMPTY(&nmask) || DOMAINSET_EMPTY(&ndomain.ds_mask))
1141 * Remove pbase from the freelist in advance, it'll be pushed to
1142 * cpuset_ids on success. We assume here that cpuset_create() will not
1143 * touch pbase on failure, and we just enqueue it back to the freelist
1144 * to remain in a consistent state.
1146 pbase = LIST_FIRST(cpusets);
1147 LIST_REMOVE(pbase, cs_link);
1148 error = cpuset_create(&pbase, set, &nmask);
1150 LIST_INSERT_HEAD(cpusets, pbase, cs_link);
1154 /* Duplicates some work from above... oh well. */
1155 pbase->cs_domain = domainset_shadow(set->cs_domain, &ndomain,
1162 * Handle four cases for updating an entire process.
1164 * 1) Set is non-null and the process is not rebasing onto a new root. This
1165 * reparents all anonymous sets to the provided set and replaces all
1166 * non-anonymous td_cpusets with the provided set.
1167 * 2) Set is non-null and the process is rebasing onto a new root. This
1168 * creates a new base set if the process previously had its own base set,
1169 * then reparents all anonymous sets either to that set or the provided set
1170 * if one was not created. Non-anonymous sets are similarly replaced.
1171 * 3) Mask is non-null. This replaces or creates anonymous sets for every
1172 * thread with the existing base as a parent.
1173 * 4) domain is non-null. This creates anonymous sets for every thread
1174 * and replaces the domain set.
1176 * This is overly complicated because we can't allocate while holding a
1177 * spinlock and spinlocks must be held while changing and examining thread
1181 cpuset_setproc(pid_t pid, struct cpuset *set, cpuset_t *mask,
1182 struct domainset *domain, bool rebase)
1184 struct setlist freelist;
1185 struct setlist droplist;
1186 struct domainlist domainlist;
1187 struct cpuset *base, *nset, *nroot, *tdroot;
1195 * The algorithm requires two passes due to locking considerations.
1197 * 1) Lookup the process and acquire the locks in the required order.
1198 * 2) If enough cpusets have not been allocated release the locks and
1199 * allocate them. Loop.
1201 cpuset_freelist_init(&freelist, 1);
1202 domainset_freelist_init(&domainlist, 1);
1204 LIST_INIT(&droplist);
1209 nroot = cpuset_getroot(set);
1211 error = cpuset_which(CPU_WHICH_PID, pid, &p, &td, &nset);
1214 tdroot = cpuset_getroot(td->td_cpuset);
1215 needed = p->p_numthreads;
1216 if (set != NULL && rebase && tdroot != nroot)
1218 if (nfree >= needed)
1221 if (nfree < needed) {
1222 cpuset_freelist_add(&freelist, needed - nfree);
1223 domainset_freelist_add(&domainlist, needed - nfree);
1227 PROC_LOCK_ASSERT(p, MA_OWNED);
1230 * If we're changing roots and the root set is what has been specified
1231 * as the parent, then we'll check if the process was previously using
1232 * the root set and, if it wasn't, create a new base with the process's
1233 * mask applied to it.
1235 if (set != NULL && rebase && nroot != tdroot) {
1236 cpusetid_t base_id, root_id;
1238 root_id = td->td_ucred->cr_prison->pr_cpuset->cs_id;
1239 base_id = cpuset_getbase(td->td_cpuset)->cs_id;
1241 if (base_id != root_id) {
1242 error = cpuset_setproc_newbase(td, set, nroot, &base,
1243 &freelist, &domainlist);
1250 * Now that the appropriate locks are held and we have enough cpusets,
1251 * make sure the operation will succeed before applying changes. The
1252 * proc lock prevents td_cpuset from changing between calls.
1255 FOREACH_THREAD_IN_PROC(p, td) {
1258 error = cpuset_setproc_test_setthread(td->td_cpuset,
1261 error = cpuset_setproc_test_maskthread(td->td_cpuset,
1268 * Replace each thread's cpuset while using deferred release. We
1269 * must do this because the thread lock must be held while operating
1270 * on the thread and this limits the type of operations allowed.
1272 FOREACH_THREAD_IN_PROC(p, td) {
1275 error = cpuset_setproc_setthread(td->td_cpuset, base,
1276 &nset, &freelist, &domainlist);
1278 error = cpuset_setproc_maskthread(td->td_cpuset, mask,
1279 domain, &nset, &freelist, &domainlist);
1284 cpuset_rel_defer(&droplist, cpuset_update_thread(td, nset));
1290 if (base != NULL && base != set)
1292 while ((nset = LIST_FIRST(&droplist)) != NULL)
1293 cpuset_rel_complete(nset);
1294 cpuset_freelist_free(&freelist);
1295 domainset_freelist_free(&domainlist);
1300 bitset_strprint(char *buf, size_t bufsiz, const struct bitset *set, int setlen)
1308 for (i = 0; i < __bitset_words(setlen); i++) {
1317 if (bufsiz < sizeof(__STRING(ULONG_MAX)))
1319 bytes = snprintf(p, bufsiz, "%lx", set->__bits[i]);
1327 bitset_strscan(struct bitset *set, int setlen, const char *buf)
1332 BIT_ZERO(setlen, set);
1334 for (i = 0; i < __bitset_words(setlen); i++) {
1339 ret = sscanf(p, "%lx", &set->__bits[i]);
1340 if (ret == 0 || ret == -1)
1342 while (isxdigit(*p))
1349 * Return a string representing a valid layout for a cpuset_t object.
1350 * It expects an incoming buffer at least sized as CPUSETBUFSIZ.
1353 cpusetobj_strprint(char *buf, const cpuset_t *set)
1356 bitset_strprint(buf, CPUSETBUFSIZ, (const struct bitset *)set,
1362 * Build a valid cpuset_t object from a string representation.
1363 * It expects an incoming buffer at least sized as CPUSETBUFSIZ.
1366 cpusetobj_strscan(cpuset_t *set, const char *buf)
1370 if (strlen(buf) > CPUSETBUFSIZ - 1)
1373 p = buf[bitset_strscan((struct bitset *)set, CPU_SETSIZE, buf)];
1381 * Handle a domainset specifier in the sysctl tree. A poiner to a pointer to
1382 * a domainset is in arg1. If the user specifies a valid domainset the
1383 * pointer is updated.
1386 * hex mask word 0,hex mask word 1,...:decimal policy:decimal preferred
1389 sysctl_handle_domainset(SYSCTL_HANDLER_ARGS)
1391 char buf[DOMAINSETBUFSIZ];
1392 struct domainset *dset;
1393 struct domainset key;
1394 int policy, prefer, error;
1397 dset = *(struct domainset **)arg1;
1401 p = buf + bitset_strprint(buf, DOMAINSETBUFSIZ,
1402 (const struct bitset *)&dset->ds_mask, DOMAINSET_SETSIZE);
1403 sprintf(p, ":%d:%d", dset->ds_policy, dset->ds_prefer);
1405 sprintf(buf, "<NULL>");
1406 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
1407 if (error != 0 || req->newptr == NULL)
1411 * Read in and validate the string.
1413 memset(&key, 0, sizeof(key));
1414 p = &buf[bitset_strscan((struct bitset *)&key.ds_mask,
1415 DOMAINSET_SETSIZE, buf)];
1418 if (sscanf(p, ":%d:%d", &policy, &prefer) != 2)
1420 key.ds_policy = policy;
1421 key.ds_prefer = prefer;
1423 /* Domainset_create() validates the policy.*/
1424 dset = domainset_create(&key);
1427 *(struct domainset **)arg1 = dset;
1433 * Apply an anonymous mask or a domain to a single thread.
1436 _cpuset_setthread(lwpid_t id, cpuset_t *mask, struct domainset *domain)
1438 struct setlist cpusets;
1439 struct domainlist domainlist;
1440 struct cpuset *nset;
1446 cpuset_freelist_init(&cpusets, 1);
1447 domainset_freelist_init(&domainlist, domain != NULL);
1448 error = cpuset_which(CPU_WHICH_TID, id, &p, &td, &set);
1453 error = cpuset_shadow(td->td_cpuset, &nset, mask, domain,
1454 &cpusets, &domainlist);
1456 set = cpuset_update_thread(td, nset);
1462 cpuset_freelist_free(&cpusets);
1463 domainset_freelist_free(&domainlist);
1468 * Apply an anonymous mask to a single thread.
1471 cpuset_setthread(lwpid_t id, cpuset_t *mask)
1474 return _cpuset_setthread(id, mask, NULL);
1478 * Apply new cpumask to the ithread.
1481 cpuset_setithread(lwpid_t id, int cpu)
1487 CPU_COPY(cpuset_root, &mask);
1489 CPU_SET(cpu, &mask);
1490 return _cpuset_setthread(id, &mask, NULL);
1494 * Initialize static domainsets after NUMA information is available. This is
1495 * called before memory allocators are initialized.
1498 domainset_init(void)
1500 struct domainset *dset;
1503 dset = &domainset_roundrobin;
1504 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1505 dset->ds_policy = DOMAINSET_POLICY_ROUNDROBIN;
1506 dset->ds_prefer = -1;
1507 _domainset_create(dset, NULL);
1509 for (i = 0; i < vm_ndomains; i++) {
1510 dset = &domainset_fixed[i];
1511 DOMAINSET_ZERO(&dset->ds_mask);
1512 DOMAINSET_SET(i, &dset->ds_mask);
1513 dset->ds_policy = DOMAINSET_POLICY_ROUNDROBIN;
1514 _domainset_create(dset, NULL);
1516 dset = &domainset_prefer[i];
1517 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1518 dset->ds_policy = DOMAINSET_POLICY_PREFER;
1519 dset->ds_prefer = i;
1520 _domainset_create(dset, NULL);
1525 * Create the domainset for cpuset 0, 1 and cpuset 2.
1528 domainset_zero(void)
1530 struct domainset *dset, *tmp;
1532 mtx_init(&cpuset_lock, "cpuset", NULL, MTX_SPIN | MTX_RECURSE);
1535 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1536 dset->ds_policy = DOMAINSET_POLICY_FIRSTTOUCH;
1537 dset->ds_prefer = -1;
1538 curthread->td_domain.dr_policy = _domainset_create(dset, NULL);
1540 domainset_copy(dset, &domainset2);
1541 domainset2.ds_policy = DOMAINSET_POLICY_INTERLEAVE;
1542 kernel_object->domain.dr_policy = _domainset_create(&domainset2, NULL);
1544 /* Remove empty domains from the global policies. */
1545 LIST_FOREACH_SAFE(dset, &cpuset_domains, ds_link, tmp)
1546 if (domainset_empty_vm(dset))
1547 LIST_REMOVE(dset, ds_link);
1551 * Creates system-wide cpusets and the cpuset for thread0 including three
1554 * 0 - The root set which should represent all valid processors in the
1555 * system. This set is immutable.
1556 * 1 - The default set which all processes are a member of until changed.
1557 * This allows an administrator to move all threads off of given cpus to
1558 * dedicate them to high priority tasks or save power etc.
1559 * 2 - The kernel set which allows restriction and policy to be applied only
1560 * to kernel threads and the kernel_object.
1563 cpuset_thread0(void)
1569 cpuset_zone = uma_zcreate("cpuset", sizeof(struct cpuset), NULL, NULL,
1570 NULL, NULL, UMA_ALIGN_CACHE, 0);
1571 domainset_zone = uma_zcreate("domainset", sizeof(struct domainset),
1572 NULL, NULL, NULL, NULL, UMA_ALIGN_CACHE, 0);
1575 * Create the root system set (0) for the whole machine. Doesn't use
1576 * cpuset_create() due to NULL parent.
1578 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1579 CPU_COPY(&all_cpus, &set->cs_mask);
1580 LIST_INIT(&set->cs_children);
1581 LIST_INSERT_HEAD(&cpuset_ids, set, cs_link);
1582 refcount_init(&set->cs_ref, 1);
1583 set->cs_flags = CPU_SET_ROOT | CPU_SET_RDONLY;
1584 set->cs_domain = &domainset0;
1586 cpuset_root = &set->cs_mask;
1589 * Now derive a default (1), modifiable set from that to give out.
1591 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1592 error = cpuset_init(set, cpuset_zero, NULL, NULL, 1);
1593 KASSERT(error == 0, ("Error creating default set: %d\n", error));
1594 cpuset_default = set;
1596 * Create the kernel set (2).
1598 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1599 error = cpuset_init(set, cpuset_zero, NULL, NULL, 2);
1600 KASSERT(error == 0, ("Error creating kernel set: %d\n", error));
1601 set->cs_domain = &domainset2;
1602 cpuset_kernel = set;
1605 * Initialize the unit allocator. 0 and 1 are allocated above.
1607 cpuset_unr = new_unrhdr(3, INT_MAX, NULL);
1610 * If MD code has not initialized per-domain cpusets, place all
1613 for (i = 0; i < MAXMEMDOM; i++)
1614 if (!CPU_EMPTY(&cpuset_domain[i]))
1616 CPU_COPY(&all_cpus, &cpuset_domain[0]);
1619 return (cpuset_default);
1623 cpuset_kernthread(struct thread *td)
1628 set = td->td_cpuset;
1629 td->td_cpuset = cpuset_ref(cpuset_kernel);
1635 * Create a cpuset, which would be cpuset_create() but
1636 * mark the new 'set' as root.
1638 * We are not going to reparent the td to it. Use cpuset_setproc_update_set()
1641 * In case of no error, returns the set in *setp locked with a reference.
1644 cpuset_create_root(struct prison *pr, struct cpuset **setp)
1649 KASSERT(pr != NULL, ("[%s:%d] invalid pr", __func__, __LINE__));
1650 KASSERT(setp != NULL, ("[%s:%d] invalid setp", __func__, __LINE__));
1653 error = cpuset_create(&set, pr->pr_cpuset, &pr->pr_cpuset->cs_mask);
1657 KASSERT(set != NULL, ("[%s:%d] cpuset_create returned invalid data",
1658 __func__, __LINE__));
1660 /* Mark the set as root. */
1661 set->cs_flags |= CPU_SET_ROOT;
1668 cpuset_setproc_update_set(struct proc *p, struct cpuset *set)
1672 KASSERT(p != NULL, ("[%s:%d] invalid proc", __func__, __LINE__));
1673 KASSERT(set != NULL, ("[%s:%d] invalid set", __func__, __LINE__));
1676 error = cpuset_setproc(p->p_pid, set, NULL, NULL, true);
1684 * In Capability mode, the only accesses that are permitted are to the current
1685 * thread and process' CPU and domain sets.
1688 cpuset_check_capabilities(struct thread *td, cpulevel_t level, cpuwhich_t which,
1691 if (IN_CAPABILITY_MODE(td)) {
1692 if (level != CPU_LEVEL_WHICH)
1694 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
1697 !(which == CPU_WHICH_TID && id == td->td_tid) &&
1698 !(which == CPU_WHICH_PID && id == td->td_proc->p_pid))
1704 #ifndef _SYS_SYSPROTO_H_
1705 struct cpuset_args {
1710 sys_cpuset(struct thread *td, struct cpuset_args *uap)
1712 struct cpuset *root;
1717 root = cpuset_refroot(td->td_cpuset);
1720 error = cpuset_create(&set, root, &root->cs_mask);
1724 error = copyout(&set->cs_id, uap->setid, sizeof(set->cs_id));
1726 error = cpuset_setproc(-1, set, NULL, NULL, false);
1731 #ifndef _SYS_SYSPROTO_H_
1732 struct cpuset_setid_args {
1739 sys_cpuset_setid(struct thread *td, struct cpuset_setid_args *uap)
1742 return (kern_cpuset_setid(td, uap->which, uap->id, uap->setid));
1746 kern_cpuset_setid(struct thread *td, cpuwhich_t which,
1747 id_t id, cpusetid_t setid)
1753 * Presently we only support per-process sets.
1755 if (which != CPU_WHICH_PID)
1757 set = cpuset_lookup(setid, td);
1760 error = cpuset_setproc(id, set, NULL, NULL, false);
1765 #ifndef _SYS_SYSPROTO_H_
1766 struct cpuset_getid_args {
1774 sys_cpuset_getid(struct thread *td, struct cpuset_getid_args *uap)
1777 return (kern_cpuset_getid(td, uap->level, uap->which, uap->id,
1782 kern_cpuset_getid(struct thread *td, cpulevel_t level, cpuwhich_t which,
1783 id_t id, cpusetid_t *setid)
1785 struct cpuset *nset;
1792 if (level == CPU_LEVEL_WHICH && which != CPU_WHICH_CPUSET)
1794 error = cpuset_which(which, id, &p, &ttd, &set);
1801 set = cpuset_refbase(ttd->td_cpuset);
1805 case CPU_WHICH_CPUSET:
1806 case CPU_WHICH_JAIL:
1809 case CPU_WHICH_DOMAIN:
1813 case CPU_LEVEL_ROOT:
1814 nset = cpuset_refroot(set);
1818 case CPU_LEVEL_CPUSET:
1820 case CPU_LEVEL_WHICH:
1826 error = copyout(&tmpid, setid, sizeof(tmpid));
1831 #ifndef _SYS_SYSPROTO_H_
1832 struct cpuset_getaffinity_args {
1841 sys_cpuset_getaffinity(struct thread *td, struct cpuset_getaffinity_args *uap)
1844 return (kern_cpuset_getaffinity(td, uap->level, uap->which,
1845 uap->id, uap->cpusetsize, uap->mask));
1849 kern_cpuset_getaffinity(struct thread *td, cpulevel_t level, cpuwhich_t which,
1850 id_t id, size_t cpusetsize, cpuset_t *maskp)
1853 struct cpuset *nset;
1860 if (cpusetsize < sizeof(cpuset_t) || cpusetsize > CPU_MAXSIZE / NBBY)
1862 error = cpuset_check_capabilities(td, level, which, id);
1866 mask = malloc(size, M_TEMP, M_WAITOK | M_ZERO);
1867 error = cpuset_which(which, id, &p, &ttd, &set);
1871 case CPU_LEVEL_ROOT:
1872 case CPU_LEVEL_CPUSET:
1877 set = cpuset_ref(ttd->td_cpuset);
1880 case CPU_WHICH_CPUSET:
1881 case CPU_WHICH_JAIL:
1884 case CPU_WHICH_INTRHANDLER:
1885 case CPU_WHICH_ITHREAD:
1886 case CPU_WHICH_DOMAIN:
1890 if (level == CPU_LEVEL_ROOT)
1891 nset = cpuset_refroot(set);
1893 nset = cpuset_refbase(set);
1894 CPU_COPY(&nset->cs_mask, mask);
1897 case CPU_LEVEL_WHICH:
1901 CPU_COPY(&ttd->td_cpuset->cs_mask, mask);
1905 FOREACH_THREAD_IN_PROC(p, ttd) {
1907 CPU_OR(mask, &ttd->td_cpuset->cs_mask);
1911 case CPU_WHICH_CPUSET:
1912 case CPU_WHICH_JAIL:
1913 CPU_COPY(&set->cs_mask, mask);
1916 case CPU_WHICH_INTRHANDLER:
1917 case CPU_WHICH_ITHREAD:
1918 error = intr_getaffinity(id, which, mask);
1920 case CPU_WHICH_DOMAIN:
1921 if (id < 0 || id >= MAXMEMDOM)
1924 CPU_COPY(&cpuset_domain[id], mask);
1937 error = copyout(mask, maskp, size);
1943 #ifndef _SYS_SYSPROTO_H_
1944 struct cpuset_setaffinity_args {
1949 const cpuset_t *mask;
1953 sys_cpuset_setaffinity(struct thread *td, struct cpuset_setaffinity_args *uap)
1956 return (kern_cpuset_setaffinity(td, uap->level, uap->which,
1957 uap->id, uap->cpusetsize, uap->mask));
1961 kern_cpuset_setaffinity(struct thread *td, cpulevel_t level, cpuwhich_t which,
1962 id_t id, size_t cpusetsize, const cpuset_t *maskp)
1964 struct cpuset *nset;
1971 if (cpusetsize < sizeof(cpuset_t) || cpusetsize > CPU_MAXSIZE / NBBY)
1973 error = cpuset_check_capabilities(td, level, which, id);
1976 mask = malloc(cpusetsize, M_TEMP, M_WAITOK | M_ZERO);
1977 error = copyin(maskp, mask, cpusetsize);
1981 * Verify that no high bits are set.
1983 if (cpusetsize > sizeof(cpuset_t)) {
1987 end = cp = (char *)&mask->__bits;
1989 cp += sizeof(cpuset_t);
1997 case CPU_LEVEL_ROOT:
1998 case CPU_LEVEL_CPUSET:
1999 error = cpuset_which(which, id, &p, &ttd, &set);
2006 set = cpuset_ref(ttd->td_cpuset);
2010 case CPU_WHICH_CPUSET:
2011 case CPU_WHICH_JAIL:
2014 case CPU_WHICH_INTRHANDLER:
2015 case CPU_WHICH_ITHREAD:
2016 case CPU_WHICH_DOMAIN:
2020 if (level == CPU_LEVEL_ROOT)
2021 nset = cpuset_refroot(set);
2023 nset = cpuset_refbase(set);
2024 error = cpuset_modify(nset, mask);
2028 case CPU_LEVEL_WHICH:
2031 error = cpuset_setthread(id, mask);
2034 error = cpuset_setproc(id, NULL, mask, NULL, false);
2036 case CPU_WHICH_CPUSET:
2037 case CPU_WHICH_JAIL:
2038 error = cpuset_which(which, id, &p, &ttd, &set);
2040 error = cpuset_modify(set, mask);
2045 case CPU_WHICH_INTRHANDLER:
2046 case CPU_WHICH_ITHREAD:
2047 error = intr_setaffinity(id, which, mask);
2063 #ifndef _SYS_SYSPROTO_H_
2064 struct cpuset_getdomain_args {
2068 size_t domainsetsize;
2074 sys_cpuset_getdomain(struct thread *td, struct cpuset_getdomain_args *uap)
2077 return (kern_cpuset_getdomain(td, uap->level, uap->which,
2078 uap->id, uap->domainsetsize, uap->mask, uap->policy));
2082 kern_cpuset_getdomain(struct thread *td, cpulevel_t level, cpuwhich_t which,
2083 id_t id, size_t domainsetsize, domainset_t *maskp, int *policyp)
2085 struct domainset outset;
2087 struct cpuset *nset;
2089 struct domainset *dset;
2094 if (domainsetsize < sizeof(domainset_t) ||
2095 domainsetsize > DOMAINSET_MAXSIZE / NBBY)
2097 error = cpuset_check_capabilities(td, level, which, id);
2100 mask = malloc(domainsetsize, M_TEMP, M_WAITOK | M_ZERO);
2101 bzero(&outset, sizeof(outset));
2102 error = cpuset_which(which, id, &p, &ttd, &set);
2106 case CPU_LEVEL_ROOT:
2107 case CPU_LEVEL_CPUSET:
2112 set = cpuset_ref(ttd->td_cpuset);
2115 case CPU_WHICH_CPUSET:
2116 case CPU_WHICH_JAIL:
2119 case CPU_WHICH_INTRHANDLER:
2120 case CPU_WHICH_ITHREAD:
2121 case CPU_WHICH_DOMAIN:
2125 if (level == CPU_LEVEL_ROOT)
2126 nset = cpuset_refroot(set);
2128 nset = cpuset_refbase(set);
2129 domainset_copy(nset->cs_domain, &outset);
2132 case CPU_LEVEL_WHICH:
2136 domainset_copy(ttd->td_cpuset->cs_domain, &outset);
2140 FOREACH_THREAD_IN_PROC(p, ttd) {
2142 dset = ttd->td_cpuset->cs_domain;
2143 /* Show all domains in the proc. */
2144 DOMAINSET_OR(&outset.ds_mask, &dset->ds_mask);
2145 /* Last policy wins. */
2146 outset.ds_policy = dset->ds_policy;
2147 outset.ds_prefer = dset->ds_prefer;
2151 case CPU_WHICH_CPUSET:
2152 case CPU_WHICH_JAIL:
2153 domainset_copy(set->cs_domain, &outset);
2156 case CPU_WHICH_INTRHANDLER:
2157 case CPU_WHICH_ITHREAD:
2158 case CPU_WHICH_DOMAIN:
2172 * Translate prefer into a set containing only the preferred domain,
2173 * not the entire fallback set.
2175 if (outset.ds_policy == DOMAINSET_POLICY_PREFER) {
2176 DOMAINSET_ZERO(&outset.ds_mask);
2177 DOMAINSET_SET(outset.ds_prefer, &outset.ds_mask);
2179 DOMAINSET_COPY(&outset.ds_mask, mask);
2181 error = copyout(mask, maskp, domainsetsize);
2183 if (suword32(policyp, outset.ds_policy) != 0)
2190 #ifndef _SYS_SYSPROTO_H_
2191 struct cpuset_setdomain_args {
2195 size_t domainsetsize;
2201 sys_cpuset_setdomain(struct thread *td, struct cpuset_setdomain_args *uap)
2204 return (kern_cpuset_setdomain(td, uap->level, uap->which,
2205 uap->id, uap->domainsetsize, uap->mask, uap->policy));
2209 kern_cpuset_setdomain(struct thread *td, cpulevel_t level, cpuwhich_t which,
2210 id_t id, size_t domainsetsize, const domainset_t *maskp, int policy)
2212 struct cpuset *nset;
2216 struct domainset domain;
2220 if (domainsetsize < sizeof(domainset_t) ||
2221 domainsetsize > DOMAINSET_MAXSIZE / NBBY)
2223 if (policy <= DOMAINSET_POLICY_INVALID ||
2224 policy > DOMAINSET_POLICY_MAX)
2226 error = cpuset_check_capabilities(td, level, which, id);
2229 memset(&domain, 0, sizeof(domain));
2230 mask = malloc(domainsetsize, M_TEMP, M_WAITOK | M_ZERO);
2231 error = copyin(maskp, mask, domainsetsize);
2235 * Verify that no high bits are set.
2237 if (domainsetsize > sizeof(domainset_t)) {
2241 end = cp = (char *)&mask->__bits;
2242 end += domainsetsize;
2243 cp += sizeof(domainset_t);
2250 DOMAINSET_COPY(mask, &domain.ds_mask);
2251 domain.ds_policy = policy;
2254 * Sanitize the provided mask.
2256 if (!DOMAINSET_SUBSET(&all_domains, &domain.ds_mask)) {
2261 /* Translate preferred policy into a mask and fallback. */
2262 if (policy == DOMAINSET_POLICY_PREFER) {
2263 /* Only support a single preferred domain. */
2264 if (DOMAINSET_COUNT(&domain.ds_mask) != 1) {
2268 domain.ds_prefer = DOMAINSET_FFS(&domain.ds_mask) - 1;
2269 /* This will be constrained by domainset_shadow(). */
2270 DOMAINSET_COPY(&all_domains, &domain.ds_mask);
2274 * When given an impossible policy, fall back to interleaving
2275 * across all domains.
2277 if (domainset_empty_vm(&domain))
2278 domainset_copy(&domainset2, &domain);
2281 case CPU_LEVEL_ROOT:
2282 case CPU_LEVEL_CPUSET:
2283 error = cpuset_which(which, id, &p, &ttd, &set);
2290 set = cpuset_ref(ttd->td_cpuset);
2294 case CPU_WHICH_CPUSET:
2295 case CPU_WHICH_JAIL:
2298 case CPU_WHICH_INTRHANDLER:
2299 case CPU_WHICH_ITHREAD:
2300 case CPU_WHICH_DOMAIN:
2304 if (level == CPU_LEVEL_ROOT)
2305 nset = cpuset_refroot(set);
2307 nset = cpuset_refbase(set);
2308 error = cpuset_modify_domain(nset, &domain);
2312 case CPU_LEVEL_WHICH:
2315 error = _cpuset_setthread(id, NULL, &domain);
2318 error = cpuset_setproc(id, NULL, NULL, &domain, false);
2320 case CPU_WHICH_CPUSET:
2321 case CPU_WHICH_JAIL:
2322 error = cpuset_which(which, id, &p, &ttd, &set);
2324 error = cpuset_modify_domain(set, &domain);
2329 case CPU_WHICH_INTRHANDLER:
2330 case CPU_WHICH_ITHREAD:
2348 ddb_display_bitset(const struct bitset *set, int size)
2352 for (once = 0, bit = 0; bit < size; bit++) {
2353 if (CPU_ISSET(bit, set)) {
2355 db_printf("%d", bit);
2358 db_printf(",%d", bit);
2362 db_printf("<none>");
2366 ddb_display_cpuset(const cpuset_t *set)
2368 ddb_display_bitset((const struct bitset *)set, CPU_SETSIZE);
2372 ddb_display_domainset(const domainset_t *set)
2374 ddb_display_bitset((const struct bitset *)set, DOMAINSET_SETSIZE);
2377 DB_SHOW_COMMAND(cpusets, db_show_cpusets)
2381 LIST_FOREACH(set, &cpuset_ids, cs_link) {
2382 db_printf("set=%p id=%-6u ref=%-6d flags=0x%04x parent id=%d\n",
2383 set, set->cs_id, refcount_load(&set->cs_ref), set->cs_flags,
2384 (set->cs_parent != NULL) ? set->cs_parent->cs_id : 0);
2385 db_printf(" cpu mask=");
2386 ddb_display_cpuset(&set->cs_mask);
2388 db_printf(" domain policy %d prefer %d mask=",
2389 set->cs_domain->ds_policy, set->cs_domain->ds_prefer);
2390 ddb_display_domainset(&set->cs_domain->ds_mask);
2397 DB_SHOW_COMMAND(domainsets, db_show_domainsets)
2399 struct domainset *set;
2401 LIST_FOREACH(set, &cpuset_domains, ds_link) {
2402 db_printf("set=%p policy %d prefer %d cnt %d\n",
2403 set, set->ds_policy, set->ds_prefer, set->ds_cnt);
2404 db_printf(" mask =");
2405 ddb_display_domainset(&set->ds_mask);