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_prefer[MAXMEMDOM];
123 struct domainset __read_mostly domainset_roundrobin;
125 static uma_zone_t cpuset_zone;
126 static uma_zone_t domainset_zone;
127 static struct mtx cpuset_lock;
128 static struct setlist cpuset_ids;
129 static struct domainlist cpuset_domains;
130 static struct unrhdr *cpuset_unr;
131 static struct cpuset *cpuset_zero, *cpuset_default, *cpuset_kernel;
132 static struct domainset domainset0, domainset2;
134 /* Return the size of cpuset_t at the kernel level */
135 SYSCTL_INT(_kern_sched, OID_AUTO, cpusetsize, CTLFLAG_RD | CTLFLAG_CAPRD,
136 SYSCTL_NULL_INT_PTR, sizeof(cpuset_t), "sizeof(cpuset_t)");
138 cpuset_t *cpuset_root;
139 cpuset_t cpuset_domain[MAXMEMDOM];
141 static int domainset_valid(const struct domainset *, const struct domainset *);
144 * Find the first non-anonymous set starting from 'set'.
146 static struct cpuset *
147 cpuset_getbase(struct cpuset *set)
150 if (set->cs_id == CPUSET_INVALID)
151 set = set->cs_parent;
156 * Walks up the tree from 'set' to find the root.
158 static struct cpuset *
159 cpuset_getroot(struct cpuset *set)
162 while ((set->cs_flags & CPU_SET_ROOT) == 0 && set->cs_parent != NULL)
163 set = set->cs_parent;
168 * Acquire a reference to a cpuset, all pointers must be tracked with refs.
171 cpuset_ref(struct cpuset *set)
174 refcount_acquire(&set->cs_ref);
179 * Walks up the tree from 'set' to find the root. Returns the root
182 static struct cpuset *
183 cpuset_refroot(struct cpuset *set)
186 return (cpuset_ref(cpuset_getroot(set)));
190 * Find the first non-anonymous set starting from 'set'. Returns this set
191 * referenced. May return the passed in set with an extra ref if it is
194 static struct cpuset *
195 cpuset_refbase(struct cpuset *set)
198 return (cpuset_ref(cpuset_getbase(set)));
202 * Release a reference in a context where it is safe to allocate.
205 cpuset_rel(struct cpuset *set)
209 if (refcount_release(&set->cs_ref) == 0)
211 mtx_lock_spin(&cpuset_lock);
212 LIST_REMOVE(set, cs_siblings);
214 if (id != CPUSET_INVALID)
215 LIST_REMOVE(set, cs_link);
216 mtx_unlock_spin(&cpuset_lock);
217 cpuset_rel(set->cs_parent);
218 uma_zfree(cpuset_zone, set);
219 if (id != CPUSET_INVALID)
220 free_unr(cpuset_unr, id);
224 * Deferred release must be used when in a context that is not safe to
225 * allocate/free. This places any unreferenced sets on the list 'head'.
228 cpuset_rel_defer(struct setlist *head, struct cpuset *set)
231 if (refcount_release(&set->cs_ref) == 0)
233 mtx_lock_spin(&cpuset_lock);
234 LIST_REMOVE(set, cs_siblings);
235 if (set->cs_id != CPUSET_INVALID)
236 LIST_REMOVE(set, cs_link);
237 LIST_INSERT_HEAD(head, set, cs_link);
238 mtx_unlock_spin(&cpuset_lock);
242 * Complete a deferred release. Removes the set from the list provided to
246 cpuset_rel_complete(struct cpuset *set)
248 LIST_REMOVE(set, cs_link);
249 cpuset_rel(set->cs_parent);
250 uma_zfree(cpuset_zone, set);
254 * Find a set based on an id. Returns it with a ref.
256 static struct cpuset *
257 cpuset_lookup(cpusetid_t setid, struct thread *td)
261 if (setid == CPUSET_INVALID)
263 mtx_lock_spin(&cpuset_lock);
264 LIST_FOREACH(set, &cpuset_ids, cs_link)
265 if (set->cs_id == setid)
269 mtx_unlock_spin(&cpuset_lock);
271 KASSERT(td != NULL, ("[%s:%d] td is NULL", __func__, __LINE__));
272 if (set != NULL && jailed(td->td_ucred)) {
273 struct cpuset *jset, *tset;
275 jset = td->td_ucred->cr_prison->pr_cpuset;
276 for (tset = set; tset != NULL; tset = tset->cs_parent)
289 * Create a set in the space provided in 'set' with the provided parameters.
290 * The set is returned with a single ref. May return EDEADLK if the set
291 * will have no valid cpu based on restrictions from the parent.
294 _cpuset_create(struct cpuset *set, struct cpuset *parent,
295 const cpuset_t *mask, struct domainset *domain, cpusetid_t id)
299 domain = parent->cs_domain;
301 mask = &parent->cs_mask;
302 if (!CPU_OVERLAP(&parent->cs_mask, mask))
304 /* The domain must be prepared ahead of time. */
305 if (!domainset_valid(parent->cs_domain, domain))
307 CPU_COPY(mask, &set->cs_mask);
308 LIST_INIT(&set->cs_children);
309 refcount_init(&set->cs_ref, 1);
311 mtx_lock_spin(&cpuset_lock);
312 set->cs_domain = domain;
313 CPU_AND(&set->cs_mask, &parent->cs_mask);
315 set->cs_parent = cpuset_ref(parent);
316 LIST_INSERT_HEAD(&parent->cs_children, set, cs_siblings);
317 if (set->cs_id != CPUSET_INVALID)
318 LIST_INSERT_HEAD(&cpuset_ids, set, cs_link);
319 mtx_unlock_spin(&cpuset_lock);
325 * Create a new non-anonymous set with the requested parent and mask. May
326 * return failures if the mask is invalid or a new number can not be
330 cpuset_create(struct cpuset **setp, struct cpuset *parent, const cpuset_t *mask)
336 id = alloc_unr(cpuset_unr);
339 *setp = set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
340 error = _cpuset_create(set, parent, mask, NULL, id);
343 free_unr(cpuset_unr, id);
344 uma_zfree(cpuset_zone, set);
350 cpuset_freelist_add(struct setlist *list, int count)
355 for (i = 0; i < count; i++) {
356 set = uma_zalloc(cpuset_zone, M_ZERO | M_WAITOK);
357 LIST_INSERT_HEAD(list, set, cs_link);
362 cpuset_freelist_init(struct setlist *list, int count)
366 cpuset_freelist_add(list, count);
370 cpuset_freelist_free(struct setlist *list)
374 while ((set = LIST_FIRST(list)) != NULL) {
375 LIST_REMOVE(set, cs_link);
376 uma_zfree(cpuset_zone, set);
381 domainset_freelist_add(struct domainlist *list, int count)
383 struct domainset *set;
386 for (i = 0; i < count; i++) {
387 set = uma_zalloc(domainset_zone, M_ZERO | M_WAITOK);
388 LIST_INSERT_HEAD(list, set, ds_link);
393 domainset_freelist_init(struct domainlist *list, int count)
397 domainset_freelist_add(list, count);
401 domainset_freelist_free(struct domainlist *list)
403 struct domainset *set;
405 while ((set = LIST_FIRST(list)) != NULL) {
406 LIST_REMOVE(set, ds_link);
407 uma_zfree(domainset_zone, set);
411 /* Copy a domainset preserving mask and policy. */
413 domainset_copy(const struct domainset *from, struct domainset *to)
416 DOMAINSET_COPY(&from->ds_mask, &to->ds_mask);
417 to->ds_policy = from->ds_policy;
418 to->ds_prefer = from->ds_prefer;
421 /* Return 1 if mask and policy are equal, otherwise 0. */
423 domainset_equal(const struct domainset *one, const struct domainset *two)
426 return (DOMAINSET_CMP(&one->ds_mask, &two->ds_mask) == 0 &&
427 one->ds_policy == two->ds_policy &&
428 one->ds_prefer == two->ds_prefer);
431 /* Return 1 if child is a valid subset of parent. */
433 domainset_valid(const struct domainset *parent, const struct domainset *child)
435 if (child->ds_policy != DOMAINSET_POLICY_PREFER)
436 return (DOMAINSET_SUBSET(&parent->ds_mask, &child->ds_mask));
437 return (DOMAINSET_ISSET(child->ds_prefer, &parent->ds_mask));
441 domainset_restrict(const struct domainset *parent,
442 const struct domainset *child)
444 if (child->ds_policy != DOMAINSET_POLICY_PREFER)
445 return (DOMAINSET_OVERLAP(&parent->ds_mask, &child->ds_mask));
446 return (DOMAINSET_ISSET(child->ds_prefer, &parent->ds_mask));
450 * Lookup or create a domainset. The key is provided in ds_mask and
451 * ds_policy. If the domainset does not yet exist the storage in
452 * 'domain' is used to insert. Otherwise this storage is freed to the
453 * domainset_zone and the existing domainset is returned.
455 static struct domainset *
456 _domainset_create(struct domainset *domain, struct domainlist *freelist)
458 struct domainset *ndomain;
461 KASSERT(domain->ds_cnt <= vm_ndomains,
462 ("invalid domain count in domainset %p", domain));
463 KASSERT(domain->ds_policy != DOMAINSET_POLICY_PREFER ||
464 domain->ds_prefer < vm_ndomains,
465 ("invalid preferred domain in domains %p", domain));
467 mtx_lock_spin(&cpuset_lock);
468 LIST_FOREACH(ndomain, &cpuset_domains, ds_link)
469 if (domainset_equal(ndomain, domain))
472 * If the domain does not yet exist we insert it and initialize
473 * various iteration helpers which are not part of the key.
475 if (ndomain == NULL) {
476 LIST_INSERT_HEAD(&cpuset_domains, domain, ds_link);
477 domain->ds_cnt = DOMAINSET_COUNT(&domain->ds_mask);
478 max = DOMAINSET_FLS(&domain->ds_mask) + 1;
479 for (i = 0, j = 0; i < max; i++)
480 if (DOMAINSET_ISSET(i, &domain->ds_mask))
481 domain->ds_order[j++] = i;
483 mtx_unlock_spin(&cpuset_lock);
486 if (freelist != NULL)
487 LIST_INSERT_HEAD(freelist, domain, ds_link);
489 uma_zfree(domainset_zone, domain);
495 * Are any of the domains in the mask empty? If so, silently
496 * remove them and update the domainset accordingly. If only empty
497 * domains are present, we must return failure.
500 domainset_empty_vm(struct domainset *domain)
504 max = DOMAINSET_FLS(&domain->ds_mask) + 1;
505 for (i = 0; i < max; i++)
506 if (DOMAINSET_ISSET(i, &domain->ds_mask) && VM_DOMAIN_EMPTY(i))
507 DOMAINSET_CLR(i, &domain->ds_mask);
508 domain->ds_cnt = DOMAINSET_COUNT(&domain->ds_mask);
509 max = DOMAINSET_FLS(&domain->ds_mask) + 1;
510 for (i = j = 0; i < max; i++) {
511 if (DOMAINSET_ISSET(i, &domain->ds_mask))
512 domain->ds_order[j++] = i;
513 else if (domain->ds_policy == DOMAINSET_POLICY_PREFER &&
514 domain->ds_prefer == i && domain->ds_cnt > 1) {
515 domain->ds_policy = DOMAINSET_POLICY_ROUNDROBIN;
516 domain->ds_prefer = -1;
520 return (DOMAINSET_EMPTY(&domain->ds_mask));
524 * Create or lookup a domainset based on the key held in 'domain'.
527 domainset_create(const struct domainset *domain)
529 struct domainset *ndomain;
532 * Validate the policy. It must specify a useable policy number with
533 * only valid domains. Preferred must include the preferred domain
536 if (domain->ds_policy <= DOMAINSET_POLICY_INVALID ||
537 domain->ds_policy > DOMAINSET_POLICY_MAX)
539 if (domain->ds_policy == DOMAINSET_POLICY_PREFER &&
540 !DOMAINSET_ISSET(domain->ds_prefer, &domain->ds_mask))
542 if (!DOMAINSET_SUBSET(&domainset0.ds_mask, &domain->ds_mask))
544 ndomain = uma_zalloc(domainset_zone, M_WAITOK | M_ZERO);
545 domainset_copy(domain, ndomain);
546 return _domainset_create(ndomain, NULL);
550 * Update thread domainset pointers.
553 domainset_notify(void)
558 sx_slock(&allproc_lock);
559 FOREACH_PROC_IN_SYSTEM(p) {
561 if (p->p_state == PRS_NEW) {
565 FOREACH_THREAD_IN_PROC(p, td) {
567 td->td_domain.dr_policy = td->td_cpuset->cs_domain;
572 sx_sunlock(&allproc_lock);
573 kernel_object->domain.dr_policy = cpuset_kernel->cs_domain;
577 * Create a new set that is a subset of a parent.
579 static struct domainset *
580 domainset_shadow(const struct domainset *pdomain,
581 const struct domainset *domain, struct domainlist *freelist)
583 struct domainset *ndomain;
585 ndomain = LIST_FIRST(freelist);
586 LIST_REMOVE(ndomain, ds_link);
589 * Initialize the key from the request.
591 domainset_copy(domain, ndomain);
594 * Restrict the key by the parent.
596 DOMAINSET_AND(&ndomain->ds_mask, &pdomain->ds_mask);
598 return _domainset_create(ndomain, freelist);
602 * Recursively check for errors that would occur from applying mask to
603 * the tree of sets starting at 'set'. Checks for sets that would become
604 * empty as well as RDONLY flags.
607 cpuset_testupdate(struct cpuset *set, cpuset_t *mask, int check_mask)
613 mtx_assert(&cpuset_lock, MA_OWNED);
614 if (set->cs_flags & CPU_SET_RDONLY)
617 if (!CPU_OVERLAP(&set->cs_mask, mask))
619 CPU_COPY(&set->cs_mask, &newmask);
620 CPU_AND(&newmask, mask);
622 CPU_COPY(mask, &newmask);
624 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
625 if ((error = cpuset_testupdate(nset, &newmask, 1)) != 0)
631 * Applies the mask 'mask' without checking for empty sets or permissions.
634 cpuset_update(struct cpuset *set, cpuset_t *mask)
638 mtx_assert(&cpuset_lock, MA_OWNED);
639 CPU_AND(&set->cs_mask, mask);
640 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
641 cpuset_update(nset, &set->cs_mask);
647 * Modify the set 'set' to use a copy of the mask provided. Apply this new
648 * mask to restrict all children in the tree. Checks for validity before
649 * applying the changes.
652 cpuset_modify(struct cpuset *set, cpuset_t *mask)
657 error = priv_check(curthread, PRIV_SCHED_CPUSET);
661 * In case we are called from within the jail
662 * we do not allow modifying the dedicated root
663 * cpuset of the jail but may still allow to
666 if (jailed(curthread->td_ucred) &&
667 set->cs_flags & CPU_SET_ROOT)
670 * Verify that we have access to this set of
673 root = cpuset_getroot(set);
674 mtx_lock_spin(&cpuset_lock);
675 if (root && !CPU_SUBSET(&root->cs_mask, mask)) {
679 error = cpuset_testupdate(set, mask, 0);
682 CPU_COPY(mask, &set->cs_mask);
683 cpuset_update(set, mask);
685 mtx_unlock_spin(&cpuset_lock);
691 * Recursively check for errors that would occur from applying mask to
692 * the tree of sets starting at 'set'. Checks for sets that would become
693 * empty as well as RDONLY flags.
696 cpuset_testupdate_domain(struct cpuset *set, struct domainset *dset,
697 struct domainset *orig, int *count, int check_mask)
700 struct domainset *domain;
701 struct domainset newset;
704 mtx_assert(&cpuset_lock, MA_OWNED);
705 if (set->cs_flags & CPU_SET_RDONLY)
707 domain = set->cs_domain;
708 domainset_copy(domain, &newset);
709 if (!domainset_equal(domain, orig)) {
710 if (!domainset_restrict(domain, dset))
712 DOMAINSET_AND(&newset.ds_mask, &dset->ds_mask);
713 /* Count the number of domains that are changing. */
717 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
718 if ((error = cpuset_testupdate_domain(nset, &newset, domain,
725 * Applies the mask 'mask' without checking for empty sets or permissions.
728 cpuset_update_domain(struct cpuset *set, struct domainset *domain,
729 struct domainset *orig, struct domainlist *domains)
733 mtx_assert(&cpuset_lock, MA_OWNED);
735 * If this domainset has changed from the parent we must calculate
736 * a new set. Otherwise it simply inherits from the parent. When
737 * we inherit from the parent we get a new mask and policy. If the
738 * set is modified from the parent we keep the policy and only
741 if (set->cs_domain != orig) {
742 orig = set->cs_domain;
743 set->cs_domain = domainset_shadow(domain, orig, domains);
745 set->cs_domain = domain;
746 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
747 cpuset_update_domain(nset, set->cs_domain, orig, domains);
753 * Modify the set 'set' to use a copy the domainset provided. Apply this new
754 * mask to restrict all children in the tree. Checks for validity before
755 * applying the changes.
758 cpuset_modify_domain(struct cpuset *set, struct domainset *domain)
760 struct domainlist domains;
761 struct domainset temp;
762 struct domainset *dset;
764 int ndomains, needed;
767 error = priv_check(curthread, PRIV_SCHED_CPUSET);
771 * In case we are called from within the jail
772 * we do not allow modifying the dedicated root
773 * cpuset of the jail but may still allow to
776 if (jailed(curthread->td_ucred) &&
777 set->cs_flags & CPU_SET_ROOT)
779 domainset_freelist_init(&domains, 0);
780 domain = domainset_create(domain);
781 ndomains = needed = 0;
783 if (ndomains < needed) {
784 domainset_freelist_add(&domains, needed - ndomains);
787 root = cpuset_getroot(set);
788 mtx_lock_spin(&cpuset_lock);
789 dset = root->cs_domain;
791 * Verify that we have access to this set of domains.
793 if (root && !domainset_valid(dset, domain)) {
798 * If applying prefer we keep the current set as the fallback.
800 if (domain->ds_policy == DOMAINSET_POLICY_PREFER)
801 DOMAINSET_COPY(&set->cs_domain->ds_mask,
804 * Determine whether we can apply this set of domains and
805 * how many new domain structures it will require.
807 domainset_copy(domain, &temp);
809 error = cpuset_testupdate_domain(set, &temp, set->cs_domain,
813 } while (ndomains < needed);
814 dset = set->cs_domain;
815 cpuset_update_domain(set, domain, dset, &domains);
817 mtx_unlock_spin(&cpuset_lock);
818 domainset_freelist_free(&domains);
826 * Resolve the 'which' parameter of several cpuset apis.
828 * For WHICH_PID and WHICH_TID return a locked proc and valid proc/tid. Also
829 * checks for permission via p_cansched().
831 * For WHICH_SET returns a valid set with a new reference.
833 * -1 may be supplied for any argument to mean the current proc/thread or
834 * the base set of the current thread. May fail with ESRCH/EPERM.
837 cpuset_which(cpuwhich_t which, id_t id, struct proc **pp, struct thread **tdp,
838 struct cpuset **setp)
855 if ((p = pfind(id)) == NULL)
870 case CPU_WHICH_CPUSET:
872 thread_lock(curthread);
873 set = cpuset_refbase(curthread->td_cpuset);
874 thread_unlock(curthread);
876 set = cpuset_lookup(id, curthread);
884 /* Find `set' for prison with given id. */
887 sx_slock(&allprison_lock);
888 pr = prison_find_child(curthread->td_ucred->cr_prison, id);
889 sx_sunlock(&allprison_lock);
892 cpuset_ref(pr->pr_cpuset);
893 *setp = pr->pr_cpuset;
894 mtx_unlock(&pr->pr_mtx);
898 case CPU_WHICH_DOMAIN:
903 error = p_cansched(curthread, p);
909 td = FIRST_THREAD_IN_PROC(p);
916 cpuset_testshadow(struct cpuset *set, const cpuset_t *mask,
917 const struct domainset *domain)
919 struct cpuset *parent;
920 struct domainset *dset;
922 parent = cpuset_getbase(set);
924 * If we are restricting a cpu mask it must be a subset of the
925 * parent or invalid CPUs have been specified.
927 if (mask != NULL && !CPU_SUBSET(&parent->cs_mask, mask))
931 * If we are restricting a domain mask it must be a subset of the
932 * parent or invalid domains have been specified.
934 dset = parent->cs_domain;
935 if (domain != NULL && !domainset_valid(dset, domain))
942 * Create an anonymous set with the provided mask in the space provided by
943 * 'nset'. If the passed in set is anonymous we use its parent otherwise
944 * the new set is a child of 'set'.
947 cpuset_shadow(struct cpuset *set, struct cpuset **nsetp,
948 const cpuset_t *mask, const struct domainset *domain,
949 struct setlist *cpusets, struct domainlist *domains)
951 struct cpuset *parent;
953 struct domainset *dset;
957 error = cpuset_testshadow(set, mask, domain);
961 parent = cpuset_getbase(set);
962 dset = parent->cs_domain;
964 mask = &set->cs_mask;
966 d = domainset_shadow(dset, domain, domains);
969 nset = LIST_FIRST(cpusets);
970 error = _cpuset_create(nset, parent, mask, d, CPUSET_INVALID);
972 LIST_REMOVE(nset, cs_link);
978 static struct cpuset *
979 cpuset_update_thread(struct thread *td, struct cpuset *nset)
981 struct cpuset *tdset;
983 tdset = td->td_cpuset;
984 td->td_cpuset = nset;
985 td->td_domain.dr_policy = nset->cs_domain;
992 cpuset_setproc_test_maskthread(struct cpuset *tdset, cpuset_t *mask,
993 struct domainset *domain)
995 struct cpuset *parent;
997 parent = cpuset_getbase(tdset);
999 mask = &tdset->cs_mask;
1001 domain = tdset->cs_domain;
1002 return cpuset_testshadow(parent, mask, domain);
1006 cpuset_setproc_maskthread(struct cpuset *tdset, cpuset_t *mask,
1007 struct domainset *domain, struct cpuset **nsetp,
1008 struct setlist *freelist, struct domainlist *domainlist)
1010 struct cpuset *parent;
1012 parent = cpuset_getbase(tdset);
1014 mask = &tdset->cs_mask;
1016 domain = tdset->cs_domain;
1017 return cpuset_shadow(parent, nsetp, mask, domain, freelist,
1022 cpuset_setproc_setthread_mask(struct cpuset *tdset, struct cpuset *set,
1023 cpuset_t *mask, struct domainset *domain)
1025 struct cpuset *parent;
1027 parent = cpuset_getbase(tdset);
1030 * If the thread restricted its mask then apply that same
1031 * restriction to the new set, otherwise take it wholesale.
1033 if (CPU_CMP(&tdset->cs_mask, &parent->cs_mask) != 0) {
1034 CPU_COPY(&tdset->cs_mask, mask);
1035 CPU_AND(mask, &set->cs_mask);
1037 CPU_COPY(&set->cs_mask, mask);
1040 * If the thread restricted the domain then we apply the
1041 * restriction to the new set but retain the policy.
1043 if (tdset->cs_domain != parent->cs_domain) {
1044 domainset_copy(tdset->cs_domain, domain);
1045 DOMAINSET_AND(&domain->ds_mask, &set->cs_domain->ds_mask);
1047 domainset_copy(set->cs_domain, domain);
1049 if (CPU_EMPTY(mask) || DOMAINSET_EMPTY(&domain->ds_mask))
1056 cpuset_setproc_test_setthread(struct cpuset *tdset, struct cpuset *set)
1058 struct domainset domain;
1061 if (tdset->cs_id != CPUSET_INVALID)
1063 return cpuset_setproc_setthread_mask(tdset, set, &mask, &domain);
1067 cpuset_setproc_setthread(struct cpuset *tdset, struct cpuset *set,
1068 struct cpuset **nsetp, struct setlist *freelist,
1069 struct domainlist *domainlist)
1071 struct domainset domain;
1076 * If we're replacing on a thread that has not constrained the
1077 * original set we can simply accept the new set.
1079 if (tdset->cs_id != CPUSET_INVALID) {
1080 *nsetp = cpuset_ref(set);
1083 error = cpuset_setproc_setthread_mask(tdset, set, &mask, &domain);
1087 return cpuset_shadow(tdset, nsetp, &mask, &domain, freelist,
1092 * Handle three cases for updating an entire process.
1094 * 1) Set is non-null. This reparents all anonymous sets to the provided
1095 * set and replaces all non-anonymous td_cpusets with the provided set.
1096 * 2) Mask is non-null. This replaces or creates anonymous sets for every
1097 * thread with the existing base as a parent.
1098 * 3) domain is non-null. This creates anonymous sets for every thread
1099 * and replaces the domain set.
1101 * This is overly complicated because we can't allocate while holding a
1102 * spinlock and spinlocks must be held while changing and examining thread
1106 cpuset_setproc(pid_t pid, struct cpuset *set, cpuset_t *mask,
1107 struct domainset *domain)
1109 struct setlist freelist;
1110 struct setlist droplist;
1111 struct domainlist domainlist;
1112 struct cpuset *nset;
1120 * The algorithm requires two passes due to locking considerations.
1122 * 1) Lookup the process and acquire the locks in the required order.
1123 * 2) If enough cpusets have not been allocated release the locks and
1124 * allocate them. Loop.
1126 cpuset_freelist_init(&freelist, 1);
1127 domainset_freelist_init(&domainlist, 1);
1129 LIST_INIT(&droplist);
1132 error = cpuset_which(CPU_WHICH_PID, pid, &p, &td, &nset);
1135 if (nfree >= p->p_numthreads)
1137 threads = p->p_numthreads;
1139 if (nfree < threads) {
1140 cpuset_freelist_add(&freelist, threads - nfree);
1141 domainset_freelist_add(&domainlist, threads - nfree);
1145 PROC_LOCK_ASSERT(p, MA_OWNED);
1147 * Now that the appropriate locks are held and we have enough cpusets,
1148 * make sure the operation will succeed before applying changes. The
1149 * proc lock prevents td_cpuset from changing between calls.
1152 FOREACH_THREAD_IN_PROC(p, td) {
1155 error = cpuset_setproc_test_setthread(td->td_cpuset,
1158 error = cpuset_setproc_test_maskthread(td->td_cpuset,
1165 * Replace each thread's cpuset while using deferred release. We
1166 * must do this because the thread lock must be held while operating
1167 * on the thread and this limits the type of operations allowed.
1169 FOREACH_THREAD_IN_PROC(p, td) {
1172 error = cpuset_setproc_setthread(td->td_cpuset, set,
1173 &nset, &freelist, &domainlist);
1175 error = cpuset_setproc_maskthread(td->td_cpuset, mask,
1176 domain, &nset, &freelist, &domainlist);
1181 cpuset_rel_defer(&droplist, cpuset_update_thread(td, nset));
1187 while ((nset = LIST_FIRST(&droplist)) != NULL)
1188 cpuset_rel_complete(nset);
1189 cpuset_freelist_free(&freelist);
1190 domainset_freelist_free(&domainlist);
1195 bitset_strprint(char *buf, size_t bufsiz, const struct bitset *set, int setlen)
1203 for (i = 0; i < __bitset_words(setlen); i++) {
1212 if (bufsiz < sizeof(__STRING(ULONG_MAX)))
1214 bytes = snprintf(p, bufsiz, "%lx", set->__bits[i]);
1222 bitset_strscan(struct bitset *set, int setlen, const char *buf)
1227 BIT_ZERO(setlen, set);
1229 for (i = 0; i < __bitset_words(setlen); i++) {
1234 ret = sscanf(p, "%lx", &set->__bits[i]);
1235 if (ret == 0 || ret == -1)
1237 while (isxdigit(*p))
1244 * Return a string representing a valid layout for a cpuset_t object.
1245 * It expects an incoming buffer at least sized as CPUSETBUFSIZ.
1248 cpusetobj_strprint(char *buf, const cpuset_t *set)
1251 bitset_strprint(buf, CPUSETBUFSIZ, (const struct bitset *)set,
1257 * Build a valid cpuset_t object from a string representation.
1258 * It expects an incoming buffer at least sized as CPUSETBUFSIZ.
1261 cpusetobj_strscan(cpuset_t *set, const char *buf)
1265 if (strlen(buf) > CPUSETBUFSIZ - 1)
1268 p = buf[bitset_strscan((struct bitset *)set, CPU_SETSIZE, buf)];
1276 * Handle a domainset specifier in the sysctl tree. A poiner to a pointer to
1277 * a domainset is in arg1. If the user specifies a valid domainset the
1278 * pointer is updated.
1281 * hex mask word 0,hex mask word 1,...:decimal policy:decimal preferred
1284 sysctl_handle_domainset(SYSCTL_HANDLER_ARGS)
1286 char buf[DOMAINSETBUFSIZ];
1287 struct domainset *dset;
1288 struct domainset key;
1289 int policy, prefer, error;
1292 dset = *(struct domainset **)arg1;
1296 p = buf + bitset_strprint(buf, DOMAINSETBUFSIZ,
1297 (const struct bitset *)&dset->ds_mask, DOMAINSET_SETSIZE);
1298 sprintf(p, ":%d:%d", dset->ds_policy, dset->ds_prefer);
1300 sprintf(buf, "<NULL>");
1301 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
1302 if (error != 0 || req->newptr == NULL)
1306 * Read in and validate the string.
1308 memset(&key, 0, sizeof(key));
1309 p = &buf[bitset_strscan((struct bitset *)&key.ds_mask,
1310 DOMAINSET_SETSIZE, buf)];
1313 if (sscanf(p, ":%d:%d", &policy, &prefer) != 2)
1315 key.ds_policy = policy;
1316 key.ds_prefer = prefer;
1318 /* Domainset_create() validates the policy.*/
1319 dset = domainset_create(&key);
1322 *(struct domainset **)arg1 = dset;
1328 * Apply an anonymous mask or a domain to a single thread.
1331 _cpuset_setthread(lwpid_t id, cpuset_t *mask, struct domainset *domain)
1333 struct setlist cpusets;
1334 struct domainlist domainlist;
1335 struct cpuset *nset;
1341 cpuset_freelist_init(&cpusets, 1);
1342 domainset_freelist_init(&domainlist, domain != NULL);
1343 error = cpuset_which(CPU_WHICH_TID, id, &p, &td, &set);
1348 error = cpuset_shadow(td->td_cpuset, &nset, mask, domain,
1349 &cpusets, &domainlist);
1351 set = cpuset_update_thread(td, nset);
1357 cpuset_freelist_free(&cpusets);
1358 domainset_freelist_free(&domainlist);
1363 * Apply an anonymous mask to a single thread.
1366 cpuset_setthread(lwpid_t id, cpuset_t *mask)
1369 return _cpuset_setthread(id, mask, NULL);
1373 * Apply new cpumask to the ithread.
1376 cpuset_setithread(lwpid_t id, int cpu)
1382 CPU_COPY(cpuset_root, &mask);
1384 CPU_SET(cpu, &mask);
1385 return _cpuset_setthread(id, &mask, NULL);
1389 * Initialize static domainsets after NUMA information is available. This is
1390 * called before memory allocators are initialized.
1393 domainset_init(void)
1395 struct domainset *dset;
1398 dset = &domainset_roundrobin;
1399 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1400 dset->ds_policy = DOMAINSET_POLICY_ROUNDROBIN;
1401 dset->ds_prefer = -1;
1402 _domainset_create(dset, NULL);
1404 for (i = 0; i < vm_ndomains; i++) {
1405 dset = &domainset_prefer[i];
1406 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1407 dset->ds_policy = DOMAINSET_POLICY_PREFER;
1408 dset->ds_prefer = i;
1409 _domainset_create(dset, NULL);
1414 * Create the domainset for cpuset 0, 1 and cpuset 2.
1417 domainset_zero(void)
1419 struct domainset *dset, *tmp;
1421 mtx_init(&cpuset_lock, "cpuset", NULL, MTX_SPIN | MTX_RECURSE);
1424 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1425 dset->ds_policy = DOMAINSET_POLICY_FIRSTTOUCH;
1426 dset->ds_prefer = -1;
1427 curthread->td_domain.dr_policy = _domainset_create(dset, NULL);
1429 domainset_copy(dset, &domainset2);
1430 domainset2.ds_policy = DOMAINSET_POLICY_INTERLEAVE;
1431 kernel_object->domain.dr_policy = _domainset_create(&domainset2, NULL);
1433 /* Remove empty domains from the global policies. */
1434 LIST_FOREACH_SAFE(dset, &cpuset_domains, ds_link, tmp)
1435 if (domainset_empty_vm(dset))
1436 LIST_REMOVE(dset, ds_link);
1440 * Creates system-wide cpusets and the cpuset for thread0 including three
1443 * 0 - The root set which should represent all valid processors in the
1444 * system. It is initially created with a mask of all processors
1445 * because we don't know what processors are valid until cpuset_init()
1446 * runs. This set is immutable.
1447 * 1 - The default set which all processes are a member of until changed.
1448 * This allows an administrator to move all threads off of given cpus to
1449 * dedicate them to high priority tasks or save power etc.
1450 * 2 - The kernel set which allows restriction and policy to be applied only
1451 * to kernel threads and the kernel_object.
1454 cpuset_thread0(void)
1460 cpuset_zone = uma_zcreate("cpuset", sizeof(struct cpuset), NULL, NULL,
1461 NULL, NULL, UMA_ALIGN_CACHE, 0);
1462 domainset_zone = uma_zcreate("domainset", sizeof(struct domainset),
1463 NULL, NULL, NULL, NULL, UMA_ALIGN_CACHE, 0);
1466 * Create the root system set (0) for the whole machine. Doesn't use
1467 * cpuset_create() due to NULL parent.
1469 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1470 CPU_COPY(&all_cpus, &set->cs_mask);
1471 LIST_INIT(&set->cs_children);
1472 LIST_INSERT_HEAD(&cpuset_ids, set, cs_link);
1474 set->cs_flags = CPU_SET_ROOT | CPU_SET_RDONLY;
1475 set->cs_domain = &domainset0;
1477 cpuset_root = &set->cs_mask;
1480 * Now derive a default (1), modifiable set from that to give out.
1482 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1483 error = _cpuset_create(set, cpuset_zero, NULL, NULL, 1);
1484 KASSERT(error == 0, ("Error creating default set: %d\n", error));
1485 cpuset_default = set;
1487 * Create the kernel set (2).
1489 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1490 error = _cpuset_create(set, cpuset_zero, NULL, NULL, 2);
1491 KASSERT(error == 0, ("Error creating kernel set: %d\n", error));
1492 set->cs_domain = &domainset2;
1493 cpuset_kernel = set;
1496 * Initialize the unit allocator. 0 and 1 are allocated above.
1498 cpuset_unr = new_unrhdr(2, INT_MAX, NULL);
1501 * If MD code has not initialized per-domain cpusets, place all
1504 for (i = 0; i < MAXMEMDOM; i++)
1505 if (!CPU_EMPTY(&cpuset_domain[i]))
1507 CPU_COPY(&all_cpus, &cpuset_domain[0]);
1510 return (cpuset_default);
1514 cpuset_kernthread(struct thread *td)
1519 set = td->td_cpuset;
1520 td->td_cpuset = cpuset_ref(cpuset_kernel);
1526 * Create a cpuset, which would be cpuset_create() but
1527 * mark the new 'set' as root.
1529 * We are not going to reparent the td to it. Use cpuset_setproc_update_set()
1532 * In case of no error, returns the set in *setp locked with a reference.
1535 cpuset_create_root(struct prison *pr, struct cpuset **setp)
1540 KASSERT(pr != NULL, ("[%s:%d] invalid pr", __func__, __LINE__));
1541 KASSERT(setp != NULL, ("[%s:%d] invalid setp", __func__, __LINE__));
1543 error = cpuset_create(setp, pr->pr_cpuset, &pr->pr_cpuset->cs_mask);
1547 KASSERT(*setp != NULL, ("[%s:%d] cpuset_create returned invalid data",
1548 __func__, __LINE__));
1550 /* Mark the set as root. */
1552 set->cs_flags |= CPU_SET_ROOT;
1558 cpuset_setproc_update_set(struct proc *p, struct cpuset *set)
1562 KASSERT(p != NULL, ("[%s:%d] invalid proc", __func__, __LINE__));
1563 KASSERT(set != NULL, ("[%s:%d] invalid set", __func__, __LINE__));
1566 error = cpuset_setproc(p->p_pid, set, NULL, NULL);
1573 #ifndef _SYS_SYSPROTO_H_
1574 struct cpuset_args {
1579 sys_cpuset(struct thread *td, struct cpuset_args *uap)
1581 struct cpuset *root;
1586 root = cpuset_refroot(td->td_cpuset);
1588 error = cpuset_create(&set, root, &root->cs_mask);
1592 error = copyout(&set->cs_id, uap->setid, sizeof(set->cs_id));
1594 error = cpuset_setproc(-1, set, NULL, NULL);
1599 #ifndef _SYS_SYSPROTO_H_
1600 struct cpuset_setid_args {
1607 sys_cpuset_setid(struct thread *td, struct cpuset_setid_args *uap)
1610 return (kern_cpuset_setid(td, uap->which, uap->id, uap->setid));
1614 kern_cpuset_setid(struct thread *td, cpuwhich_t which,
1615 id_t id, cpusetid_t setid)
1621 * Presently we only support per-process sets.
1623 if (which != CPU_WHICH_PID)
1625 set = cpuset_lookup(setid, td);
1628 error = cpuset_setproc(id, set, NULL, NULL);
1633 #ifndef _SYS_SYSPROTO_H_
1634 struct cpuset_getid_args {
1642 sys_cpuset_getid(struct thread *td, struct cpuset_getid_args *uap)
1645 return (kern_cpuset_getid(td, uap->level, uap->which, uap->id,
1650 kern_cpuset_getid(struct thread *td, cpulevel_t level, cpuwhich_t which,
1651 id_t id, cpusetid_t *setid)
1653 struct cpuset *nset;
1660 if (level == CPU_LEVEL_WHICH && which != CPU_WHICH_CPUSET)
1662 error = cpuset_which(which, id, &p, &ttd, &set);
1669 set = cpuset_refbase(ttd->td_cpuset);
1673 case CPU_WHICH_CPUSET:
1674 case CPU_WHICH_JAIL:
1677 case CPU_WHICH_DOMAIN:
1681 case CPU_LEVEL_ROOT:
1682 nset = cpuset_refroot(set);
1686 case CPU_LEVEL_CPUSET:
1688 case CPU_LEVEL_WHICH:
1694 error = copyout(&tmpid, setid, sizeof(tmpid));
1699 #ifndef _SYS_SYSPROTO_H_
1700 struct cpuset_getaffinity_args {
1709 sys_cpuset_getaffinity(struct thread *td, struct cpuset_getaffinity_args *uap)
1712 return (kern_cpuset_getaffinity(td, uap->level, uap->which,
1713 uap->id, uap->cpusetsize, uap->mask));
1717 kern_cpuset_getaffinity(struct thread *td, cpulevel_t level, cpuwhich_t which,
1718 id_t id, size_t cpusetsize, cpuset_t *maskp)
1721 struct cpuset *nset;
1728 if (cpusetsize < sizeof(cpuset_t) || cpusetsize > CPU_MAXSIZE / NBBY)
1730 /* In Capability mode, you can only get your own CPU set. */
1731 if (IN_CAPABILITY_MODE(td)) {
1732 if (level != CPU_LEVEL_WHICH)
1734 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
1740 mask = malloc(size, M_TEMP, M_WAITOK | M_ZERO);
1741 error = cpuset_which(which, id, &p, &ttd, &set);
1745 case CPU_LEVEL_ROOT:
1746 case CPU_LEVEL_CPUSET:
1751 set = cpuset_ref(ttd->td_cpuset);
1754 case CPU_WHICH_CPUSET:
1755 case CPU_WHICH_JAIL:
1758 case CPU_WHICH_INTRHANDLER:
1759 case CPU_WHICH_ITHREAD:
1760 case CPU_WHICH_DOMAIN:
1764 if (level == CPU_LEVEL_ROOT)
1765 nset = cpuset_refroot(set);
1767 nset = cpuset_refbase(set);
1768 CPU_COPY(&nset->cs_mask, mask);
1771 case CPU_LEVEL_WHICH:
1775 CPU_COPY(&ttd->td_cpuset->cs_mask, mask);
1779 FOREACH_THREAD_IN_PROC(p, ttd) {
1781 CPU_OR(mask, &ttd->td_cpuset->cs_mask);
1785 case CPU_WHICH_CPUSET:
1786 case CPU_WHICH_JAIL:
1787 CPU_COPY(&set->cs_mask, mask);
1790 case CPU_WHICH_INTRHANDLER:
1791 case CPU_WHICH_ITHREAD:
1792 error = intr_getaffinity(id, which, mask);
1794 case CPU_WHICH_DOMAIN:
1795 if (id < 0 || id >= MAXMEMDOM)
1798 CPU_COPY(&cpuset_domain[id], mask);
1811 error = copyout(mask, maskp, size);
1817 #ifndef _SYS_SYSPROTO_H_
1818 struct cpuset_setaffinity_args {
1823 const cpuset_t *mask;
1827 sys_cpuset_setaffinity(struct thread *td, struct cpuset_setaffinity_args *uap)
1830 return (kern_cpuset_setaffinity(td, uap->level, uap->which,
1831 uap->id, uap->cpusetsize, uap->mask));
1835 kern_cpuset_setaffinity(struct thread *td, cpulevel_t level, cpuwhich_t which,
1836 id_t id, size_t cpusetsize, const cpuset_t *maskp)
1838 struct cpuset *nset;
1845 if (cpusetsize < sizeof(cpuset_t) || cpusetsize > CPU_MAXSIZE / NBBY)
1847 /* In Capability mode, you can only set your own CPU set. */
1848 if (IN_CAPABILITY_MODE(td)) {
1849 if (level != CPU_LEVEL_WHICH)
1851 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
1856 mask = malloc(cpusetsize, M_TEMP, M_WAITOK | M_ZERO);
1857 error = copyin(maskp, mask, cpusetsize);
1861 * Verify that no high bits are set.
1863 if (cpusetsize > sizeof(cpuset_t)) {
1867 end = cp = (char *)&mask->__bits;
1869 cp += sizeof(cpuset_t);
1878 case CPU_LEVEL_ROOT:
1879 case CPU_LEVEL_CPUSET:
1880 error = cpuset_which(which, id, &p, &ttd, &set);
1887 set = cpuset_ref(ttd->td_cpuset);
1891 case CPU_WHICH_CPUSET:
1892 case CPU_WHICH_JAIL:
1895 case CPU_WHICH_INTRHANDLER:
1896 case CPU_WHICH_ITHREAD:
1897 case CPU_WHICH_DOMAIN:
1901 if (level == CPU_LEVEL_ROOT)
1902 nset = cpuset_refroot(set);
1904 nset = cpuset_refbase(set);
1905 error = cpuset_modify(nset, mask);
1909 case CPU_LEVEL_WHICH:
1912 error = cpuset_setthread(id, mask);
1915 error = cpuset_setproc(id, NULL, mask, NULL);
1917 case CPU_WHICH_CPUSET:
1918 case CPU_WHICH_JAIL:
1919 error = cpuset_which(which, id, &p, &ttd, &set);
1921 error = cpuset_modify(set, mask);
1926 case CPU_WHICH_INTRHANDLER:
1927 case CPU_WHICH_ITHREAD:
1928 error = intr_setaffinity(id, which, mask);
1944 #ifndef _SYS_SYSPROTO_H_
1945 struct cpuset_getdomain_args {
1949 size_t domainsetsize;
1955 sys_cpuset_getdomain(struct thread *td, struct cpuset_getdomain_args *uap)
1958 return (kern_cpuset_getdomain(td, uap->level, uap->which,
1959 uap->id, uap->domainsetsize, uap->mask, uap->policy));
1963 kern_cpuset_getdomain(struct thread *td, cpulevel_t level, cpuwhich_t which,
1964 id_t id, size_t domainsetsize, domainset_t *maskp, int *policyp)
1966 struct domainset outset;
1968 struct cpuset *nset;
1970 struct domainset *dset;
1975 if (domainsetsize < sizeof(domainset_t) ||
1976 domainsetsize > DOMAINSET_MAXSIZE / NBBY)
1978 /* In Capability mode, you can only get your own domain set. */
1979 if (IN_CAPABILITY_MODE(td)) {
1980 if (level != CPU_LEVEL_WHICH)
1982 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
1987 mask = malloc(domainsetsize, M_TEMP, M_WAITOK | M_ZERO);
1988 bzero(&outset, sizeof(outset));
1989 error = cpuset_which(which, id, &p, &ttd, &set);
1993 case CPU_LEVEL_ROOT:
1994 case CPU_LEVEL_CPUSET:
1999 set = cpuset_ref(ttd->td_cpuset);
2002 case CPU_WHICH_CPUSET:
2003 case CPU_WHICH_JAIL:
2006 case CPU_WHICH_INTRHANDLER:
2007 case CPU_WHICH_ITHREAD:
2008 case CPU_WHICH_DOMAIN:
2012 if (level == CPU_LEVEL_ROOT)
2013 nset = cpuset_refroot(set);
2015 nset = cpuset_refbase(set);
2016 domainset_copy(nset->cs_domain, &outset);
2019 case CPU_LEVEL_WHICH:
2023 domainset_copy(ttd->td_cpuset->cs_domain, &outset);
2027 FOREACH_THREAD_IN_PROC(p, ttd) {
2029 dset = ttd->td_cpuset->cs_domain;
2030 /* Show all domains in the proc. */
2031 DOMAINSET_OR(&outset.ds_mask, &dset->ds_mask);
2032 /* Last policy wins. */
2033 outset.ds_policy = dset->ds_policy;
2034 outset.ds_prefer = dset->ds_prefer;
2038 case CPU_WHICH_CPUSET:
2039 case CPU_WHICH_JAIL:
2040 domainset_copy(set->cs_domain, &outset);
2043 case CPU_WHICH_INTRHANDLER:
2044 case CPU_WHICH_ITHREAD:
2045 case CPU_WHICH_DOMAIN:
2059 * Translate prefer into a set containing only the preferred domain,
2060 * not the entire fallback set.
2062 if (outset.ds_policy == DOMAINSET_POLICY_PREFER) {
2063 DOMAINSET_ZERO(&outset.ds_mask);
2064 DOMAINSET_SET(outset.ds_prefer, &outset.ds_mask);
2066 DOMAINSET_COPY(&outset.ds_mask, mask);
2068 error = copyout(mask, maskp, domainsetsize);
2070 if (suword32(policyp, outset.ds_policy) != 0)
2077 #ifndef _SYS_SYSPROTO_H_
2078 struct cpuset_setdomain_args {
2082 size_t domainsetsize;
2088 sys_cpuset_setdomain(struct thread *td, struct cpuset_setdomain_args *uap)
2091 return (kern_cpuset_setdomain(td, uap->level, uap->which,
2092 uap->id, uap->domainsetsize, uap->mask, uap->policy));
2096 kern_cpuset_setdomain(struct thread *td, cpulevel_t level, cpuwhich_t which,
2097 id_t id, size_t domainsetsize, const domainset_t *maskp, int policy)
2099 struct cpuset *nset;
2103 struct domainset domain;
2107 if (domainsetsize < sizeof(domainset_t) ||
2108 domainsetsize > DOMAINSET_MAXSIZE / NBBY)
2110 if (policy <= DOMAINSET_POLICY_INVALID ||
2111 policy > DOMAINSET_POLICY_MAX)
2113 /* In Capability mode, you can only set your own CPU set. */
2114 if (IN_CAPABILITY_MODE(td)) {
2115 if (level != CPU_LEVEL_WHICH)
2117 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
2122 memset(&domain, 0, sizeof(domain));
2123 mask = malloc(domainsetsize, M_TEMP, M_WAITOK | M_ZERO);
2124 error = copyin(maskp, mask, domainsetsize);
2128 * Verify that no high bits are set.
2130 if (domainsetsize > sizeof(domainset_t)) {
2134 end = cp = (char *)&mask->__bits;
2135 end += domainsetsize;
2136 cp += sizeof(domainset_t);
2144 DOMAINSET_COPY(mask, &domain.ds_mask);
2145 domain.ds_policy = policy;
2147 /* Translate preferred policy into a mask and fallback. */
2148 if (policy == DOMAINSET_POLICY_PREFER) {
2149 /* Only support a single preferred domain. */
2150 if (DOMAINSET_COUNT(&domain.ds_mask) != 1) {
2154 domain.ds_prefer = DOMAINSET_FFS(&domain.ds_mask) - 1;
2155 /* This will be constrained by domainset_shadow(). */
2156 DOMAINSET_FILL(&domain.ds_mask);
2160 * When given an impossible policy, fall back to interleaving
2161 * across all domains
2163 if (domainset_empty_vm(&domain))
2164 domainset_copy(&domainset2, &domain);
2167 case CPU_LEVEL_ROOT:
2168 case CPU_LEVEL_CPUSET:
2169 error = cpuset_which(which, id, &p, &ttd, &set);
2176 set = cpuset_ref(ttd->td_cpuset);
2180 case CPU_WHICH_CPUSET:
2181 case CPU_WHICH_JAIL:
2184 case CPU_WHICH_INTRHANDLER:
2185 case CPU_WHICH_ITHREAD:
2186 case CPU_WHICH_DOMAIN:
2190 if (level == CPU_LEVEL_ROOT)
2191 nset = cpuset_refroot(set);
2193 nset = cpuset_refbase(set);
2194 error = cpuset_modify_domain(nset, &domain);
2198 case CPU_LEVEL_WHICH:
2201 error = _cpuset_setthread(id, NULL, &domain);
2204 error = cpuset_setproc(id, NULL, NULL, &domain);
2206 case CPU_WHICH_CPUSET:
2207 case CPU_WHICH_JAIL:
2208 error = cpuset_which(which, id, &p, &ttd, &set);
2210 error = cpuset_modify_domain(set, &domain);
2215 case CPU_WHICH_INTRHANDLER:
2216 case CPU_WHICH_ITHREAD:
2234 ddb_display_bitset(const struct bitset *set, int size)
2238 for (once = 0, bit = 0; bit < size; bit++) {
2239 if (CPU_ISSET(bit, set)) {
2241 db_printf("%d", bit);
2244 db_printf(",%d", bit);
2248 db_printf("<none>");
2252 ddb_display_cpuset(const cpuset_t *set)
2254 ddb_display_bitset((const struct bitset *)set, CPU_SETSIZE);
2258 ddb_display_domainset(const domainset_t *set)
2260 ddb_display_bitset((const struct bitset *)set, DOMAINSET_SETSIZE);
2263 DB_SHOW_COMMAND(cpusets, db_show_cpusets)
2267 LIST_FOREACH(set, &cpuset_ids, cs_link) {
2268 db_printf("set=%p id=%-6u ref=%-6d flags=0x%04x parent id=%d\n",
2269 set, set->cs_id, set->cs_ref, set->cs_flags,
2270 (set->cs_parent != NULL) ? set->cs_parent->cs_id : 0);
2271 db_printf(" cpu mask=");
2272 ddb_display_cpuset(&set->cs_mask);
2274 db_printf(" domain policy %d prefer %d mask=",
2275 set->cs_domain->ds_policy, set->cs_domain->ds_prefer);
2276 ddb_display_domainset(&set->cs_domain->ds_mask);
2283 DB_SHOW_COMMAND(domainsets, db_show_domainsets)
2285 struct domainset *set;
2287 LIST_FOREACH(set, &cpuset_domains, ds_link) {
2288 db_printf("set=%p policy %d prefer %d cnt %d\n",
2289 set, set->ds_policy, set->ds_prefer, set->ds_cnt);
2290 db_printf(" mask =");
2291 ddb_display_domainset(&set->ds_mask);