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)
249 LIST_REMOVE(set, cs_link);
250 cpuset_rel(set->cs_parent);
251 uma_zfree(cpuset_zone, set);
255 * Find a set based on an id. Returns it with a ref.
257 static struct cpuset *
258 cpuset_lookup(cpusetid_t setid, struct thread *td)
262 if (setid == CPUSET_INVALID)
264 mtx_lock_spin(&cpuset_lock);
265 LIST_FOREACH(set, &cpuset_ids, cs_link)
266 if (set->cs_id == setid)
270 mtx_unlock_spin(&cpuset_lock);
272 KASSERT(td != NULL, ("[%s:%d] td is NULL", __func__, __LINE__));
273 if (set != NULL && jailed(td->td_ucred)) {
274 struct cpuset *jset, *tset;
276 jset = td->td_ucred->cr_prison->pr_cpuset;
277 for (tset = set; tset != NULL; tset = tset->cs_parent)
290 * Create a set in the space provided in 'set' with the provided parameters.
291 * The set is returned with a single ref. May return EDEADLK if the set
292 * will have no valid cpu based on restrictions from the parent.
295 _cpuset_create(struct cpuset *set, struct cpuset *parent,
296 const cpuset_t *mask, struct domainset *domain, cpusetid_t id)
300 domain = parent->cs_domain;
302 mask = &parent->cs_mask;
303 if (!CPU_OVERLAP(&parent->cs_mask, mask))
305 /* The domain must be prepared ahead of time. */
306 if (!domainset_valid(parent->cs_domain, domain))
308 CPU_COPY(mask, &set->cs_mask);
309 LIST_INIT(&set->cs_children);
310 refcount_init(&set->cs_ref, 1);
312 mtx_lock_spin(&cpuset_lock);
313 set->cs_domain = domain;
314 CPU_AND(&set->cs_mask, &parent->cs_mask);
316 set->cs_parent = cpuset_ref(parent);
317 LIST_INSERT_HEAD(&parent->cs_children, set, cs_siblings);
318 if (set->cs_id != CPUSET_INVALID)
319 LIST_INSERT_HEAD(&cpuset_ids, set, cs_link);
320 mtx_unlock_spin(&cpuset_lock);
326 * Create a new non-anonymous set with the requested parent and mask. May
327 * return failures if the mask is invalid or a new number can not be
331 cpuset_create(struct cpuset **setp, struct cpuset *parent, const cpuset_t *mask)
337 id = alloc_unr(cpuset_unr);
340 *setp = set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
341 error = _cpuset_create(set, parent, mask, NULL, id);
344 free_unr(cpuset_unr, id);
345 uma_zfree(cpuset_zone, set);
351 cpuset_freelist_add(struct setlist *list, int count)
356 for (i = 0; i < count; i++) {
357 set = uma_zalloc(cpuset_zone, M_ZERO | M_WAITOK);
358 LIST_INSERT_HEAD(list, set, cs_link);
363 cpuset_freelist_init(struct setlist *list, int count)
367 cpuset_freelist_add(list, count);
371 cpuset_freelist_free(struct setlist *list)
375 while ((set = LIST_FIRST(list)) != NULL) {
376 LIST_REMOVE(set, cs_link);
377 uma_zfree(cpuset_zone, set);
382 domainset_freelist_add(struct domainlist *list, int count)
384 struct domainset *set;
387 for (i = 0; i < count; i++) {
388 set = uma_zalloc(domainset_zone, M_ZERO | M_WAITOK);
389 LIST_INSERT_HEAD(list, set, ds_link);
394 domainset_freelist_init(struct domainlist *list, int count)
398 domainset_freelist_add(list, count);
402 domainset_freelist_free(struct domainlist *list)
404 struct domainset *set;
406 while ((set = LIST_FIRST(list)) != NULL) {
407 LIST_REMOVE(set, ds_link);
408 uma_zfree(domainset_zone, set);
412 /* Copy a domainset preserving mask and policy. */
414 domainset_copy(const struct domainset *from, struct domainset *to)
417 DOMAINSET_COPY(&from->ds_mask, &to->ds_mask);
418 to->ds_policy = from->ds_policy;
419 to->ds_prefer = from->ds_prefer;
422 /* Return 1 if mask and policy are equal, otherwise 0. */
424 domainset_equal(const struct domainset *one, const struct domainset *two)
427 return (DOMAINSET_CMP(&one->ds_mask, &two->ds_mask) == 0 &&
428 one->ds_policy == two->ds_policy &&
429 one->ds_prefer == two->ds_prefer);
432 /* Return 1 if child is a valid subset of parent. */
434 domainset_valid(const struct domainset *parent, const struct domainset *child)
436 if (child->ds_policy != DOMAINSET_POLICY_PREFER)
437 return (DOMAINSET_SUBSET(&parent->ds_mask, &child->ds_mask));
438 return (DOMAINSET_ISSET(child->ds_prefer, &parent->ds_mask));
442 domainset_restrict(const struct domainset *parent,
443 const struct domainset *child)
445 if (child->ds_policy != DOMAINSET_POLICY_PREFER)
446 return (DOMAINSET_OVERLAP(&parent->ds_mask, &child->ds_mask));
447 return (DOMAINSET_ISSET(child->ds_prefer, &parent->ds_mask));
451 * Lookup or create a domainset. The key is provided in ds_mask and
452 * ds_policy. If the domainset does not yet exist the storage in
453 * 'domain' is used to insert. Otherwise this storage is freed to the
454 * domainset_zone and the existing domainset is returned.
456 static struct domainset *
457 _domainset_create(struct domainset *domain, struct domainlist *freelist)
459 struct domainset *ndomain;
462 KASSERT(domain->ds_cnt <= vm_ndomains,
463 ("invalid domain count in domainset %p", domain));
464 KASSERT(domain->ds_policy != DOMAINSET_POLICY_PREFER ||
465 domain->ds_prefer < vm_ndomains,
466 ("invalid preferred domain in domains %p", domain));
468 mtx_lock_spin(&cpuset_lock);
469 LIST_FOREACH(ndomain, &cpuset_domains, ds_link)
470 if (domainset_equal(ndomain, domain))
473 * If the domain does not yet exist we insert it and initialize
474 * various iteration helpers which are not part of the key.
476 if (ndomain == NULL) {
477 LIST_INSERT_HEAD(&cpuset_domains, domain, ds_link);
478 domain->ds_cnt = DOMAINSET_COUNT(&domain->ds_mask);
479 max = DOMAINSET_FLS(&domain->ds_mask) + 1;
480 for (i = 0, j = 0; i < max; i++)
481 if (DOMAINSET_ISSET(i, &domain->ds_mask))
482 domain->ds_order[j++] = i;
484 mtx_unlock_spin(&cpuset_lock);
487 if (freelist != NULL)
488 LIST_INSERT_HEAD(freelist, domain, ds_link);
490 uma_zfree(domainset_zone, domain);
496 * Are any of the domains in the mask empty? If so, silently
497 * remove them and update the domainset accordingly. If only empty
498 * domains are present, we must return failure.
501 domainset_empty_vm(struct domainset *domain)
505 max = DOMAINSET_FLS(&domain->ds_mask) + 1;
506 for (i = 0; i < max; i++)
507 if (DOMAINSET_ISSET(i, &domain->ds_mask) && VM_DOMAIN_EMPTY(i))
508 DOMAINSET_CLR(i, &domain->ds_mask);
509 domain->ds_cnt = DOMAINSET_COUNT(&domain->ds_mask);
510 max = DOMAINSET_FLS(&domain->ds_mask) + 1;
511 for (i = j = 0; i < max; i++) {
512 if (DOMAINSET_ISSET(i, &domain->ds_mask))
513 domain->ds_order[j++] = i;
514 else if (domain->ds_policy == DOMAINSET_POLICY_PREFER &&
515 domain->ds_prefer == i && domain->ds_cnt > 1) {
516 domain->ds_policy = DOMAINSET_POLICY_ROUNDROBIN;
517 domain->ds_prefer = -1;
521 return (DOMAINSET_EMPTY(&domain->ds_mask));
525 * Create or lookup a domainset based on the key held in 'domain'.
528 domainset_create(const struct domainset *domain)
530 struct domainset *ndomain;
533 * Validate the policy. It must specify a useable policy number with
534 * only valid domains. Preferred must include the preferred domain
537 if (domain->ds_policy <= DOMAINSET_POLICY_INVALID ||
538 domain->ds_policy > DOMAINSET_POLICY_MAX)
540 if (domain->ds_policy == DOMAINSET_POLICY_PREFER &&
541 !DOMAINSET_ISSET(domain->ds_prefer, &domain->ds_mask))
543 if (!DOMAINSET_SUBSET(&domainset0.ds_mask, &domain->ds_mask))
545 ndomain = uma_zalloc(domainset_zone, M_WAITOK | M_ZERO);
546 domainset_copy(domain, ndomain);
547 return _domainset_create(ndomain, NULL);
551 * Update thread domainset pointers.
554 domainset_notify(void)
559 sx_slock(&allproc_lock);
560 FOREACH_PROC_IN_SYSTEM(p) {
562 if (p->p_state == PRS_NEW) {
566 FOREACH_THREAD_IN_PROC(p, td) {
568 td->td_domain.dr_policy = td->td_cpuset->cs_domain;
573 sx_sunlock(&allproc_lock);
574 kernel_object->domain.dr_policy = cpuset_kernel->cs_domain;
578 * Create a new set that is a subset of a parent.
580 static struct domainset *
581 domainset_shadow(const struct domainset *pdomain,
582 const struct domainset *domain, struct domainlist *freelist)
584 struct domainset *ndomain;
586 ndomain = LIST_FIRST(freelist);
587 LIST_REMOVE(ndomain, ds_link);
590 * Initialize the key from the request.
592 domainset_copy(domain, ndomain);
595 * Restrict the key by the parent.
597 DOMAINSET_AND(&ndomain->ds_mask, &pdomain->ds_mask);
599 return _domainset_create(ndomain, freelist);
603 * Recursively check for errors that would occur from applying mask to
604 * the tree of sets starting at 'set'. Checks for sets that would become
605 * empty as well as RDONLY flags.
608 cpuset_testupdate(struct cpuset *set, cpuset_t *mask, int check_mask)
614 mtx_assert(&cpuset_lock, MA_OWNED);
615 if (set->cs_flags & CPU_SET_RDONLY)
618 if (!CPU_OVERLAP(&set->cs_mask, mask))
620 CPU_COPY(&set->cs_mask, &newmask);
621 CPU_AND(&newmask, mask);
623 CPU_COPY(mask, &newmask);
625 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
626 if ((error = cpuset_testupdate(nset, &newmask, 1)) != 0)
632 * Applies the mask 'mask' without checking for empty sets or permissions.
635 cpuset_update(struct cpuset *set, cpuset_t *mask)
639 mtx_assert(&cpuset_lock, MA_OWNED);
640 CPU_AND(&set->cs_mask, mask);
641 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
642 cpuset_update(nset, &set->cs_mask);
648 * Modify the set 'set' to use a copy of the mask provided. Apply this new
649 * mask to restrict all children in the tree. Checks for validity before
650 * applying the changes.
653 cpuset_modify(struct cpuset *set, cpuset_t *mask)
658 error = priv_check(curthread, PRIV_SCHED_CPUSET);
662 * In case we are called from within the jail
663 * we do not allow modifying the dedicated root
664 * cpuset of the jail but may still allow to
667 if (jailed(curthread->td_ucred) &&
668 set->cs_flags & CPU_SET_ROOT)
671 * Verify that we have access to this set of
674 root = cpuset_getroot(set);
675 mtx_lock_spin(&cpuset_lock);
676 if (root && !CPU_SUBSET(&root->cs_mask, mask)) {
680 error = cpuset_testupdate(set, mask, 0);
683 CPU_COPY(mask, &set->cs_mask);
684 cpuset_update(set, mask);
686 mtx_unlock_spin(&cpuset_lock);
692 * Recursively check for errors that would occur from applying mask to
693 * the tree of sets starting at 'set'. Checks for sets that would become
694 * empty as well as RDONLY flags.
697 cpuset_testupdate_domain(struct cpuset *set, struct domainset *dset,
698 struct domainset *orig, int *count, int check_mask)
701 struct domainset *domain;
702 struct domainset newset;
705 mtx_assert(&cpuset_lock, MA_OWNED);
706 if (set->cs_flags & CPU_SET_RDONLY)
708 domain = set->cs_domain;
709 domainset_copy(domain, &newset);
710 if (!domainset_equal(domain, orig)) {
711 if (!domainset_restrict(domain, dset))
713 DOMAINSET_AND(&newset.ds_mask, &dset->ds_mask);
714 /* Count the number of domains that are changing. */
718 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
719 if ((error = cpuset_testupdate_domain(nset, &newset, domain,
726 * Applies the mask 'mask' without checking for empty sets or permissions.
729 cpuset_update_domain(struct cpuset *set, struct domainset *domain,
730 struct domainset *orig, struct domainlist *domains)
734 mtx_assert(&cpuset_lock, MA_OWNED);
736 * If this domainset has changed from the parent we must calculate
737 * a new set. Otherwise it simply inherits from the parent. When
738 * we inherit from the parent we get a new mask and policy. If the
739 * set is modified from the parent we keep the policy and only
742 if (set->cs_domain != orig) {
743 orig = set->cs_domain;
744 set->cs_domain = domainset_shadow(domain, orig, domains);
746 set->cs_domain = domain;
747 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
748 cpuset_update_domain(nset, set->cs_domain, orig, domains);
754 * Modify the set 'set' to use a copy the domainset provided. Apply this new
755 * mask to restrict all children in the tree. Checks for validity before
756 * applying the changes.
759 cpuset_modify_domain(struct cpuset *set, struct domainset *domain)
761 struct domainlist domains;
762 struct domainset temp;
763 struct domainset *dset;
765 int ndomains, needed;
768 error = priv_check(curthread, PRIV_SCHED_CPUSET);
772 * In case we are called from within the jail
773 * we do not allow modifying the dedicated root
774 * cpuset of the jail but may still allow to
777 if (jailed(curthread->td_ucred) &&
778 set->cs_flags & CPU_SET_ROOT)
780 domainset_freelist_init(&domains, 0);
781 domain = domainset_create(domain);
782 ndomains = needed = 0;
784 if (ndomains < needed) {
785 domainset_freelist_add(&domains, needed - ndomains);
788 root = cpuset_getroot(set);
789 mtx_lock_spin(&cpuset_lock);
790 dset = root->cs_domain;
792 * Verify that we have access to this set of domains.
794 if (root && !domainset_valid(dset, domain)) {
799 * If applying prefer we keep the current set as the fallback.
801 if (domain->ds_policy == DOMAINSET_POLICY_PREFER)
802 DOMAINSET_COPY(&set->cs_domain->ds_mask,
805 * Determine whether we can apply this set of domains and
806 * how many new domain structures it will require.
808 domainset_copy(domain, &temp);
810 error = cpuset_testupdate_domain(set, &temp, set->cs_domain,
814 } while (ndomains < needed);
815 dset = set->cs_domain;
816 cpuset_update_domain(set, domain, dset, &domains);
818 mtx_unlock_spin(&cpuset_lock);
819 domainset_freelist_free(&domains);
827 * Resolve the 'which' parameter of several cpuset apis.
829 * For WHICH_PID and WHICH_TID return a locked proc and valid proc/tid. Also
830 * checks for permission via p_cansched().
832 * For WHICH_SET returns a valid set with a new reference.
834 * -1 may be supplied for any argument to mean the current proc/thread or
835 * the base set of the current thread. May fail with ESRCH/EPERM.
838 cpuset_which(cpuwhich_t which, id_t id, struct proc **pp, struct thread **tdp,
839 struct cpuset **setp)
856 if ((p = pfind(id)) == NULL)
871 case CPU_WHICH_CPUSET:
873 thread_lock(curthread);
874 set = cpuset_refbase(curthread->td_cpuset);
875 thread_unlock(curthread);
877 set = cpuset_lookup(id, curthread);
885 /* Find `set' for prison with given id. */
888 sx_slock(&allprison_lock);
889 pr = prison_find_child(curthread->td_ucred->cr_prison, id);
890 sx_sunlock(&allprison_lock);
893 cpuset_ref(pr->pr_cpuset);
894 *setp = pr->pr_cpuset;
895 mtx_unlock(&pr->pr_mtx);
899 case CPU_WHICH_DOMAIN:
904 error = p_cansched(curthread, p);
910 td = FIRST_THREAD_IN_PROC(p);
917 cpuset_testshadow(struct cpuset *set, const cpuset_t *mask,
918 const struct domainset *domain)
920 struct cpuset *parent;
921 struct domainset *dset;
923 parent = cpuset_getbase(set);
925 * If we are restricting a cpu mask it must be a subset of the
926 * parent or invalid CPUs have been specified.
928 if (mask != NULL && !CPU_SUBSET(&parent->cs_mask, mask))
932 * If we are restricting a domain mask it must be a subset of the
933 * parent or invalid domains have been specified.
935 dset = parent->cs_domain;
936 if (domain != NULL && !domainset_valid(dset, domain))
943 * Create an anonymous set with the provided mask in the space provided by
944 * 'nset'. If the passed in set is anonymous we use its parent otherwise
945 * the new set is a child of 'set'.
948 cpuset_shadow(struct cpuset *set, struct cpuset **nsetp,
949 const cpuset_t *mask, const struct domainset *domain,
950 struct setlist *cpusets, struct domainlist *domains)
952 struct cpuset *parent;
954 struct domainset *dset;
958 error = cpuset_testshadow(set, mask, domain);
962 parent = cpuset_getbase(set);
963 dset = parent->cs_domain;
965 mask = &set->cs_mask;
967 d = domainset_shadow(dset, domain, domains);
970 nset = LIST_FIRST(cpusets);
971 error = _cpuset_create(nset, parent, mask, d, CPUSET_INVALID);
973 LIST_REMOVE(nset, cs_link);
979 static struct cpuset *
980 cpuset_update_thread(struct thread *td, struct cpuset *nset)
982 struct cpuset *tdset;
984 tdset = td->td_cpuset;
985 td->td_cpuset = nset;
986 td->td_domain.dr_policy = nset->cs_domain;
993 cpuset_setproc_test_maskthread(struct cpuset *tdset, cpuset_t *mask,
994 struct domainset *domain)
996 struct cpuset *parent;
998 parent = cpuset_getbase(tdset);
1000 mask = &tdset->cs_mask;
1002 domain = tdset->cs_domain;
1003 return cpuset_testshadow(parent, mask, domain);
1007 cpuset_setproc_maskthread(struct cpuset *tdset, cpuset_t *mask,
1008 struct domainset *domain, struct cpuset **nsetp,
1009 struct setlist *freelist, struct domainlist *domainlist)
1011 struct cpuset *parent;
1013 parent = cpuset_getbase(tdset);
1015 mask = &tdset->cs_mask;
1017 domain = tdset->cs_domain;
1018 return cpuset_shadow(parent, nsetp, mask, domain, freelist,
1023 cpuset_setproc_setthread_mask(struct cpuset *tdset, struct cpuset *set,
1024 cpuset_t *mask, struct domainset *domain)
1026 struct cpuset *parent;
1028 parent = cpuset_getbase(tdset);
1031 * If the thread restricted its mask then apply that same
1032 * restriction to the new set, otherwise take it wholesale.
1034 if (CPU_CMP(&tdset->cs_mask, &parent->cs_mask) != 0) {
1035 CPU_COPY(&tdset->cs_mask, mask);
1036 CPU_AND(mask, &set->cs_mask);
1038 CPU_COPY(&set->cs_mask, mask);
1041 * If the thread restricted the domain then we apply the
1042 * restriction to the new set but retain the policy.
1044 if (tdset->cs_domain != parent->cs_domain) {
1045 domainset_copy(tdset->cs_domain, domain);
1046 DOMAINSET_AND(&domain->ds_mask, &set->cs_domain->ds_mask);
1048 domainset_copy(set->cs_domain, domain);
1050 if (CPU_EMPTY(mask) || DOMAINSET_EMPTY(&domain->ds_mask))
1057 cpuset_setproc_test_setthread(struct cpuset *tdset, struct cpuset *set)
1059 struct domainset domain;
1062 if (tdset->cs_id != CPUSET_INVALID)
1064 return cpuset_setproc_setthread_mask(tdset, set, &mask, &domain);
1068 cpuset_setproc_setthread(struct cpuset *tdset, struct cpuset *set,
1069 struct cpuset **nsetp, struct setlist *freelist,
1070 struct domainlist *domainlist)
1072 struct domainset domain;
1077 * If we're replacing on a thread that has not constrained the
1078 * original set we can simply accept the new set.
1080 if (tdset->cs_id != CPUSET_INVALID) {
1081 *nsetp = cpuset_ref(set);
1084 error = cpuset_setproc_setthread_mask(tdset, set, &mask, &domain);
1088 return cpuset_shadow(tdset, nsetp, &mask, &domain, freelist,
1093 * Handle three cases for updating an entire process.
1095 * 1) Set is non-null. This reparents all anonymous sets to the provided
1096 * set and replaces all non-anonymous td_cpusets with the provided set.
1097 * 2) Mask is non-null. This replaces or creates anonymous sets for every
1098 * thread with the existing base as a parent.
1099 * 3) domain is non-null. This creates anonymous sets for every thread
1100 * and replaces the domain set.
1102 * This is overly complicated because we can't allocate while holding a
1103 * spinlock and spinlocks must be held while changing and examining thread
1107 cpuset_setproc(pid_t pid, struct cpuset *set, cpuset_t *mask,
1108 struct domainset *domain)
1110 struct setlist freelist;
1111 struct setlist droplist;
1112 struct domainlist domainlist;
1113 struct cpuset *nset;
1121 * The algorithm requires two passes due to locking considerations.
1123 * 1) Lookup the process and acquire the locks in the required order.
1124 * 2) If enough cpusets have not been allocated release the locks and
1125 * allocate them. Loop.
1127 cpuset_freelist_init(&freelist, 1);
1128 domainset_freelist_init(&domainlist, 1);
1130 LIST_INIT(&droplist);
1133 error = cpuset_which(CPU_WHICH_PID, pid, &p, &td, &nset);
1136 if (nfree >= p->p_numthreads)
1138 threads = p->p_numthreads;
1140 if (nfree < threads) {
1141 cpuset_freelist_add(&freelist, threads - nfree);
1142 domainset_freelist_add(&domainlist, threads - nfree);
1146 PROC_LOCK_ASSERT(p, MA_OWNED);
1148 * Now that the appropriate locks are held and we have enough cpusets,
1149 * make sure the operation will succeed before applying changes. The
1150 * proc lock prevents td_cpuset from changing between calls.
1153 FOREACH_THREAD_IN_PROC(p, td) {
1156 error = cpuset_setproc_test_setthread(td->td_cpuset,
1159 error = cpuset_setproc_test_maskthread(td->td_cpuset,
1166 * Replace each thread's cpuset while using deferred release. We
1167 * must do this because the thread lock must be held while operating
1168 * on the thread and this limits the type of operations allowed.
1170 FOREACH_THREAD_IN_PROC(p, td) {
1173 error = cpuset_setproc_setthread(td->td_cpuset, set,
1174 &nset, &freelist, &domainlist);
1176 error = cpuset_setproc_maskthread(td->td_cpuset, mask,
1177 domain, &nset, &freelist, &domainlist);
1182 cpuset_rel_defer(&droplist, cpuset_update_thread(td, nset));
1188 while ((nset = LIST_FIRST(&droplist)) != NULL)
1189 cpuset_rel_complete(nset);
1190 cpuset_freelist_free(&freelist);
1191 domainset_freelist_free(&domainlist);
1196 bitset_strprint(char *buf, size_t bufsiz, const struct bitset *set, int setlen)
1204 for (i = 0; i < __bitset_words(setlen); i++) {
1213 if (bufsiz < sizeof(__STRING(ULONG_MAX)))
1215 bytes = snprintf(p, bufsiz, "%lx", set->__bits[i]);
1223 bitset_strscan(struct bitset *set, int setlen, const char *buf)
1228 BIT_ZERO(setlen, set);
1230 for (i = 0; i < __bitset_words(setlen); i++) {
1235 ret = sscanf(p, "%lx", &set->__bits[i]);
1236 if (ret == 0 || ret == -1)
1238 while (isxdigit(*p))
1245 * Return a string representing a valid layout for a cpuset_t object.
1246 * It expects an incoming buffer at least sized as CPUSETBUFSIZ.
1249 cpusetobj_strprint(char *buf, const cpuset_t *set)
1252 bitset_strprint(buf, CPUSETBUFSIZ, (const struct bitset *)set,
1258 * Build a valid cpuset_t object from a string representation.
1259 * It expects an incoming buffer at least sized as CPUSETBUFSIZ.
1262 cpusetobj_strscan(cpuset_t *set, const char *buf)
1266 if (strlen(buf) > CPUSETBUFSIZ - 1)
1269 p = buf[bitset_strscan((struct bitset *)set, CPU_SETSIZE, buf)];
1277 * Handle a domainset specifier in the sysctl tree. A poiner to a pointer to
1278 * a domainset is in arg1. If the user specifies a valid domainset the
1279 * pointer is updated.
1282 * hex mask word 0,hex mask word 1,...:decimal policy:decimal preferred
1285 sysctl_handle_domainset(SYSCTL_HANDLER_ARGS)
1287 char buf[DOMAINSETBUFSIZ];
1288 struct domainset *dset;
1289 struct domainset key;
1290 int policy, prefer, error;
1293 dset = *(struct domainset **)arg1;
1297 p = buf + bitset_strprint(buf, DOMAINSETBUFSIZ,
1298 (const struct bitset *)&dset->ds_mask, DOMAINSET_SETSIZE);
1299 sprintf(p, ":%d:%d", dset->ds_policy, dset->ds_prefer);
1301 sprintf(buf, "<NULL>");
1302 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
1303 if (error != 0 || req->newptr == NULL)
1307 * Read in and validate the string.
1309 memset(&key, 0, sizeof(key));
1310 p = &buf[bitset_strscan((struct bitset *)&key.ds_mask,
1311 DOMAINSET_SETSIZE, buf)];
1314 if (sscanf(p, ":%d:%d", &policy, &prefer) != 2)
1316 key.ds_policy = policy;
1317 key.ds_prefer = prefer;
1319 /* Domainset_create() validates the policy.*/
1320 dset = domainset_create(&key);
1323 *(struct domainset **)arg1 = dset;
1329 * Apply an anonymous mask or a domain to a single thread.
1332 _cpuset_setthread(lwpid_t id, cpuset_t *mask, struct domainset *domain)
1334 struct setlist cpusets;
1335 struct domainlist domainlist;
1336 struct cpuset *nset;
1342 cpuset_freelist_init(&cpusets, 1);
1343 domainset_freelist_init(&domainlist, domain != NULL);
1344 error = cpuset_which(CPU_WHICH_TID, id, &p, &td, &set);
1349 error = cpuset_shadow(td->td_cpuset, &nset, mask, domain,
1350 &cpusets, &domainlist);
1352 set = cpuset_update_thread(td, nset);
1358 cpuset_freelist_free(&cpusets);
1359 domainset_freelist_free(&domainlist);
1364 * Apply an anonymous mask to a single thread.
1367 cpuset_setthread(lwpid_t id, cpuset_t *mask)
1370 return _cpuset_setthread(id, mask, NULL);
1374 * Apply new cpumask to the ithread.
1377 cpuset_setithread(lwpid_t id, int cpu)
1383 CPU_COPY(cpuset_root, &mask);
1385 CPU_SET(cpu, &mask);
1386 return _cpuset_setthread(id, &mask, NULL);
1390 * Initialize static domainsets after NUMA information is available. This is
1391 * called before memory allocators are initialized.
1394 domainset_init(void)
1396 struct domainset *dset;
1399 dset = &domainset_roundrobin;
1400 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1401 dset->ds_policy = DOMAINSET_POLICY_ROUNDROBIN;
1402 dset->ds_prefer = -1;
1403 _domainset_create(dset, NULL);
1405 for (i = 0; i < vm_ndomains; i++) {
1406 dset = &domainset_fixed[i];
1407 DOMAINSET_ZERO(&dset->ds_mask);
1408 DOMAINSET_SET(i, &dset->ds_mask);
1409 dset->ds_policy = DOMAINSET_POLICY_ROUNDROBIN;
1410 _domainset_create(dset, NULL);
1412 dset = &domainset_prefer[i];
1413 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1414 dset->ds_policy = DOMAINSET_POLICY_PREFER;
1415 dset->ds_prefer = i;
1416 _domainset_create(dset, NULL);
1421 * Create the domainset for cpuset 0, 1 and cpuset 2.
1424 domainset_zero(void)
1426 struct domainset *dset, *tmp;
1428 mtx_init(&cpuset_lock, "cpuset", NULL, MTX_SPIN | MTX_RECURSE);
1431 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1432 dset->ds_policy = DOMAINSET_POLICY_FIRSTTOUCH;
1433 dset->ds_prefer = -1;
1434 curthread->td_domain.dr_policy = _domainset_create(dset, NULL);
1436 domainset_copy(dset, &domainset2);
1437 domainset2.ds_policy = DOMAINSET_POLICY_INTERLEAVE;
1438 kernel_object->domain.dr_policy = _domainset_create(&domainset2, NULL);
1440 /* Remove empty domains from the global policies. */
1441 LIST_FOREACH_SAFE(dset, &cpuset_domains, ds_link, tmp)
1442 if (domainset_empty_vm(dset))
1443 LIST_REMOVE(dset, ds_link);
1447 * Creates system-wide cpusets and the cpuset for thread0 including three
1450 * 0 - The root set which should represent all valid processors in the
1451 * system. It is initially created with a mask of all processors
1452 * because we don't know what processors are valid until cpuset_init()
1453 * runs. This set is immutable.
1454 * 1 - The default set which all processes are a member of until changed.
1455 * This allows an administrator to move all threads off of given cpus to
1456 * dedicate them to high priority tasks or save power etc.
1457 * 2 - The kernel set which allows restriction and policy to be applied only
1458 * to kernel threads and the kernel_object.
1461 cpuset_thread0(void)
1467 cpuset_zone = uma_zcreate("cpuset", sizeof(struct cpuset), NULL, NULL,
1468 NULL, NULL, UMA_ALIGN_CACHE, 0);
1469 domainset_zone = uma_zcreate("domainset", sizeof(struct domainset),
1470 NULL, NULL, NULL, NULL, UMA_ALIGN_CACHE, 0);
1473 * Create the root system set (0) for the whole machine. Doesn't use
1474 * cpuset_create() due to NULL parent.
1476 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1477 CPU_COPY(&all_cpus, &set->cs_mask);
1478 LIST_INIT(&set->cs_children);
1479 LIST_INSERT_HEAD(&cpuset_ids, set, cs_link);
1481 set->cs_flags = CPU_SET_ROOT | CPU_SET_RDONLY;
1482 set->cs_domain = &domainset0;
1484 cpuset_root = &set->cs_mask;
1487 * Now derive a default (1), modifiable set from that to give out.
1489 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1490 error = _cpuset_create(set, cpuset_zero, NULL, NULL, 1);
1491 KASSERT(error == 0, ("Error creating default set: %d\n", error));
1492 cpuset_default = set;
1494 * Create the kernel set (2).
1496 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1497 error = _cpuset_create(set, cpuset_zero, NULL, NULL, 2);
1498 KASSERT(error == 0, ("Error creating kernel set: %d\n", error));
1499 set->cs_domain = &domainset2;
1500 cpuset_kernel = set;
1503 * Initialize the unit allocator. 0 and 1 are allocated above.
1505 cpuset_unr = new_unrhdr(2, INT_MAX, NULL);
1508 * If MD code has not initialized per-domain cpusets, place all
1511 for (i = 0; i < MAXMEMDOM; i++)
1512 if (!CPU_EMPTY(&cpuset_domain[i]))
1514 CPU_COPY(&all_cpus, &cpuset_domain[0]);
1517 return (cpuset_default);
1521 cpuset_kernthread(struct thread *td)
1526 set = td->td_cpuset;
1527 td->td_cpuset = cpuset_ref(cpuset_kernel);
1533 * Create a cpuset, which would be cpuset_create() but
1534 * mark the new 'set' as root.
1536 * We are not going to reparent the td to it. Use cpuset_setproc_update_set()
1539 * In case of no error, returns the set in *setp locked with a reference.
1542 cpuset_create_root(struct prison *pr, struct cpuset **setp)
1547 KASSERT(pr != NULL, ("[%s:%d] invalid pr", __func__, __LINE__));
1548 KASSERT(setp != NULL, ("[%s:%d] invalid setp", __func__, __LINE__));
1550 error = cpuset_create(setp, pr->pr_cpuset, &pr->pr_cpuset->cs_mask);
1554 KASSERT(*setp != NULL, ("[%s:%d] cpuset_create returned invalid data",
1555 __func__, __LINE__));
1557 /* Mark the set as root. */
1559 set->cs_flags |= CPU_SET_ROOT;
1565 cpuset_setproc_update_set(struct proc *p, struct cpuset *set)
1569 KASSERT(p != NULL, ("[%s:%d] invalid proc", __func__, __LINE__));
1570 KASSERT(set != NULL, ("[%s:%d] invalid set", __func__, __LINE__));
1573 error = cpuset_setproc(p->p_pid, set, NULL, NULL);
1580 #ifndef _SYS_SYSPROTO_H_
1581 struct cpuset_args {
1586 sys_cpuset(struct thread *td, struct cpuset_args *uap)
1588 struct cpuset *root;
1593 root = cpuset_refroot(td->td_cpuset);
1595 error = cpuset_create(&set, root, &root->cs_mask);
1599 error = copyout(&set->cs_id, uap->setid, sizeof(set->cs_id));
1601 error = cpuset_setproc(-1, set, NULL, NULL);
1606 #ifndef _SYS_SYSPROTO_H_
1607 struct cpuset_setid_args {
1614 sys_cpuset_setid(struct thread *td, struct cpuset_setid_args *uap)
1617 return (kern_cpuset_setid(td, uap->which, uap->id, uap->setid));
1621 kern_cpuset_setid(struct thread *td, cpuwhich_t which,
1622 id_t id, cpusetid_t setid)
1628 * Presently we only support per-process sets.
1630 if (which != CPU_WHICH_PID)
1632 set = cpuset_lookup(setid, td);
1635 error = cpuset_setproc(id, set, NULL, NULL);
1640 #ifndef _SYS_SYSPROTO_H_
1641 struct cpuset_getid_args {
1649 sys_cpuset_getid(struct thread *td, struct cpuset_getid_args *uap)
1652 return (kern_cpuset_getid(td, uap->level, uap->which, uap->id,
1657 kern_cpuset_getid(struct thread *td, cpulevel_t level, cpuwhich_t which,
1658 id_t id, cpusetid_t *setid)
1660 struct cpuset *nset;
1667 if (level == CPU_LEVEL_WHICH && which != CPU_WHICH_CPUSET)
1669 error = cpuset_which(which, id, &p, &ttd, &set);
1676 set = cpuset_refbase(ttd->td_cpuset);
1680 case CPU_WHICH_CPUSET:
1681 case CPU_WHICH_JAIL:
1684 case CPU_WHICH_DOMAIN:
1688 case CPU_LEVEL_ROOT:
1689 nset = cpuset_refroot(set);
1693 case CPU_LEVEL_CPUSET:
1695 case CPU_LEVEL_WHICH:
1701 error = copyout(&tmpid, setid, sizeof(tmpid));
1706 #ifndef _SYS_SYSPROTO_H_
1707 struct cpuset_getaffinity_args {
1716 sys_cpuset_getaffinity(struct thread *td, struct cpuset_getaffinity_args *uap)
1719 return (kern_cpuset_getaffinity(td, uap->level, uap->which,
1720 uap->id, uap->cpusetsize, uap->mask));
1724 kern_cpuset_getaffinity(struct thread *td, cpulevel_t level, cpuwhich_t which,
1725 id_t id, size_t cpusetsize, cpuset_t *maskp)
1728 struct cpuset *nset;
1735 if (cpusetsize < sizeof(cpuset_t) || cpusetsize > CPU_MAXSIZE / NBBY)
1737 /* In Capability mode, you can only get your own CPU set. */
1738 if (IN_CAPABILITY_MODE(td)) {
1739 if (level != CPU_LEVEL_WHICH)
1741 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
1747 mask = malloc(size, M_TEMP, M_WAITOK | M_ZERO);
1748 error = cpuset_which(which, id, &p, &ttd, &set);
1752 case CPU_LEVEL_ROOT:
1753 case CPU_LEVEL_CPUSET:
1758 set = cpuset_ref(ttd->td_cpuset);
1761 case CPU_WHICH_CPUSET:
1762 case CPU_WHICH_JAIL:
1765 case CPU_WHICH_INTRHANDLER:
1766 case CPU_WHICH_ITHREAD:
1767 case CPU_WHICH_DOMAIN:
1771 if (level == CPU_LEVEL_ROOT)
1772 nset = cpuset_refroot(set);
1774 nset = cpuset_refbase(set);
1775 CPU_COPY(&nset->cs_mask, mask);
1778 case CPU_LEVEL_WHICH:
1782 CPU_COPY(&ttd->td_cpuset->cs_mask, mask);
1786 FOREACH_THREAD_IN_PROC(p, ttd) {
1788 CPU_OR(mask, &ttd->td_cpuset->cs_mask);
1792 case CPU_WHICH_CPUSET:
1793 case CPU_WHICH_JAIL:
1794 CPU_COPY(&set->cs_mask, mask);
1797 case CPU_WHICH_INTRHANDLER:
1798 case CPU_WHICH_ITHREAD:
1799 error = intr_getaffinity(id, which, mask);
1801 case CPU_WHICH_DOMAIN:
1802 if (id < 0 || id >= MAXMEMDOM)
1805 CPU_COPY(&cpuset_domain[id], mask);
1818 error = copyout(mask, maskp, size);
1824 #ifndef _SYS_SYSPROTO_H_
1825 struct cpuset_setaffinity_args {
1830 const cpuset_t *mask;
1834 sys_cpuset_setaffinity(struct thread *td, struct cpuset_setaffinity_args *uap)
1837 return (kern_cpuset_setaffinity(td, uap->level, uap->which,
1838 uap->id, uap->cpusetsize, uap->mask));
1842 kern_cpuset_setaffinity(struct thread *td, cpulevel_t level, cpuwhich_t which,
1843 id_t id, size_t cpusetsize, const cpuset_t *maskp)
1845 struct cpuset *nset;
1852 if (cpusetsize < sizeof(cpuset_t) || cpusetsize > CPU_MAXSIZE / NBBY)
1854 /* In Capability mode, you can only set your own CPU set. */
1855 if (IN_CAPABILITY_MODE(td)) {
1856 if (level != CPU_LEVEL_WHICH)
1858 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
1863 mask = malloc(cpusetsize, M_TEMP, M_WAITOK | M_ZERO);
1864 error = copyin(maskp, mask, cpusetsize);
1868 * Verify that no high bits are set.
1870 if (cpusetsize > sizeof(cpuset_t)) {
1874 end = cp = (char *)&mask->__bits;
1876 cp += sizeof(cpuset_t);
1885 case CPU_LEVEL_ROOT:
1886 case CPU_LEVEL_CPUSET:
1887 error = cpuset_which(which, id, &p, &ttd, &set);
1894 set = cpuset_ref(ttd->td_cpuset);
1898 case CPU_WHICH_CPUSET:
1899 case CPU_WHICH_JAIL:
1902 case CPU_WHICH_INTRHANDLER:
1903 case CPU_WHICH_ITHREAD:
1904 case CPU_WHICH_DOMAIN:
1908 if (level == CPU_LEVEL_ROOT)
1909 nset = cpuset_refroot(set);
1911 nset = cpuset_refbase(set);
1912 error = cpuset_modify(nset, mask);
1916 case CPU_LEVEL_WHICH:
1919 error = cpuset_setthread(id, mask);
1922 error = cpuset_setproc(id, NULL, mask, NULL);
1924 case CPU_WHICH_CPUSET:
1925 case CPU_WHICH_JAIL:
1926 error = cpuset_which(which, id, &p, &ttd, &set);
1928 error = cpuset_modify(set, mask);
1933 case CPU_WHICH_INTRHANDLER:
1934 case CPU_WHICH_ITHREAD:
1935 error = intr_setaffinity(id, which, mask);
1951 #ifndef _SYS_SYSPROTO_H_
1952 struct cpuset_getdomain_args {
1956 size_t domainsetsize;
1962 sys_cpuset_getdomain(struct thread *td, struct cpuset_getdomain_args *uap)
1965 return (kern_cpuset_getdomain(td, uap->level, uap->which,
1966 uap->id, uap->domainsetsize, uap->mask, uap->policy));
1970 kern_cpuset_getdomain(struct thread *td, cpulevel_t level, cpuwhich_t which,
1971 id_t id, size_t domainsetsize, domainset_t *maskp, int *policyp)
1973 struct domainset outset;
1975 struct cpuset *nset;
1977 struct domainset *dset;
1982 if (domainsetsize < sizeof(domainset_t) ||
1983 domainsetsize > DOMAINSET_MAXSIZE / NBBY)
1985 /* In Capability mode, you can only get your own domain set. */
1986 if (IN_CAPABILITY_MODE(td)) {
1987 if (level != CPU_LEVEL_WHICH)
1989 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
1994 mask = malloc(domainsetsize, M_TEMP, M_WAITOK | M_ZERO);
1995 bzero(&outset, sizeof(outset));
1996 error = cpuset_which(which, id, &p, &ttd, &set);
2000 case CPU_LEVEL_ROOT:
2001 case CPU_LEVEL_CPUSET:
2006 set = cpuset_ref(ttd->td_cpuset);
2009 case CPU_WHICH_CPUSET:
2010 case CPU_WHICH_JAIL:
2013 case CPU_WHICH_INTRHANDLER:
2014 case CPU_WHICH_ITHREAD:
2015 case CPU_WHICH_DOMAIN:
2019 if (level == CPU_LEVEL_ROOT)
2020 nset = cpuset_refroot(set);
2022 nset = cpuset_refbase(set);
2023 domainset_copy(nset->cs_domain, &outset);
2026 case CPU_LEVEL_WHICH:
2030 domainset_copy(ttd->td_cpuset->cs_domain, &outset);
2034 FOREACH_THREAD_IN_PROC(p, ttd) {
2036 dset = ttd->td_cpuset->cs_domain;
2037 /* Show all domains in the proc. */
2038 DOMAINSET_OR(&outset.ds_mask, &dset->ds_mask);
2039 /* Last policy wins. */
2040 outset.ds_policy = dset->ds_policy;
2041 outset.ds_prefer = dset->ds_prefer;
2045 case CPU_WHICH_CPUSET:
2046 case CPU_WHICH_JAIL:
2047 domainset_copy(set->cs_domain, &outset);
2050 case CPU_WHICH_INTRHANDLER:
2051 case CPU_WHICH_ITHREAD:
2052 case CPU_WHICH_DOMAIN:
2066 * Translate prefer into a set containing only the preferred domain,
2067 * not the entire fallback set.
2069 if (outset.ds_policy == DOMAINSET_POLICY_PREFER) {
2070 DOMAINSET_ZERO(&outset.ds_mask);
2071 DOMAINSET_SET(outset.ds_prefer, &outset.ds_mask);
2073 DOMAINSET_COPY(&outset.ds_mask, mask);
2075 error = copyout(mask, maskp, domainsetsize);
2077 if (suword32(policyp, outset.ds_policy) != 0)
2084 #ifndef _SYS_SYSPROTO_H_
2085 struct cpuset_setdomain_args {
2089 size_t domainsetsize;
2095 sys_cpuset_setdomain(struct thread *td, struct cpuset_setdomain_args *uap)
2098 return (kern_cpuset_setdomain(td, uap->level, uap->which,
2099 uap->id, uap->domainsetsize, uap->mask, uap->policy));
2103 kern_cpuset_setdomain(struct thread *td, cpulevel_t level, cpuwhich_t which,
2104 id_t id, size_t domainsetsize, const domainset_t *maskp, int policy)
2106 struct cpuset *nset;
2110 struct domainset domain;
2114 if (domainsetsize < sizeof(domainset_t) ||
2115 domainsetsize > DOMAINSET_MAXSIZE / NBBY)
2117 if (policy <= DOMAINSET_POLICY_INVALID ||
2118 policy > DOMAINSET_POLICY_MAX)
2120 /* In Capability mode, you can only set your own CPU set. */
2121 if (IN_CAPABILITY_MODE(td)) {
2122 if (level != CPU_LEVEL_WHICH)
2124 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
2129 memset(&domain, 0, sizeof(domain));
2130 mask = malloc(domainsetsize, M_TEMP, M_WAITOK | M_ZERO);
2131 error = copyin(maskp, mask, domainsetsize);
2135 * Verify that no high bits are set.
2137 if (domainsetsize > sizeof(domainset_t)) {
2141 end = cp = (char *)&mask->__bits;
2142 end += domainsetsize;
2143 cp += sizeof(domainset_t);
2151 DOMAINSET_COPY(mask, &domain.ds_mask);
2152 domain.ds_policy = policy;
2154 /* Translate preferred policy into a mask and fallback. */
2155 if (policy == DOMAINSET_POLICY_PREFER) {
2156 /* Only support a single preferred domain. */
2157 if (DOMAINSET_COUNT(&domain.ds_mask) != 1) {
2161 domain.ds_prefer = DOMAINSET_FFS(&domain.ds_mask) - 1;
2162 /* This will be constrained by domainset_shadow(). */
2163 DOMAINSET_FILL(&domain.ds_mask);
2167 * When given an impossible policy, fall back to interleaving
2168 * across all domains
2170 if (domainset_empty_vm(&domain))
2171 domainset_copy(&domainset2, &domain);
2174 case CPU_LEVEL_ROOT:
2175 case CPU_LEVEL_CPUSET:
2176 error = cpuset_which(which, id, &p, &ttd, &set);
2183 set = cpuset_ref(ttd->td_cpuset);
2187 case CPU_WHICH_CPUSET:
2188 case CPU_WHICH_JAIL:
2191 case CPU_WHICH_INTRHANDLER:
2192 case CPU_WHICH_ITHREAD:
2193 case CPU_WHICH_DOMAIN:
2197 if (level == CPU_LEVEL_ROOT)
2198 nset = cpuset_refroot(set);
2200 nset = cpuset_refbase(set);
2201 error = cpuset_modify_domain(nset, &domain);
2205 case CPU_LEVEL_WHICH:
2208 error = _cpuset_setthread(id, NULL, &domain);
2211 error = cpuset_setproc(id, NULL, NULL, &domain);
2213 case CPU_WHICH_CPUSET:
2214 case CPU_WHICH_JAIL:
2215 error = cpuset_which(which, id, &p, &ttd, &set);
2217 error = cpuset_modify_domain(set, &domain);
2222 case CPU_WHICH_INTRHANDLER:
2223 case CPU_WHICH_ITHREAD:
2241 ddb_display_bitset(const struct bitset *set, int size)
2245 for (once = 0, bit = 0; bit < size; bit++) {
2246 if (CPU_ISSET(bit, set)) {
2248 db_printf("%d", bit);
2251 db_printf(",%d", bit);
2255 db_printf("<none>");
2259 ddb_display_cpuset(const cpuset_t *set)
2261 ddb_display_bitset((const struct bitset *)set, CPU_SETSIZE);
2265 ddb_display_domainset(const domainset_t *set)
2267 ddb_display_bitset((const struct bitset *)set, DOMAINSET_SETSIZE);
2270 DB_SHOW_COMMAND(cpusets, db_show_cpusets)
2274 LIST_FOREACH(set, &cpuset_ids, cs_link) {
2275 db_printf("set=%p id=%-6u ref=%-6d flags=0x%04x parent id=%d\n",
2276 set, set->cs_id, set->cs_ref, set->cs_flags,
2277 (set->cs_parent != NULL) ? set->cs_parent->cs_id : 0);
2278 db_printf(" cpu mask=");
2279 ddb_display_cpuset(&set->cs_mask);
2281 db_printf(" domain policy %d prefer %d mask=",
2282 set->cs_domain->ds_policy, set->cs_domain->ds_prefer);
2283 ddb_display_domainset(&set->cs_domain->ds_mask);
2290 DB_SHOW_COMMAND(domainsets, db_show_domainsets)
2292 struct domainset *set;
2294 LIST_FOREACH(set, &cpuset_domains, ds_link) {
2295 db_printf("set=%p policy %d prefer %d cnt %d\n",
2296 set, set->ds_policy, set->ds_prefer, set->ds_cnt);
2297 db_printf(" mask =");
2298 ddb_display_domainset(&set->ds_mask);