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 mtx_lock_spin(&cpuset_lock);
462 LIST_FOREACH(ndomain, &cpuset_domains, ds_link)
463 if (domainset_equal(ndomain, domain))
466 * If the domain does not yet exist we insert it and initialize
467 * various iteration helpers which are not part of the key.
469 if (ndomain == NULL) {
470 LIST_INSERT_HEAD(&cpuset_domains, domain, ds_link);
471 domain->ds_cnt = DOMAINSET_COUNT(&domain->ds_mask);
472 max = DOMAINSET_FLS(&domain->ds_mask) + 1;
473 for (i = 0, j = 0; i < max; i++)
474 if (DOMAINSET_ISSET(i, &domain->ds_mask))
475 domain->ds_order[j++] = i;
477 mtx_unlock_spin(&cpuset_lock);
480 if (freelist != NULL)
481 LIST_INSERT_HEAD(freelist, domain, ds_link);
483 uma_zfree(domainset_zone, domain);
489 * Are any of the domains in the mask empty? If so, silently
490 * remove them. If only empty domains are present, we must
494 domainset_empty_vm(struct domainset *domain)
498 max = DOMAINSET_FLS(&domain->ds_mask) + 1;
499 for (i = 0; i < max; i++) {
500 if (DOMAINSET_ISSET(i, &domain->ds_mask) &&
502 DOMAINSET_CLR(i, &domain->ds_mask);
505 return (DOMAINSET_EMPTY(&domain->ds_mask));
509 * Create or lookup a domainset based on the key held in 'domain'.
512 domainset_create(const struct domainset *domain)
514 struct domainset *ndomain;
517 * Validate the policy. It must specify a useable policy number with
518 * only valid domains. Preferred must include the preferred domain
521 if (domain->ds_policy <= DOMAINSET_POLICY_INVALID ||
522 domain->ds_policy > DOMAINSET_POLICY_MAX)
524 if (domain->ds_policy == DOMAINSET_POLICY_PREFER &&
525 !DOMAINSET_ISSET(domain->ds_prefer, &domain->ds_mask))
527 if (!DOMAINSET_SUBSET(&domainset0.ds_mask, &domain->ds_mask))
529 ndomain = uma_zalloc(domainset_zone, M_WAITOK | M_ZERO);
530 domainset_copy(domain, ndomain);
531 return _domainset_create(ndomain, NULL);
535 * Update thread domainset pointers.
538 domainset_notify(void)
543 sx_slock(&allproc_lock);
544 FOREACH_PROC_IN_SYSTEM(p) {
546 if (p->p_state == PRS_NEW) {
550 FOREACH_THREAD_IN_PROC(p, td) {
552 td->td_domain.dr_policy = td->td_cpuset->cs_domain;
557 sx_sunlock(&allproc_lock);
558 kernel_object->domain.dr_policy = cpuset_kernel->cs_domain;
562 * Create a new set that is a subset of a parent.
564 static struct domainset *
565 domainset_shadow(const struct domainset *pdomain,
566 const struct domainset *domain, struct domainlist *freelist)
568 struct domainset *ndomain;
570 ndomain = LIST_FIRST(freelist);
571 LIST_REMOVE(ndomain, ds_link);
574 * Initialize the key from the request.
576 domainset_copy(domain, ndomain);
579 * Restrict the key by the parent.
581 DOMAINSET_AND(&ndomain->ds_mask, &pdomain->ds_mask);
583 return _domainset_create(ndomain, freelist);
587 * Recursively check for errors that would occur from applying mask to
588 * the tree of sets starting at 'set'. Checks for sets that would become
589 * empty as well as RDONLY flags.
592 cpuset_testupdate(struct cpuset *set, cpuset_t *mask, int check_mask)
598 mtx_assert(&cpuset_lock, MA_OWNED);
599 if (set->cs_flags & CPU_SET_RDONLY)
602 if (!CPU_OVERLAP(&set->cs_mask, mask))
604 CPU_COPY(&set->cs_mask, &newmask);
605 CPU_AND(&newmask, mask);
607 CPU_COPY(mask, &newmask);
609 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
610 if ((error = cpuset_testupdate(nset, &newmask, 1)) != 0)
616 * Applies the mask 'mask' without checking for empty sets or permissions.
619 cpuset_update(struct cpuset *set, cpuset_t *mask)
623 mtx_assert(&cpuset_lock, MA_OWNED);
624 CPU_AND(&set->cs_mask, mask);
625 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
626 cpuset_update(nset, &set->cs_mask);
632 * Modify the set 'set' to use a copy of the mask provided. Apply this new
633 * mask to restrict all children in the tree. Checks for validity before
634 * applying the changes.
637 cpuset_modify(struct cpuset *set, cpuset_t *mask)
642 error = priv_check(curthread, PRIV_SCHED_CPUSET);
646 * In case we are called from within the jail
647 * we do not allow modifying the dedicated root
648 * cpuset of the jail but may still allow to
651 if (jailed(curthread->td_ucred) &&
652 set->cs_flags & CPU_SET_ROOT)
655 * Verify that we have access to this set of
658 root = cpuset_getroot(set);
659 mtx_lock_spin(&cpuset_lock);
660 if (root && !CPU_SUBSET(&root->cs_mask, mask)) {
664 error = cpuset_testupdate(set, mask, 0);
667 CPU_COPY(mask, &set->cs_mask);
668 cpuset_update(set, mask);
670 mtx_unlock_spin(&cpuset_lock);
676 * Recursively check for errors that would occur from applying mask to
677 * the tree of sets starting at 'set'. Checks for sets that would become
678 * empty as well as RDONLY flags.
681 cpuset_testupdate_domain(struct cpuset *set, struct domainset *dset,
682 struct domainset *orig, int *count, int check_mask)
685 struct domainset *domain;
686 struct domainset newset;
689 mtx_assert(&cpuset_lock, MA_OWNED);
690 if (set->cs_flags & CPU_SET_RDONLY)
692 domain = set->cs_domain;
693 domainset_copy(domain, &newset);
694 if (!domainset_equal(domain, orig)) {
695 if (!domainset_restrict(domain, dset))
697 DOMAINSET_AND(&newset.ds_mask, &dset->ds_mask);
698 /* Count the number of domains that are changing. */
702 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
703 if ((error = cpuset_testupdate_domain(nset, &newset, domain,
710 * Applies the mask 'mask' without checking for empty sets or permissions.
713 cpuset_update_domain(struct cpuset *set, struct domainset *domain,
714 struct domainset *orig, struct domainlist *domains)
718 mtx_assert(&cpuset_lock, MA_OWNED);
720 * If this domainset has changed from the parent we must calculate
721 * a new set. Otherwise it simply inherits from the parent. When
722 * we inherit from the parent we get a new mask and policy. If the
723 * set is modified from the parent we keep the policy and only
726 if (set->cs_domain != orig) {
727 orig = set->cs_domain;
728 set->cs_domain = domainset_shadow(domain, orig, domains);
730 set->cs_domain = domain;
731 LIST_FOREACH(nset, &set->cs_children, cs_siblings)
732 cpuset_update_domain(nset, set->cs_domain, orig, domains);
738 * Modify the set 'set' to use a copy the domainset provided. Apply this new
739 * mask to restrict all children in the tree. Checks for validity before
740 * applying the changes.
743 cpuset_modify_domain(struct cpuset *set, struct domainset *domain)
745 struct domainlist domains;
746 struct domainset temp;
747 struct domainset *dset;
749 int ndomains, needed;
752 error = priv_check(curthread, PRIV_SCHED_CPUSET);
756 * In case we are called from within the jail
757 * we do not allow modifying the dedicated root
758 * cpuset of the jail but may still allow to
761 if (jailed(curthread->td_ucred) &&
762 set->cs_flags & CPU_SET_ROOT)
764 domainset_freelist_init(&domains, 0);
765 domain = domainset_create(domain);
766 ndomains = needed = 0;
768 if (ndomains < needed) {
769 domainset_freelist_add(&domains, needed - ndomains);
772 root = cpuset_getroot(set);
773 mtx_lock_spin(&cpuset_lock);
774 dset = root->cs_domain;
776 * Verify that we have access to this set of domains.
778 if (root && !domainset_valid(dset, domain)) {
783 * If applying prefer we keep the current set as the fallback.
785 if (domain->ds_policy == DOMAINSET_POLICY_PREFER)
786 DOMAINSET_COPY(&set->cs_domain->ds_mask,
789 * Determine whether we can apply this set of domains and
790 * how many new domain structures it will require.
792 domainset_copy(domain, &temp);
794 error = cpuset_testupdate_domain(set, &temp, set->cs_domain,
798 } while (ndomains < needed);
799 dset = set->cs_domain;
800 cpuset_update_domain(set, domain, dset, &domains);
802 mtx_unlock_spin(&cpuset_lock);
803 domainset_freelist_free(&domains);
811 * Resolve the 'which' parameter of several cpuset apis.
813 * For WHICH_PID and WHICH_TID return a locked proc and valid proc/tid. Also
814 * checks for permission via p_cansched().
816 * For WHICH_SET returns a valid set with a new reference.
818 * -1 may be supplied for any argument to mean the current proc/thread or
819 * the base set of the current thread. May fail with ESRCH/EPERM.
822 cpuset_which(cpuwhich_t which, id_t id, struct proc **pp, struct thread **tdp,
823 struct cpuset **setp)
840 if ((p = pfind(id)) == NULL)
855 case CPU_WHICH_CPUSET:
857 thread_lock(curthread);
858 set = cpuset_refbase(curthread->td_cpuset);
859 thread_unlock(curthread);
861 set = cpuset_lookup(id, curthread);
869 /* Find `set' for prison with given id. */
872 sx_slock(&allprison_lock);
873 pr = prison_find_child(curthread->td_ucred->cr_prison, id);
874 sx_sunlock(&allprison_lock);
877 cpuset_ref(pr->pr_cpuset);
878 *setp = pr->pr_cpuset;
879 mtx_unlock(&pr->pr_mtx);
883 case CPU_WHICH_DOMAIN:
888 error = p_cansched(curthread, p);
894 td = FIRST_THREAD_IN_PROC(p);
901 cpuset_testshadow(struct cpuset *set, const cpuset_t *mask,
902 const struct domainset *domain)
904 struct cpuset *parent;
905 struct domainset *dset;
907 parent = cpuset_getbase(set);
909 * If we are restricting a cpu mask it must be a subset of the
910 * parent or invalid CPUs have been specified.
912 if (mask != NULL && !CPU_SUBSET(&parent->cs_mask, mask))
916 * If we are restricting a domain mask it must be a subset of the
917 * parent or invalid domains have been specified.
919 dset = parent->cs_domain;
920 if (domain != NULL && !domainset_valid(dset, domain))
927 * Create an anonymous set with the provided mask in the space provided by
928 * 'nset'. If the passed in set is anonymous we use its parent otherwise
929 * the new set is a child of 'set'.
932 cpuset_shadow(struct cpuset *set, struct cpuset **nsetp,
933 const cpuset_t *mask, const struct domainset *domain,
934 struct setlist *cpusets, struct domainlist *domains)
936 struct cpuset *parent;
938 struct domainset *dset;
942 error = cpuset_testshadow(set, mask, domain);
946 parent = cpuset_getbase(set);
947 dset = parent->cs_domain;
949 mask = &set->cs_mask;
951 d = domainset_shadow(dset, domain, domains);
954 nset = LIST_FIRST(cpusets);
955 error = _cpuset_create(nset, parent, mask, d, CPUSET_INVALID);
957 LIST_REMOVE(nset, cs_link);
963 static struct cpuset *
964 cpuset_update_thread(struct thread *td, struct cpuset *nset)
966 struct cpuset *tdset;
968 tdset = td->td_cpuset;
969 td->td_cpuset = nset;
970 td->td_domain.dr_policy = nset->cs_domain;
977 cpuset_setproc_test_maskthread(struct cpuset *tdset, cpuset_t *mask,
978 struct domainset *domain)
980 struct cpuset *parent;
982 parent = cpuset_getbase(tdset);
984 mask = &tdset->cs_mask;
986 domain = tdset->cs_domain;
987 return cpuset_testshadow(parent, mask, domain);
991 cpuset_setproc_maskthread(struct cpuset *tdset, cpuset_t *mask,
992 struct domainset *domain, struct cpuset **nsetp,
993 struct setlist *freelist, struct domainlist *domainlist)
995 struct cpuset *parent;
997 parent = cpuset_getbase(tdset);
999 mask = &tdset->cs_mask;
1001 domain = tdset->cs_domain;
1002 return cpuset_shadow(parent, nsetp, mask, domain, freelist,
1007 cpuset_setproc_setthread_mask(struct cpuset *tdset, struct cpuset *set,
1008 cpuset_t *mask, struct domainset *domain)
1010 struct cpuset *parent;
1012 parent = cpuset_getbase(tdset);
1015 * If the thread restricted its mask then apply that same
1016 * restriction to the new set, otherwise take it wholesale.
1018 if (CPU_CMP(&tdset->cs_mask, &parent->cs_mask) != 0) {
1019 CPU_COPY(&tdset->cs_mask, mask);
1020 CPU_AND(mask, &set->cs_mask);
1022 CPU_COPY(&set->cs_mask, mask);
1025 * If the thread restricted the domain then we apply the
1026 * restriction to the new set but retain the policy.
1028 if (tdset->cs_domain != parent->cs_domain) {
1029 domainset_copy(tdset->cs_domain, domain);
1030 DOMAINSET_AND(&domain->ds_mask, &set->cs_domain->ds_mask);
1032 domainset_copy(set->cs_domain, domain);
1034 if (CPU_EMPTY(mask) || DOMAINSET_EMPTY(&domain->ds_mask))
1041 cpuset_setproc_test_setthread(struct cpuset *tdset, struct cpuset *set)
1043 struct domainset domain;
1046 if (tdset->cs_id != CPUSET_INVALID)
1048 return cpuset_setproc_setthread_mask(tdset, set, &mask, &domain);
1052 cpuset_setproc_setthread(struct cpuset *tdset, struct cpuset *set,
1053 struct cpuset **nsetp, struct setlist *freelist,
1054 struct domainlist *domainlist)
1056 struct domainset domain;
1061 * If we're replacing on a thread that has not constrained the
1062 * original set we can simply accept the new set.
1064 if (tdset->cs_id != CPUSET_INVALID) {
1065 *nsetp = cpuset_ref(set);
1068 error = cpuset_setproc_setthread_mask(tdset, set, &mask, &domain);
1072 return cpuset_shadow(tdset, nsetp, &mask, &domain, freelist,
1077 * Handle three cases for updating an entire process.
1079 * 1) Set is non-null. This reparents all anonymous sets to the provided
1080 * set and replaces all non-anonymous td_cpusets with the provided set.
1081 * 2) Mask is non-null. This replaces or creates anonymous sets for every
1082 * thread with the existing base as a parent.
1083 * 3) domain is non-null. This creates anonymous sets for every thread
1084 * and replaces the domain set.
1086 * This is overly complicated because we can't allocate while holding a
1087 * spinlock and spinlocks must be held while changing and examining thread
1091 cpuset_setproc(pid_t pid, struct cpuset *set, cpuset_t *mask,
1092 struct domainset *domain)
1094 struct setlist freelist;
1095 struct setlist droplist;
1096 struct domainlist domainlist;
1097 struct cpuset *nset;
1105 * The algorithm requires two passes due to locking considerations.
1107 * 1) Lookup the process and acquire the locks in the required order.
1108 * 2) If enough cpusets have not been allocated release the locks and
1109 * allocate them. Loop.
1111 cpuset_freelist_init(&freelist, 1);
1112 domainset_freelist_init(&domainlist, 1);
1114 LIST_INIT(&droplist);
1117 error = cpuset_which(CPU_WHICH_PID, pid, &p, &td, &nset);
1120 if (nfree >= p->p_numthreads)
1122 threads = p->p_numthreads;
1124 if (nfree < threads) {
1125 cpuset_freelist_add(&freelist, threads - nfree);
1126 domainset_freelist_add(&domainlist, threads - nfree);
1130 PROC_LOCK_ASSERT(p, MA_OWNED);
1132 * Now that the appropriate locks are held and we have enough cpusets,
1133 * make sure the operation will succeed before applying changes. The
1134 * proc lock prevents td_cpuset from changing between calls.
1137 FOREACH_THREAD_IN_PROC(p, td) {
1140 error = cpuset_setproc_test_setthread(td->td_cpuset,
1143 error = cpuset_setproc_test_maskthread(td->td_cpuset,
1150 * Replace each thread's cpuset while using deferred release. We
1151 * must do this because the thread lock must be held while operating
1152 * on the thread and this limits the type of operations allowed.
1154 FOREACH_THREAD_IN_PROC(p, td) {
1157 error = cpuset_setproc_setthread(td->td_cpuset, set,
1158 &nset, &freelist, &domainlist);
1160 error = cpuset_setproc_maskthread(td->td_cpuset, mask,
1161 domain, &nset, &freelist, &domainlist);
1166 cpuset_rel_defer(&droplist, cpuset_update_thread(td, nset));
1172 while ((nset = LIST_FIRST(&droplist)) != NULL)
1173 cpuset_rel_complete(nset);
1174 cpuset_freelist_free(&freelist);
1175 domainset_freelist_free(&domainlist);
1180 bitset_strprint(char *buf, size_t bufsiz, const struct bitset *set, int setlen)
1188 for (i = 0; i < __bitset_words(setlen); i++) {
1197 if (bufsiz < sizeof(__STRING(ULONG_MAX)))
1199 bytes = snprintf(p, bufsiz, "%lx", set->__bits[i]);
1207 bitset_strscan(struct bitset *set, int setlen, const char *buf)
1212 BIT_ZERO(setlen, set);
1214 for (i = 0; i < __bitset_words(setlen); i++) {
1219 ret = sscanf(p, "%lx", &set->__bits[i]);
1220 if (ret == 0 || ret == -1)
1222 while (isxdigit(*p))
1229 * Return a string representing a valid layout for a cpuset_t object.
1230 * It expects an incoming buffer at least sized as CPUSETBUFSIZ.
1233 cpusetobj_strprint(char *buf, const cpuset_t *set)
1236 bitset_strprint(buf, CPUSETBUFSIZ, (const struct bitset *)set,
1242 * Build a valid cpuset_t object from a string representation.
1243 * It expects an incoming buffer at least sized as CPUSETBUFSIZ.
1246 cpusetobj_strscan(cpuset_t *set, const char *buf)
1250 if (strlen(buf) > CPUSETBUFSIZ - 1)
1253 p = buf[bitset_strscan((struct bitset *)set, CPU_SETSIZE, buf)];
1261 * Handle a domainset specifier in the sysctl tree. A poiner to a pointer to
1262 * a domainset is in arg1. If the user specifies a valid domainset the
1263 * pointer is updated.
1266 * hex mask word 0,hex mask word 1,...:decimal policy:decimal preferred
1269 sysctl_handle_domainset(SYSCTL_HANDLER_ARGS)
1271 char buf[DOMAINSETBUFSIZ];
1272 struct domainset *dset;
1273 struct domainset key;
1274 int policy, prefer, error;
1277 dset = *(struct domainset **)arg1;
1281 p = buf + bitset_strprint(buf, DOMAINSETBUFSIZ,
1282 (const struct bitset *)&dset->ds_mask, DOMAINSET_SETSIZE);
1283 sprintf(p, ":%d:%d", dset->ds_policy, dset->ds_prefer);
1285 sprintf(buf, "<NULL>");
1286 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
1287 if (error != 0 || req->newptr == NULL)
1291 * Read in and validate the string.
1293 memset(&key, 0, sizeof(key));
1294 p = &buf[bitset_strscan((struct bitset *)&key.ds_mask,
1295 DOMAINSET_SETSIZE, buf)];
1298 if (sscanf(p, ":%d:%d", &policy, &prefer) != 2)
1300 key.ds_policy = policy;
1301 key.ds_prefer = prefer;
1303 /* Domainset_create() validates the policy.*/
1304 dset = domainset_create(&key);
1307 *(struct domainset **)arg1 = dset;
1313 * Apply an anonymous mask or a domain to a single thread.
1316 _cpuset_setthread(lwpid_t id, cpuset_t *mask, struct domainset *domain)
1318 struct setlist cpusets;
1319 struct domainlist domainlist;
1320 struct cpuset *nset;
1326 cpuset_freelist_init(&cpusets, 1);
1327 domainset_freelist_init(&domainlist, domain != NULL);
1328 error = cpuset_which(CPU_WHICH_TID, id, &p, &td, &set);
1333 error = cpuset_shadow(td->td_cpuset, &nset, mask, domain,
1334 &cpusets, &domainlist);
1336 set = cpuset_update_thread(td, nset);
1342 cpuset_freelist_free(&cpusets);
1343 domainset_freelist_free(&domainlist);
1348 * Apply an anonymous mask to a single thread.
1351 cpuset_setthread(lwpid_t id, cpuset_t *mask)
1354 return _cpuset_setthread(id, mask, NULL);
1358 * Apply new cpumask to the ithread.
1361 cpuset_setithread(lwpid_t id, int cpu)
1367 CPU_COPY(cpuset_root, &mask);
1369 CPU_SET(cpu, &mask);
1370 return _cpuset_setthread(id, &mask, NULL);
1374 * Initialize static domainsets after NUMA information is available. This is
1375 * called very early during boot.
1378 domainset_init(void)
1380 struct domainset *dset;
1383 dset = &domainset_roundrobin;
1384 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1385 dset->ds_policy = DOMAINSET_POLICY_ROUNDROBIN;
1386 dset->ds_prefer = -1;
1387 _domainset_create(dset, NULL);
1389 for (i = 0; i < vm_ndomains; i++) {
1390 dset = &domainset_prefer[i];
1391 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1392 dset->ds_policy = DOMAINSET_POLICY_PREFER;
1393 dset->ds_prefer = i;
1394 _domainset_create(dset, NULL);
1399 * Create the domainset for cpuset 0, 1 and cpuset 2.
1402 domainset_zero(void)
1404 struct domainset *dset;
1406 mtx_init(&cpuset_lock, "cpuset", NULL, MTX_SPIN | MTX_RECURSE);
1409 DOMAINSET_COPY(&all_domains, &dset->ds_mask);
1410 dset->ds_policy = DOMAINSET_POLICY_FIRSTTOUCH;
1411 dset->ds_prefer = -1;
1412 curthread->td_domain.dr_policy = _domainset_create(dset, NULL);
1414 domainset_copy(dset, &domainset2);
1415 domainset2.ds_policy = DOMAINSET_POLICY_INTERLEAVE;
1416 kernel_object->domain.dr_policy = _domainset_create(&domainset2, NULL);
1418 /* Remove empty domains from the global policies. */
1419 LIST_FOREACH(dset, &cpuset_domains, ds_link)
1420 (void)domainset_empty_vm(dset);
1424 * Creates system-wide cpusets and the cpuset for thread0 including three
1427 * 0 - The root set which should represent all valid processors in the
1428 * system. It is initially created with a mask of all processors
1429 * because we don't know what processors are valid until cpuset_init()
1430 * runs. This set is immutable.
1431 * 1 - The default set which all processes are a member of until changed.
1432 * This allows an administrator to move all threads off of given cpus to
1433 * dedicate them to high priority tasks or save power etc.
1434 * 2 - The kernel set which allows restriction and policy to be applied only
1435 * to kernel threads and the kernel_object.
1438 cpuset_thread0(void)
1444 cpuset_zone = uma_zcreate("cpuset", sizeof(struct cpuset), NULL, NULL,
1445 NULL, NULL, UMA_ALIGN_CACHE, 0);
1446 domainset_zone = uma_zcreate("domainset", sizeof(struct domainset),
1447 NULL, NULL, NULL, NULL, UMA_ALIGN_CACHE, 0);
1450 * Create the root system set (0) for the whole machine. Doesn't use
1451 * cpuset_create() due to NULL parent.
1453 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1454 CPU_COPY(&all_cpus, &set->cs_mask);
1455 LIST_INIT(&set->cs_children);
1456 LIST_INSERT_HEAD(&cpuset_ids, set, cs_link);
1458 set->cs_flags = CPU_SET_ROOT | CPU_SET_RDONLY;
1459 set->cs_domain = &domainset0;
1461 cpuset_root = &set->cs_mask;
1464 * Now derive a default (1), modifiable set from that to give out.
1466 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1467 error = _cpuset_create(set, cpuset_zero, NULL, NULL, 1);
1468 KASSERT(error == 0, ("Error creating default set: %d\n", error));
1469 cpuset_default = set;
1471 * Create the kernel set (2).
1473 set = uma_zalloc(cpuset_zone, M_WAITOK | M_ZERO);
1474 error = _cpuset_create(set, cpuset_zero, NULL, NULL, 2);
1475 KASSERT(error == 0, ("Error creating kernel set: %d\n", error));
1476 set->cs_domain = &domainset2;
1477 cpuset_kernel = set;
1480 * Initialize the unit allocator. 0 and 1 are allocated above.
1482 cpuset_unr = new_unrhdr(2, INT_MAX, NULL);
1485 * If MD code has not initialized per-domain cpusets, place all
1488 for (i = 0; i < MAXMEMDOM; i++)
1489 if (!CPU_EMPTY(&cpuset_domain[i]))
1491 CPU_COPY(&all_cpus, &cpuset_domain[0]);
1494 return (cpuset_default);
1498 cpuset_kernthread(struct thread *td)
1503 set = td->td_cpuset;
1504 td->td_cpuset = cpuset_ref(cpuset_kernel);
1510 * Create a cpuset, which would be cpuset_create() but
1511 * mark the new 'set' as root.
1513 * We are not going to reparent the td to it. Use cpuset_setproc_update_set()
1516 * In case of no error, returns the set in *setp locked with a reference.
1519 cpuset_create_root(struct prison *pr, struct cpuset **setp)
1524 KASSERT(pr != NULL, ("[%s:%d] invalid pr", __func__, __LINE__));
1525 KASSERT(setp != NULL, ("[%s:%d] invalid setp", __func__, __LINE__));
1527 error = cpuset_create(setp, pr->pr_cpuset, &pr->pr_cpuset->cs_mask);
1531 KASSERT(*setp != NULL, ("[%s:%d] cpuset_create returned invalid data",
1532 __func__, __LINE__));
1534 /* Mark the set as root. */
1536 set->cs_flags |= CPU_SET_ROOT;
1542 cpuset_setproc_update_set(struct proc *p, struct cpuset *set)
1546 KASSERT(p != NULL, ("[%s:%d] invalid proc", __func__, __LINE__));
1547 KASSERT(set != NULL, ("[%s:%d] invalid set", __func__, __LINE__));
1550 error = cpuset_setproc(p->p_pid, set, NULL, NULL);
1557 #ifndef _SYS_SYSPROTO_H_
1558 struct cpuset_args {
1563 sys_cpuset(struct thread *td, struct cpuset_args *uap)
1565 struct cpuset *root;
1570 root = cpuset_refroot(td->td_cpuset);
1572 error = cpuset_create(&set, root, &root->cs_mask);
1576 error = copyout(&set->cs_id, uap->setid, sizeof(set->cs_id));
1578 error = cpuset_setproc(-1, set, NULL, NULL);
1583 #ifndef _SYS_SYSPROTO_H_
1584 struct cpuset_setid_args {
1591 sys_cpuset_setid(struct thread *td, struct cpuset_setid_args *uap)
1594 return (kern_cpuset_setid(td, uap->which, uap->id, uap->setid));
1598 kern_cpuset_setid(struct thread *td, cpuwhich_t which,
1599 id_t id, cpusetid_t setid)
1605 * Presently we only support per-process sets.
1607 if (which != CPU_WHICH_PID)
1609 set = cpuset_lookup(setid, td);
1612 error = cpuset_setproc(id, set, NULL, NULL);
1617 #ifndef _SYS_SYSPROTO_H_
1618 struct cpuset_getid_args {
1626 sys_cpuset_getid(struct thread *td, struct cpuset_getid_args *uap)
1629 return (kern_cpuset_getid(td, uap->level, uap->which, uap->id,
1634 kern_cpuset_getid(struct thread *td, cpulevel_t level, cpuwhich_t which,
1635 id_t id, cpusetid_t *setid)
1637 struct cpuset *nset;
1644 if (level == CPU_LEVEL_WHICH && which != CPU_WHICH_CPUSET)
1646 error = cpuset_which(which, id, &p, &ttd, &set);
1653 set = cpuset_refbase(ttd->td_cpuset);
1657 case CPU_WHICH_CPUSET:
1658 case CPU_WHICH_JAIL:
1661 case CPU_WHICH_DOMAIN:
1665 case CPU_LEVEL_ROOT:
1666 nset = cpuset_refroot(set);
1670 case CPU_LEVEL_CPUSET:
1672 case CPU_LEVEL_WHICH:
1678 error = copyout(&tmpid, setid, sizeof(tmpid));
1683 #ifndef _SYS_SYSPROTO_H_
1684 struct cpuset_getaffinity_args {
1693 sys_cpuset_getaffinity(struct thread *td, struct cpuset_getaffinity_args *uap)
1696 return (kern_cpuset_getaffinity(td, uap->level, uap->which,
1697 uap->id, uap->cpusetsize, uap->mask));
1701 kern_cpuset_getaffinity(struct thread *td, cpulevel_t level, cpuwhich_t which,
1702 id_t id, size_t cpusetsize, cpuset_t *maskp)
1705 struct cpuset *nset;
1712 if (cpusetsize < sizeof(cpuset_t) || cpusetsize > CPU_MAXSIZE / NBBY)
1714 /* In Capability mode, you can only get your own CPU set. */
1715 if (IN_CAPABILITY_MODE(td)) {
1716 if (level != CPU_LEVEL_WHICH)
1718 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
1724 mask = malloc(size, M_TEMP, M_WAITOK | M_ZERO);
1725 error = cpuset_which(which, id, &p, &ttd, &set);
1729 case CPU_LEVEL_ROOT:
1730 case CPU_LEVEL_CPUSET:
1735 set = cpuset_ref(ttd->td_cpuset);
1738 case CPU_WHICH_CPUSET:
1739 case CPU_WHICH_JAIL:
1742 case CPU_WHICH_INTRHANDLER:
1743 case CPU_WHICH_ITHREAD:
1744 case CPU_WHICH_DOMAIN:
1748 if (level == CPU_LEVEL_ROOT)
1749 nset = cpuset_refroot(set);
1751 nset = cpuset_refbase(set);
1752 CPU_COPY(&nset->cs_mask, mask);
1755 case CPU_LEVEL_WHICH:
1759 CPU_COPY(&ttd->td_cpuset->cs_mask, mask);
1763 FOREACH_THREAD_IN_PROC(p, ttd) {
1765 CPU_OR(mask, &ttd->td_cpuset->cs_mask);
1769 case CPU_WHICH_CPUSET:
1770 case CPU_WHICH_JAIL:
1771 CPU_COPY(&set->cs_mask, mask);
1774 case CPU_WHICH_INTRHANDLER:
1775 case CPU_WHICH_ITHREAD:
1776 error = intr_getaffinity(id, which, mask);
1778 case CPU_WHICH_DOMAIN:
1779 if (id < 0 || id >= MAXMEMDOM)
1782 CPU_COPY(&cpuset_domain[id], mask);
1795 error = copyout(mask, maskp, size);
1801 #ifndef _SYS_SYSPROTO_H_
1802 struct cpuset_setaffinity_args {
1807 const cpuset_t *mask;
1811 sys_cpuset_setaffinity(struct thread *td, struct cpuset_setaffinity_args *uap)
1814 return (kern_cpuset_setaffinity(td, uap->level, uap->which,
1815 uap->id, uap->cpusetsize, uap->mask));
1819 kern_cpuset_setaffinity(struct thread *td, cpulevel_t level, cpuwhich_t which,
1820 id_t id, size_t cpusetsize, const cpuset_t *maskp)
1822 struct cpuset *nset;
1829 if (cpusetsize < sizeof(cpuset_t) || cpusetsize > CPU_MAXSIZE / NBBY)
1831 /* In Capability mode, you can only set your own CPU set. */
1832 if (IN_CAPABILITY_MODE(td)) {
1833 if (level != CPU_LEVEL_WHICH)
1835 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
1840 mask = malloc(cpusetsize, M_TEMP, M_WAITOK | M_ZERO);
1841 error = copyin(maskp, mask, cpusetsize);
1845 * Verify that no high bits are set.
1847 if (cpusetsize > sizeof(cpuset_t)) {
1851 end = cp = (char *)&mask->__bits;
1853 cp += sizeof(cpuset_t);
1862 case CPU_LEVEL_ROOT:
1863 case CPU_LEVEL_CPUSET:
1864 error = cpuset_which(which, id, &p, &ttd, &set);
1871 set = cpuset_ref(ttd->td_cpuset);
1875 case CPU_WHICH_CPUSET:
1876 case CPU_WHICH_JAIL:
1879 case CPU_WHICH_INTRHANDLER:
1880 case CPU_WHICH_ITHREAD:
1881 case CPU_WHICH_DOMAIN:
1885 if (level == CPU_LEVEL_ROOT)
1886 nset = cpuset_refroot(set);
1888 nset = cpuset_refbase(set);
1889 error = cpuset_modify(nset, mask);
1893 case CPU_LEVEL_WHICH:
1896 error = cpuset_setthread(id, mask);
1899 error = cpuset_setproc(id, NULL, mask, NULL);
1901 case CPU_WHICH_CPUSET:
1902 case CPU_WHICH_JAIL:
1903 error = cpuset_which(which, id, &p, &ttd, &set);
1905 error = cpuset_modify(set, mask);
1910 case CPU_WHICH_INTRHANDLER:
1911 case CPU_WHICH_ITHREAD:
1912 error = intr_setaffinity(id, which, mask);
1928 #ifndef _SYS_SYSPROTO_H_
1929 struct cpuset_getdomain_args {
1933 size_t domainsetsize;
1939 sys_cpuset_getdomain(struct thread *td, struct cpuset_getdomain_args *uap)
1942 return (kern_cpuset_getdomain(td, uap->level, uap->which,
1943 uap->id, uap->domainsetsize, uap->mask, uap->policy));
1947 kern_cpuset_getdomain(struct thread *td, cpulevel_t level, cpuwhich_t which,
1948 id_t id, size_t domainsetsize, domainset_t *maskp, int *policyp)
1950 struct domainset outset;
1952 struct cpuset *nset;
1954 struct domainset *dset;
1959 if (domainsetsize < sizeof(domainset_t) ||
1960 domainsetsize > DOMAINSET_MAXSIZE / NBBY)
1962 /* In Capability mode, you can only get your own domain set. */
1963 if (IN_CAPABILITY_MODE(td)) {
1964 if (level != CPU_LEVEL_WHICH)
1966 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
1971 mask = malloc(domainsetsize, M_TEMP, M_WAITOK | M_ZERO);
1972 bzero(&outset, sizeof(outset));
1973 error = cpuset_which(which, id, &p, &ttd, &set);
1977 case CPU_LEVEL_ROOT:
1978 case CPU_LEVEL_CPUSET:
1983 set = cpuset_ref(ttd->td_cpuset);
1986 case CPU_WHICH_CPUSET:
1987 case CPU_WHICH_JAIL:
1990 case CPU_WHICH_INTRHANDLER:
1991 case CPU_WHICH_ITHREAD:
1992 case CPU_WHICH_DOMAIN:
1996 if (level == CPU_LEVEL_ROOT)
1997 nset = cpuset_refroot(set);
1999 nset = cpuset_refbase(set);
2000 domainset_copy(nset->cs_domain, &outset);
2003 case CPU_LEVEL_WHICH:
2007 domainset_copy(ttd->td_cpuset->cs_domain, &outset);
2011 FOREACH_THREAD_IN_PROC(p, ttd) {
2013 dset = ttd->td_cpuset->cs_domain;
2014 /* Show all domains in the proc. */
2015 DOMAINSET_OR(&outset.ds_mask, &dset->ds_mask);
2016 /* Last policy wins. */
2017 outset.ds_policy = dset->ds_policy;
2018 outset.ds_prefer = dset->ds_prefer;
2022 case CPU_WHICH_CPUSET:
2023 case CPU_WHICH_JAIL:
2024 domainset_copy(set->cs_domain, &outset);
2027 case CPU_WHICH_INTRHANDLER:
2028 case CPU_WHICH_ITHREAD:
2029 case CPU_WHICH_DOMAIN:
2043 * Translate prefer into a set containing only the preferred domain,
2044 * not the entire fallback set.
2046 if (outset.ds_policy == DOMAINSET_POLICY_PREFER) {
2047 DOMAINSET_ZERO(&outset.ds_mask);
2048 DOMAINSET_SET(outset.ds_prefer, &outset.ds_mask);
2050 DOMAINSET_COPY(&outset.ds_mask, mask);
2052 error = copyout(mask, maskp, domainsetsize);
2054 if (suword32(policyp, outset.ds_policy) != 0)
2061 #ifndef _SYS_SYSPROTO_H_
2062 struct cpuset_setdomain_args {
2066 size_t domainsetsize;
2072 sys_cpuset_setdomain(struct thread *td, struct cpuset_setdomain_args *uap)
2075 return (kern_cpuset_setdomain(td, uap->level, uap->which,
2076 uap->id, uap->domainsetsize, uap->mask, uap->policy));
2080 kern_cpuset_setdomain(struct thread *td, cpulevel_t level, cpuwhich_t which,
2081 id_t id, size_t domainsetsize, const domainset_t *maskp, int policy)
2083 struct cpuset *nset;
2087 struct domainset domain;
2091 if (domainsetsize < sizeof(domainset_t) ||
2092 domainsetsize > DOMAINSET_MAXSIZE / NBBY)
2094 if (policy <= DOMAINSET_POLICY_INVALID ||
2095 policy > DOMAINSET_POLICY_MAX)
2097 /* In Capability mode, you can only set your own CPU set. */
2098 if (IN_CAPABILITY_MODE(td)) {
2099 if (level != CPU_LEVEL_WHICH)
2101 if (which != CPU_WHICH_TID && which != CPU_WHICH_PID)
2106 memset(&domain, 0, sizeof(domain));
2107 mask = malloc(domainsetsize, M_TEMP, M_WAITOK | M_ZERO);
2108 error = copyin(maskp, mask, domainsetsize);
2112 * Verify that no high bits are set.
2114 if (domainsetsize > sizeof(domainset_t)) {
2118 end = cp = (char *)&mask->__bits;
2119 end += domainsetsize;
2120 cp += sizeof(domainset_t);
2128 DOMAINSET_COPY(mask, &domain.ds_mask);
2129 domain.ds_policy = policy;
2131 /* Translate preferred policy into a mask and fallback. */
2132 if (policy == DOMAINSET_POLICY_PREFER) {
2133 /* Only support a single preferred domain. */
2134 if (DOMAINSET_COUNT(&domain.ds_mask) != 1) {
2138 domain.ds_prefer = DOMAINSET_FFS(&domain.ds_mask) - 1;
2139 /* This will be constrained by domainset_shadow(). */
2140 DOMAINSET_FILL(&domain.ds_mask);
2144 * When given an impossible policy, fall back to interleaving
2145 * across all domains
2147 if (domainset_empty_vm(&domain))
2148 domainset_copy(&domainset2, &domain);
2151 case CPU_LEVEL_ROOT:
2152 case CPU_LEVEL_CPUSET:
2153 error = cpuset_which(which, id, &p, &ttd, &set);
2160 set = cpuset_ref(ttd->td_cpuset);
2164 case CPU_WHICH_CPUSET:
2165 case CPU_WHICH_JAIL:
2168 case CPU_WHICH_INTRHANDLER:
2169 case CPU_WHICH_ITHREAD:
2170 case CPU_WHICH_DOMAIN:
2174 if (level == CPU_LEVEL_ROOT)
2175 nset = cpuset_refroot(set);
2177 nset = cpuset_refbase(set);
2178 error = cpuset_modify_domain(nset, &domain);
2182 case CPU_LEVEL_WHICH:
2185 error = _cpuset_setthread(id, NULL, &domain);
2188 error = cpuset_setproc(id, NULL, NULL, &domain);
2190 case CPU_WHICH_CPUSET:
2191 case CPU_WHICH_JAIL:
2192 error = cpuset_which(which, id, &p, &ttd, &set);
2194 error = cpuset_modify_domain(set, &domain);
2199 case CPU_WHICH_INTRHANDLER:
2200 case CPU_WHICH_ITHREAD:
2218 ddb_display_bitset(const struct bitset *set, int size)
2222 for (once = 0, bit = 0; bit < size; bit++) {
2223 if (CPU_ISSET(bit, set)) {
2225 db_printf("%d", bit);
2228 db_printf(",%d", bit);
2232 db_printf("<none>");
2236 ddb_display_cpuset(const cpuset_t *set)
2238 ddb_display_bitset((const struct bitset *)set, CPU_SETSIZE);
2242 ddb_display_domainset(const domainset_t *set)
2244 ddb_display_bitset((const struct bitset *)set, DOMAINSET_SETSIZE);
2247 DB_SHOW_COMMAND(cpusets, db_show_cpusets)
2251 LIST_FOREACH(set, &cpuset_ids, cs_link) {
2252 db_printf("set=%p id=%-6u ref=%-6d flags=0x%04x parent id=%d\n",
2253 set, set->cs_id, set->cs_ref, set->cs_flags,
2254 (set->cs_parent != NULL) ? set->cs_parent->cs_id : 0);
2255 db_printf(" cpu mask=");
2256 ddb_display_cpuset(&set->cs_mask);
2258 db_printf(" domain policy %d prefer %d mask=",
2259 set->cs_domain->ds_policy, set->cs_domain->ds_prefer);
2260 ddb_display_domainset(&set->cs_domain->ds_mask);
2267 DB_SHOW_COMMAND(domainsets, db_show_domainsets)
2269 struct domainset *set;
2271 LIST_FOREACH(set, &cpuset_domains, ds_link) {
2272 db_printf("set=%p policy %d prefer %d cnt %d\n",
2273 set, set->ds_policy, set->ds_prefer, set->ds_cnt);
2274 db_printf(" mask =");
2275 ddb_display_domainset(&set->ds_mask);