154 lines
5.6 KiB
C
154 lines
5.6 KiB
C
/*-
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* Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org>
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* All rights reserved.
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*
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* Copyright (c) 2008 Nokia Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_CPUSET_H_
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#define _SYS_CPUSET_H_
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#include <sys/_cpuset.h>
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#include <sys/bitset.h>
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#define _NCPUBITS _BITSET_BITS
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#define _NCPUWORDS __bitset_words(CPU_SETSIZE)
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#define CPUSETBUFSIZ ((2 + sizeof(long) * 2) * _NCPUWORDS)
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#define CPU_CLR(n, p) BIT_CLR(CPU_SETSIZE, n, p)
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#define CPU_COPY(f, t) BIT_COPY(CPU_SETSIZE, f, t)
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#define CPU_ISSET(n, p) BIT_ISSET(CPU_SETSIZE, n, p)
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#define CPU_SET(n, p) BIT_SET(CPU_SETSIZE, n, p)
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#define CPU_ZERO(p) BIT_ZERO(CPU_SETSIZE, p)
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#define CPU_FILL(p) BIT_FILL(CPU_SETSIZE, p)
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#define CPU_SETOF(n, p) BIT_SETOF(CPU_SETSIZE, n, p)
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#define CPU_EMPTY(p) BIT_EMPTY(CPU_SETSIZE, p)
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#define CPU_ISFULLSET(p) BIT_ISFULLSET(CPU_SETSIZE, p)
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#define CPU_SUBSET(p, c) BIT_SUBSET(CPU_SETSIZE, p, c)
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#define CPU_OVERLAP(p, c) BIT_OVERLAP(CPU_SETSIZE, p, c)
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#define CPU_CMP(p, c) BIT_CMP(CPU_SETSIZE, p, c)
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#define CPU_OR(d, s) BIT_OR(CPU_SETSIZE, d, s)
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#define CPU_AND(d, s) BIT_AND(CPU_SETSIZE, d, s)
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#define CPU_NAND(d, s) BIT_NAND(CPU_SETSIZE, d, s)
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#define CPU_CLR_ATOMIC(n, p) BIT_CLR_ATOMIC(CPU_SETSIZE, n, p)
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#define CPU_SET_ATOMIC(n, p) BIT_SET_ATOMIC(CPU_SETSIZE, n, p)
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#define CPU_SET_ATOMIC_ACQ(n, p) BIT_SET_ATOMIC_ACQ(CPU_SETSIZE, n, p)
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#define CPU_AND_ATOMIC(n, p) BIT_AND_ATOMIC(CPU_SETSIZE, n, p)
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#define CPU_OR_ATOMIC(d, s) BIT_OR_ATOMIC(CPU_SETSIZE, d, s)
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#define CPU_COPY_STORE_REL(f, t) BIT_COPY_STORE_REL(CPU_SETSIZE, f, t)
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#define CPU_FFS(p) BIT_FFS(CPU_SETSIZE, p)
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#define CPU_COUNT(p) BIT_COUNT(CPU_SETSIZE, p)
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#define CPUSET_FSET BITSET_FSET(_NCPUWORDS)
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#define CPUSET_T_INITIALIZER BITSET_T_INITIALIZER
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/*
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* Valid cpulevel_t values.
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*/
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#define CPU_LEVEL_ROOT 1 /* All system cpus. */
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#define CPU_LEVEL_CPUSET 2 /* Available cpus for which. */
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#define CPU_LEVEL_WHICH 3 /* Actual mask/id for which. */
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/*
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* Valid cpuwhich_t values.
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*/
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#define CPU_WHICH_TID 1 /* Specifies a thread id. */
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#define CPU_WHICH_PID 2 /* Specifies a process id. */
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#define CPU_WHICH_CPUSET 3 /* Specifies a set id. */
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#define CPU_WHICH_IRQ 4 /* Specifies an irq #. */
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#define CPU_WHICH_JAIL 5 /* Specifies a jail id. */
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#define CPU_WHICH_DOMAIN 6 /* Specifies a NUMA domain id. */
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/*
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* Reserved cpuset identifiers.
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*/
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#define CPUSET_INVALID -1
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#define CPUSET_DEFAULT 0
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#ifdef _KERNEL
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#include <sys/queue.h>
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LIST_HEAD(setlist, cpuset);
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/*
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* cpusets encapsulate cpu binding information for one or more threads.
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*
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* a - Accessed with atomics.
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* s - Set at creation, never modified. Only a ref required to read.
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* c - Locked internally by a cpuset lock.
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*
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* The bitmask is only modified while holding the cpuset lock. It may be
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* read while only a reference is held but the consumer must be prepared
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* to deal with inconsistent results.
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*/
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struct cpuset {
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cpuset_t cs_mask; /* bitmask of valid cpus. */
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volatile u_int cs_ref; /* (a) Reference count. */
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int cs_flags; /* (s) Flags from below. */
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cpusetid_t cs_id; /* (s) Id or INVALID. */
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struct cpuset *cs_parent; /* (s) Pointer to our parent. */
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LIST_ENTRY(cpuset) cs_link; /* (c) All identified sets. */
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LIST_ENTRY(cpuset) cs_siblings; /* (c) Sibling set link. */
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struct setlist cs_children; /* (c) List of children. */
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};
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#define CPU_SET_ROOT 0x0001 /* Set is a root set. */
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#define CPU_SET_RDONLY 0x0002 /* No modification allowed. */
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extern cpuset_t *cpuset_root;
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struct prison;
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struct proc;
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struct thread;
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struct cpuset *cpuset_thread0(void);
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struct cpuset *cpuset_ref(struct cpuset *);
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void cpuset_rel(struct cpuset *);
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int cpuset_setthread(lwpid_t id, cpuset_t *);
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int cpuset_setithread(lwpid_t id, int cpu);
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int cpuset_create_root(struct prison *, struct cpuset **);
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int cpuset_setproc_update_set(struct proc *, struct cpuset *);
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int cpuset_which(cpuwhich_t, id_t, struct proc **,
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struct thread **, struct cpuset **);
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char *cpusetobj_strprint(char *, const cpuset_t *);
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int cpusetobj_strscan(cpuset_t *, const char *);
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#ifdef DDB
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void ddb_display_cpuset(const cpuset_t *);
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#endif
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#else
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__BEGIN_DECLS
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int cpuset(cpusetid_t *);
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int cpuset_setid(cpuwhich_t, id_t, cpusetid_t);
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int cpuset_getid(cpulevel_t, cpuwhich_t, id_t, cpusetid_t *);
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int cpuset_getaffinity(cpulevel_t, cpuwhich_t, id_t, size_t, cpuset_t *);
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int cpuset_setaffinity(cpulevel_t, cpuwhich_t, id_t, size_t, const cpuset_t *);
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__END_DECLS
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#endif
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#endif /* !_SYS_CPUSET_H_ */
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