/*- * Copyright (c) 2008, Jeffrey Roberson * All rights reserved. * * Copyright (c) 2008 Nokia Corporation * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _SYS_CPUSET_H_ #define _SYS_CPUSET_H_ #ifdef _KERNEL #define CPU_SETSIZE MAXCPU #endif #define CPU_MAXSIZE 128 #ifndef CPU_SETSIZE #define CPU_SETSIZE CPU_MAXSIZE #endif #define _NCPUBITS (sizeof(long) * NBBY) /* bits per mask */ #define _NCPUWORDS howmany(CPU_SETSIZE, _NCPUBITS) typedef struct _cpuset { long __bits[howmany(CPU_SETSIZE, _NCPUBITS)]; } cpuset_t; #define __cpuset_mask(n) ((long)1 << ((n) % _NCPUBITS)) #define CPU_CLR(n, p) ((p)->__bits[(n)/_NCPUBITS] &= ~__cpuset_mask(n)) #define CPU_COPY(f, t) (void)(*(t) = *(f)) #define CPU_ISSET(n, p) (((p)->__bits[(n)/_NCPUBITS] & __cpuset_mask(n)) != 0) #define CPU_SET(n, p) ((p)->__bits[(n)/_NCPUBITS] |= __cpuset_mask(n)) #define CPU_ZERO(p) do { \ __size_t __i; \ for (__i = 0; __i < _NCPUWORDS; __i++) \ (p)->__bits[__i] = 0; \ } while (0) #define CPU_FILL(p) do { \ __size_t __i; \ for (__i = 0; __i < _NCPUWORDS; __i++) \ (p)->__bits[__i] = -1; \ } while (0) /* Is p empty. */ #define CPU_EMPTY(p) __extension__ ({ \ __size_t __i; \ for (__i = 0; __i < _NCPUWORDS; __i++) \ if ((p)->__bits[__i]) \ break; \ __i == _NCPUWORDS; \ }) /* Is c a subset of p. */ #define CPU_SUBSET(p, c) __extension__ ({ \ __size_t __i; \ for (__i = 0; __i < _NCPUWORDS; __i++) \ if (((c)->__bits[__i] & \ (p)->__bits[__i]) != \ (c)->__bits[__i]) \ break; \ __i == _NCPUWORDS; \ }) /* Are there any common bits between b & c? */ #define CPU_OVERLAP(p, c) __extension__ ({ \ __size_t __i; \ for (__i = 0; __i < _NCPUWORDS; __i++) \ if (((c)->__bits[__i] & \ (p)->__bits[__i]) != 0) \ break; \ __i != _NCPUWORDS; \ }) /* Compare two sets, returns 0 if equal 1 otherwise. */ #define CPU_CMP(p, c) __extension__ ({ \ __size_t __i; \ for (__i = 0; __i < _NCPUWORDS; __i++) \ if (((c)->__bits[__i] != \ (p)->__bits[__i])) \ break; \ __i != _NCPUWORDS; \ }) #define CPU_OR(d, s) do { \ __size_t __i; \ for (__i = 0; __i < _NCPUWORDS; __i++) \ (d)->__bits[__i] |= (s)->__bits[__i]; \ } while (0) #define CPU_AND(d, s) do { \ __size_t __i; \ for (__i = 0; __i < _NCPUWORDS; __i++) \ (d)->__bits[__i] &= (s)->__bits[__i]; \ } while (0) #define CPU_NAND(d, s) do { \ __size_t __i; \ for (__i = 0; __i < _NCPUWORDS; __i++) \ (d)->__bits[__i] &= ~(s)->__bits[__i]; \ } while (0) /* * Valid cpulevel_t values. */ #define CPU_LEVEL_ROOT 1 /* All system cpus. */ #define CPU_LEVEL_CPUSET 2 /* Available cpus for which. */ #define CPU_LEVEL_WHICH 3 /* Actual mask/id for which. */ /* * Valid cpuwhich_t values. */ #define CPU_WHICH_TID 1 /* Specifies a thread id. */ #define CPU_WHICH_PID 2 /* Specifies a process id. */ #define CPU_WHICH_CPUSET 3 /* Specifies a set id. */ #define CPU_WHICH_IRQ 4 /* Specifies an irq #. */ #define CPU_WHICH_JAIL 5 /* Specifies a jail id. */ /* * Reserved cpuset identifiers. */ #define CPUSET_INVALID -1 #define CPUSET_DEFAULT 0 #ifdef _KERNEL LIST_HEAD(setlist, cpuset); /* * cpusets encapsulate cpu binding information for one or more threads. * * a - Accessed with atomics. * s - Set at creation, never modified. Only a ref required to read. * c - Locked internally by a cpuset lock. * * The bitmask is only modified while holding the cpuset lock. It may be * read while only a reference is held but the consumer must be prepared * to deal with inconsistent results. */ struct cpuset { cpuset_t cs_mask; /* bitmask of valid cpus. */ volatile u_int cs_ref; /* (a) Reference count. */ int cs_flags; /* (s) Flags from below. */ cpusetid_t cs_id; /* (s) Id or INVALID. */ struct cpuset *cs_parent; /* (s) Pointer to our parent. */ LIST_ENTRY(cpuset) cs_link; /* (c) All identified sets. */ LIST_ENTRY(cpuset) cs_siblings; /* (c) Sibling set link. */ struct setlist cs_children; /* (c) List of children. */ }; #define CPU_SET_ROOT 0x0001 /* Set is a root set. */ #define CPU_SET_RDONLY 0x0002 /* No modification allowed. */ extern cpuset_t *cpuset_root; struct prison; struct proc; struct cpuset *cpuset_thread0(void); struct cpuset *cpuset_ref(struct cpuset *); void cpuset_rel(struct cpuset *); int cpuset_setthread(lwpid_t id, cpuset_t *); int cpuset_create_root(struct prison *, struct cpuset **); int cpuset_setproc_update_set(struct proc *, struct cpuset *); #else __BEGIN_DECLS int cpuset(cpusetid_t *); int cpuset_setid(cpuwhich_t, id_t, cpusetid_t); int cpuset_getid(cpulevel_t, cpuwhich_t, id_t, cpusetid_t *); int cpuset_getaffinity(cpulevel_t, cpuwhich_t, id_t, size_t, cpuset_t *); int cpuset_setaffinity(cpulevel_t, cpuwhich_t, id_t, size_t, const cpuset_t *); __END_DECLS #endif #endif /* !_SYS_CPUSET_H_ */