| /*- |
| * Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org> |
| * 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 _BSD_SYS_CPUSET_H_ |
| #define _BSD_SYS_CPUSET_H_ |
| |
| #ifdef _FREEBSD_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 _FREEBSD_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 /* !_BSD_SYS_CPUSET_H_ */ |