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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #ifndef	_SYS_CPUPART_H
     27 #define	_SYS_CPUPART_H
     28 
     29 #include <sys/types.h>
     30 #include <sys/processor.h>
     31 #include <sys/cpuvar.h>
     32 #include <sys/disp.h>
     33 #include <sys/pset.h>
     34 #include <sys/lgrp.h>
     35 #include <sys/lgrp_user.h>
     36 #include <sys/pg.h>
     37 #include <sys/bitset.h>
     38 #include <sys/time.h>
     39 
     40 #ifdef	__cplusplus
     41 extern "C" {
     42 #endif
     43 
     44 #ifdef _KERNEL
     45 
     46 typedef int	cpupartid_t;
     47 
     48 /*
     49  * Special partition id.
     50  */
     51 #define	CP_DEFAULT	0
     52 
     53 /*
     54  * Flags for cpupart_list()
     55  */
     56 #define	CP_ALL		0		/* return all cpu partitions */
     57 #define	CP_NONEMPTY	1		/* return only non-empty ones */
     58 
     59 typedef struct cpupart {
     60 	disp_t		cp_kp_queue;	/* partition-wide kpreempt queue */
     61 	cpupartid_t	cp_id;		/* partition ID */
     62 	int		cp_ncpus;	/* number of online processors */
     63 	struct cpupart	*cp_next;	/* next partition in list */
     64 	struct cpupart	*cp_prev;	/* previous partition in list */
     65 	struct cpu	*cp_cpulist;	/* processor list */
     66 	struct kstat	*cp_kstat;	/* per-partition statistics */
     67 
     68 	/*
     69 	 * cp_nrunnable and cp_nrunning are used to calculate load average.
     70 	 */
     71 	uint_t		cp_nrunnable;	/* current # of runnable threads */
     72 	uint_t		cp_nrunning;	/* current # of running threads */
     73 
     74 	/*
     75 	 * cp_updates, cp_nrunnable_cum, cp_nwaiting_cum, and cp_hp_avenrun
     76 	 * are used to generate kstat information on an as-needed basis.
     77 	 */
     78 	uint64_t	cp_updates;	/* number of statistics updates */
     79 	uint64_t	cp_nrunnable_cum; /* cum. # of runnable threads */
     80 	uint64_t	cp_nwaiting_cum;  /* cum. # of waiting threads */
     81 
     82 	struct loadavg_s cp_loadavg;	/* cpupart loadavg */
     83 
     84 	klgrpset_t	cp_lgrpset;	/* set of lgroups on which this */
     85 					/*    partition has cpus */
     86 	lpl_t		*cp_lgrploads;	/* table of load averages for this  */
     87 					/*    partition, indexed by lgrp ID */
     88 	int		cp_nlgrploads;	/* size of cp_lgrploads table */
     89 	uint64_t	cp_hp_avenrun[3]; /* high-precision load average */
     90 	uint_t		cp_attr;	/* bitmask of attributes */
     91 	lgrp_gen_t	cp_gen;		/* generation number */
     92 	lgrp_id_t	cp_lgrp_hint;	/* last home lgroup chosen */
     93 	bitset_t	cp_cmt_pgs;	/* CMT PGs represented */
     94 	bitset_t	cp_haltset;	/* halted CPUs */
     95 } cpupart_t;
     96 
     97 typedef struct cpupart_kstat {
     98 	kstat_named_t	cpk_updates;		/* number of updates */
     99 	kstat_named_t	cpk_runnable;		/* cum # of runnable threads */
    100 	kstat_named_t	cpk_waiting;		/* cum # waiting for I/O */
    101 	kstat_named_t	cpk_ncpus;		/* current # of CPUs */
    102 	kstat_named_t	cpk_avenrun_1min;	/* 1-minute load average */
    103 	kstat_named_t	cpk_avenrun_5min;	/* 5-minute load average */
    104 	kstat_named_t	cpk_avenrun_15min;	/* 15-minute load average */
    105 } cpupart_kstat_t;
    106 
    107 /*
    108  * Macro to obtain the maximum run priority for the global queue associated
    109  * with given cpu partition.
    110  */
    111 #define	CP_MAXRUNPRI(cp)	((cp)->cp_kp_queue.disp_maxrunpri)
    112 
    113 /*
    114  * This macro is used to determine if the given thread must surrender
    115  * CPU to higher priority runnable threads on one of its dispatch queues.
    116  * This should really be defined in <sys/disp.h> but it is not because
    117  * including <sys/cpupart.h> there would cause recursive includes.
    118  */
    119 #define	DISP_MUST_SURRENDER(t)				\
    120 	((DISP_MAXRUNPRI(t) > DISP_PRIO(t)) ||		\
    121 	(CP_MAXRUNPRI(t->t_cpupart) > DISP_PRIO(t)))
    122 
    123 extern cpupart_t	cp_default;
    124 extern cpupart_t	*cp_list_head;
    125 extern uint_t		cp_numparts;
    126 extern uint_t		cp_numparts_nonempty;
    127 
    128 extern void	cpupart_initialize_default();
    129 extern cpupart_t *cpupart_find(psetid_t);
    130 extern int	cpupart_create(psetid_t *);
    131 extern int	cpupart_destroy(psetid_t);
    132 extern psetid_t	cpupart_query_cpu(cpu_t *);
    133 extern int	cpupart_attach_cpu(psetid_t, cpu_t *, int);
    134 extern int	cpupart_get_cpus(psetid_t *, processorid_t *, uint_t *);
    135 extern int	cpupart_bind_thread(kthread_id_t, psetid_t, int, void *,
    136     void *);
    137 extern void	cpupart_kpqalloc(pri_t);
    138 extern int	cpupart_get_loadavg(psetid_t, int *, int);
    139 extern uint_t	cpupart_list(psetid_t *, uint_t, int);
    140 extern int	cpupart_setattr(psetid_t, uint_t);
    141 extern int	cpupart_getattr(psetid_t, uint_t *);
    142 
    143 #endif	/* _KERNEL */
    144 
    145 #ifdef	__cplusplus
    146 }
    147 #endif
    148 
    149 #endif	/* _SYS_CPUPART_H */
    150