FreeBSD/Linux Kernel Cross Reference
sys/cddl/contrib/opensolaris/uts/common/sys/cpupart.h

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License (the "License").
      * You may not use this file except in compliance with the License.
      *
      * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      * or http://www.opensolaris.org/os/licensing.
     * See the License for the specific language governing permissions
     * and limitations under the License.
     *
     * When distributing Covered Code, include this CDDL HEADER in each
     * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     * If applicable, add the following below this CDDL HEADER, with the
     * fields enclosed by brackets "[]" replaced with your own identifying
     * information: Portions Copyright [yyyy] [name of copyright owner]
     *
     * CDDL HEADER END
     */
    /*
     * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved.
     * Copyright 2017 RackTop Systems.
     */
    
    #ifndef _SYS_CPUPART_H
    #define _SYS_CPUPART_H
    
    #include <sys/types.h>
    #include <sys/processor.h>
    #include <sys/cpuvar.h>
    #include <sys/disp.h>
    #include <sys/pset.h>
    #include <sys/lgrp.h>
    #include <sys/lgrp_user.h>
    #include <sys/pg.h>
    #include <sys/bitset.h>
    #include <sys/time.h>
    
    #ifdef  __cplusplus
    extern "C" {
    #endif
    
    #if defined(_KERNEL) || defined(_FAKE_KERNEL)
    
    typedef int     cpupartid_t;
    
    /*
     * Special partition id.
     */
    #define CP_DEFAULT      0
    
    /*
     * Flags for cpupart_list()
     */
    #define CP_ALL          0               /* return all cpu partitions */
    #define CP_NONEMPTY     1               /* return only non-empty ones */
    
    typedef struct cpupart {
            disp_t          cp_kp_queue;    /* partition-wide kpreempt queue */
            cpupartid_t     cp_id;          /* partition ID */
            int             cp_ncpus;       /* number of online processors */
            struct cpupart  *cp_next;       /* next partition in list */
            struct cpupart  *cp_prev;       /* previous partition in list */
            struct cpu      *cp_cpulist;    /* processor list */
            struct kstat    *cp_kstat;      /* per-partition statistics */
    
            /*
             * cp_nrunnable and cp_nrunning are used to calculate load average.
             */
            uint_t          cp_nrunnable;   /* current # of runnable threads */
            uint_t          cp_nrunning;    /* current # of running threads */
    
            /*
             * cp_updates, cp_nrunnable_cum, cp_nwaiting_cum, and cp_hp_avenrun
             * are used to generate kstat information on an as-needed basis.
             */
            uint64_t        cp_updates;     /* number of statistics updates */
            uint64_t        cp_nrunnable_cum; /* cum. # of runnable threads */
            uint64_t        cp_nwaiting_cum;  /* cum. # of waiting threads */
    
            struct loadavg_s cp_loadavg;    /* cpupart loadavg */
    
            klgrpset_t      cp_lgrpset;     /* set of lgroups on which this */
                                            /*    partition has cpus */
            lpl_t           *cp_lgrploads;  /* table of load averages for this  */
                                            /*    partition, indexed by lgrp ID */
            int             cp_nlgrploads;  /* size of cp_lgrploads table */
            uint64_t        cp_hp_avenrun[3]; /* high-precision load average */
            uint_t          cp_attr;        /* bitmask of attributes */
            lgrp_gen_t      cp_gen;         /* generation number */
            lgrp_id_t       cp_lgrp_hint;   /* last home lgroup chosen */
            bitset_t        cp_cmt_pgs;     /* CMT PGs represented */
            bitset_t        cp_haltset;     /* halted CPUs */
    } cpupart_t;
    
    typedef struct cpupart_kstat {
            kstat_named_t   cpk_updates;            /* number of updates */
            kstat_named_t   cpk_runnable;           /* cum # of runnable threads */
           kstat_named_t   cpk_waiting;            /* cum # waiting for I/O */
           kstat_named_t   cpk_ncpus;              /* current # of CPUs */
           kstat_named_t   cpk_avenrun_1min;       /* 1-minute load average */
           kstat_named_t   cpk_avenrun_5min;       /* 5-minute load average */
           kstat_named_t   cpk_avenrun_15min;      /* 15-minute load average */
   } cpupart_kstat_t;
   
   /*
    * Macro to obtain the maximum run priority for the global queue associated
    * with given cpu partition.
    */
   #define CP_MAXRUNPRI(cp)        ((cp)->cp_kp_queue.disp_maxrunpri)
   
   /*
    * This macro is used to determine if the given thread must surrender
    * CPU to higher priority runnable threads on one of its dispatch queues.
    * This should really be defined in <sys/disp.h> but it is not because
    * including <sys/cpupart.h> there would cause recursive includes.
    */
   #define DISP_MUST_SURRENDER(t)                          \
           ((DISP_MAXRUNPRI(t) > DISP_PRIO(t)) ||          \
           (CP_MAXRUNPRI(t->t_cpupart) > DISP_PRIO(t)))
   
   extern cpupart_t        cp_default;
   extern cpupart_t        *cp_list_head;
   extern uint_t           cp_numparts;
   extern uint_t           cp_numparts_nonempty;
   
   /*
    * Each partition contains a bitset that indicates which CPUs are halted and
    * which ones are running. Given the growing number of CPUs in current and
    * future platforms, it's important to fanout each CPU within its partition's
    * haltset to prevent contention due to false sharing. The fanout factor
    * is platform specific, and declared accordingly.
    */
   extern uint_t cp_haltset_fanout;
   
   extern void     cpupart_initialize_default();
   extern cpupart_t *cpupart_find(psetid_t);
   extern int      cpupart_create(psetid_t *);
   extern int      cpupart_destroy(psetid_t);
   extern psetid_t cpupart_query_cpu(cpu_t *);
   extern int      cpupart_attach_cpu(psetid_t, cpu_t *, int);
   extern int      cpupart_get_cpus(psetid_t *, processorid_t *, uint_t *);
   extern int      cpupart_bind_thread(kthread_id_t, psetid_t, int, void *,
       void *);
   extern void     cpupart_kpqalloc(pri_t);
   extern int      cpupart_get_loadavg(psetid_t, int *, int);
   extern uint_t   cpupart_list(psetid_t *, uint_t, int);
   extern int      cpupart_setattr(psetid_t, uint_t);
   extern int      cpupart_getattr(psetid_t, uint_t *);
   
   #endif  /* _KERNEL || _FAKE_KERNEL */
   
   #ifdef  __cplusplus
   }
   #endif
   
   #endif  /* _SYS_CPUPART_H */

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