sys/sys/usched.h

   1 /*
   2  * SYS/USCHED.H
   3  *
   4  *      Userland scheduler API
   5  */
   6
   7 #ifndef _SYS_USCHED_H_
   8 #define _SYS_USCHED_H_
   9
  10 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  11
  12 #ifndef _SYS_TYPES_H_
  13 #include <sys/types.h>
  14 #endif
  15 #ifndef _SYS_CPUMASK_H_
  16 #include <sys/cpumask.h>
  17 #endif
  18 #ifndef _SYS_QUEUE_H_
  19 #include <sys/queue.h>
  20 #endif
  21 #ifndef _SYS_SYSTIMER_H_
  22 #include <sys/systimer.h>
  23 #endif
  24
  25 #define NAME_LENGTH 32
  26
  27 struct lwp;
  28 struct proc;
  29 struct globaldata;
  30
  31 struct usched {
  32     TAILQ_ENTRY(usched) entry;
  33     const char *name;
  34     const char *desc;
  35     void (*usched_register)(void);
  36     void (*usched_unregister)(void);
  37     void (*acquire_curproc)(struct lwp *);
  38     void (*release_curproc)(struct lwp *);
  39     void (*setrunqueue)(struct lwp *);
  40     void (*schedulerclock)(struct lwp *, sysclock_t, sysclock_t);
  41     void (*recalculate)(struct lwp *);
  42     void (*resetpriority)(struct lwp *);
  43     void (*heuristic_forking)(struct lwp *, struct lwp *);
  44     void (*heuristic_exiting)(struct lwp *, struct proc *);
  45     void (*uload_update)(struct lwp *);
  46     void (*setcpumask)(struct usched *, cpumask_t);
  47     void (*yield)(struct lwp *);
  48     void (*changedcpu)(struct lwp *);
  49 };
  50
  51 union usched_data {
  52     /*
  53      * BSD4 scheduler.
  54      */
  55     struct {
  56         short   priority;       /* lower is better */
  57         char    unused01;       /* (currently not used) */
  58         char    rqindex;
  59         int     batch;          /* batch mode heuristic */
  60         int     estcpu;         /* dynamic priority modification */
  61         u_short rqtype;         /* protected copy of rtprio type */
  62         u_short unused02;
  63     } bsd4;
  64     struct {
  65         short   priority;       /* lower is better */
  66         char    forked;         /* lock cpu during fork */
  67         char    rqindex;
  68         short   estfast;        /* fast estcpu collapse mode */
  69         short   uload;          /* for delta uload adjustments */
  70         int     estcpu;         /* dynamic priority modification */
  71         u_short rqtype;         /* protected copy of rtprio type */
  72         u_short qcpu;           /* which cpu are we enqueued on? */
  73         u_short rrcount;        /* reset when moved to runq tail */
  74         u_short unused01;
  75         u_short unused02;
  76         u_short unused03;
  77     } dfly;
  78
  79     int         pad[6];         /* PAD for future expansion */
  80 };
  81
  82 /*
  83  * Flags for usched_ctl()
  84  */
  85 #define        USCH_ADD        0x00000001
  86 #define        USCH_REM        0x00000010
  87
  88 #endif  /* _KERNEL || _KERNEL_STRUCTURES */
  89
  90 #define USCHED_SET_SCHEDULER    0
  91 #define USCHED_SET_CPU          1
  92 #define USCHED_ADD_CPU          2
  93 #define USCHED_DEL_CPU          3
  94 #define USCHED_GET_CPU          4
  95 #define USCHED_GET_CPUMASK      5       /* since DragonFly 4.5 */
  96 #define USCHED_SET_CPUMASK      6       /* since DragonFly 4.7 */
  97
  98 /*
  99  * Kernel variables and procedures, or user system calls.
 100  */
 101 #ifdef _KERNEL
 102
 103 extern struct usched    usched_bsd4;
 104 extern struct usched    usched_dfly;
 105 extern struct usched    usched_dummy;
 106 void dfly_acquire_curproc(struct lwp *);
 107 extern cpumask_t usched_mastermask;
 108 extern int sched_ticks; /* From sys/kern/kern_clock.c */
 109
 110 int usched_ctl(struct usched *, int);
 111 struct usched *usched_init(void);
 112 void usched_schedulerclock(struct lwp *, sysclock_t, sysclock_t);
 113
 114 #endif
 115
 116 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL)
 117
 118 int usched_set(pid_t, int, void *, int);
 119
 120 #endif
 121
 122 #endif
 123