xnu-344.tar.gz

[apple/xnu.git] / osfmk / kern / sched.h

diff --git a/osfmk/kern/sched.h b/osfmk/kern/sched.h
index 01f2d3ada72c24b39db1d6c53bcf4c1467581d93..62c06f5ed89bf992243f6ecc40f6247b5d8339c4 100644 (file)
--- a/osfmk/kern/sched.h
+++ b/osfmk/kern/sched.h
@@ -70,6 +70,7 @@
 #include <kern/lock.h>
 #include <kern/macro_help.h>
 #include <kern/timer_call.h>
+#include <kern/ast.h>
 
 #if    STAT_TIME
 
@@ -87,8 +88,8 @@
 
 #endif /* STAT_TIME */
 
-#define        NRQS            128                             /* 128 run queues per cpu */
-#define NRQBM          (NRQS / 32)             /* number of run queue bit maps */
+#define        NRQS            128                             /* 128 levels per run queue */
+#define NRQBM          (NRQS / 32)             /* number of words per bit map */
 
 #define MAXPRI         (NRQS-1)
 #define MINPRI         IDLEPRI                 /* lowest legal priority schedulable */
@@ -164,6 +165,9 @@
 #define MINPRI_SYSTEM          (MAXPRI_SYSTEM - (NRQS / 8) + 1)        /* 64 */
 
 #define MAXPRI_USER                    (MINPRI_SYSTEM - 1)                                     /* 63 */
+#define BASEPRI_CONTROL                (BASEPRI_DEFAULT + 17)                          /* 48 */
+#define BASEPRI_FOREGROUND     (BASEPRI_DEFAULT + 16)                          /* 47 */
+#define BASEPRI_BACKGROUND     (BASEPRI_DEFAULT + 15)                          /* 46 */
 #define BASEPRI_DEFAULT                (MAXPRI_USER - (NRQS / 4))                      /* 31 */
 #define MINPRI_USER                    MINPRI                                                          /*  0 */
 
@@ -179,7 +183,8 @@ struct run_queue {
        decl_simple_lock_data(,lock)                    /* one lock for all queues */
        int                                     bitmap[NRQBM];          /* run queue bitmap array */
        int                                     highq;                          /* highest runnable queue */
-       int                                     count;                          /* # of runnable threads */
+       int                                     urgency;                        /* level of preemption urgency */
+       int                                     count;                          /* # of threads in queue */
 };
 
 typedef struct run_queue       *run_queue_t;
@@ -187,6 +192,7 @@ typedef struct run_queue    *run_queue_t;
 
 #define first_quantum(processor)       ((processor)->slice_quanta > 0)
 
+/* Invoked at splsched by a thread on itself */
 #define csw_needed(thread, processor) (                                                                                \
        ((thread)->state & TH_SUSP)                                                                             ||              \
        (first_quantum(processor)?                                                                                              \
@@ -211,6 +217,11 @@ extern void                thread_quantum_expire(
                                        timer_call_param_t      processor,
                                        timer_call_param_t      thread);
 
+/* Called at splsched by a thread on itself */
+extern ast_t   csw_check(
+                                       thread_t                thread,
+                                       processor_t             processor);
+
 extern uint32_t        std_quantum, min_std_quantum;
 extern uint32_t        std_quantum_us;
 
@@ -242,10 +253,9 @@ extern unsigned    sched_tick;
 /*
  *     thread_timer_delta macro takes care of both thread timers.
  */
-
 #define thread_timer_delta(thread)                                             \
 MACRO_BEGIN                                                                                                    \
-       register unsigned       delta;                                                          \
+       register uint32_t       delta;                                                          \
                                                                                                                        \
        delta = 0;                                                                                              \
        TIMER_DELTA((thread)->system_timer,                                             \