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sched: cfs rq data types 

add the CFS rq data types to sched.c.

(the old scheduler fields are still intact, they are removed
 by a later patch)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2007-07-09 18:51:58 +02:00
parent 20b8a59f24
commit 6aa645ea5f
1 changed files with 78 additions and 6 deletions
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84
kernel/sched.c
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@ -91,6 +91,9 @@ unsigned long long __attribute__((weak)) sched_clock(void)
#define NS_TO_JIFFIES(TIME) ((TIME) / (1000000000 / HZ))
#define JIFFIES_TO_NS(TIME) ((TIME) * (1000000000 / HZ))
#define NICE_0_LOAD SCHED_LOAD_SCALE
#define NICE_0_SHIFT SCHED_LOAD_SHIFT
/*
* These are the 'tuning knobs' of the scheduler:
*
@ -218,9 +221,61 @@ static inline unsigned int task_timeslice(struct task_struct *p)
}
/*
* These are the runqueue data structures:
* This is the priority-queue data structure of the RT scheduling class:
*/
struct rt_prio_array {
DECLARE_BITMAP(bitmap, MAX_RT_PRIO+1); /* include 1 bit for delimiter */
struct list_head queue[MAX_RT_PRIO];
};
struct load_stat {
struct load_weight load;
u64 load_update_start, load_update_last;
unsigned long delta_fair, delta_exec, delta_stat;
};
/* CFS-related fields in a runqueue */
struct cfs_rq {
struct load_weight load;
unsigned long nr_running;
s64 fair_clock;
u64 exec_clock;
s64 wait_runtime;
u64 sleeper_bonus;
unsigned long wait_runtime_overruns, wait_runtime_underruns;
struct rb_root tasks_timeline;
struct rb_node *rb_leftmost;
struct rb_node *rb_load_balance_curr;
#ifdef CONFIG_FAIR_GROUP_SCHED
/* 'curr' points to currently running entity on this cfs_rq.
* It is set to NULL otherwise (i.e when none are currently running).
*/
struct sched_entity *curr;
struct rq *rq; /* cpu runqueue to which this cfs_rq is attached */
/* leaf cfs_rqs are those that hold tasks (lowest schedulable entity in
* a hierarchy). Non-leaf lrqs hold other higher schedulable entities
* (like users, containers etc.)
*
* leaf_cfs_rq_list ties together list of leaf cfs_rq's in a cpu. This
* list is used during load balance.
*/
struct list_head leaf_cfs_rq_list; /* Better name : task_cfs_rq_list? */
#endif
};
/* Real-Time classes' related field in a runqueue: */
struct rt_rq {
struct rt_prio_array active;
int rt_load_balance_idx;
struct list_head *rt_load_balance_head, *rt_load_balance_curr;
};
/*
* The prio-array type of the old scheduler:
*/
struct prio_array {
unsigned int nr_active;
DECLARE_BITMAP(bitmap, MAX_PRIO+1); /* include 1 bit for delimiter */
@ -235,7 +290,7 @@ struct prio_array {
* acquire operations must be ordered by ascending &runqueue.
*/
struct rq {
spinlock_t lock;
spinlock_t lock; /* runqueue lock */
/*
* nr_running and cpu_load should be in the same cacheline because
@ -243,14 +298,21 @@ struct rq {
*/
unsigned long nr_running;
unsigned long raw_weighted_load;
#ifdef CONFIG_SMP
unsigned long cpu_load[3];
#define CPU_LOAD_IDX_MAX 5
unsigned long cpu_load[CPU_LOAD_IDX_MAX];
unsigned char idle_at_tick;
#ifdef CONFIG_NO_HZ
unsigned char in_nohz_recently;
#endif
struct load_stat ls; /* capture load from *all* tasks on this cpu */
unsigned long nr_load_updates;
u64 nr_switches;
struct cfs_rq cfs;
#ifdef CONFIG_FAIR_GROUP_SCHED
struct list_head leaf_cfs_rq_list; /* list of leaf cfs_rq on this cpu */
#endif
unsigned long long nr_switches;
struct rt_rq rt;
/*
* This is part of a global counter where only the total sum
@ -261,13 +323,23 @@ struct rq {
unsigned long nr_uninterruptible;
unsigned long expired_timestamp;
/* Cached timestamp set by update_cpu_clock() */
unsigned long long most_recent_timestamp;
struct task_struct *curr, *idle;
unsigned long next_balance;
struct mm_struct *prev_mm;
struct prio_array *active, *expired, arrays[2];
int best_expired_prio;
u64 clock, prev_clock_raw;
s64 clock_max_delta;
unsigned int clock_warps, clock_overflows;
unsigned int clock_unstable_events;
struct sched_class *load_balance_class;
atomic_t nr_iowait;
#ifdef CONFIG_SMP