Infrastructure for plugsched

PATCH In review Con Kolivas 1 participant 1 message Oct 30, 2004 Scheduler

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Con Kolivas

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2004-10-30 14:36 UTC #0 lore raw

PATCH 1/28 Infrastructure for plugsched

Infrastructure for plugsched

To create the architecture for private per-cpu-scheduler functions we create kernel/scheduler.c which is to contain functions common to all schedulers.

We add include/linux/scheduler.h as a common point to enter all per scheduler information. In that we create the global sched_drv struct which will contain the pointers to each private scheduler equivalent of the common functions.

The current kernel/sched.c will be the unique file for "ingosched" or the default scheduler. I apologise that I couldn't think up a different name for it after I nicknamed it :P

Signed-off-by Con Kolivas <[email protected]>

include/linux/sched.h +3 -1

Index: linux-2.6.10-rc1-mm2-plugsched1/include/linux/sched.h
===================================================================
@@ -463,12 +463,12 @@ struct sched_domain {
 #endif
 };
 
+extern void cpu_attach_domain(struct sched_domain *sd, int cpu);
 #ifdef ARCH_HAS_SCHED_DOMAIN
 /* Useful helpers that arch setup code may use. Defined in kernel/sched.c */
 extern cpumask_t cpu_isolated_map;
 extern void init_sched_build_groups(struct sched_group groups[],
 	                        cpumask_t span, int (*group_fn)(int cpu));
-extern void cpu_attach_domain(struct sched_domain *sd, int cpu);
 #endif /* ARCH_HAS_SCHED_DOMAIN */
 #endif /* CONFIG_SMP */

@@ -513,6 +513,8 @@ int set_current_groups(struct group_info
 struct audit_context;		/* See audit.c */
 struct mempolicy;
 
+#include <linux/scheduler.h>
+
 struct task_struct {
 	volatile long state;	/* -1 unrunnable, 0 runnable, >0 stopped */
 	struct thread_info *thread_info;

include/linux/scheduler.h +34 -0

Index: linux-2.6.10-rc1-mm2-plugsched1/include/linux/scheduler.h
===================================================================
@@ -0,0 +1,34 @@
+struct sched_drv
+{
+	void (*sched_idle_next)(void);
+	void (*set_oom_timeslice)(task_t *);
+	unsigned long (*nr_running)(void);
+	unsigned long (*nr_uninterruptible)(void);
+	unsigned long long (*nr_context_switches)(void);
+	unsigned long (*nr_iowait)(void);
+	int (*idle_cpu)(int);
+	void (*init_idle)(task_t *, int);
+	void (*exit)(task_t *);
+	void (*fork)(task_t *);
+	void (*init)(void);
+	void (*init_smp)(void);
+	void (*schedule)(void);
+	void (*tick)(void);
+	void (*tail)(task_t *);
+	int (*setscheduler)(pid_t, int, struct sched_param __user *);
+	void (*set_user_nice)(task_t *, long);
+	long (*rr_get_interval)(pid_t, struct timespec __user *);
+	long (*yield)(void);
+	int (*task_curr)(const task_t *);
+	int (*task_nice)(const task_t *);
+	int (*task_prio)(const task_t *);
+	int (*try_to_wake_up)(task_t *, unsigned, int);
+	void (*wake_up_new_task)(task_t *, unsigned long);
+#ifdef CONFIG_SMP
+	int (*migration_init)(void);
+	void (*exec)(void);
+	int (*set_cpus_allowed)(task_t *, cpumask_t);
+	void (*wait_task_inactive)(task_t *);
+	void (*cpu_attach_domain)(struct sched_domain *, int);
+#endif
+};

kernel/scheduler.c +197 -0

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