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Commit 283e2ed3 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched/fair: Move the PELT constants into a generated header 



Now that we have a tool to generate the PELT constants in C form,
use its output as a separate header.

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent bb0bd044

kernel/sched/fair.c

+3 −18
Original line number Diff line number Diff line
@@ -717,17 +717,12 @@ static u64 sched_vslice(struct cfs_rq *cfs_rq, struct sched_entity *se) 
}



#ifdef CONFIG_SMP



#include "sched-pelt.h"



static int select_idle_sibling(struct task_struct *p, int prev_cpu, int cpu);

static unsigned long task_h_load(struct task_struct *p);



/*

 * We choose a half-life close to 1 scheduling period.

 * Note: The tables runnable_avg_yN_inv and runnable_avg_yN_sum are

 * dependent on this value.

 */

#define LOAD_AVG_PERIOD 32

#define LOAD_AVG_MAX 47742 /* maximum possible load avg */



/* Give new sched_entity start runnable values to heavy its load in infant time */

void init_entity_runnable_average(struct sched_entity *se)

{
@@ -2732,16 +2727,6 @@ static inline void update_cfs_shares(struct sched_entity *se) 
#endif /* CONFIG_FAIR_GROUP_SCHED */



#ifdef CONFIG_SMP

/* Precomputed fixed inverse multiplies for multiplication by y^n */

static const u32 runnable_avg_yN_inv[] = {

	0xffffffff, 0xfa83b2da, 0xf5257d14, 0xefe4b99a, 0xeac0c6e6, 0xe5b906e6,

	0xe0ccdeeb, 0xdbfbb796, 0xd744fcc9, 0xd2a81d91, 0xce248c14, 0xc9b9bd85,

	0xc5672a10, 0xc12c4cc9, 0xbd08a39e, 0xb8fbaf46, 0xb504f333, 0xb123f581,

	0xad583ee9, 0xa9a15ab4, 0xa5fed6a9, 0xa2704302, 0x9ef5325f, 0x9b8d39b9,

	0x9837f050, 0x94f4efa8, 0x91c3d373, 0x8ea4398a, 0x8b95c1e3, 0x88980e80,

	0x85aac367, 0x82cd8698,

};



/*

 * Approximate:

 *   val * y^n,    where y^32 ~= 0.5 (~1 scheduling period)

kernel/sched/sched-pelt.h

0 → 100644
+13 −0
Original line number Diff line number Diff line 
/* Generated by Documentation/scheduler/sched-pelt; do not modify. */



static const u32 runnable_avg_yN_inv[] = {

	0xffffffff, 0xfa83b2da, 0xf5257d14, 0xefe4b99a, 0xeac0c6e6, 0xe5b906e6,

	0xe0ccdeeb, 0xdbfbb796, 0xd744fcc9, 0xd2a81d91, 0xce248c14, 0xc9b9bd85,

	0xc5672a10, 0xc12c4cc9, 0xbd08a39e, 0xb8fbaf46, 0xb504f333, 0xb123f581,

	0xad583ee9, 0xa9a15ab4, 0xa5fed6a9, 0xa2704302, 0x9ef5325f, 0x9b8d39b9,

	0x9837f050, 0x94f4efa8, 0x91c3d373, 0x8ea4398a, 0x8b95c1e3, 0x88980e80,

	0x85aac367, 0x82cd8698,

};



#define LOAD_AVG_PERIOD 32

#define LOAD_AVG_MAX 47742