Commit 1806b1f9 authored by Paul E. McKenney's avatar Paul E. McKenney Committed by Uladzislau Rezki (Sony)
Browse files

refscale: Add test for sched_clock() 



This commit adds a "sched-clock" test for the sched_clock() function.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
Signed-off-by: default avatarFrederic Weisbecker <frederic@kernel.org>
Signed-off-by: default avatarUladzislau Rezki (Sony) <urezki@gmail.com>
parent fac04efc

kernel/rcu/refscale.c

+37 −3
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ 
#include <linux/slab.h>

#include <linux/torture.h>

#include <linux/types.h>

#include <linux/sched/clock.h>



#include "rcu.h"
@@ -531,6 +532,39 @@ static const struct ref_scale_ops acqrel_ops = { 


static volatile u64 stopopts;



static void ref_sched_clock_section(const int nloops)

{

	u64 x = 0;

	int i;



	preempt_disable();

	for (i = nloops; i >= 0; i--)

		x += sched_clock();

	preempt_enable();

	stopopts = x;

}



static void ref_sched_clock_delay_section(const int nloops, const int udl, const int ndl)

{

	u64 x = 0;

	int i;



	preempt_disable();

	for (i = nloops; i >= 0; i--) {

		x += sched_clock();

		un_delay(udl, ndl);

	}

	preempt_enable();

	stopopts = x;

}



static const struct ref_scale_ops sched_clock_ops = {

	.readsection	= ref_sched_clock_section,

	.delaysection	= ref_sched_clock_delay_section,

	.name		= "sched-clock"

};





static void ref_clock_section(const int nloops)

{

	u64 x = 0;
@@ -1130,9 +1164,9 @@ ref_scale_init(void) 
	int firsterr = 0;

	static const struct ref_scale_ops *scale_ops[] = {

		&rcu_ops, &srcu_ops, &srcu_lite_ops, RCU_TRACE_OPS RCU_TASKS_OPS

		&refcnt_ops, &rwlock_ops, &rwsem_ops, &lock_ops, &lock_irq_ops, &acqrel_ops,

		&clock_ops, &jiffies_ops, &typesafe_ref_ops, &typesafe_lock_ops,

		&typesafe_seqlock_ops,

		&refcnt_ops, &rwlock_ops, &rwsem_ops, &lock_ops, &lock_irq_ops,

		&acqrel_ops, &sched_clock_ops, &clock_ops, &jiffies_ops,

		&typesafe_ref_ops, &typesafe_lock_ops, &typesafe_seqlock_ops,

	};



	if (!torture_init_begin(scale_type, verbose))