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refscale: Add test for sched_clock()

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

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
This commit is contained in:
Paul E. McKenney 2024-10-09 11:02:49 -07:00 committed by Uladzislau Rezki (Sony)
parent fac04efc5c
commit 1806b1f97f
1 changed files with 37 additions and 3 deletions
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40
kernel/rcu/refscale.c
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@ -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))