Commit 4b7a08a0 authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

delayacct: Use sched_clock() 



Like all scheduler statistics, use sched_clock() based time.

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarRik van Riel <riel@surriel.com>
Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarIngo Molnar <mingo@kernel.org>
Acked-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
Acked-by: default avatarBalbir Singh <bsingharora@gmail.com>
Link: https://lkml.kernel.org/r/20210505111525.001031466@infradead.org
parent 619e090c

kernel/delayacct.c

+10 −12
Original line number Diff line number Diff line
@@ -7,9 +7,9 @@ 
#include <linux/sched.h>

#include <linux/sched/task.h>

#include <linux/sched/cputime.h>

#include <linux/sched/clock.h>

#include <linux/slab.h>

#include <linux/taskstats.h>

#include <linux/time.h>

#include <linux/sysctl.h>

#include <linux/delayacct.h>

#include <linux/module.h>
@@ -42,10 +42,9 @@ void __delayacct_tsk_init(struct task_struct *tsk) 
 * Finish delay accounting for a statistic using its timestamps (@start),

 * accumalator (@total) and @count

 */

static void delayacct_end(raw_spinlock_t *lock, u64 *start, u64 *total,

			  u32 *count)

static void delayacct_end(raw_spinlock_t *lock, u64 *start, u64 *total, u32 *count)

{

	s64 ns = ktime_get_ns() - *start;

	s64 ns = local_clock() - *start;

	unsigned long flags;



	if (ns > 0) {
@@ -58,7 +57,7 @@ static void delayacct_end(raw_spinlock_t *lock, u64 *start, u64 *total, 


void __delayacct_blkio_start(void)

{

	current->delays->blkio_start = ktime_get_ns();

	current->delays->blkio_start = local_clock();

}



/*
@@ -151,13 +150,12 @@ __u64 __delayacct_blkio_ticks(struct task_struct *tsk) 


void __delayacct_freepages_start(void)

{

	current->delays->freepages_start = ktime_get_ns();

	current->delays->freepages_start = local_clock();

}



void __delayacct_freepages_end(void)

{

	delayacct_end(

		&current->delays->lock,

	delayacct_end(&current->delays->lock,

		      &current->delays->freepages_start,

		      &current->delays->freepages_delay,

		      &current->delays->freepages_count);
@@ -165,7 +163,7 @@ void __delayacct_freepages_end(void) 


void __delayacct_thrashing_start(void)

{

	current->delays->thrashing_start = ktime_get_ns();

	current->delays->thrashing_start = local_clock();

}



void __delayacct_thrashing_end(void)