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delayacct: Use sched_clock() 

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

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Link: https://lkml.kernel.org/r/20210505111525.001031466@infradead.org
This commit is contained in:
Peter Zijlstra 2021-05-04 22:43:48 +02:00
parent 619e090c8e
commit 4b7a08a0b6
1 changed files with 10 additions and 12 deletions
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22
kernel/delayacct.c
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@ -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();
}
/*
@ -151,21 +150,20 @@ __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,
&current->delays->freepages_start,
&current->delays->freepages_delay,
&current->delays->freepages_count);
delayacct_end(&current->delays->lock,
&current->delays->freepages_start,
&current->delays->freepages_delay,
&current->delays->freepages_count);
}
void __delayacct_thrashing_start(void)
{
current->delays->thrashing_start = ktime_get_ns();
current->delays->thrashing_start = local_clock();
}
void __delayacct_thrashing_end(void)