mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 19:53:59 +08:00
cb08e0353c
The messages printed by tk_debug_account_sleep_time() are basically useful for system sleep debugging, so print them only when the other debug messages from the core suspend/hibernate code are enabled. While at it, make it clear that the messages from tk_debug_account_sleep_time() are about timekeeping suspend duration, because in general timekeeping may be suspeded and resumed for multiple times during one system suspend-resume cycle. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/*
|
|
* debugfs file to track time spent in suspend
|
|
*
|
|
* Copyright (c) 2011, Google, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#include <linux/debugfs.h>
|
|
#include <linux/err.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/suspend.h>
|
|
#include <linux/time.h>
|
|
|
|
#include "timekeeping_internal.h"
|
|
|
|
#define NUM_BINS 32
|
|
|
|
static unsigned int sleep_time_bin[NUM_BINS] = {0};
|
|
|
|
static int tk_debug_show_sleep_time(struct seq_file *s, void *data)
|
|
{
|
|
unsigned int bin;
|
|
seq_puts(s, " time (secs) count\n");
|
|
seq_puts(s, "------------------------------\n");
|
|
for (bin = 0; bin < 32; bin++) {
|
|
if (sleep_time_bin[bin] == 0)
|
|
continue;
|
|
seq_printf(s, "%10u - %-10u %4u\n",
|
|
bin ? 1 << (bin - 1) : 0, 1 << bin,
|
|
sleep_time_bin[bin]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int tk_debug_sleep_time_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, tk_debug_show_sleep_time, NULL);
|
|
}
|
|
|
|
static const struct file_operations tk_debug_sleep_time_fops = {
|
|
.open = tk_debug_sleep_time_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int __init tk_debug_sleep_time_init(void)
|
|
{
|
|
struct dentry *d;
|
|
|
|
d = debugfs_create_file("sleep_time", 0444, NULL, NULL,
|
|
&tk_debug_sleep_time_fops);
|
|
if (!d) {
|
|
pr_err("Failed to create sleep_time debug file\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
late_initcall(tk_debug_sleep_time_init);
|
|
|
|
void tk_debug_account_sleep_time(struct timespec64 *t)
|
|
{
|
|
/* Cap bin index so we don't overflow the array */
|
|
int bin = min(fls(t->tv_sec), NUM_BINS-1);
|
|
|
|
sleep_time_bin[bin]++;
|
|
pm_deferred_pr_dbg("Timekeeping suspended for %lld.%03lu seconds\n",
|
|
(s64)t->tv_sec, t->tv_nsec / NSEC_PER_MSEC);
|
|
}
|
|
|