mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
96830a57de
Git commit 79741dd changes idle cputime accounting, but unfortunately
the /proc/uptime file hasn't caught up. Here the idle time calculation
from /proc/stat is copied over.
Signed-off-by: Michael Abbott <michael.abbott@diamond.ac.uk>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
#include <linux/fs.h>
|
|
#include <linux/init.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/time.h>
|
|
#include <linux/kernel_stat.h>
|
|
#include <asm/cputime.h>
|
|
|
|
static int uptime_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
struct timespec uptime;
|
|
struct timespec idle;
|
|
int i;
|
|
cputime_t idletime = cputime_zero;
|
|
|
|
for_each_possible_cpu(i)
|
|
idletime = cputime64_add(idletime, kstat_cpu(i).cpustat.idle);
|
|
|
|
do_posix_clock_monotonic_gettime(&uptime);
|
|
monotonic_to_bootbased(&uptime);
|
|
cputime_to_timespec(idletime, &idle);
|
|
seq_printf(m, "%lu.%02lu %lu.%02lu\n",
|
|
(unsigned long) uptime.tv_sec,
|
|
(uptime.tv_nsec / (NSEC_PER_SEC / 100)),
|
|
(unsigned long) idle.tv_sec,
|
|
(idle.tv_nsec / (NSEC_PER_SEC / 100)));
|
|
return 0;
|
|
}
|
|
|
|
static int uptime_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, uptime_proc_show, NULL);
|
|
}
|
|
|
|
static const struct file_operations uptime_proc_fops = {
|
|
.open = uptime_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int __init proc_uptime_init(void)
|
|
{
|
|
proc_create("uptime", 0, NULL, &uptime_proc_fops);
|
|
return 0;
|
|
}
|
|
module_init(proc_uptime_init);
|