projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a9caa3de | 1 | #include <linux/fs.h> |
| 96177602 AD |
2 | #include <linux/init.h> |
| 3 | #include <linux/proc_fs.h> | |
| 4 | #include <linux/sched.h> | |
| a9caa3de | 5 | #include <linux/seq_file.h> |
| 96177602 | 6 | #include <linux/time.h> |
| 96830a57 | 7 | #include <linux/kernel_stat.h> |
| 96177602 AD |
8 | #include <asm/cputime.h> |
| 9 | ||
| a9caa3de | 10 | static int uptime_proc_show(struct seq_file *m, void *v) |
| 96177602 AD |
11 | { |
| 12 | struct timespec uptime; | |
| 13 | struct timespec idle; | |
| 612ef28a | 14 | u64 idletime; |
| c3e0ef9a MS |
15 | u64 nsec; |
| 16 | u32 rem; | |
| 96830a57 | 17 | int i; |
| 96830a57 | 18 | |
| c3e0ef9a | 19 | idletime = 0; |
| 96830a57 | 20 | for_each_possible_cpu(i) |
| 612ef28a | 21 | idletime += (__force u64) kcpustat_cpu(i).cpustat[CPUTIME_IDLE]; |
| 96177602 AD |
22 | |
| 23 | do_posix_clock_monotonic_gettime(&uptime); | |
| 24 | monotonic_to_bootbased(&uptime); | |
| c3e0ef9a MS |
25 | nsec = cputime64_to_jiffies64(idletime) * TICK_NSEC; |
| 26 | idle.tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem); | |
| 27 | idle.tv_nsec = rem; | |
| a9caa3de | 28 | seq_printf(m, "%lu.%02lu %lu.%02lu\n", |
| 96177602 AD |
29 | (unsigned long) uptime.tv_sec, |
| 30 | (uptime.tv_nsec / (NSEC_PER_SEC / 100)), | |
| 31 | (unsigned long) idle.tv_sec, | |
| 32 | (idle.tv_nsec / (NSEC_PER_SEC / 100))); | |
| a9caa3de | 33 | return 0; |
| 96177602 AD |
34 | } |
| 35 | ||
| a9caa3de AD |
36 | static int uptime_proc_open(struct inode *inode, struct file *file) |
| 37 | { | |
| 38 | return single_open(file, uptime_proc_show, NULL); | |
| 39 | } | |
| 40 | ||
| 41 | static const struct file_operations uptime_proc_fops = { | |
| 42 | .open = uptime_proc_open, | |
| 43 | .read = seq_read, | |
| 44 | .llseek = seq_lseek, | |
| 45 | .release = single_release, | |
| 46 | }; | |
| 47 | ||
| 96177602 AD |
48 | static int __init proc_uptime_init(void) |
| 49 | { | |
| a9caa3de | 50 | proc_create("uptime", 0, NULL, &uptime_proc_fops); |
| 96177602 AD |
51 | return 0; |
| 52 | } | |
| 53 | module_init(proc_uptime_init); |