1 #include <linux/fs.h> 2 #include <linux/init.h> 3 #include <linux/pid_namespace.h> 4 #include <linux/proc_fs.h> 5 #include <linux/sched.h> 6 #include <linux/sched/loadavg.h> 7 #include <linux/seq_file.h> 8 #include <linux/seqlock.h> 9 #include <linux/time.h> 10 11 #define LOAD_INT(x) ((x) >> FSHIFT) 12 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) 13 14 static int loadavg_proc_show(struct seq_file *m, void *v) 15 { 16 unsigned long avnrun[3]; 17 18 get_avenrun(avnrun, FIXED_1/200, 0); 19 20 seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d\n", 21 LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]), 22 LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]), 23 LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]), 24 nr_running(), nr_threads, 25 task_active_pid_ns(current)->last_pid); 26 return 0; 27 } 28 29 static int loadavg_proc_open(struct inode *inode, struct file *file) 30 { 31 return single_open(file, loadavg_proc_show, NULL); 32 } 33 34 static const struct file_operations loadavg_proc_fops = { 35 .open = loadavg_proc_open, 36 .read = seq_read, 37 .llseek = seq_lseek, 38 .release = single_release, 39 }; 40 41 static int __init proc_loadavg_init(void) 42 { 43 proc_create("loadavg", 0, NULL, &loadavg_proc_fops); 44 return 0; 45 } 46 fs_initcall(proc_loadavg_init); 47