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/sched/stat.h> 8 #include <linux/seq_file.h> 9 #include <linux/seqlock.h> 10 #include <linux/time.h> 11 12 #define LOAD_INT(x) ((x) >> FSHIFT) 13 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) 14 15 static int loadavg_proc_show(struct seq_file *m, void *v) 16 { 17 unsigned long avnrun[3]; 18 19 get_avenrun(avnrun, FIXED_1/200, 0); 20 21 seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d\n", 22 LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]), 23 LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]), 24 LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]), 25 nr_running(), nr_threads, 26 task_active_pid_ns(current)->last_pid); 27 return 0; 28 } 29 30 static int loadavg_proc_open(struct inode *inode, struct file *file) 31 { 32 return single_open(file, loadavg_proc_show, NULL); 33 } 34 35 static const struct file_operations loadavg_proc_fops = { 36 .open = loadavg_proc_open, 37 .read = seq_read, 38 .llseek = seq_lseek, 39 .release = single_release, 40 }; 41 42 static int __init proc_loadavg_init(void) 43 { 44 proc_create("loadavg", 0, NULL, &loadavg_proc_fops); 45 return 0; 46 } 47 fs_initcall(proc_loadavg_init); 48