1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/fs.h> 3 #include <linux/init.h> 4 #include <linux/pid_namespace.h> 5 #include <linux/proc_fs.h> 6 #include <linux/sched.h> 7 #include <linux/sched/loadavg.h> 8 #include <linux/sched/stat.h> 9 #include <linux/seq_file.h> 10 #include <linux/seqlock.h> 11 #include <linux/time.h> 12 13 #define LOAD_INT(x) ((x) >> FSHIFT) 14 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) 15 16 static int loadavg_proc_show(struct seq_file *m, void *v) 17 { 18 unsigned long avnrun[3]; 19 20 get_avenrun(avnrun, FIXED_1/200, 0); 21 22 seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d\n", 23 LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]), 24 LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]), 25 LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]), 26 nr_running(), nr_threads, 27 idr_get_cursor(&task_active_pid_ns(current)->idr)); 28 return 0; 29 } 30 31 static int loadavg_proc_open(struct inode *inode, struct file *file) 32 { 33 return single_open(file, loadavg_proc_show, NULL); 34 } 35 36 static const struct file_operations loadavg_proc_fops = { 37 .open = loadavg_proc_open, 38 .read = seq_read, 39 .llseek = seq_lseek, 40 .release = single_release, 41 }; 42 43 static int __init proc_loadavg_init(void) 44 { 45 proc_create("loadavg", 0, NULL, &loadavg_proc_fops); 46 return 0; 47 } 48 fs_initcall(proc_loadavg_init); 49