1 #include <linux/init.h> 2 #include <linux/kernel_stat.h> 3 #include <linux/proc_fs.h> 4 #include <linux/seq_file.h> 5 6 /* 7 * /proc/softirqs ... display the number of softirqs 8 */ 9 static int show_softirqs(struct seq_file *p, void *v) 10 { 11 int i, j; 12 13 seq_puts(p, " "); 14 for_each_possible_cpu(i) 15 seq_printf(p, "CPU%-8d", i); 16 seq_putc(p, '\n'); 17 18 for (i = 0; i < NR_SOFTIRQS; i++) { 19 seq_printf(p, "%12s:", softirq_to_name[i]); 20 for_each_possible_cpu(j) 21 seq_printf(p, " %10u", kstat_softirqs_cpu(i, j)); 22 seq_putc(p, '\n'); 23 } 24 return 0; 25 } 26 27 static int softirqs_open(struct inode *inode, struct file *file) 28 { 29 return single_open(file, show_softirqs, NULL); 30 } 31 32 static const struct file_operations proc_softirqs_operations = { 33 .open = softirqs_open, 34 .read = seq_read, 35 .llseek = seq_lseek, 36 .release = single_release, 37 }; 38 39 static int __init proc_softirqs_init(void) 40 { 41 proc_create("softirqs", 0, NULL, &proc_softirqs_operations); 42 return 0; 43 } 44 module_init(proc_softirqs_init); 45