1 #include <linux/cpumask.h>
4 #include <linux/init.h>
5 #include <linux/interrupt.h>
6 #include <linux/kernel_stat.h>
7 #include <linux/proc_fs.h>
8 #include <linux/sched.h>
9 #include <linux/seq_file.h>
10 #include <linux/slab.h>
11 #include <linux/time.h>
12 #include <asm/cputime.h>
14 #ifndef arch_irq_stat_cpu
15 #define arch_irq_stat_cpu(cpu) 0
18 #define arch_irq_stat() 0
21 static int show_stat(struct seq_file *p, void *v)
25 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
28 struct timespec boottime;
29 unsigned int per_irq_sum;
30 struct irq_desc *desc;
32 user = nice = system = idle = iowait =
33 irq = softirq = steal = cputime64_zero;
34 guest = cputime64_zero;
35 getboottime(&boottime);
36 jif = boottime.tv_sec;
38 for_each_possible_cpu(i) {
39 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
40 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
41 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
42 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
43 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
44 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
45 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
46 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
47 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
49 #ifdef CONFIG_SPARSE_IRQ
50 desc = irq_to_desc(j);
54 sum += kstat_irqs_cpu(j, i);
56 sum += arch_irq_stat_cpu(i);
58 sum += arch_irq_stat();
60 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
61 (unsigned long long)cputime64_to_clock_t(user),
62 (unsigned long long)cputime64_to_clock_t(nice),
63 (unsigned long long)cputime64_to_clock_t(system),
64 (unsigned long long)cputime64_to_clock_t(idle),
65 (unsigned long long)cputime64_to_clock_t(iowait),
66 (unsigned long long)cputime64_to_clock_t(irq),
67 (unsigned long long)cputime64_to_clock_t(softirq),
68 (unsigned long long)cputime64_to_clock_t(steal),
69 (unsigned long long)cputime64_to_clock_t(guest));
70 for_each_online_cpu(i) {
72 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
73 user = kstat_cpu(i).cpustat.user;
74 nice = kstat_cpu(i).cpustat.nice;
75 system = kstat_cpu(i).cpustat.system;
76 idle = kstat_cpu(i).cpustat.idle;
77 iowait = kstat_cpu(i).cpustat.iowait;
78 irq = kstat_cpu(i).cpustat.irq;
79 softirq = kstat_cpu(i).cpustat.softirq;
80 steal = kstat_cpu(i).cpustat.steal;
81 guest = kstat_cpu(i).cpustat.guest;
83 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
85 (unsigned long long)cputime64_to_clock_t(user),
86 (unsigned long long)cputime64_to_clock_t(nice),
87 (unsigned long long)cputime64_to_clock_t(system),
88 (unsigned long long)cputime64_to_clock_t(idle),
89 (unsigned long long)cputime64_to_clock_t(iowait),
90 (unsigned long long)cputime64_to_clock_t(irq),
91 (unsigned long long)cputime64_to_clock_t(softirq),
92 (unsigned long long)cputime64_to_clock_t(steal),
93 (unsigned long long)cputime64_to_clock_t(guest));
95 seq_printf(p, "intr %llu", (unsigned long long)sum);
97 /* sum again ? it could be updated? */
100 #ifdef CONFIG_SPARSE_IRQ
101 desc = irq_to_desc(j);
103 seq_printf(p, " %u", per_irq_sum);
107 for_each_possible_cpu(i)
108 per_irq_sum += kstat_irqs_cpu(j, i);
110 seq_printf(p, " %u", per_irq_sum);
117 "procs_running %lu\n"
118 "procs_blocked %lu\n",
119 nr_context_switches(),
128 static int stat_open(struct inode *inode, struct file *file)
130 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
135 /* don't ask for more than the kmalloc() max size, currently 128 KB */
136 if (size > 128 * 1024)
138 buf = kmalloc(size, GFP_KERNEL);
142 res = single_open(file, show_stat, NULL);
144 m = file->private_data;
152 static const struct file_operations proc_stat_operations = {
156 .release = single_release,
159 static int __init proc_stat_init(void)
161 proc_create("stat", 0, NULL, &proc_stat_operations);
164 module_init(proc_stat_init);