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;
31 user = nice = system = idle = iowait =
32 irq = softirq = steal = cputime64_zero;
33 guest = cputime64_zero;
34 getboottime(&boottime);
35 jif = boottime.tv_sec;
37 for_each_possible_cpu(i) {
38 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
39 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
40 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
41 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
42 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
43 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
44 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
45 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
46 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
48 #ifdef CONFIG_SPARSE_IRQ
52 sum += kstat_irqs_cpu(j, i);
54 sum += arch_irq_stat_cpu(i);
56 sum += arch_irq_stat();
58 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
59 (unsigned long long)cputime64_to_clock_t(user),
60 (unsigned long long)cputime64_to_clock_t(nice),
61 (unsigned long long)cputime64_to_clock_t(system),
62 (unsigned long long)cputime64_to_clock_t(idle),
63 (unsigned long long)cputime64_to_clock_t(iowait),
64 (unsigned long long)cputime64_to_clock_t(irq),
65 (unsigned long long)cputime64_to_clock_t(softirq),
66 (unsigned long long)cputime64_to_clock_t(steal),
67 (unsigned long long)cputime64_to_clock_t(guest));
68 for_each_online_cpu(i) {
70 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
71 user = kstat_cpu(i).cpustat.user;
72 nice = kstat_cpu(i).cpustat.nice;
73 system = kstat_cpu(i).cpustat.system;
74 idle = kstat_cpu(i).cpustat.idle;
75 iowait = kstat_cpu(i).cpustat.iowait;
76 irq = kstat_cpu(i).cpustat.irq;
77 softirq = kstat_cpu(i).cpustat.softirq;
78 steal = kstat_cpu(i).cpustat.steal;
79 guest = kstat_cpu(i).cpustat.guest;
81 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
83 (unsigned long long)cputime64_to_clock_t(user),
84 (unsigned long long)cputime64_to_clock_t(nice),
85 (unsigned long long)cputime64_to_clock_t(system),
86 (unsigned long long)cputime64_to_clock_t(idle),
87 (unsigned long long)cputime64_to_clock_t(iowait),
88 (unsigned long long)cputime64_to_clock_t(irq),
89 (unsigned long long)cputime64_to_clock_t(softirq),
90 (unsigned long long)cputime64_to_clock_t(steal),
91 (unsigned long long)cputime64_to_clock_t(guest));
93 seq_printf(p, "intr %llu", (unsigned long long)sum);
95 /* sum again ? it could be updated? */
98 #ifdef CONFIG_SPARSE_IRQ
99 if (!irq_to_desc(j)) {
100 seq_printf(p, " %u", per_irq_sum);
104 for_each_possible_cpu(i)
105 per_irq_sum += kstat_irqs_cpu(j, i);
107 seq_printf(p, " %u", per_irq_sum);
114 "procs_running %lu\n"
115 "procs_blocked %lu\n",
116 nr_context_switches(),
125 static int stat_open(struct inode *inode, struct file *file)
127 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
132 /* don't ask for more than the kmalloc() max size, currently 128 KB */
133 if (size > 128 * 1024)
135 buf = kmalloc(size, GFP_KERNEL);
139 res = single_open(file, show_stat, NULL);
141 m = file->private_data;
149 static const struct file_operations proc_stat_operations = {
153 .release = single_release,
156 static int __init proc_stat_init(void)
158 proc_create("stat", 0, NULL, &proc_stat_operations);
161 module_init(proc_stat_init);