blob: 9758b654a1bcffe27c414ef322f34cd6a8658c33 [file] [log] [blame]
Alexey Dobriyandf8106d2008-10-05 00:01:56 +04001#include <linux/cpumask.h>
2#include <linux/fs.h>
Alexey Dobriyandf8106d2008-10-05 00:01:56 +04003#include <linux/init.h>
4#include <linux/interrupt.h>
5#include <linux/kernel_stat.h>
6#include <linux/proc_fs.h>
7#include <linux/sched.h>
8#include <linux/seq_file.h>
9#include <linux/slab.h>
10#include <linux/time.h>
KOSAKI Motohiro26ddd8d2008-12-26 14:24:10 +090011#include <linux/irqnr.h>
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040012#include <asm/cputime.h>
13
14#ifndef arch_irq_stat_cpu
15#define arch_irq_stat_cpu(cpu) 0
16#endif
17#ifndef arch_irq_stat
18#define arch_irq_stat() 0
19#endif
Martin Schwidefskye1c80532009-04-23 13:58:08 +020020#ifndef arch_idle_time
21#define arch_idle_time(cpu) 0
22#endif
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040023
24static int show_stat(struct seq_file *p, void *v)
25{
26 int i, j;
27 unsigned long jif;
28 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
Ryota Ozakice0e7b22009-10-24 01:20:10 +090029 cputime64_t guest, guest_nice;
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040030 u64 sum = 0;
Keika Kobayashid3d64df2009-06-17 16:25:55 -070031 u64 sum_softirq = 0;
32 unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040033 struct timespec boottime;
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040034
35 user = nice = system = idle = iowait =
36 irq = softirq = steal = cputime64_zero;
Ryota Ozakice0e7b22009-10-24 01:20:10 +090037 guest = guest_nice = cputime64_zero;
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040038 getboottime(&boottime);
39 jif = boottime.tv_sec;
40
41 for_each_possible_cpu(i) {
42 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
43 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
44 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
45 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
Martin Schwidefskye1c80532009-04-23 13:58:08 +020046 idle = cputime64_add(idle, arch_idle_time(i));
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040047 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
48 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
49 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
50 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
51 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
Ryota Ozakice0e7b22009-10-24 01:20:10 +090052 guest_nice = cputime64_add(guest_nice,
53 kstat_cpu(i).cpustat.guest_nice);
KAMEZAWA Hiroyukif2c66cd2010-10-27 15:34:13 -070054 sum += kstat_cpu_irqs_sum(i);
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040055 sum += arch_irq_stat_cpu(i);
Keika Kobayashid3d64df2009-06-17 16:25:55 -070056
57 for (j = 0; j < NR_SOFTIRQS; j++) {
58 unsigned int softirq_stat = kstat_softirqs_cpu(j, i);
59
60 per_softirq_sums[j] += softirq_stat;
61 sum_softirq += softirq_stat;
62 }
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040063 }
64 sum += arch_irq_stat();
65
Ryota Ozakice0e7b22009-10-24 01:20:10 +090066 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu "
67 "%llu\n",
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040068 (unsigned long long)cputime64_to_clock_t(user),
69 (unsigned long long)cputime64_to_clock_t(nice),
70 (unsigned long long)cputime64_to_clock_t(system),
71 (unsigned long long)cputime64_to_clock_t(idle),
72 (unsigned long long)cputime64_to_clock_t(iowait),
73 (unsigned long long)cputime64_to_clock_t(irq),
74 (unsigned long long)cputime64_to_clock_t(softirq),
75 (unsigned long long)cputime64_to_clock_t(steal),
Ryota Ozakice0e7b22009-10-24 01:20:10 +090076 (unsigned long long)cputime64_to_clock_t(guest),
77 (unsigned long long)cputime64_to_clock_t(guest_nice));
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040078 for_each_online_cpu(i) {
79
80 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
81 user = kstat_cpu(i).cpustat.user;
82 nice = kstat_cpu(i).cpustat.nice;
83 system = kstat_cpu(i).cpustat.system;
84 idle = kstat_cpu(i).cpustat.idle;
Martin Schwidefskye1c80532009-04-23 13:58:08 +020085 idle = cputime64_add(idle, arch_idle_time(i));
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040086 iowait = kstat_cpu(i).cpustat.iowait;
87 irq = kstat_cpu(i).cpustat.irq;
88 softirq = kstat_cpu(i).cpustat.softirq;
89 steal = kstat_cpu(i).cpustat.steal;
90 guest = kstat_cpu(i).cpustat.guest;
Ryota Ozakice0e7b22009-10-24 01:20:10 +090091 guest_nice = kstat_cpu(i).cpustat.guest_nice;
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040092 seq_printf(p,
Ryota Ozakice0e7b22009-10-24 01:20:10 +090093 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu "
94 "%llu\n",
Alexey Dobriyandf8106d2008-10-05 00:01:56 +040095 i,
96 (unsigned long long)cputime64_to_clock_t(user),
97 (unsigned long long)cputime64_to_clock_t(nice),
98 (unsigned long long)cputime64_to_clock_t(system),
99 (unsigned long long)cputime64_to_clock_t(idle),
100 (unsigned long long)cputime64_to_clock_t(iowait),
101 (unsigned long long)cputime64_to_clock_t(irq),
102 (unsigned long long)cputime64_to_clock_t(softirq),
103 (unsigned long long)cputime64_to_clock_t(steal),
Ryota Ozakice0e7b22009-10-24 01:20:10 +0900104 (unsigned long long)cputime64_to_clock_t(guest),
105 (unsigned long long)cputime64_to_clock_t(guest_nice));
Alexey Dobriyandf8106d2008-10-05 00:01:56 +0400106 }
107 seq_printf(p, "intr %llu", (unsigned long long)sum);
108
109 /* sum again ? it could be updated? */
KAMEZAWA Hiroyuki478735e32010-10-27 15:34:15 -0700110 for_each_irq_nr(j)
111 seq_printf(p, " %u", kstat_irqs(j));
Alexey Dobriyandf8106d2008-10-05 00:01:56 +0400112
113 seq_printf(p,
114 "\nctxt %llu\n"
115 "btime %lu\n"
116 "processes %lu\n"
117 "procs_running %lu\n"
118 "procs_blocked %lu\n",
119 nr_context_switches(),
120 (unsigned long)jif,
121 total_forks,
122 nr_running(),
123 nr_iowait());
124
Keika Kobayashid3d64df2009-06-17 16:25:55 -0700125 seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq);
126
127 for (i = 0; i < NR_SOFTIRQS; i++)
128 seq_printf(p, " %u", per_softirq_sums[i]);
Alexey Dobriyan9d6de122011-01-12 17:00:32 -0800129 seq_putc(p, '\n');
Keika Kobayashid3d64df2009-06-17 16:25:55 -0700130
Alexey Dobriyandf8106d2008-10-05 00:01:56 +0400131 return 0;
132}
133
134static int stat_open(struct inode *inode, struct file *file)
135{
136 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
137 char *buf;
138 struct seq_file *m;
139 int res;
140
Yuanhan Liua4dbf0e2011-05-26 16:25:51 -0700141 /* don't ask for more than the kmalloc() max size */
142 if (size > KMALLOC_MAX_SIZE)
143 size = KMALLOC_MAX_SIZE;
Alexey Dobriyandf8106d2008-10-05 00:01:56 +0400144 buf = kmalloc(size, GFP_KERNEL);
145 if (!buf)
146 return -ENOMEM;
147
148 res = single_open(file, show_stat, NULL);
149 if (!res) {
150 m = file->private_data;
151 m->buf = buf;
152 m->size = size;
153 } else
154 kfree(buf);
155 return res;
156}
157
158static const struct file_operations proc_stat_operations = {
159 .open = stat_open,
160 .read = seq_read,
161 .llseek = seq_lseek,
162 .release = single_release,
163};
164
165static int __init proc_stat_init(void)
166{
167 proc_create("stat", 0, NULL, &proc_stat_operations);
168 return 0;
169}
170module_init(proc_stat_init);