Linux 2.6.31.6
[linux/fpc-iii.git] / fs / proc / stat.c
blob7cc726c6d70a3d9383673e2de06f26b58bb4ed50
1 #include <linux/cpumask.h>
2 #include <linux/fs.h>
3 #include <linux/gfp.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 <linux/irqnr.h>
13 #include <asm/cputime.h>
15 #ifndef arch_irq_stat_cpu
16 #define arch_irq_stat_cpu(cpu) 0
17 #endif
18 #ifndef arch_irq_stat
19 #define arch_irq_stat() 0
20 #endif
21 #ifndef arch_idle_time
22 #define arch_idle_time(cpu) 0
23 #endif
25 static int show_stat(struct seq_file *p, void *v)
27 int i, j;
28 unsigned long jif;
29 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
30 cputime64_t guest;
31 u64 sum = 0;
32 u64 sum_softirq = 0;
33 unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
34 struct timespec boottime;
35 unsigned int per_irq_sum;
37 user = nice = system = idle = iowait =
38 irq = softirq = steal = cputime64_zero;
39 guest = cputime64_zero;
40 getboottime(&boottime);
41 jif = boottime.tv_sec;
43 for_each_possible_cpu(i) {
44 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
45 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
46 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
47 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
48 idle = cputime64_add(idle, arch_idle_time(i));
49 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
50 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
51 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
52 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
53 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
54 for_each_irq_nr(j) {
55 sum += kstat_irqs_cpu(j, i);
57 sum += arch_irq_stat_cpu(i);
59 for (j = 0; j < NR_SOFTIRQS; j++) {
60 unsigned int softirq_stat = kstat_softirqs_cpu(j, i);
62 per_softirq_sums[j] += softirq_stat;
63 sum_softirq += softirq_stat;
66 sum += arch_irq_stat();
68 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
69 (unsigned long long)cputime64_to_clock_t(user),
70 (unsigned long long)cputime64_to_clock_t(nice),
71 (unsigned long long)cputime64_to_clock_t(system),
72 (unsigned long long)cputime64_to_clock_t(idle),
73 (unsigned long long)cputime64_to_clock_t(iowait),
74 (unsigned long long)cputime64_to_clock_t(irq),
75 (unsigned long long)cputime64_to_clock_t(softirq),
76 (unsigned long long)cputime64_to_clock_t(steal),
77 (unsigned long long)cputime64_to_clock_t(guest));
78 for_each_online_cpu(i) {
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;
85 idle = cputime64_add(idle, arch_idle_time(i));
86 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;
91 seq_printf(p,
92 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
94 (unsigned long long)cputime64_to_clock_t(user),
95 (unsigned long long)cputime64_to_clock_t(nice),
96 (unsigned long long)cputime64_to_clock_t(system),
97 (unsigned long long)cputime64_to_clock_t(idle),
98 (unsigned long long)cputime64_to_clock_t(iowait),
99 (unsigned long long)cputime64_to_clock_t(irq),
100 (unsigned long long)cputime64_to_clock_t(softirq),
101 (unsigned long long)cputime64_to_clock_t(steal),
102 (unsigned long long)cputime64_to_clock_t(guest));
104 seq_printf(p, "intr %llu", (unsigned long long)sum);
106 /* sum again ? it could be updated? */
107 for_each_irq_nr(j) {
108 per_irq_sum = 0;
109 for_each_possible_cpu(i)
110 per_irq_sum += kstat_irqs_cpu(j, i);
112 seq_printf(p, " %u", per_irq_sum);
115 seq_printf(p,
116 "\nctxt %llu\n"
117 "btime %lu\n"
118 "processes %lu\n"
119 "procs_running %lu\n"
120 "procs_blocked %lu\n",
121 nr_context_switches(),
122 (unsigned long)jif,
123 total_forks,
124 nr_running(),
125 nr_iowait());
127 seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq);
129 for (i = 0; i < NR_SOFTIRQS; i++)
130 seq_printf(p, " %u", per_softirq_sums[i]);
131 seq_printf(p, "\n");
133 return 0;
136 static int stat_open(struct inode *inode, struct file *file)
138 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
139 char *buf;
140 struct seq_file *m;
141 int res;
143 /* don't ask for more than the kmalloc() max size, currently 128 KB */
144 if (size > 128 * 1024)
145 size = 128 * 1024;
146 buf = kmalloc(size, GFP_KERNEL);
147 if (!buf)
148 return -ENOMEM;
150 res = single_open(file, show_stat, NULL);
151 if (!res) {
152 m = file->private_data;
153 m->buf = buf;
154 m->size = size;
155 } else
156 kfree(buf);
157 return res;
160 static const struct file_operations proc_stat_operations = {
161 .open = stat_open,
162 .read = seq_read,
163 .llseek = seq_lseek,
164 .release = single_release,
167 static int __init proc_stat_init(void)
169 proc_create("stat", 0, NULL, &proc_stat_operations);
170 return 0;
172 module_init(proc_stat_init);