ptrace: cleanup arch_ptrace() on xtensa
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / proc / stat.c
blobbf31b03fc275295e576554abdbea4f5264b99a23
1 #include <linux/cpumask.h>
2 #include <linux/fs.h>
3 #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>
11 #include <linux/irqnr.h>
12 #include <asm/cputime.h>
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
20 #ifndef arch_idle_time
21 #define arch_idle_time(cpu) 0
22 #endif
24 static int show_stat(struct seq_file *p, void *v)
26 int i, j;
27 unsigned long jif;
28 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
29 cputime64_t guest, guest_nice;
30 u64 sum = 0;
31 u64 sum_softirq = 0;
32 unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
33 struct timespec boottime;
34 unsigned int per_irq_sum;
36 user = nice = system = idle = iowait =
37 irq = softirq = steal = cputime64_zero;
38 guest = guest_nice = cputime64_zero;
39 getboottime(&boottime);
40 jif = boottime.tv_sec;
42 for_each_possible_cpu(i) {
43 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
44 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
45 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
46 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
47 idle = cputime64_add(idle, arch_idle_time(i));
48 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
49 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
50 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
51 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
52 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
53 guest_nice = cputime64_add(guest_nice,
54 kstat_cpu(i).cpustat.guest_nice);
55 for_each_irq_nr(j) {
56 sum += kstat_irqs_cpu(j, i);
58 sum += arch_irq_stat_cpu(i);
60 for (j = 0; j < NR_SOFTIRQS; j++) {
61 unsigned int softirq_stat = kstat_softirqs_cpu(j, i);
63 per_softirq_sums[j] += softirq_stat;
64 sum_softirq += softirq_stat;
67 sum += arch_irq_stat();
69 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu "
70 "%llu\n",
71 (unsigned long long)cputime64_to_clock_t(user),
72 (unsigned long long)cputime64_to_clock_t(nice),
73 (unsigned long long)cputime64_to_clock_t(system),
74 (unsigned long long)cputime64_to_clock_t(idle),
75 (unsigned long long)cputime64_to_clock_t(iowait),
76 (unsigned long long)cputime64_to_clock_t(irq),
77 (unsigned long long)cputime64_to_clock_t(softirq),
78 (unsigned long long)cputime64_to_clock_t(steal),
79 (unsigned long long)cputime64_to_clock_t(guest),
80 (unsigned long long)cputime64_to_clock_t(guest_nice));
81 for_each_online_cpu(i) {
83 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
84 user = kstat_cpu(i).cpustat.user;
85 nice = kstat_cpu(i).cpustat.nice;
86 system = kstat_cpu(i).cpustat.system;
87 idle = kstat_cpu(i).cpustat.idle;
88 idle = cputime64_add(idle, arch_idle_time(i));
89 iowait = kstat_cpu(i).cpustat.iowait;
90 irq = kstat_cpu(i).cpustat.irq;
91 softirq = kstat_cpu(i).cpustat.softirq;
92 steal = kstat_cpu(i).cpustat.steal;
93 guest = kstat_cpu(i).cpustat.guest;
94 guest_nice = kstat_cpu(i).cpustat.guest_nice;
95 seq_printf(p,
96 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu "
97 "%llu\n",
99 (unsigned long long)cputime64_to_clock_t(user),
100 (unsigned long long)cputime64_to_clock_t(nice),
101 (unsigned long long)cputime64_to_clock_t(system),
102 (unsigned long long)cputime64_to_clock_t(idle),
103 (unsigned long long)cputime64_to_clock_t(iowait),
104 (unsigned long long)cputime64_to_clock_t(irq),
105 (unsigned long long)cputime64_to_clock_t(softirq),
106 (unsigned long long)cputime64_to_clock_t(steal),
107 (unsigned long long)cputime64_to_clock_t(guest),
108 (unsigned long long)cputime64_to_clock_t(guest_nice));
110 seq_printf(p, "intr %llu", (unsigned long long)sum);
112 /* sum again ? it could be updated? */
113 for_each_irq_nr(j) {
114 per_irq_sum = 0;
115 for_each_possible_cpu(i)
116 per_irq_sum += kstat_irqs_cpu(j, i);
118 seq_printf(p, " %u", per_irq_sum);
121 seq_printf(p,
122 "\nctxt %llu\n"
123 "btime %lu\n"
124 "processes %lu\n"
125 "procs_running %lu\n"
126 "procs_blocked %lu\n",
127 nr_context_switches(),
128 (unsigned long)jif,
129 total_forks,
130 nr_running(),
131 nr_iowait());
133 seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq);
135 for (i = 0; i < NR_SOFTIRQS; i++)
136 seq_printf(p, " %u", per_softirq_sums[i]);
137 seq_printf(p, "\n");
139 return 0;
142 static int stat_open(struct inode *inode, struct file *file)
144 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
145 char *buf;
146 struct seq_file *m;
147 int res;
149 /* don't ask for more than the kmalloc() max size, currently 128 KB */
150 if (size > 128 * 1024)
151 size = 128 * 1024;
152 buf = kmalloc(size, GFP_KERNEL);
153 if (!buf)
154 return -ENOMEM;
156 res = single_open(file, show_stat, NULL);
157 if (!res) {
158 m = file->private_data;
159 m->buf = buf;
160 m->size = size;
161 } else
162 kfree(buf);
163 return res;
166 static const struct file_operations proc_stat_operations = {
167 .open = stat_open,
168 .read = seq_read,
169 .llseek = seq_lseek,
170 .release = single_release,
173 static int __init proc_stat_init(void)
175 proc_create("stat", 0, NULL, &proc_stat_operations);
176 return 0;
178 module_init(proc_stat_init);