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df8106db AD |
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> | |
26ddd8d5 | 12 | #include <linux/irqnr.h> |
df8106db AD |
13 | #include <asm/cputime.h> |
14 | ||
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 | |
e1c80530 MS |
21 | #ifndef arch_idle_time |
22 | #define arch_idle_time(cpu) 0 | |
23 | #endif | |
df8106db AD |
24 | |
25 | static int show_stat(struct seq_file *p, void *v) | |
26 | { | |
27 | int i, j; | |
28 | unsigned long jif; | |
29 | cputime64_t user, nice, system, idle, iowait, irq, softirq, steal; | |
ce0e7b28 | 30 | cputime64_t guest, guest_nice; |
df8106db | 31 | u64 sum = 0; |
d3d64df2 KK |
32 | u64 sum_softirq = 0; |
33 | unsigned int per_softirq_sums[NR_SOFTIRQS] = {0}; | |
df8106db AD |
34 | struct timespec boottime; |
35 | unsigned int per_irq_sum; | |
36 | ||
37 | user = nice = system = idle = iowait = | |
38 | irq = softirq = steal = cputime64_zero; | |
ce0e7b28 | 39 | guest = guest_nice = cputime64_zero; |
df8106db AD |
40 | getboottime(&boottime); |
41 | jif = boottime.tv_sec; | |
42 | ||
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); | |
e1c80530 | 48 | idle = cputime64_add(idle, arch_idle_time(i)); |
df8106db AD |
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); | |
ce0e7b28 RO |
54 | guest_nice = cputime64_add(guest_nice, |
55 | kstat_cpu(i).cpustat.guest_nice); | |
240d367b | 56 | for_each_irq_nr(j) { |
df8106db | 57 | sum += kstat_irqs_cpu(j, i); |
0b8f1efa | 58 | } |
df8106db | 59 | sum += arch_irq_stat_cpu(i); |
d3d64df2 KK |
60 | |
61 | for (j = 0; j < NR_SOFTIRQS; j++) { | |
62 | unsigned int softirq_stat = kstat_softirqs_cpu(j, i); | |
63 | ||
64 | per_softirq_sums[j] += softirq_stat; | |
65 | sum_softirq += softirq_stat; | |
66 | } | |
df8106db AD |
67 | } |
68 | sum += arch_irq_stat(); | |
69 | ||
ce0e7b28 RO |
70 | seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu " |
71 | "%llu\n", | |
df8106db AD |
72 | (unsigned long long)cputime64_to_clock_t(user), |
73 | (unsigned long long)cputime64_to_clock_t(nice), | |
74 | (unsigned long long)cputime64_to_clock_t(system), | |
75 | (unsigned long long)cputime64_to_clock_t(idle), | |
76 | (unsigned long long)cputime64_to_clock_t(iowait), | |
77 | (unsigned long long)cputime64_to_clock_t(irq), | |
78 | (unsigned long long)cputime64_to_clock_t(softirq), | |
79 | (unsigned long long)cputime64_to_clock_t(steal), | |
ce0e7b28 RO |
80 | (unsigned long long)cputime64_to_clock_t(guest), |
81 | (unsigned long long)cputime64_to_clock_t(guest_nice)); | |
df8106db AD |
82 | for_each_online_cpu(i) { |
83 | ||
84 | /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ | |
85 | user = kstat_cpu(i).cpustat.user; | |
86 | nice = kstat_cpu(i).cpustat.nice; | |
87 | system = kstat_cpu(i).cpustat.system; | |
88 | idle = kstat_cpu(i).cpustat.idle; | |
e1c80530 | 89 | idle = cputime64_add(idle, arch_idle_time(i)); |
df8106db AD |
90 | iowait = kstat_cpu(i).cpustat.iowait; |
91 | irq = kstat_cpu(i).cpustat.irq; | |
92 | softirq = kstat_cpu(i).cpustat.softirq; | |
93 | steal = kstat_cpu(i).cpustat.steal; | |
94 | guest = kstat_cpu(i).cpustat.guest; | |
ce0e7b28 | 95 | guest_nice = kstat_cpu(i).cpustat.guest_nice; |
df8106db | 96 | seq_printf(p, |
ce0e7b28 RO |
97 | "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu " |
98 | "%llu\n", | |
df8106db AD |
99 | i, |
100 | (unsigned long long)cputime64_to_clock_t(user), | |
101 | (unsigned long long)cputime64_to_clock_t(nice), | |
102 | (unsigned long long)cputime64_to_clock_t(system), | |
103 | (unsigned long long)cputime64_to_clock_t(idle), | |
104 | (unsigned long long)cputime64_to_clock_t(iowait), | |
105 | (unsigned long long)cputime64_to_clock_t(irq), | |
106 | (unsigned long long)cputime64_to_clock_t(softirq), | |
107 | (unsigned long long)cputime64_to_clock_t(steal), | |
ce0e7b28 RO |
108 | (unsigned long long)cputime64_to_clock_t(guest), |
109 | (unsigned long long)cputime64_to_clock_t(guest_nice)); | |
df8106db AD |
110 | } |
111 | seq_printf(p, "intr %llu", (unsigned long long)sum); | |
112 | ||
113 | /* sum again ? it could be updated? */ | |
240d367b | 114 | for_each_irq_nr(j) { |
df8106db | 115 | per_irq_sum = 0; |
240d367b YL |
116 | for_each_possible_cpu(i) |
117 | per_irq_sum += kstat_irqs_cpu(j, i); | |
df8106db AD |
118 | |
119 | seq_printf(p, " %u", per_irq_sum); | |
120 | } | |
121 | ||
122 | seq_printf(p, | |
123 | "\nctxt %llu\n" | |
124 | "btime %lu\n" | |
125 | "processes %lu\n" | |
126 | "procs_running %lu\n" | |
127 | "procs_blocked %lu\n", | |
128 | nr_context_switches(), | |
129 | (unsigned long)jif, | |
130 | total_forks, | |
131 | nr_running(), | |
132 | nr_iowait()); | |
133 | ||
d3d64df2 KK |
134 | seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq); |
135 | ||
136 | for (i = 0; i < NR_SOFTIRQS; i++) | |
137 | seq_printf(p, " %u", per_softirq_sums[i]); | |
138 | seq_printf(p, "\n"); | |
139 | ||
df8106db AD |
140 | return 0; |
141 | } | |
142 | ||
143 | static int stat_open(struct inode *inode, struct file *file) | |
144 | { | |
145 | unsigned size = 4096 * (1 + num_possible_cpus() / 32); | |
146 | char *buf; | |
147 | struct seq_file *m; | |
148 | int res; | |
149 | ||
150 | /* don't ask for more than the kmalloc() max size, currently 128 KB */ | |
151 | if (size > 128 * 1024) | |
152 | size = 128 * 1024; | |
153 | buf = kmalloc(size, GFP_KERNEL); | |
154 | if (!buf) | |
155 | return -ENOMEM; | |
156 | ||
157 | res = single_open(file, show_stat, NULL); | |
158 | if (!res) { | |
159 | m = file->private_data; | |
160 | m->buf = buf; | |
161 | m->size = size; | |
162 | } else | |
163 | kfree(buf); | |
164 | return res; | |
165 | } | |
166 | ||
167 | static const struct file_operations proc_stat_operations = { | |
168 | .open = stat_open, | |
169 | .read = seq_read, | |
170 | .llseek = seq_lseek, | |
171 | .release = single_release, | |
172 | }; | |
173 | ||
174 | static int __init proc_stat_init(void) | |
175 | { | |
176 | proc_create("stat", 0, NULL, &proc_stat_operations); | |
177 | return 0; | |
178 | } | |
179 | module_init(proc_stat_init); |