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df8106db AD |
1 | #include <linux/cpumask.h> |
2 | #include <linux/fs.h> | |
df8106db AD |
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> | |
26ddd8d5 | 11 | #include <linux/irqnr.h> |
df8106db AD |
12 | #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 | |
e1c80530 MS |
20 | #ifndef arch_idle_time |
21 | #define arch_idle_time(cpu) 0 | |
22 | #endif | |
df8106db AD |
23 | |
24 | static 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; | |
ce0e7b28 | 29 | cputime64_t guest, guest_nice; |
df8106db | 30 | u64 sum = 0; |
d3d64df2 KK |
31 | u64 sum_softirq = 0; |
32 | unsigned int per_softirq_sums[NR_SOFTIRQS] = {0}; | |
df8106db AD |
33 | struct timespec boottime; |
34 | unsigned int per_irq_sum; | |
35 | ||
36 | user = nice = system = idle = iowait = | |
37 | irq = softirq = steal = cputime64_zero; | |
ce0e7b28 | 38 | guest = guest_nice = cputime64_zero; |
df8106db AD |
39 | getboottime(&boottime); |
40 | jif = boottime.tv_sec; | |
41 | ||
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); | |
e1c80530 | 47 | idle = cputime64_add(idle, arch_idle_time(i)); |
df8106db AD |
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); | |
ce0e7b28 RO |
53 | guest_nice = cputime64_add(guest_nice, |
54 | kstat_cpu(i).cpustat.guest_nice); | |
240d367b | 55 | for_each_irq_nr(j) { |
df8106db | 56 | sum += kstat_irqs_cpu(j, i); |
0b8f1efa | 57 | } |
df8106db | 58 | sum += arch_irq_stat_cpu(i); |
d3d64df2 KK |
59 | |
60 | for (j = 0; j < NR_SOFTIRQS; j++) { | |
61 | unsigned int softirq_stat = kstat_softirqs_cpu(j, i); | |
62 | ||
63 | per_softirq_sums[j] += softirq_stat; | |
64 | sum_softirq += softirq_stat; | |
65 | } | |
df8106db AD |
66 | } |
67 | sum += arch_irq_stat(); | |
68 | ||
ce0e7b28 RO |
69 | seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu " |
70 | "%llu\n", | |
df8106db AD |
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), | |
ce0e7b28 RO |
79 | (unsigned long long)cputime64_to_clock_t(guest), |
80 | (unsigned long long)cputime64_to_clock_t(guest_nice)); | |
df8106db AD |
81 | for_each_online_cpu(i) { |
82 | ||
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; | |
e1c80530 | 88 | idle = cputime64_add(idle, arch_idle_time(i)); |
df8106db AD |
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; | |
ce0e7b28 | 94 | guest_nice = kstat_cpu(i).cpustat.guest_nice; |
df8106db | 95 | seq_printf(p, |
ce0e7b28 RO |
96 | "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu " |
97 | "%llu\n", | |
df8106db AD |
98 | i, |
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), | |
ce0e7b28 RO |
107 | (unsigned long long)cputime64_to_clock_t(guest), |
108 | (unsigned long long)cputime64_to_clock_t(guest_nice)); | |
df8106db AD |
109 | } |
110 | seq_printf(p, "intr %llu", (unsigned long long)sum); | |
111 | ||
112 | /* sum again ? it could be updated? */ | |
240d367b | 113 | for_each_irq_nr(j) { |
df8106db | 114 | per_irq_sum = 0; |
240d367b YL |
115 | for_each_possible_cpu(i) |
116 | per_irq_sum += kstat_irqs_cpu(j, i); | |
df8106db AD |
117 | |
118 | seq_printf(p, " %u", per_irq_sum); | |
119 | } | |
120 | ||
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()); | |
132 | ||
d3d64df2 KK |
133 | seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq); |
134 | ||
135 | for (i = 0; i < NR_SOFTIRQS; i++) | |
136 | seq_printf(p, " %u", per_softirq_sums[i]); | |
137 | seq_printf(p, "\n"); | |
138 | ||
df8106db AD |
139 | return 0; |
140 | } | |
141 | ||
142 | static int stat_open(struct inode *inode, struct file *file) | |
143 | { | |
144 | unsigned size = 4096 * (1 + num_possible_cpus() / 32); | |
145 | char *buf; | |
146 | struct seq_file *m; | |
147 | int res; | |
148 | ||
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; | |
155 | ||
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; | |
164 | } | |
165 | ||
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, | |
171 | }; | |
172 | ||
173 | static int __init proc_stat_init(void) | |
174 | { | |
175 | proc_create("stat", 0, NULL, &proc_stat_operations); | |
176 | return 0; | |
177 | } | |
178 | module_init(proc_stat_init); |