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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> | |
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 | |
20 | ||
21 | static int show_stat(struct seq_file *p, void *v) | |
22 | { | |
23 | int i, j; | |
24 | unsigned long jif; | |
25 | cputime64_t user, nice, system, idle, iowait, irq, softirq, steal; | |
26 | cputime64_t guest; | |
27 | u64 sum = 0; | |
28 | struct timespec boottime; | |
29 | unsigned int per_irq_sum; | |
30 | ||
31 | user = nice = system = idle = iowait = | |
32 | irq = softirq = steal = cputime64_zero; | |
33 | guest = cputime64_zero; | |
34 | getboottime(&boottime); | |
35 | jif = boottime.tv_sec; | |
36 | ||
37 | for_each_possible_cpu(i) { | |
38 | user = cputime64_add(user, kstat_cpu(i).cpustat.user); | |
39 | nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); | |
40 | system = cputime64_add(system, kstat_cpu(i).cpustat.system); | |
41 | idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); | |
42 | iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); | |
43 | irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); | |
44 | softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); | |
45 | steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); | |
46 | guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest); | |
240d367b YL |
47 | for_each_irq_nr(j) { |
48 | #ifdef CONFIG_SPARSE_IRQ | |
13bd41bc | 49 | if (!irq_to_desc(j)) |
0b8f1efa | 50 | continue; |
240d367b | 51 | #endif |
df8106db | 52 | sum += kstat_irqs_cpu(j, i); |
0b8f1efa | 53 | } |
df8106db AD |
54 | sum += arch_irq_stat_cpu(i); |
55 | } | |
56 | sum += arch_irq_stat(); | |
57 | ||
58 | seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", | |
59 | (unsigned long long)cputime64_to_clock_t(user), | |
60 | (unsigned long long)cputime64_to_clock_t(nice), | |
61 | (unsigned long long)cputime64_to_clock_t(system), | |
62 | (unsigned long long)cputime64_to_clock_t(idle), | |
63 | (unsigned long long)cputime64_to_clock_t(iowait), | |
64 | (unsigned long long)cputime64_to_clock_t(irq), | |
65 | (unsigned long long)cputime64_to_clock_t(softirq), | |
66 | (unsigned long long)cputime64_to_clock_t(steal), | |
67 | (unsigned long long)cputime64_to_clock_t(guest)); | |
68 | for_each_online_cpu(i) { | |
69 | ||
70 | /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ | |
71 | user = kstat_cpu(i).cpustat.user; | |
72 | nice = kstat_cpu(i).cpustat.nice; | |
73 | system = kstat_cpu(i).cpustat.system; | |
74 | idle = kstat_cpu(i).cpustat.idle; | |
75 | iowait = kstat_cpu(i).cpustat.iowait; | |
76 | irq = kstat_cpu(i).cpustat.irq; | |
77 | softirq = kstat_cpu(i).cpustat.softirq; | |
78 | steal = kstat_cpu(i).cpustat.steal; | |
79 | guest = kstat_cpu(i).cpustat.guest; | |
80 | seq_printf(p, | |
81 | "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", | |
82 | i, | |
83 | (unsigned long long)cputime64_to_clock_t(user), | |
84 | (unsigned long long)cputime64_to_clock_t(nice), | |
85 | (unsigned long long)cputime64_to_clock_t(system), | |
86 | (unsigned long long)cputime64_to_clock_t(idle), | |
87 | (unsigned long long)cputime64_to_clock_t(iowait), | |
88 | (unsigned long long)cputime64_to_clock_t(irq), | |
89 | (unsigned long long)cputime64_to_clock_t(softirq), | |
90 | (unsigned long long)cputime64_to_clock_t(steal), | |
91 | (unsigned long long)cputime64_to_clock_t(guest)); | |
92 | } | |
93 | seq_printf(p, "intr %llu", (unsigned long long)sum); | |
94 | ||
95 | /* sum again ? it could be updated? */ | |
240d367b | 96 | for_each_irq_nr(j) { |
df8106db | 97 | per_irq_sum = 0; |
240d367b | 98 | #ifdef CONFIG_SPARSE_IRQ |
13bd41bc | 99 | if (!irq_to_desc(j)) { |
240d367b YL |
100 | seq_printf(p, " %u", per_irq_sum); |
101 | continue; | |
0b8f1efa | 102 | } |
240d367b YL |
103 | #endif |
104 | for_each_possible_cpu(i) | |
105 | per_irq_sum += kstat_irqs_cpu(j, i); | |
df8106db AD |
106 | |
107 | seq_printf(p, " %u", per_irq_sum); | |
108 | } | |
109 | ||
110 | seq_printf(p, | |
111 | "\nctxt %llu\n" | |
112 | "btime %lu\n" | |
113 | "processes %lu\n" | |
114 | "procs_running %lu\n" | |
115 | "procs_blocked %lu\n", | |
116 | nr_context_switches(), | |
117 | (unsigned long)jif, | |
118 | total_forks, | |
119 | nr_running(), | |
120 | nr_iowait()); | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | static int stat_open(struct inode *inode, struct file *file) | |
126 | { | |
127 | unsigned size = 4096 * (1 + num_possible_cpus() / 32); | |
128 | char *buf; | |
129 | struct seq_file *m; | |
130 | int res; | |
131 | ||
132 | /* don't ask for more than the kmalloc() max size, currently 128 KB */ | |
133 | if (size > 128 * 1024) | |
134 | size = 128 * 1024; | |
135 | buf = kmalloc(size, GFP_KERNEL); | |
136 | if (!buf) | |
137 | return -ENOMEM; | |
138 | ||
139 | res = single_open(file, show_stat, NULL); | |
140 | if (!res) { | |
141 | m = file->private_data; | |
142 | m->buf = buf; | |
143 | m->size = size; | |
144 | } else | |
145 | kfree(buf); | |
146 | return res; | |
147 | } | |
148 | ||
149 | static const struct file_operations proc_stat_operations = { | |
150 | .open = stat_open, | |
151 | .read = seq_read, | |
152 | .llseek = seq_lseek, | |
153 | .release = single_release, | |
154 | }; | |
155 | ||
156 | static int __init proc_stat_init(void) | |
157 | { | |
158 | proc_create("stat", 0, NULL, &proc_stat_operations); | |
159 | return 0; | |
160 | } | |
161 | module_init(proc_stat_init); |