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