1 #include <linux/cpumask.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>
13 #include <linux/tick.h>
15 #ifndef arch_irq_stat_cpu
16 #define arch_irq_stat_cpu(cpu) 0
19 #define arch_irq_stat() 0
21 #ifndef arch_idle_time
22 #define arch_idle_time(cpu) 0
25 static cputime64_t get_idle_time(int cpu)
27 u64 idle_time = get_cpu_idle_time_us(cpu, NULL);
30 if (idle_time == -1ULL) {
31 /* !NO_HZ so we can rely on cpustat.idle */
32 idle = kstat_cpu(cpu).cpustat.idle;
33 idle = cputime64_add(idle, arch_idle_time(cpu));
35 idle = usecs_to_cputime(idle_time);
40 static cputime64_t get_iowait_time(int cpu)
42 u64 iowait_time = get_cpu_iowait_time_us(cpu, NULL);
45 if (iowait_time == -1ULL)
46 /* !NO_HZ so we can rely on cpustat.iowait */
47 iowait = kstat_cpu(cpu).cpustat.iowait;
49 iowait = usecs_to_cputime(iowait_time);
54 static int show_stat(struct seq_file *p, void *v)
58 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
59 cputime64_t guest, guest_nice;
62 unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
63 struct timespec boottime;
65 user = nice = system = idle = iowait =
66 irq = softirq = steal = cputime64_zero;
67 guest = guest_nice = cputime64_zero;
68 getboottime(&boottime);
69 jif = boottime.tv_sec;
71 for_each_possible_cpu(i) {
72 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
73 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
74 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
75 idle = cputime64_add(idle, get_idle_time(i));
76 iowait = cputime64_add(iowait, get_iowait_time(i));
77 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
78 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
79 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
80 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
81 guest_nice = cputime64_add(guest_nice,
82 kstat_cpu(i).cpustat.guest_nice);
83 sum += kstat_cpu_irqs_sum(i);
84 sum += arch_irq_stat_cpu(i);
86 for (j = 0; j < NR_SOFTIRQS; j++) {
87 unsigned int softirq_stat = kstat_softirqs_cpu(j, i);
89 per_softirq_sums[j] += softirq_stat;
90 sum_softirq += softirq_stat;
93 sum += arch_irq_stat();
95 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu "
97 (unsigned long long)cputime64_to_clock_t(user),
98 (unsigned long long)cputime64_to_clock_t(nice),
99 (unsigned long long)cputime64_to_clock_t(system),
100 (unsigned long long)cputime64_to_clock_t(idle),
101 (unsigned long long)cputime64_to_clock_t(iowait),
102 (unsigned long long)cputime64_to_clock_t(irq),
103 (unsigned long long)cputime64_to_clock_t(softirq),
104 (unsigned long long)cputime64_to_clock_t(steal),
105 (unsigned long long)cputime64_to_clock_t(guest),
106 (unsigned long long)cputime64_to_clock_t(guest_nice));
107 for_each_online_cpu(i) {
108 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
109 user = kstat_cpu(i).cpustat.user;
110 nice = kstat_cpu(i).cpustat.nice;
111 system = kstat_cpu(i).cpustat.system;
112 idle = get_idle_time(i);
113 iowait = get_iowait_time(i);
114 irq = kstat_cpu(i).cpustat.irq;
115 softirq = kstat_cpu(i).cpustat.softirq;
116 steal = kstat_cpu(i).cpustat.steal;
117 guest = kstat_cpu(i).cpustat.guest;
118 guest_nice = kstat_cpu(i).cpustat.guest_nice;
120 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu "
123 (unsigned long long)cputime64_to_clock_t(user),
124 (unsigned long long)cputime64_to_clock_t(nice),
125 (unsigned long long)cputime64_to_clock_t(system),
126 (unsigned long long)cputime64_to_clock_t(idle),
127 (unsigned long long)cputime64_to_clock_t(iowait),
128 (unsigned long long)cputime64_to_clock_t(irq),
129 (unsigned long long)cputime64_to_clock_t(softirq),
130 (unsigned long long)cputime64_to_clock_t(steal),
131 (unsigned long long)cputime64_to_clock_t(guest),
132 (unsigned long long)cputime64_to_clock_t(guest_nice));
134 seq_printf(p, "intr %llu", (unsigned long long)sum);
136 /* sum again ? it could be updated? */
138 seq_printf(p, " %u", kstat_irqs(j));
144 "procs_running %lu\n"
145 "procs_blocked %lu\n",
146 nr_context_switches(),
152 seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq);
154 for (i = 0; i < NR_SOFTIRQS; i++)
155 seq_printf(p, " %u", per_softirq_sums[i]);
161 static int stat_open(struct inode *inode, struct file *file)
163 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
168 /* don't ask for more than the kmalloc() max size */
169 if (size > KMALLOC_MAX_SIZE)
170 size = KMALLOC_MAX_SIZE;
171 buf = kmalloc(size, GFP_KERNEL);
175 res = single_open(file, show_stat, NULL);
177 m = file->private_data;
185 static const struct file_operations proc_stat_operations = {
189 .release = single_release,
192 static int __init proc_stat_init(void)
194 proc_create("stat", 0, NULL, &proc_stat_operations);
197 module_init(proc_stat_init);