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
+= arch_idle_time(cpu
);
35 idle
= nsecs_to_jiffies64(1000 * 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
= nsecs_to_jiffies64(1000 * 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
= 0;
67 guest
= guest_nice
= 0;
68 getboottime(&boottime
);
69 jif
= boottime
.tv_sec
;
71 for_each_possible_cpu(i
) {
72 user
+= kstat_cpu(i
).cpustat
.user
;
73 nice
+= kstat_cpu(i
).cpustat
.nice
;
74 system
+= kstat_cpu(i
).cpustat
.system
;
75 idle
+= get_idle_time(i
);
76 iowait
+= get_iowait_time(i
);
77 irq
+= kstat_cpu(i
).cpustat
.irq
;
78 softirq
+= kstat_cpu(i
).cpustat
.softirq
;
79 steal
+= kstat_cpu(i
).cpustat
.steal
;
80 guest
+= kstat_cpu(i
).cpustat
.guest
;
81 guest_nice
+= kstat_cpu(i
).cpustat
.guest_nice
;
82 sum
+= kstat_cpu_irqs_sum(i
);
83 sum
+= arch_irq_stat_cpu(i
);
85 for (j
= 0; j
< NR_SOFTIRQS
; j
++) {
86 unsigned int softirq_stat
= kstat_softirqs_cpu(j
, i
);
88 per_softirq_sums
[j
] += softirq_stat
;
89 sum_softirq
+= softirq_stat
;
92 sum
+= arch_irq_stat();
94 seq_printf(p
, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu "
96 (unsigned long long)cputime64_to_clock_t(user
),
97 (unsigned long long)cputime64_to_clock_t(nice
),
98 (unsigned long long)cputime64_to_clock_t(system
),
99 (unsigned long long)cputime64_to_clock_t(idle
),
100 (unsigned long long)cputime64_to_clock_t(iowait
),
101 (unsigned long long)cputime64_to_clock_t(irq
),
102 (unsigned long long)cputime64_to_clock_t(softirq
),
103 (unsigned long long)cputime64_to_clock_t(steal
),
104 (unsigned long long)cputime64_to_clock_t(guest
),
105 (unsigned long long)cputime64_to_clock_t(guest_nice
));
106 for_each_online_cpu(i
) {
107 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
108 user
= kstat_cpu(i
).cpustat
.user
;
109 nice
= kstat_cpu(i
).cpustat
.nice
;
110 system
= kstat_cpu(i
).cpustat
.system
;
111 idle
= get_idle_time(i
);
112 iowait
= get_iowait_time(i
);
113 irq
= kstat_cpu(i
).cpustat
.irq
;
114 softirq
= kstat_cpu(i
).cpustat
.softirq
;
115 steal
= kstat_cpu(i
).cpustat
.steal
;
116 guest
= kstat_cpu(i
).cpustat
.guest
;
117 guest_nice
= kstat_cpu(i
).cpustat
.guest_nice
;
119 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu "
122 (unsigned long long)cputime64_to_clock_t(user
),
123 (unsigned long long)cputime64_to_clock_t(nice
),
124 (unsigned long long)cputime64_to_clock_t(system
),
125 (unsigned long long)cputime64_to_clock_t(idle
),
126 (unsigned long long)cputime64_to_clock_t(iowait
),
127 (unsigned long long)cputime64_to_clock_t(irq
),
128 (unsigned long long)cputime64_to_clock_t(softirq
),
129 (unsigned long long)cputime64_to_clock_t(steal
),
130 (unsigned long long)cputime64_to_clock_t(guest
),
131 (unsigned long long)cputime64_to_clock_t(guest_nice
));
133 seq_printf(p
, "intr %llu", (unsigned long long)sum
);
135 /* sum again ? it could be updated? */
137 seq_printf(p
, " %u", kstat_irqs(j
));
143 "procs_running %lu\n"
144 "procs_blocked %lu\n",
145 nr_context_switches(),
151 seq_printf(p
, "softirq %llu", (unsigned long long)sum_softirq
);
153 for (i
= 0; i
< NR_SOFTIRQS
; i
++)
154 seq_printf(p
, " %u", per_softirq_sums
[i
]);
160 static int stat_open(struct inode
*inode
, struct file
*file
)
162 unsigned size
= 4096 * (1 + num_possible_cpus() / 32);
167 /* don't ask for more than the kmalloc() max size */
168 if (size
> KMALLOC_MAX_SIZE
)
169 size
= KMALLOC_MAX_SIZE
;
170 buf
= kmalloc(size
, GFP_KERNEL
);
174 res
= single_open(file
, show_stat
, NULL
);
176 m
= file
->private_data
;
184 static const struct file_operations proc_stat_operations
= {
188 .release
= single_release
,
191 static int __init
proc_stat_init(void)
193 proc_create("stat", 0, NULL
, &proc_stat_operations
);
196 module_init(proc_stat_init
);