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 u64
get_idle_time(int cpu
)
27 u64 idle
, idle_time
= get_cpu_idle_time_us(cpu
, NULL
);
29 if (idle_time
== -1ULL) {
30 /* !NO_HZ so we can rely on cpustat.idle */
31 idle
= kcpustat_cpu(cpu
).cpustat
[CPUTIME_IDLE
];
32 idle
+= arch_idle_time(cpu
);
34 idle
= usecs_to_cputime64(idle_time
);
39 static u64
get_iowait_time(int cpu
)
41 u64 iowait
, iowait_time
= get_cpu_iowait_time_us(cpu
, NULL
);
43 if (iowait_time
== -1ULL)
44 /* !NO_HZ so we can rely on cpustat.iowait */
45 iowait
= kcpustat_cpu(cpu
).cpustat
[CPUTIME_IOWAIT
];
47 iowait
= usecs_to_cputime64(iowait_time
);
52 static int show_stat(struct seq_file
*p
, void *v
)
56 u64 user
, nice
, system
, idle
, iowait
, irq
, softirq
, steal
;
57 u64 guest
, guest_nice
;
60 unsigned int per_softirq_sums
[NR_SOFTIRQS
] = {0};
61 struct timespec boottime
;
63 user
= nice
= system
= idle
= iowait
=
64 irq
= softirq
= steal
= 0;
65 guest
= guest_nice
= 0;
66 getboottime(&boottime
);
67 jif
= boottime
.tv_sec
;
69 for_each_possible_cpu(i
) {
70 user
+= kcpustat_cpu(i
).cpustat
[CPUTIME_USER
];
71 nice
+= kcpustat_cpu(i
).cpustat
[CPUTIME_NICE
];
72 system
+= kcpustat_cpu(i
).cpustat
[CPUTIME_SYSTEM
];
73 idle
+= get_idle_time(i
);
74 iowait
+= get_iowait_time(i
);
75 irq
+= kcpustat_cpu(i
).cpustat
[CPUTIME_IRQ
];
76 softirq
+= kcpustat_cpu(i
).cpustat
[CPUTIME_SOFTIRQ
];
77 steal
+= kcpustat_cpu(i
).cpustat
[CPUTIME_STEAL
];
78 guest
+= kcpustat_cpu(i
).cpustat
[CPUTIME_GUEST
];
79 guest_nice
+= kcpustat_cpu(i
).cpustat
[CPUTIME_GUEST_NICE
];
81 for (j
= 0; j
< NR_SOFTIRQS
; j
++) {
82 unsigned int softirq_stat
= kstat_softirqs_cpu(j
, i
);
84 per_softirq_sums
[j
] += softirq_stat
;
85 sum_softirq
+= softirq_stat
;
88 sum
+= arch_irq_stat();
90 seq_printf(p
, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu "
92 (unsigned long long)cputime64_to_clock_t(user
),
93 (unsigned long long)cputime64_to_clock_t(nice
),
94 (unsigned long long)cputime64_to_clock_t(system
),
95 (unsigned long long)cputime64_to_clock_t(idle
),
96 (unsigned long long)cputime64_to_clock_t(iowait
),
97 (unsigned long long)cputime64_to_clock_t(irq
),
98 (unsigned long long)cputime64_to_clock_t(softirq
),
99 (unsigned long long)cputime64_to_clock_t(steal
),
100 (unsigned long long)cputime64_to_clock_t(guest
),
101 (unsigned long long)cputime64_to_clock_t(guest_nice
));
102 for_each_online_cpu(i
) {
103 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
104 user
= kcpustat_cpu(i
).cpustat
[CPUTIME_USER
];
105 nice
= kcpustat_cpu(i
).cpustat
[CPUTIME_NICE
];
106 system
= kcpustat_cpu(i
).cpustat
[CPUTIME_SYSTEM
];
107 idle
= get_idle_time(i
);
108 iowait
= get_iowait_time(i
);
109 irq
= kcpustat_cpu(i
).cpustat
[CPUTIME_IRQ
];
110 softirq
= kcpustat_cpu(i
).cpustat
[CPUTIME_SOFTIRQ
];
111 steal
= kcpustat_cpu(i
).cpustat
[CPUTIME_STEAL
];
112 guest
= kcpustat_cpu(i
).cpustat
[CPUTIME_GUEST
];
113 guest_nice
= kcpustat_cpu(i
).cpustat
[CPUTIME_GUEST_NICE
];
115 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu "
118 (unsigned long long)cputime64_to_clock_t(user
),
119 (unsigned long long)cputime64_to_clock_t(nice
),
120 (unsigned long long)cputime64_to_clock_t(system
),
121 (unsigned long long)cputime64_to_clock_t(idle
),
122 (unsigned long long)cputime64_to_clock_t(iowait
),
123 (unsigned long long)cputime64_to_clock_t(irq
),
124 (unsigned long long)cputime64_to_clock_t(softirq
),
125 (unsigned long long)cputime64_to_clock_t(steal
),
126 (unsigned long long)cputime64_to_clock_t(guest
),
127 (unsigned long long)cputime64_to_clock_t(guest_nice
));
129 seq_printf(p
, "intr %llu", (unsigned long long)sum
);
131 /* sum again ? it could be updated? */
133 seq_printf(p
, " %u", kstat_irqs(j
));
139 "procs_running %lu\n"
140 "procs_blocked %lu\n",
141 nr_context_switches(),
147 seq_printf(p
, "softirq %llu", (unsigned long long)sum_softirq
);
149 for (i
= 0; i
< NR_SOFTIRQS
; i
++)
150 seq_printf(p
, " %u", per_softirq_sums
[i
]);
156 static int stat_open(struct inode
*inode
, struct file
*file
)
158 unsigned size
= 4096 * (1 + num_possible_cpus() / 32);
163 /* don't ask for more than the kmalloc() max size */
164 if (size
> KMALLOC_MAX_SIZE
)
165 size
= KMALLOC_MAX_SIZE
;
166 buf
= kmalloc(size
, GFP_KERNEL
);
170 res
= single_open(file
, show_stat
, NULL
);
172 m
= file
->private_data
;
180 static const struct file_operations proc_stat_operations
= {
184 .release
= single_release
,
187 static int __init
proc_stat_init(void)
189 proc_create("stat", 0, NULL
, &proc_stat_operations
);
192 module_init(proc_stat_init
);