Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 1 | #include <linux/cpumask.h> |
| 2 | #include <linux/fs.h> |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 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> |
KOSAKI Motohiro | 26ddd8d | 2008-12-26 14:24:10 +0900 | [diff] [blame] | 11 | #include <linux/irqnr.h> |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 12 | #include <asm/cputime.h> |
Michal Hocko | a25cac5 | 2011-08-24 09:40:25 +0200 | [diff] [blame] | 13 | #include <linux/tick.h> |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 14 | |
| 15 | #ifndef arch_irq_stat_cpu |
| 16 | #define arch_irq_stat_cpu(cpu) 0 |
| 17 | #endif |
| 18 | #ifndef arch_irq_stat |
| 19 | #define arch_irq_stat() 0 |
| 20 | #endif |
Martin Schwidefsky | cb85a6e | 2012-03-30 12:23:08 +0200 | [diff] [blame] | 21 | |
| 22 | #ifdef arch_idle_time |
| 23 | |
| 24 | static cputime64_t get_idle_time(int cpu) |
| 25 | { |
| 26 | cputime64_t idle; |
| 27 | |
| 28 | idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE]; |
| 29 | if (cpu_online(cpu) && !nr_iowait_cpu(cpu)) |
| 30 | idle += arch_idle_time(cpu); |
| 31 | return idle; |
| 32 | } |
| 33 | |
| 34 | static cputime64_t get_iowait_time(int cpu) |
| 35 | { |
| 36 | cputime64_t iowait; |
| 37 | |
| 38 | iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT]; |
| 39 | if (cpu_online(cpu) && nr_iowait_cpu(cpu)) |
| 40 | iowait += arch_idle_time(cpu); |
| 41 | return iowait; |
| 42 | } |
| 43 | |
| 44 | #else |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 45 | |
Glauber Costa | 3292beb | 2011-11-28 14:45:17 -0200 | [diff] [blame] | 46 | static u64 get_idle_time(int cpu) |
Michal Hocko | a25cac5 | 2011-08-24 09:40:25 +0200 | [diff] [blame] | 47 | { |
Michal Hocko | 7386cdb | 2012-10-10 11:51:09 +0530 | [diff] [blame] | 48 | u64 idle, idle_time = -1ULL; |
| 49 | |
| 50 | if (cpu_online(cpu)) |
| 51 | idle_time = get_cpu_idle_time_us(cpu, NULL); |
Michal Hocko | a25cac5 | 2011-08-24 09:40:25 +0200 | [diff] [blame] | 52 | |
Martin Schwidefsky | cb85a6e | 2012-03-30 12:23:08 +0200 | [diff] [blame] | 53 | if (idle_time == -1ULL) |
Michal Hocko | 7386cdb | 2012-10-10 11:51:09 +0530 | [diff] [blame] | 54 | /* !NO_HZ or cpu offline so we can rely on cpustat.idle */ |
Glauber Costa | 3292beb | 2011-11-28 14:45:17 -0200 | [diff] [blame] | 55 | idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE]; |
Martin Schwidefsky | cb85a6e | 2012-03-30 12:23:08 +0200 | [diff] [blame] | 56 | else |
Andreas Schwab | 3484563 | 2011-12-28 15:57:15 -0800 | [diff] [blame] | 57 | idle = usecs_to_cputime64(idle_time); |
Michal Hocko | a25cac5 | 2011-08-24 09:40:25 +0200 | [diff] [blame] | 58 | |
| 59 | return idle; |
| 60 | } |
| 61 | |
Glauber Costa | 3292beb | 2011-11-28 14:45:17 -0200 | [diff] [blame] | 62 | static u64 get_iowait_time(int cpu) |
Michal Hocko | a25cac5 | 2011-08-24 09:40:25 +0200 | [diff] [blame] | 63 | { |
Michal Hocko | 7386cdb | 2012-10-10 11:51:09 +0530 | [diff] [blame] | 64 | u64 iowait, iowait_time = -1ULL; |
| 65 | |
| 66 | if (cpu_online(cpu)) |
| 67 | iowait_time = get_cpu_iowait_time_us(cpu, NULL); |
Michal Hocko | a25cac5 | 2011-08-24 09:40:25 +0200 | [diff] [blame] | 68 | |
| 69 | if (iowait_time == -1ULL) |
Michal Hocko | 7386cdb | 2012-10-10 11:51:09 +0530 | [diff] [blame] | 70 | /* !NO_HZ or cpu offline so we can rely on cpustat.iowait */ |
Glauber Costa | 3292beb | 2011-11-28 14:45:17 -0200 | [diff] [blame] | 71 | iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT]; |
Michal Hocko | a25cac5 | 2011-08-24 09:40:25 +0200 | [diff] [blame] | 72 | else |
Andreas Schwab | 3484563 | 2011-12-28 15:57:15 -0800 | [diff] [blame] | 73 | iowait = usecs_to_cputime64(iowait_time); |
Michal Hocko | a25cac5 | 2011-08-24 09:40:25 +0200 | [diff] [blame] | 74 | |
| 75 | return iowait; |
| 76 | } |
| 77 | |
Martin Schwidefsky | cb85a6e | 2012-03-30 12:23:08 +0200 | [diff] [blame] | 78 | #endif |
| 79 | |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 80 | static int show_stat(struct seq_file *p, void *v) |
| 81 | { |
| 82 | int i, j; |
| 83 | unsigned long jif; |
Glauber Costa | 3292beb | 2011-11-28 14:45:17 -0200 | [diff] [blame] | 84 | u64 user, nice, system, idle, iowait, irq, softirq, steal; |
| 85 | u64 guest, guest_nice; |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 86 | u64 sum = 0; |
Keika Kobayashi | d3d64df | 2009-06-17 16:25:55 -0700 | [diff] [blame] | 87 | u64 sum_softirq = 0; |
| 88 | unsigned int per_softirq_sums[NR_SOFTIRQS] = {0}; |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 89 | struct timespec boottime; |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 90 | |
| 91 | user = nice = system = idle = iowait = |
Glauber Costa | 3292beb | 2011-11-28 14:45:17 -0200 | [diff] [blame] | 92 | irq = softirq = steal = 0; |
| 93 | guest = guest_nice = 0; |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 94 | getboottime(&boottime); |
| 95 | jif = boottime.tv_sec; |
| 96 | |
| 97 | for_each_possible_cpu(i) { |
Glauber Costa | 3292beb | 2011-11-28 14:45:17 -0200 | [diff] [blame] | 98 | user += kcpustat_cpu(i).cpustat[CPUTIME_USER]; |
| 99 | nice += kcpustat_cpu(i).cpustat[CPUTIME_NICE]; |
| 100 | system += kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]; |
| 101 | idle += get_idle_time(i); |
| 102 | iowait += get_iowait_time(i); |
| 103 | irq += kcpustat_cpu(i).cpustat[CPUTIME_IRQ]; |
| 104 | softirq += kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]; |
| 105 | steal += kcpustat_cpu(i).cpustat[CPUTIME_STEAL]; |
| 106 | guest += kcpustat_cpu(i).cpustat[CPUTIME_GUEST]; |
| 107 | guest_nice += kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE]; |
Russell King | f7e6746 | 2012-01-14 00:01:01 +0000 | [diff] [blame] | 108 | sum += kstat_cpu_irqs_sum(i); |
| 109 | sum += arch_irq_stat_cpu(i); |
Keika Kobayashi | d3d64df | 2009-06-17 16:25:55 -0700 | [diff] [blame] | 110 | |
| 111 | for (j = 0; j < NR_SOFTIRQS; j++) { |
| 112 | unsigned int softirq_stat = kstat_softirqs_cpu(j, i); |
| 113 | |
| 114 | per_softirq_sums[j] += softirq_stat; |
| 115 | sum_softirq += softirq_stat; |
| 116 | } |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 117 | } |
| 118 | sum += arch_irq_stat(); |
| 119 | |
KAMEZAWA Hiroyuki | 1ac101a | 2012-03-23 15:02:54 -0700 | [diff] [blame] | 120 | seq_puts(p, "cpu "); |
| 121 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user)); |
| 122 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice)); |
| 123 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system)); |
| 124 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle)); |
| 125 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait)); |
| 126 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq)); |
| 127 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq)); |
| 128 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal)); |
| 129 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest)); |
| 130 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice)); |
| 131 | seq_putc(p, '\n'); |
| 132 | |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 133 | for_each_online_cpu(i) { |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 134 | /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ |
Glauber Costa | 3292beb | 2011-11-28 14:45:17 -0200 | [diff] [blame] | 135 | user = kcpustat_cpu(i).cpustat[CPUTIME_USER]; |
| 136 | nice = kcpustat_cpu(i).cpustat[CPUTIME_NICE]; |
| 137 | system = kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]; |
Michal Hocko | a25cac5 | 2011-08-24 09:40:25 +0200 | [diff] [blame] | 138 | idle = get_idle_time(i); |
| 139 | iowait = get_iowait_time(i); |
Glauber Costa | 3292beb | 2011-11-28 14:45:17 -0200 | [diff] [blame] | 140 | irq = kcpustat_cpu(i).cpustat[CPUTIME_IRQ]; |
| 141 | softirq = kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]; |
| 142 | steal = kcpustat_cpu(i).cpustat[CPUTIME_STEAL]; |
| 143 | guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST]; |
| 144 | guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE]; |
KAMEZAWA Hiroyuki | 1ac101a | 2012-03-23 15:02:54 -0700 | [diff] [blame] | 145 | seq_printf(p, "cpu%d", i); |
| 146 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user)); |
| 147 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice)); |
| 148 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system)); |
| 149 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle)); |
| 150 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait)); |
| 151 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq)); |
| 152 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq)); |
| 153 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal)); |
| 154 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest)); |
| 155 | seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice)); |
| 156 | seq_putc(p, '\n'); |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 157 | } |
| 158 | seq_printf(p, "intr %llu", (unsigned long long)sum); |
| 159 | |
| 160 | /* sum again ? it could be updated? */ |
KAMEZAWA Hiroyuki | 478735e3 | 2010-10-27 15:34:15 -0700 | [diff] [blame] | 161 | for_each_irq_nr(j) |
KAMEZAWA Hiroyuki | 1ac101a | 2012-03-23 15:02:54 -0700 | [diff] [blame] | 162 | seq_put_decimal_ull(p, ' ', kstat_irqs(j)); |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 163 | |
| 164 | seq_printf(p, |
| 165 | "\nctxt %llu\n" |
| 166 | "btime %lu\n" |
| 167 | "processes %lu\n" |
| 168 | "procs_running %lu\n" |
| 169 | "procs_blocked %lu\n", |
| 170 | nr_context_switches(), |
| 171 | (unsigned long)jif, |
| 172 | total_forks, |
| 173 | nr_running(), |
| 174 | nr_iowait()); |
| 175 | |
Keika Kobayashi | d3d64df | 2009-06-17 16:25:55 -0700 | [diff] [blame] | 176 | seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq); |
| 177 | |
| 178 | for (i = 0; i < NR_SOFTIRQS; i++) |
KAMEZAWA Hiroyuki | 1ac101a | 2012-03-23 15:02:54 -0700 | [diff] [blame] | 179 | seq_put_decimal_ull(p, ' ', per_softirq_sums[i]); |
Alexey Dobriyan | 9d6de12 | 2011-01-12 17:00:32 -0800 | [diff] [blame] | 180 | seq_putc(p, '\n'); |
Keika Kobayashi | d3d64df | 2009-06-17 16:25:55 -0700 | [diff] [blame] | 181 | |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | static int stat_open(struct inode *inode, struct file *file) |
| 186 | { |
Christoph Lameter | 9e5e8de | 2013-01-10 19:14:17 +0000 | [diff] [blame] | 187 | size_t size = 1024 + 128 * num_possible_cpus(); |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 188 | char *buf; |
| 189 | struct seq_file *m; |
| 190 | int res; |
| 191 | |
Eric Dumazet | 59a32e2 | 2012-03-23 15:02:53 -0700 | [diff] [blame] | 192 | /* minimum size to display an interrupt count : 2 bytes */ |
| 193 | size += 2 * nr_irqs; |
| 194 | |
Yuanhan Liu | a4dbf0e | 2011-05-26 16:25:51 -0700 | [diff] [blame] | 195 | /* don't ask for more than the kmalloc() max size */ |
| 196 | if (size > KMALLOC_MAX_SIZE) |
| 197 | size = KMALLOC_MAX_SIZE; |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 198 | buf = kmalloc(size, GFP_KERNEL); |
| 199 | if (!buf) |
| 200 | return -ENOMEM; |
| 201 | |
| 202 | res = single_open(file, show_stat, NULL); |
| 203 | if (!res) { |
| 204 | m = file->private_data; |
| 205 | m->buf = buf; |
Eric Dumazet | 59a32e2 | 2012-03-23 15:02:53 -0700 | [diff] [blame] | 206 | m->size = ksize(buf); |
Alexey Dobriyan | df8106d | 2008-10-05 00:01:56 +0400 | [diff] [blame] | 207 | } else |
| 208 | kfree(buf); |
| 209 | return res; |
| 210 | } |
| 211 | |
| 212 | static const struct file_operations proc_stat_operations = { |
| 213 | .open = stat_open, |
| 214 | .read = seq_read, |
| 215 | .llseek = seq_lseek, |
| 216 | .release = single_release, |
| 217 | }; |
| 218 | |
| 219 | static int __init proc_stat_init(void) |
| 220 | { |
| 221 | proc_create("stat", 0, NULL, &proc_stat_operations); |
| 222 | return 0; |
| 223 | } |
Paul Gortmaker | abaf378 | 2014-01-23 15:55:45 -0800 | [diff] [blame] | 224 | fs_initcall(proc_stat_init); |