2008-10-04 20:01:56 +00:00
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#include <linux/cpumask.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel_stat.h>
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#include <linux/proc_fs.h>
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#include <linux/sched.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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2008-12-26 05:24:10 +00:00
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#include <linux/irqnr.h>
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2014-03-05 15:33:42 +00:00
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#include <linux/cputime.h>
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2011-08-24 07:40:25 +00:00
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#include <linux/tick.h>
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2008-10-04 20:01:56 +00:00
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#ifndef arch_irq_stat_cpu
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#define arch_irq_stat_cpu(cpu) 0
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#endif
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#ifndef arch_irq_stat
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#define arch_irq_stat() 0
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#endif
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2012-03-30 10:23:08 +00:00
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#ifdef arch_idle_time
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2017-01-31 03:09:19 +00:00
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static u64 get_idle_time(int cpu)
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2012-03-30 10:23:08 +00:00
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{
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2017-01-31 03:09:19 +00:00
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u64 idle;
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2012-03-30 10:23:08 +00:00
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idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
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if (cpu_online(cpu) && !nr_iowait_cpu(cpu))
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2017-01-31 03:09:19 +00:00
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idle += cputime_to_nsecs(arch_idle_time(cpu));
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2012-03-30 10:23:08 +00:00
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return idle;
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}
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2017-01-31 03:09:19 +00:00
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static u64 get_iowait_time(int cpu)
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2012-03-30 10:23:08 +00:00
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{
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2017-01-31 03:09:19 +00:00
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u64 iowait;
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2012-03-30 10:23:08 +00:00
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iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
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if (cpu_online(cpu) && nr_iowait_cpu(cpu))
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2017-01-31 03:09:19 +00:00
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iowait += cputime_to_nsecs(arch_idle_time(cpu));
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2012-03-30 10:23:08 +00:00
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return iowait;
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}
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#else
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2008-10-04 20:01:56 +00:00
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2011-11-28 16:45:17 +00:00
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static u64 get_idle_time(int cpu)
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2011-08-24 07:40:25 +00:00
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{
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2017-01-31 03:09:19 +00:00
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u64 idle, idle_usecs = -1ULL;
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2012-10-10 06:21:09 +00:00
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if (cpu_online(cpu))
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2017-01-31 03:09:19 +00:00
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idle_usecs = get_cpu_idle_time_us(cpu, NULL);
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2011-08-24 07:40:25 +00:00
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2017-01-31 03:09:19 +00:00
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if (idle_usecs == -1ULL)
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2012-10-10 06:21:09 +00:00
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/* !NO_HZ or cpu offline so we can rely on cpustat.idle */
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2011-11-28 16:45:17 +00:00
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idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
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2012-03-30 10:23:08 +00:00
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else
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2017-01-31 03:09:19 +00:00
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idle = idle_usecs * NSEC_PER_USEC;
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2011-08-24 07:40:25 +00:00
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return idle;
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}
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2011-11-28 16:45:17 +00:00
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static u64 get_iowait_time(int cpu)
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2011-08-24 07:40:25 +00:00
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{
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2017-01-31 03:09:19 +00:00
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u64 iowait, iowait_usecs = -1ULL;
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2012-10-10 06:21:09 +00:00
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if (cpu_online(cpu))
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2017-01-31 03:09:19 +00:00
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iowait_usecs = get_cpu_iowait_time_us(cpu, NULL);
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2011-08-24 07:40:25 +00:00
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2017-01-31 03:09:19 +00:00
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if (iowait_usecs == -1ULL)
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2012-10-10 06:21:09 +00:00
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/* !NO_HZ or cpu offline so we can rely on cpustat.iowait */
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2011-11-28 16:45:17 +00:00
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iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
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2011-08-24 07:40:25 +00:00
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else
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2017-01-31 03:09:19 +00:00
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iowait = iowait_usecs * NSEC_PER_USEC;
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2011-08-24 07:40:25 +00:00
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return iowait;
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}
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2012-03-30 10:23:08 +00:00
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#endif
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2008-10-04 20:01:56 +00:00
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static int show_stat(struct seq_file *p, void *v)
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{
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int i, j;
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2011-11-28 16:45:17 +00:00
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u64 user, nice, system, idle, iowait, irq, softirq, steal;
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u64 guest, guest_nice;
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2008-10-04 20:01:56 +00:00
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u64 sum = 0;
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2009-06-17 23:25:55 +00:00
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u64 sum_softirq = 0;
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unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
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2016-08-02 21:03:22 +00:00
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struct timespec64 boottime;
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2008-10-04 20:01:56 +00:00
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user = nice = system = idle = iowait =
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2011-11-28 16:45:17 +00:00
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irq = softirq = steal = 0;
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guest = guest_nice = 0;
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2016-08-02 21:03:22 +00:00
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getboottime64(&boottime);
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2008-10-04 20:01:56 +00:00
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for_each_possible_cpu(i) {
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2011-11-28 16:45:17 +00:00
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user += kcpustat_cpu(i).cpustat[CPUTIME_USER];
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nice += kcpustat_cpu(i).cpustat[CPUTIME_NICE];
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system += kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM];
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idle += get_idle_time(i);
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iowait += get_iowait_time(i);
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irq += kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
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softirq += kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ];
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steal += kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
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guest += kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
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guest_nice += kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
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2012-01-14 00:01:01 +00:00
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sum += kstat_cpu_irqs_sum(i);
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sum += arch_irq_stat_cpu(i);
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2009-06-17 23:25:55 +00:00
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for (j = 0; j < NR_SOFTIRQS; j++) {
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unsigned int softirq_stat = kstat_softirqs_cpu(j, i);
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per_softirq_sums[j] += softirq_stat;
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sum_softirq += softirq_stat;
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}
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2008-10-04 20:01:56 +00:00
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}
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sum += arch_irq_stat();
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2017-01-31 03:09:19 +00:00
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seq_put_decimal_ull(p, "cpu ", nsec_to_clock_t(user));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(nice));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(system));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(idle));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(iowait));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(irq));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(softirq));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(steal));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest_nice));
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2012-03-23 22:02:54 +00:00
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seq_putc(p, '\n');
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2008-10-04 20:01:56 +00:00
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for_each_online_cpu(i) {
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/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
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2011-11-28 16:45:17 +00:00
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user = kcpustat_cpu(i).cpustat[CPUTIME_USER];
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nice = kcpustat_cpu(i).cpustat[CPUTIME_NICE];
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system = kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM];
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2011-08-24 07:40:25 +00:00
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idle = get_idle_time(i);
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iowait = get_iowait_time(i);
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2011-11-28 16:45:17 +00:00
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irq = kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
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softirq = kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ];
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steal = kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
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guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
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guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
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2012-03-23 22:02:54 +00:00
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seq_printf(p, "cpu%d", i);
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2017-01-31 03:09:19 +00:00
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(user));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(nice));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(system));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(idle));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(iowait));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(irq));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(softirq));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(steal));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest));
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seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest_nice));
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2012-03-23 22:02:54 +00:00
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seq_putc(p, '\n');
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2008-10-04 20:01:56 +00:00
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}
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2016-10-08 00:02:20 +00:00
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seq_put_decimal_ull(p, "intr ", (unsigned long long)sum);
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2008-10-04 20:01:56 +00:00
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/* sum again ? it could be updated? */
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2010-10-27 22:34:15 +00:00
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for_each_irq_nr(j)
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2016-10-08 00:02:20 +00:00
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seq_put_decimal_ull(p, " ", kstat_irqs_usr(j));
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2008-10-04 20:01:56 +00:00
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seq_printf(p,
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"\nctxt %llu\n"
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2016-08-02 21:03:22 +00:00
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"btime %llu\n"
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2008-10-04 20:01:56 +00:00
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"processes %lu\n"
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"procs_running %lu\n"
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"procs_blocked %lu\n",
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nr_context_switches(),
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2016-08-02 21:03:22 +00:00
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(unsigned long long)boottime.tv_sec,
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2008-10-04 20:01:56 +00:00
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total_forks,
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nr_running(),
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nr_iowait());
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2016-10-08 00:02:20 +00:00
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seq_put_decimal_ull(p, "softirq ", (unsigned long long)sum_softirq);
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2009-06-17 23:25:55 +00:00
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for (i = 0; i < NR_SOFTIRQS; i++)
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2016-10-08 00:02:20 +00:00
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seq_put_decimal_ull(p, " ", per_softirq_sums[i]);
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2011-01-13 01:00:32 +00:00
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seq_putc(p, '\n');
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2009-06-17 23:25:55 +00:00
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2008-10-04 20:01:56 +00:00
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return 0;
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}
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static int stat_open(struct inode *inode, struct file *file)
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{
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2014-07-02 22:22:37 +00:00
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size_t size = 1024 + 128 * num_online_cpus();
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2008-10-04 20:01:56 +00:00
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2012-03-23 22:02:53 +00:00
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/* minimum size to display an interrupt count : 2 bytes */
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size += 2 * nr_irqs;
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2014-07-02 22:22:37 +00:00
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return single_open_size(file, show_stat, NULL, size);
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2008-10-04 20:01:56 +00:00
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}
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static const struct file_operations proc_stat_operations = {
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.open = stat_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int __init proc_stat_init(void)
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{
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proc_create("stat", 0, NULL, &proc_stat_operations);
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return 0;
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}
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2014-01-23 23:55:45 +00:00
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fs_initcall(proc_stat_init);
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