| #include <linux/cpumask.h> |
| #include <linux/fs.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel_stat.h> |
| #include <linux/proc_fs.h> |
| #include <linux/sched.h> |
| #include <linux/seq_file.h> |
| #include <linux/slab.h> |
| #include <linux/time.h> |
| #include <linux/irqnr.h> |
| #include <asm/cputime.h> |
| #include <linux/tick.h> |
| |
| #ifndef arch_irq_stat_cpu |
| #define arch_irq_stat_cpu(cpu) 0 |
| #endif |
| #ifndef arch_irq_stat |
| #define arch_irq_stat() 0 |
| #endif |
| #ifndef arch_idle_time |
| #define arch_idle_time(cpu) 0 |
| #endif |
| |
| static u64 get_idle_time(int cpu) |
| { |
| u64 idle, idle_time = get_cpu_idle_time_us(cpu, NULL); |
| |
| if (idle_time == -1ULL) { |
| /* !NO_HZ so we can rely on cpustat.idle */ |
| idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE]; |
| idle += arch_idle_time(cpu); |
| } else |
| idle = usecs_to_cputime64(idle_time); |
| |
| return idle; |
| } |
| |
| static u64 get_iowait_time(int cpu) |
| { |
| u64 iowait, iowait_time = get_cpu_iowait_time_us(cpu, NULL); |
| |
| if (iowait_time == -1ULL) |
| /* !NO_HZ so we can rely on cpustat.iowait */ |
| iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT]; |
| else |
| iowait = usecs_to_cputime64(iowait_time); |
| |
| return iowait; |
| } |
| |
| static int show_stat(struct seq_file *p, void *v) |
| { |
| int i, j; |
| unsigned long jif; |
| u64 user, nice, system, idle, iowait, irq, softirq, steal; |
| u64 guest, guest_nice; |
| u64 sum = 0; |
| u64 sum_softirq = 0; |
| unsigned int per_softirq_sums[NR_SOFTIRQS] = {0}; |
| struct timespec boottime; |
| |
| user = nice = system = idle = iowait = |
| irq = softirq = steal = 0; |
| guest = guest_nice = 0; |
| getboottime(&boottime); |
| jif = boottime.tv_sec; |
| |
| for_each_possible_cpu(i) { |
| user += kcpustat_cpu(i).cpustat[CPUTIME_USER]; |
| nice += kcpustat_cpu(i).cpustat[CPUTIME_NICE]; |
| system += kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]; |
| idle += get_idle_time(i); |
| iowait += get_iowait_time(i); |
| irq += kcpustat_cpu(i).cpustat[CPUTIME_IRQ]; |
| softirq += kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]; |
| steal += kcpustat_cpu(i).cpustat[CPUTIME_STEAL]; |
| guest += kcpustat_cpu(i).cpustat[CPUTIME_GUEST]; |
| guest_nice += kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE]; |
| sum += kstat_cpu_irqs_sum(i); |
| sum += arch_irq_stat_cpu(i); |
| |
| for (j = 0; j < NR_SOFTIRQS; j++) { |
| unsigned int softirq_stat = kstat_softirqs_cpu(j, i); |
| |
| per_softirq_sums[j] += softirq_stat; |
| sum_softirq += softirq_stat; |
| } |
| } |
| sum += arch_irq_stat(); |
| |
| seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu " |
| "%llu\n", |
| (unsigned long long)cputime64_to_clock_t(user), |
| (unsigned long long)cputime64_to_clock_t(nice), |
| (unsigned long long)cputime64_to_clock_t(system), |
| (unsigned long long)cputime64_to_clock_t(idle), |
| (unsigned long long)cputime64_to_clock_t(iowait), |
| (unsigned long long)cputime64_to_clock_t(irq), |
| (unsigned long long)cputime64_to_clock_t(softirq), |
| (unsigned long long)cputime64_to_clock_t(steal), |
| (unsigned long long)cputime64_to_clock_t(guest), |
| (unsigned long long)cputime64_to_clock_t(guest_nice)); |
| for_each_online_cpu(i) { |
| /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ |
| user = kcpustat_cpu(i).cpustat[CPUTIME_USER]; |
| nice = kcpustat_cpu(i).cpustat[CPUTIME_NICE]; |
| system = kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]; |
| idle = get_idle_time(i); |
| iowait = get_iowait_time(i); |
| irq = kcpustat_cpu(i).cpustat[CPUTIME_IRQ]; |
| softirq = kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]; |
| steal = kcpustat_cpu(i).cpustat[CPUTIME_STEAL]; |
| guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST]; |
| guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE]; |
| seq_printf(p, |
| "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu " |
| "%llu\n", |
| i, |
| (unsigned long long)cputime64_to_clock_t(user), |
| (unsigned long long)cputime64_to_clock_t(nice), |
| (unsigned long long)cputime64_to_clock_t(system), |
| (unsigned long long)cputime64_to_clock_t(idle), |
| (unsigned long long)cputime64_to_clock_t(iowait), |
| (unsigned long long)cputime64_to_clock_t(irq), |
| (unsigned long long)cputime64_to_clock_t(softirq), |
| (unsigned long long)cputime64_to_clock_t(steal), |
| (unsigned long long)cputime64_to_clock_t(guest), |
| (unsigned long long)cputime64_to_clock_t(guest_nice)); |
| } |
| seq_printf(p, "intr %llu", (unsigned long long)sum); |
| |
| /* sum again ? it could be updated? */ |
| for_each_irq_nr(j) |
| seq_printf(p, " %u", kstat_irqs(j)); |
| |
| seq_printf(p, |
| "\nctxt %llu\n" |
| "btime %lu\n" |
| "processes %lu\n" |
| "procs_running %lu\n" |
| "procs_blocked %lu\n", |
| nr_context_switches(), |
| (unsigned long)jif, |
| total_forks, |
| nr_running(), |
| nr_iowait()); |
| |
| seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq); |
| |
| for (i = 0; i < NR_SOFTIRQS; i++) |
| seq_printf(p, " %u", per_softirq_sums[i]); |
| seq_putc(p, '\n'); |
| |
| return 0; |
| } |
| |
| static int stat_open(struct inode *inode, struct file *file) |
| { |
| unsigned size = 1024 + 128 * num_possible_cpus(); |
| char *buf; |
| struct seq_file *m; |
| int res; |
| |
| /* minimum size to display an interrupt count : 2 bytes */ |
| size += 2 * nr_irqs; |
| |
| /* don't ask for more than the kmalloc() max size */ |
| if (size > KMALLOC_MAX_SIZE) |
| size = KMALLOC_MAX_SIZE; |
| buf = kmalloc(size, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| res = single_open(file, show_stat, NULL); |
| if (!res) { |
| m = file->private_data; |
| m->buf = buf; |
| m->size = ksize(buf); |
| } else |
| kfree(buf); |
| return res; |
| } |
| |
| static const struct file_operations proc_stat_operations = { |
| .open = stat_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static int __init proc_stat_init(void) |
| { |
| proc_create("stat", 0, NULL, &proc_stat_operations); |
| return 0; |
| } |
| module_init(proc_stat_init); |