projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| df8106db AD |
1 | #include <linux/cpumask.h> |
| 2 | #include <linux/fs.h> | |
| 3 | #include <linux/gfp.h> | |
| 4 | #include <linux/init.h> | |
| 5 | #include <linux/interrupt.h> | |
| 6 | #include <linux/kernel_stat.h> | |
| 7 | #include <linux/proc_fs.h> | |
| 8 | #include <linux/sched.h> | |
| 9 | #include <linux/seq_file.h> | |
| 10 | #include <linux/slab.h> | |
| 11 | #include <linux/time.h> | |
| 12 | #include <asm/cputime.h> | |
| 13 | ||
| 14 | #ifndef arch_irq_stat_cpu | |
| 15 | #define arch_irq_stat_cpu(cpu) 0 | |
| 16 | #endif | |
| 17 | #ifndef arch_irq_stat | |
| 18 | #define arch_irq_stat() 0 | |
| 19 | #endif | |
| 20 | ||
| 21 | static int show_stat(struct seq_file *p, void *v) | |
| 22 | { | |
| 23 | int i, j; | |
| 24 | unsigned long jif; | |
| 25 | cputime64_t user, nice, system, idle, iowait, irq, softirq, steal; | |
| 26 | cputime64_t guest; | |
| 27 | u64 sum = 0; | |
| 28 | struct timespec boottime; | |
| 29 | unsigned int per_irq_sum; | |
| 30 | ||
| 31 | user = nice = system = idle = iowait = | |
| 32 | irq = softirq = steal = cputime64_zero; | |
| 33 | guest = cputime64_zero; | |
| 34 | getboottime(&boottime); | |
| 35 | jif = boottime.tv_sec; | |
| 36 | ||
| 37 | for_each_possible_cpu(i) { | |
| 38 | user = cputime64_add(user, kstat_cpu(i).cpustat.user); | |
| 39 | nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); | |
| 40 | system = cputime64_add(system, kstat_cpu(i).cpustat.system); | |
| 41 | idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); | |
| 42 | iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); | |
| 43 | irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); | |
| 44 | softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); | |
| 45 | steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); | |
| 46 | guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest); | |
| 47 | ||
| 48 | for_each_irq_nr(j) | |
| 49 | sum += kstat_irqs_cpu(j, i); | |
| 50 | ||
| 51 | sum += arch_irq_stat_cpu(i); | |
| 52 | } | |
| 53 | sum += arch_irq_stat(); | |
| 54 | ||
| 55 | seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", | |
| 56 | (unsigned long long)cputime64_to_clock_t(user), | |
| 57 | (unsigned long long)cputime64_to_clock_t(nice), | |
| 58 | (unsigned long long)cputime64_to_clock_t(system), | |
| 59 | (unsigned long long)cputime64_to_clock_t(idle), | |
| 60 | (unsigned long long)cputime64_to_clock_t(iowait), | |
| 61 | (unsigned long long)cputime64_to_clock_t(irq), | |
| 62 | (unsigned long long)cputime64_to_clock_t(softirq), | |
| 63 | (unsigned long long)cputime64_to_clock_t(steal), | |
| 64 | (unsigned long long)cputime64_to_clock_t(guest)); | |
| 65 | for_each_online_cpu(i) { | |
| 66 | ||
| 67 | /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ | |
| 68 | user = kstat_cpu(i).cpustat.user; | |
| 69 | nice = kstat_cpu(i).cpustat.nice; | |
| 70 | system = kstat_cpu(i).cpustat.system; | |
| 71 | idle = kstat_cpu(i).cpustat.idle; | |
| 72 | iowait = kstat_cpu(i).cpustat.iowait; | |
| 73 | irq = kstat_cpu(i).cpustat.irq; | |
| 74 | softirq = kstat_cpu(i).cpustat.softirq; | |
| 75 | steal = kstat_cpu(i).cpustat.steal; | |
| 76 | guest = kstat_cpu(i).cpustat.guest; | |
| 77 | seq_printf(p, | |
| 78 | "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", | |
| 79 | i, | |
| 80 | (unsigned long long)cputime64_to_clock_t(user), | |
| 81 | (unsigned long long)cputime64_to_clock_t(nice), | |
| 82 | (unsigned long long)cputime64_to_clock_t(system), | |
| 83 | (unsigned long long)cputime64_to_clock_t(idle), | |
| 84 | (unsigned long long)cputime64_to_clock_t(iowait), | |
| 85 | (unsigned long long)cputime64_to_clock_t(irq), | |
| 86 | (unsigned long long)cputime64_to_clock_t(softirq), | |
| 87 | (unsigned long long)cputime64_to_clock_t(steal), | |
| 88 | (unsigned long long)cputime64_to_clock_t(guest)); | |
| 89 | } | |
| 90 | seq_printf(p, "intr %llu", (unsigned long long)sum); | |
| 91 | ||
| 92 | /* sum again ? it could be updated? */ | |
| 93 | for_each_irq_nr(j) { | |
| 94 | per_irq_sum = 0; | |
| 95 | ||
| 96 | for_each_possible_cpu(i) | |
| 97 | per_irq_sum += kstat_irqs_cpu(j, i); | |
| 98 | ||
| 99 | seq_printf(p, " %u", per_irq_sum); | |
| 100 | } | |
| 101 | ||
| 102 | seq_printf(p, | |
| 103 | "\nctxt %llu\n" | |
| 104 | "btime %lu\n" | |
| 105 | "processes %lu\n" | |
| 106 | "procs_running %lu\n" | |
| 107 | "procs_blocked %lu\n", | |
| 108 | nr_context_switches(), | |
| 109 | (unsigned long)jif, | |
| 110 | total_forks, | |
| 111 | nr_running(), | |
| 112 | nr_iowait()); | |
| 113 | ||
| 114 | return 0; | |
| 115 | } | |
| 116 | ||
| 117 | static int stat_open(struct inode *inode, struct file *file) | |
| 118 | { | |
| 119 | unsigned size = 4096 * (1 + num_possible_cpus() / 32); | |
| 120 | char *buf; | |
| 121 | struct seq_file *m; | |
| 122 | int res; | |
| 123 | ||
| 124 | /* don't ask for more than the kmalloc() max size, currently 128 KB */ | |
| 125 | if (size > 128 * 1024) | |
| 126 | size = 128 * 1024; | |
| 127 | buf = kmalloc(size, GFP_KERNEL); | |
| 128 | if (!buf) | |
| 129 | return -ENOMEM; | |
| 130 | ||
| 131 | res = single_open(file, show_stat, NULL); | |
| 132 | if (!res) { | |
| 133 | m = file->private_data; | |
| 134 | m->buf = buf; | |
| 135 | m->size = size; | |
| 136 | } else | |
| 137 | kfree(buf); | |
| 138 | return res; | |
| 139 | } | |
| 140 | ||
| 141 | static const struct file_operations proc_stat_operations = { | |
| 142 | .open = stat_open, | |
| 143 | .read = seq_read, | |
| 144 | .llseek = seq_lseek, | |
| 145 | .release = single_release, | |
| 146 | }; | |
| 147 | ||
| 148 | static int __init proc_stat_init(void) | |
| 149 | { | |
| 150 | proc_create("stat", 0, NULL, &proc_stat_operations); | |
| 151 | return 0; | |
| 152 | } | |
| 153 | module_init(proc_stat_init); |