1 #include <linux/cpumask.h> 2 #include <linux/fs.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 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 #ifndef arch_idle_time 21 #define arch_idle_time(cpu) 0 22 #endif 23 24 static int show_stat(struct seq_file *p, void *v) 25 { 26 int i, j; 27 unsigned long jif; 28 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal; 29 cputime64_t guest, guest_nice; 30 u64 sum = 0; 31 u64 sum_softirq = 0; 32 unsigned int per_softirq_sums[NR_SOFTIRQS] = {0}; 33 struct timespec boottime; 34 35 user = nice = system = idle = iowait = 36 irq = softirq = steal = cputime64_zero; 37 guest = guest_nice = cputime64_zero; 38 getboottime(&boottime); 39 jif = boottime.tv_sec; 40 41 for_each_possible_cpu(i) { 42 user = cputime64_add(user, kstat_cpu(i).cpustat.user); 43 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); 44 system = cputime64_add(system, kstat_cpu(i).cpustat.system); 45 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); 46 idle = cputime64_add(idle, arch_idle_time(i)); 47 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); 48 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); 49 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); 50 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); 51 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest); 52 guest_nice = cputime64_add(guest_nice, 53 kstat_cpu(i).cpustat.guest_nice); 54 sum += kstat_cpu_irqs_sum(i); 55 sum += arch_irq_stat_cpu(i); 56 57 for (j = 0; j < NR_SOFTIRQS; j++) { 58 unsigned int softirq_stat = kstat_softirqs_cpu(j, i); 59 60 per_softirq_sums[j] += softirq_stat; 61 sum_softirq += softirq_stat; 62 } 63 } 64 sum += arch_irq_stat(); 65 66 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu " 67 "%llu\n", 68 (unsigned long long)cputime64_to_clock_t(user), 69 (unsigned long long)cputime64_to_clock_t(nice), 70 (unsigned long long)cputime64_to_clock_t(system), 71 (unsigned long long)cputime64_to_clock_t(idle), 72 (unsigned long long)cputime64_to_clock_t(iowait), 73 (unsigned long long)cputime64_to_clock_t(irq), 74 (unsigned long long)cputime64_to_clock_t(softirq), 75 (unsigned long long)cputime64_to_clock_t(steal), 76 (unsigned long long)cputime64_to_clock_t(guest), 77 (unsigned long long)cputime64_to_clock_t(guest_nice)); 78 for_each_online_cpu(i) { 79 80 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ 81 user = kstat_cpu(i).cpustat.user; 82 nice = kstat_cpu(i).cpustat.nice; 83 system = kstat_cpu(i).cpustat.system; 84 idle = kstat_cpu(i).cpustat.idle; 85 idle = cputime64_add(idle, arch_idle_time(i)); 86 iowait = kstat_cpu(i).cpustat.iowait; 87 irq = kstat_cpu(i).cpustat.irq; 88 softirq = kstat_cpu(i).cpustat.softirq; 89 steal = kstat_cpu(i).cpustat.steal; 90 guest = kstat_cpu(i).cpustat.guest; 91 guest_nice = kstat_cpu(i).cpustat.guest_nice; 92 seq_printf(p, 93 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu " 94 "%llu\n", 95 i, 96 (unsigned long long)cputime64_to_clock_t(user), 97 (unsigned long long)cputime64_to_clock_t(nice), 98 (unsigned long long)cputime64_to_clock_t(system), 99 (unsigned long long)cputime64_to_clock_t(idle), 100 (unsigned long long)cputime64_to_clock_t(iowait), 101 (unsigned long long)cputime64_to_clock_t(irq), 102 (unsigned long long)cputime64_to_clock_t(softirq), 103 (unsigned long long)cputime64_to_clock_t(steal), 104 (unsigned long long)cputime64_to_clock_t(guest), 105 (unsigned long long)cputime64_to_clock_t(guest_nice)); 106 } 107 seq_printf(p, "intr %llu", (unsigned long long)sum); 108 109 /* sum again ? it could be updated? */ 110 for_each_irq_nr(j) 111 seq_printf(p, " %u", kstat_irqs(j)); 112 113 seq_printf(p, 114 "\nctxt %llu\n" 115 "btime %lu\n" 116 "processes %lu\n" 117 "procs_running %lu\n" 118 "procs_blocked %lu\n", 119 nr_context_switches(), 120 (unsigned long)jif, 121 total_forks, 122 nr_running(), 123 nr_iowait()); 124 125 seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq); 126 127 for (i = 0; i < NR_SOFTIRQS; i++) 128 seq_printf(p, " %u", per_softirq_sums[i]); 129 seq_putc(p, '\n'); 130 131 return 0; 132 } 133 134 static int stat_open(struct inode *inode, struct file *file) 135 { 136 unsigned size = 4096 * (1 + num_possible_cpus() / 32); 137 char *buf; 138 struct seq_file *m; 139 int res; 140 141 /* don't ask for more than the kmalloc() max size */ 142 if (size > KMALLOC_MAX_SIZE) 143 size = KMALLOC_MAX_SIZE; 144 buf = kmalloc(size, GFP_KERNEL); 145 if (!buf) 146 return -ENOMEM; 147 148 res = single_open(file, show_stat, NULL); 149 if (!res) { 150 m = file->private_data; 151 m->buf = buf; 152 m->size = size; 153 } else 154 kfree(buf); 155 return res; 156 } 157 158 static const struct file_operations proc_stat_operations = { 159 .open = stat_open, 160 .read = seq_read, 161 .llseek = seq_lseek, 162 .release = single_release, 163 }; 164 165 static int __init proc_stat_init(void) 166 { 167 proc_create("stat", 0, NULL, &proc_stat_operations); 168 return 0; 169 } 170 module_init(proc_stat_init); 171