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 unsigned int per_irq_sum; 35 36 user = nice = system = idle = iowait = 37 irq = softirq = steal = cputime64_zero; 38 guest = guest_nice = cputime64_zero; 39 getboottime(&boottime); 40 jif = boottime.tv_sec; 41 42 for_each_possible_cpu(i) { 43 user = cputime64_add(user, kstat_cpu(i).cpustat.user); 44 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); 45 system = cputime64_add(system, kstat_cpu(i).cpustat.system); 46 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); 47 idle = cputime64_add(idle, arch_idle_time(i)); 48 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); 49 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); 50 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); 51 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); 52 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest); 53 guest_nice = cputime64_add(guest_nice, 54 kstat_cpu(i).cpustat.guest_nice); 55 for_each_irq_nr(j) { 56 sum += kstat_irqs_cpu(j, i); 57 } 58 sum += arch_irq_stat_cpu(i); 59 60 for (j = 0; j < NR_SOFTIRQS; j++) { 61 unsigned int softirq_stat = kstat_softirqs_cpu(j, i); 62 63 per_softirq_sums[j] += softirq_stat; 64 sum_softirq += softirq_stat; 65 } 66 } 67 sum += arch_irq_stat(); 68 69 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu " 70 "%llu\n", 71 (unsigned long long)cputime64_to_clock_t(user), 72 (unsigned long long)cputime64_to_clock_t(nice), 73 (unsigned long long)cputime64_to_clock_t(system), 74 (unsigned long long)cputime64_to_clock_t(idle), 75 (unsigned long long)cputime64_to_clock_t(iowait), 76 (unsigned long long)cputime64_to_clock_t(irq), 77 (unsigned long long)cputime64_to_clock_t(softirq), 78 (unsigned long long)cputime64_to_clock_t(steal), 79 (unsigned long long)cputime64_to_clock_t(guest), 80 (unsigned long long)cputime64_to_clock_t(guest_nice)); 81 for_each_online_cpu(i) { 82 83 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ 84 user = kstat_cpu(i).cpustat.user; 85 nice = kstat_cpu(i).cpustat.nice; 86 system = kstat_cpu(i).cpustat.system; 87 idle = kstat_cpu(i).cpustat.idle; 88 idle = cputime64_add(idle, arch_idle_time(i)); 89 iowait = kstat_cpu(i).cpustat.iowait; 90 irq = kstat_cpu(i).cpustat.irq; 91 softirq = kstat_cpu(i).cpustat.softirq; 92 steal = kstat_cpu(i).cpustat.steal; 93 guest = kstat_cpu(i).cpustat.guest; 94 guest_nice = kstat_cpu(i).cpustat.guest_nice; 95 seq_printf(p, 96 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu " 97 "%llu\n", 98 i, 99 (unsigned long long)cputime64_to_clock_t(user), 100 (unsigned long long)cputime64_to_clock_t(nice), 101 (unsigned long long)cputime64_to_clock_t(system), 102 (unsigned long long)cputime64_to_clock_t(idle), 103 (unsigned long long)cputime64_to_clock_t(iowait), 104 (unsigned long long)cputime64_to_clock_t(irq), 105 (unsigned long long)cputime64_to_clock_t(softirq), 106 (unsigned long long)cputime64_to_clock_t(steal), 107 (unsigned long long)cputime64_to_clock_t(guest), 108 (unsigned long long)cputime64_to_clock_t(guest_nice)); 109 } 110 seq_printf(p, "intr %llu", (unsigned long long)sum); 111 112 /* sum again ? it could be updated? */ 113 for_each_irq_nr(j) { 114 per_irq_sum = 0; 115 for_each_possible_cpu(i) 116 per_irq_sum += kstat_irqs_cpu(j, i); 117 118 seq_printf(p, " %u", per_irq_sum); 119 } 120 121 seq_printf(p, 122 "\nctxt %llu\n" 123 "btime %lu\n" 124 "processes %lu\n" 125 "procs_running %lu\n" 126 "procs_blocked %lu\n", 127 nr_context_switches(), 128 (unsigned long)jif, 129 total_forks, 130 nr_running(), 131 nr_iowait()); 132 133 seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq); 134 135 for (i = 0; i < NR_SOFTIRQS; i++) 136 seq_printf(p, " %u", per_softirq_sums[i]); 137 seq_printf(p, "\n"); 138 139 return 0; 140 } 141 142 static int stat_open(struct inode *inode, struct file *file) 143 { 144 unsigned size = 4096 * (1 + num_possible_cpus() / 32); 145 char *buf; 146 struct seq_file *m; 147 int res; 148 149 /* don't ask for more than the kmalloc() max size, currently 128 KB */ 150 if (size > 128 * 1024) 151 size = 128 * 1024; 152 buf = kmalloc(size, GFP_KERNEL); 153 if (!buf) 154 return -ENOMEM; 155 156 res = single_open(file, show_stat, NULL); 157 if (!res) { 158 m = file->private_data; 159 m->buf = buf; 160 m->size = size; 161 } else 162 kfree(buf); 163 return res; 164 } 165 166 static const struct file_operations proc_stat_operations = { 167 .open = stat_open, 168 .read = seq_read, 169 .llseek = seq_lseek, 170 .release = single_release, 171 }; 172 173 static int __init proc_stat_init(void) 174 { 175 proc_create("stat", 0, NULL, &proc_stat_operations); 176 return 0; 177 } 178 module_init(proc_stat_init); 179