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 <linux/irqnr.h> 13 #include <asm/cputime.h> 14 15 #ifndef arch_irq_stat_cpu 16 #define arch_irq_stat_cpu(cpu) 0 17 #endif 18 #ifndef arch_irq_stat 19 #define arch_irq_stat() 0 20 #endif 21 #ifndef arch_idle_time 22 #define arch_idle_time(cpu) 0 23 #endif 24 25 static int show_stat(struct seq_file *p, void *v) 26 { 27 int i, j; 28 unsigned long jif; 29 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal; 30 cputime64_t guest; 31 u64 sum = 0; 32 u64 sum_softirq = 0; 33 unsigned int per_softirq_sums[NR_SOFTIRQS] = {0}; 34 struct timespec boottime; 35 unsigned int per_irq_sum; 36 37 user = nice = system = idle = iowait = 38 irq = softirq = steal = cputime64_zero; 39 guest = cputime64_zero; 40 getboottime(&boottime); 41 jif = boottime.tv_sec; 42 43 for_each_possible_cpu(i) { 44 user = cputime64_add(user, kstat_cpu(i).cpustat.user); 45 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice); 46 system = cputime64_add(system, kstat_cpu(i).cpustat.system); 47 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle); 48 idle = cputime64_add(idle, arch_idle_time(i)); 49 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait); 50 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq); 51 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq); 52 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal); 53 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest); 54 for_each_irq_nr(j) { 55 sum += kstat_irqs_cpu(j, i); 56 } 57 sum += arch_irq_stat_cpu(i); 58 59 for (j = 0; j < NR_SOFTIRQS; j++) { 60 unsigned int softirq_stat = kstat_softirqs_cpu(j, i); 61 62 per_softirq_sums[j] += softirq_stat; 63 sum_softirq += softirq_stat; 64 } 65 } 66 sum += arch_irq_stat(); 67 68 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", 69 (unsigned long long)cputime64_to_clock_t(user), 70 (unsigned long long)cputime64_to_clock_t(nice), 71 (unsigned long long)cputime64_to_clock_t(system), 72 (unsigned long long)cputime64_to_clock_t(idle), 73 (unsigned long long)cputime64_to_clock_t(iowait), 74 (unsigned long long)cputime64_to_clock_t(irq), 75 (unsigned long long)cputime64_to_clock_t(softirq), 76 (unsigned long long)cputime64_to_clock_t(steal), 77 (unsigned long long)cputime64_to_clock_t(guest)); 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 seq_printf(p, 92 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", 93 i, 94 (unsigned long long)cputime64_to_clock_t(user), 95 (unsigned long long)cputime64_to_clock_t(nice), 96 (unsigned long long)cputime64_to_clock_t(system), 97 (unsigned long long)cputime64_to_clock_t(idle), 98 (unsigned long long)cputime64_to_clock_t(iowait), 99 (unsigned long long)cputime64_to_clock_t(irq), 100 (unsigned long long)cputime64_to_clock_t(softirq), 101 (unsigned long long)cputime64_to_clock_t(steal), 102 (unsigned long long)cputime64_to_clock_t(guest)); 103 } 104 seq_printf(p, "intr %llu", (unsigned long long)sum); 105 106 /* sum again ? it could be updated? */ 107 for_each_irq_nr(j) { 108 per_irq_sum = 0; 109 for_each_possible_cpu(i) 110 per_irq_sum += kstat_irqs_cpu(j, i); 111 112 seq_printf(p, " %u", per_irq_sum); 113 } 114 115 seq_printf(p, 116 "\nctxt %llu\n" 117 "btime %lu\n" 118 "processes %lu\n" 119 "procs_running %lu\n" 120 "procs_blocked %lu\n", 121 nr_context_switches(), 122 (unsigned long)jif, 123 total_forks, 124 nr_running(), 125 nr_iowait()); 126 127 seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq); 128 129 for (i = 0; i < NR_SOFTIRQS; i++) 130 seq_printf(p, " %u", per_softirq_sums[i]); 131 seq_printf(p, "\n"); 132 133 return 0; 134 } 135 136 static int stat_open(struct inode *inode, struct file *file) 137 { 138 unsigned size = 4096 * (1 + num_possible_cpus() / 32); 139 char *buf; 140 struct seq_file *m; 141 int res; 142 143 /* don't ask for more than the kmalloc() max size, currently 128 KB */ 144 if (size > 128 * 1024) 145 size = 128 * 1024; 146 buf = kmalloc(size, GFP_KERNEL); 147 if (!buf) 148 return -ENOMEM; 149 150 res = single_open(file, show_stat, NULL); 151 if (!res) { 152 m = file->private_data; 153 m->buf = buf; 154 m->size = size; 155 } else 156 kfree(buf); 157 return res; 158 } 159 160 static const struct file_operations proc_stat_operations = { 161 .open = stat_open, 162 .read = seq_read, 163 .llseek = seq_lseek, 164 .release = single_release, 165 }; 166 167 static int __init proc_stat_init(void) 168 { 169 proc_create("stat", 0, NULL, &proc_stat_operations); 170 return 0; 171 } 172 module_init(proc_stat_init); 173