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, guest_nice; 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 = guest_nice = 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 guest_nice = cputime64_add(guest_nice, 55 kstat_cpu(i).cpustat.guest_nice); 56 for_each_irq_nr(j) { 57 sum += kstat_irqs_cpu(j, i); 58 } 59 sum += arch_irq_stat_cpu(i); 60 61 for (j = 0; j < NR_SOFTIRQS; j++) { 62 unsigned int softirq_stat = kstat_softirqs_cpu(j, i); 63 64 per_softirq_sums[j] += softirq_stat; 65 sum_softirq += softirq_stat; 66 } 67 } 68 sum += arch_irq_stat(); 69 70 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu " 71 "%llu\n", 72 (unsigned long long)cputime64_to_clock_t(user), 73 (unsigned long long)cputime64_to_clock_t(nice), 74 (unsigned long long)cputime64_to_clock_t(system), 75 (unsigned long long)cputime64_to_clock_t(idle), 76 (unsigned long long)cputime64_to_clock_t(iowait), 77 (unsigned long long)cputime64_to_clock_t(irq), 78 (unsigned long long)cputime64_to_clock_t(softirq), 79 (unsigned long long)cputime64_to_clock_t(steal), 80 (unsigned long long)cputime64_to_clock_t(guest), 81 (unsigned long long)cputime64_to_clock_t(guest_nice)); 82 for_each_online_cpu(i) { 83 84 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ 85 user = kstat_cpu(i).cpustat.user; 86 nice = kstat_cpu(i).cpustat.nice; 87 system = kstat_cpu(i).cpustat.system; 88 idle = kstat_cpu(i).cpustat.idle; 89 idle = cputime64_add(idle, arch_idle_time(i)); 90 iowait = kstat_cpu(i).cpustat.iowait; 91 irq = kstat_cpu(i).cpustat.irq; 92 softirq = kstat_cpu(i).cpustat.softirq; 93 steal = kstat_cpu(i).cpustat.steal; 94 guest = kstat_cpu(i).cpustat.guest; 95 guest_nice = kstat_cpu(i).cpustat.guest_nice; 96 seq_printf(p, 97 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu " 98 "%llu\n", 99 i, 100 (unsigned long long)cputime64_to_clock_t(user), 101 (unsigned long long)cputime64_to_clock_t(nice), 102 (unsigned long long)cputime64_to_clock_t(system), 103 (unsigned long long)cputime64_to_clock_t(idle), 104 (unsigned long long)cputime64_to_clock_t(iowait), 105 (unsigned long long)cputime64_to_clock_t(irq), 106 (unsigned long long)cputime64_to_clock_t(softirq), 107 (unsigned long long)cputime64_to_clock_t(steal), 108 (unsigned long long)cputime64_to_clock_t(guest), 109 (unsigned long long)cputime64_to_clock_t(guest_nice)); 110 } 111 seq_printf(p, "intr %llu", (unsigned long long)sum); 112 113 /* sum again ? it could be updated? */ 114 for_each_irq_nr(j) { 115 per_irq_sum = 0; 116 for_each_possible_cpu(i) 117 per_irq_sum += kstat_irqs_cpu(j, i); 118 119 seq_printf(p, " %u", per_irq_sum); 120 } 121 122 seq_printf(p, 123 "\nctxt %llu\n" 124 "btime %lu\n" 125 "processes %lu\n" 126 "procs_running %lu\n" 127 "procs_blocked %lu\n", 128 nr_context_switches(), 129 (unsigned long)jif, 130 total_forks, 131 nr_running(), 132 nr_iowait()); 133 134 seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq); 135 136 for (i = 0; i < NR_SOFTIRQS; i++) 137 seq_printf(p, " %u", per_softirq_sums[i]); 138 seq_printf(p, "\n"); 139 140 return 0; 141 } 142 143 static int stat_open(struct inode *inode, struct file *file) 144 { 145 unsigned size = 4096 * (1 + num_possible_cpus() / 32); 146 char *buf; 147 struct seq_file *m; 148 int res; 149 150 /* don't ask for more than the kmalloc() max size, currently 128 KB */ 151 if (size > 128 * 1024) 152 size = 128 * 1024; 153 buf = kmalloc(size, GFP_KERNEL); 154 if (!buf) 155 return -ENOMEM; 156 157 res = single_open(file, show_stat, NULL); 158 if (!res) { 159 m = file->private_data; 160 m->buf = buf; 161 m->size = size; 162 } else 163 kfree(buf); 164 return res; 165 } 166 167 static const struct file_operations proc_stat_operations = { 168 .open = stat_open, 169 .read = seq_read, 170 .llseek = seq_lseek, 171 .release = single_release, 172 }; 173 174 static int __init proc_stat_init(void) 175 { 176 proc_create("stat", 0, NULL, &proc_stat_operations); 177 return 0; 178 } 179 module_init(proc_stat_init); 180