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); 154