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 struct timespec boottime; 33 unsigned int per_irq_sum; 34 35 user = nice = system = idle = iowait = 36 irq = softirq = steal = cputime64_zero; 37 guest = 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 for_each_irq_nr(j) { 53 sum += kstat_irqs_cpu(j, i); 54 } 55 sum += arch_irq_stat_cpu(i); 56 } 57 sum += arch_irq_stat(); 58 59 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", 60 (unsigned long long)cputime64_to_clock_t(user), 61 (unsigned long long)cputime64_to_clock_t(nice), 62 (unsigned long long)cputime64_to_clock_t(system), 63 (unsigned long long)cputime64_to_clock_t(idle), 64 (unsigned long long)cputime64_to_clock_t(iowait), 65 (unsigned long long)cputime64_to_clock_t(irq), 66 (unsigned long long)cputime64_to_clock_t(softirq), 67 (unsigned long long)cputime64_to_clock_t(steal), 68 (unsigned long long)cputime64_to_clock_t(guest)); 69 for_each_online_cpu(i) { 70 71 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */ 72 user = kstat_cpu(i).cpustat.user; 73 nice = kstat_cpu(i).cpustat.nice; 74 system = kstat_cpu(i).cpustat.system; 75 idle = kstat_cpu(i).cpustat.idle; 76 idle = cputime64_add(idle, arch_idle_time(i)); 77 iowait = kstat_cpu(i).cpustat.iowait; 78 irq = kstat_cpu(i).cpustat.irq; 79 softirq = kstat_cpu(i).cpustat.softirq; 80 steal = kstat_cpu(i).cpustat.steal; 81 guest = kstat_cpu(i).cpustat.guest; 82 seq_printf(p, 83 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n", 84 i, 85 (unsigned long long)cputime64_to_clock_t(user), 86 (unsigned long long)cputime64_to_clock_t(nice), 87 (unsigned long long)cputime64_to_clock_t(system), 88 (unsigned long long)cputime64_to_clock_t(idle), 89 (unsigned long long)cputime64_to_clock_t(iowait), 90 (unsigned long long)cputime64_to_clock_t(irq), 91 (unsigned long long)cputime64_to_clock_t(softirq), 92 (unsigned long long)cputime64_to_clock_t(steal), 93 (unsigned long long)cputime64_to_clock_t(guest)); 94 } 95 seq_printf(p, "intr %llu", (unsigned long long)sum); 96 97 /* sum again ? it could be updated? */ 98 for_each_irq_nr(j) { 99 per_irq_sum = 0; 100 for_each_possible_cpu(i) 101 per_irq_sum += kstat_irqs_cpu(j, i); 102 103 seq_printf(p, " %u", per_irq_sum); 104 } 105 106 seq_printf(p, 107 "\nctxt %llu\n" 108 "btime %lu\n" 109 "processes %lu\n" 110 "procs_running %lu\n" 111 "procs_blocked %lu\n", 112 nr_context_switches(), 113 (unsigned long)jif, 114 total_forks, 115 nr_running(), 116 nr_iowait()); 117 118 return 0; 119 } 120 121 static int stat_open(struct inode *inode, struct file *file) 122 { 123 unsigned size = 4096 * (1 + num_possible_cpus() / 32); 124 char *buf; 125 struct seq_file *m; 126 int res; 127 128 /* don't ask for more than the kmalloc() max size, currently 128 KB */ 129 if (size > 128 * 1024) 130 size = 128 * 1024; 131 buf = kmalloc(size, GFP_KERNEL); 132 if (!buf) 133 return -ENOMEM; 134 135 res = single_open(file, show_stat, NULL); 136 if (!res) { 137 m = file->private_data; 138 m->buf = buf; 139 m->size = size; 140 } else 141 kfree(buf); 142 return res; 143 } 144 145 static const struct file_operations proc_stat_operations = { 146 .open = stat_open, 147 .read = seq_read, 148 .llseek = seq_lseek, 149 .release = single_release, 150 }; 151 152 static int __init proc_stat_init(void) 153 { 154 proc_create("stat", 0, NULL, &proc_stat_operations); 155 return 0; 156 } 157 module_init(proc_stat_init); 158