Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #include <linux/cpumask.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/kernel_stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/sched/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/irqnr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/sched/cputime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/tick.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #ifndef arch_irq_stat_cpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define arch_irq_stat_cpu(cpu) 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #ifndef arch_irq_stat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define arch_irq_stat() 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #ifdef arch_idle_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) u64 get_idle_time(struct kernel_cpustat *kcs, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	u64 idle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	idle = kcs->cpustat[CPUTIME_IDLE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (cpu_online(cpu) && !nr_iowait_cpu(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		idle += arch_idle_time(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	return idle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) static u64 get_iowait_time(struct kernel_cpustat *kcs, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	u64 iowait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	iowait = kcs->cpustat[CPUTIME_IOWAIT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	if (cpu_online(cpu) && nr_iowait_cpu(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 		iowait += arch_idle_time(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	return iowait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) u64 get_idle_time(struct kernel_cpustat *kcs, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	u64 idle, idle_usecs = -1ULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	if (cpu_online(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		idle_usecs = get_cpu_idle_time_us(cpu, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	if (idle_usecs == -1ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		/* !NO_HZ or cpu offline so we can rely on cpustat.idle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		idle = kcs->cpustat[CPUTIME_IDLE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		idle = idle_usecs * NSEC_PER_USEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	return idle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) static u64 get_iowait_time(struct kernel_cpustat *kcs, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	u64 iowait, iowait_usecs = -1ULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	if (cpu_online(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		iowait_usecs = get_cpu_iowait_time_us(cpu, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	if (iowait_usecs == -1ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		/* !NO_HZ or cpu offline so we can rely on cpustat.iowait */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		iowait = kcs->cpustat[CPUTIME_IOWAIT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		iowait = iowait_usecs * NSEC_PER_USEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	return iowait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) static void show_irq_gap(struct seq_file *p, unsigned int gap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	static const char zeros[] = " 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	while (gap > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		unsigned int inc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		inc = min_t(unsigned int, gap, ARRAY_SIZE(zeros) / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		seq_write(p, zeros, 2 * inc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		gap -= inc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) static void show_all_irqs(struct seq_file *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	unsigned int i, next = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	for_each_active_irq(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		show_irq_gap(p, i - next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		seq_put_decimal_ull(p, " ", kstat_irqs_usr(i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		next = i + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	show_irq_gap(p, nr_irqs - next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static int show_stat(struct seq_file *p, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	int i, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	u64 user, nice, system, idle, iowait, irq, softirq, steal;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	u64 guest, guest_nice;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	u64 sum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	u64 sum_softirq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	struct timespec64 boottime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	user = nice = system = idle = iowait =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		irq = softirq = steal = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	guest = guest_nice = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	getboottime64(&boottime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		struct kernel_cpustat kcpustat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		u64 *cpustat = kcpustat.cpustat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		kcpustat_cpu_fetch(&kcpustat, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		user		+= cpustat[CPUTIME_USER];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		nice		+= cpustat[CPUTIME_NICE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		system		+= cpustat[CPUTIME_SYSTEM];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		idle		+= get_idle_time(&kcpustat, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		iowait		+= get_iowait_time(&kcpustat, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		irq		+= cpustat[CPUTIME_IRQ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		softirq		+= cpustat[CPUTIME_SOFTIRQ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		steal		+= cpustat[CPUTIME_STEAL];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		guest		+= cpustat[CPUTIME_GUEST];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		guest_nice	+= cpustat[CPUTIME_GUEST_NICE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		sum		+= kstat_cpu_irqs_sum(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		sum		+= arch_irq_stat_cpu(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		for (j = 0; j < NR_SOFTIRQS; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			unsigned int softirq_stat = kstat_softirqs_cpu(j, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			per_softirq_sums[j] += softirq_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			sum_softirq += softirq_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	sum += arch_irq_stat();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	seq_put_decimal_ull(p, "cpu  ", nsec_to_clock_t(user));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	seq_put_decimal_ull(p, " ", nsec_to_clock_t(nice));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	seq_put_decimal_ull(p, " ", nsec_to_clock_t(system));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	seq_put_decimal_ull(p, " ", nsec_to_clock_t(idle));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	seq_put_decimal_ull(p, " ", nsec_to_clock_t(iowait));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	seq_put_decimal_ull(p, " ", nsec_to_clock_t(irq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	seq_put_decimal_ull(p, " ", nsec_to_clock_t(softirq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	seq_put_decimal_ull(p, " ", nsec_to_clock_t(steal));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest_nice));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	seq_putc(p, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	for_each_online_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		struct kernel_cpustat kcpustat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		u64 *cpustat = kcpustat.cpustat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		kcpustat_cpu_fetch(&kcpustat, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		user		= cpustat[CPUTIME_USER];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		nice		= cpustat[CPUTIME_NICE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		system		= cpustat[CPUTIME_SYSTEM];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		idle		= get_idle_time(&kcpustat, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		iowait		= get_iowait_time(&kcpustat, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		irq		= cpustat[CPUTIME_IRQ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		softirq		= cpustat[CPUTIME_SOFTIRQ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		steal		= cpustat[CPUTIME_STEAL];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		guest		= cpustat[CPUTIME_GUEST];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		guest_nice	= cpustat[CPUTIME_GUEST_NICE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		seq_printf(p, "cpu%d", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(user));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(nice));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(system));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(idle));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(iowait));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(irq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(softirq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(steal));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(guest_nice));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		seq_putc(p, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	seq_put_decimal_ull(p, "intr ", (unsigned long long)sum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	show_all_irqs(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	seq_printf(p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		"\nctxt %llu\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		"btime %llu\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		"processes %lu\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		"procs_running %lu\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		"procs_blocked %lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		nr_context_switches(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		(unsigned long long)boottime.tv_sec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		total_forks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		nr_running(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		nr_iowait());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	seq_put_decimal_ull(p, "softirq ", (unsigned long long)sum_softirq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	for (i = 0; i < NR_SOFTIRQS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		seq_put_decimal_ull(p, " ", per_softirq_sums[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	seq_putc(p, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static int stat_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	unsigned int size = 1024 + 128 * num_online_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	/* minimum size to display an interrupt count : 2 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	size += 2 * nr_irqs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	return single_open_size(file, show_stat, NULL, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) static const struct proc_ops stat_proc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	.proc_flags	= PROC_ENTRY_PERMANENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	.proc_open	= stat_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	.proc_read_iter	= seq_read_iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	.proc_lseek	= seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	.proc_release	= single_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static int __init proc_stat_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	proc_create("stat", 0, NULL, &stat_proc_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) fs_initcall(proc_stat_init);