[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / proc / stat.c

#include <linux/cpumask.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
#include <linux/proc_fs.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/irqnr.h>
#include <linux/vmalloc.h>
#include <asm/cputime.h>
#include <linux/tick.h>

#ifndef arch_irq_stat_cpu
#define arch_irq_stat_cpu(cpu) 0
#endif
#ifndef arch_irq_stat
#define arch_irq_stat() 0
#endif

#ifdef arch_idle_time

static cputime64_t get_idle_time(int cpu)
{
	cputime64_t idle;

	idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
	if (cpu_online(cpu) && !nr_iowait_cpu(cpu))
		idle += arch_idle_time(cpu);
	return idle;
}

static cputime64_t get_iowait_time(int cpu)
{
	cputime64_t iowait;

	iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
	if (cpu_online(cpu) && nr_iowait_cpu(cpu))
		iowait += arch_idle_time(cpu);
	return iowait;
}

#else

static u64 get_idle_time(int cpu)
{
	u64 idle, idle_time = -1ULL;

	if (cpu_online(cpu))
		idle_time = get_cpu_idle_time_us(cpu, NULL);

	if (idle_time == -1ULL)
		/* !NO_HZ or cpu offline so we can rely on cpustat.idle */
		idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
	else
		idle = usecs_to_cputime64(idle_time);

	return idle;
}

static u64 get_iowait_time(int cpu)
{
	u64 iowait, iowait_time = -1ULL;

	if (cpu_online(cpu))
		iowait_time = get_cpu_iowait_time_us(cpu, NULL);

	if (iowait_time == -1ULL)
		/* !NO_HZ or cpu offline so we can rely on cpustat.iowait */
		iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
	else
		iowait = usecs_to_cputime64(iowait_time);

	return iowait;
}

#endif

static int show_stat(struct seq_file *p, void *v)
{
	int i, j;
	unsigned long jif;
	u64 user, nice, system, idle, iowait, irq, softirq, steal;
	u64 guest, guest_nice;
	u64 sum = 0;
	u64 sum_softirq = 0;
	unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
	struct timespec boottime;

	user = nice = system = idle = iowait =
		irq = softirq = steal = 0;
	guest = guest_nice = 0;
	getboottime(&boottime);
	jif = boottime.tv_sec;

	for_each_possible_cpu(i) {
		user += kcpustat_cpu(i).cpustat[CPUTIME_USER];
		nice += kcpustat_cpu(i).cpustat[CPUTIME_NICE];
		system += kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM];
		idle += get_idle_time(i);
		iowait += get_iowait_time(i);
		irq += kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
		softirq += kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ];
		steal += kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
		guest += kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
		guest_nice += kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
		sum += kstat_cpu_irqs_sum(i);
		sum += arch_irq_stat_cpu(i);

		for (j = 0; j < NR_SOFTIRQS; j++) {
			unsigned int softirq_stat = kstat_softirqs_cpu(j, i);

			per_softirq_sums[j] += softirq_stat;
			sum_softirq += softirq_stat;
		}
	}
	sum += arch_irq_stat();

	seq_puts(p, "cpu ");
	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user));
	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice));
	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system));
	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle));
	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait));
	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq));
	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq));
	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
	seq_putc(p, '\n');

	for_each_online_cpu(i) {
		/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
		user = kcpustat_cpu(i).cpustat[CPUTIME_USER];
		nice = kcpustat_cpu(i).cpustat[CPUTIME_NICE];
		system = kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM];
		idle = get_idle_time(i);
		iowait = get_iowait_time(i);
		irq = kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
		softirq = kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ];
		steal = kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
		guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
		guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
		seq_printf(p, "cpu%d", i);
		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user));
		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice));
		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system));
		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle));
		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait));
		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq));
		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq));
		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
		seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
		seq_putc(p, '\n');
	}
	seq_printf(p, "intr %llu", (unsigned long long)sum);

	/* sum again ? it could be updated? */
	for_each_irq_nr(j)
		seq_put_decimal_ull(p, ' ', kstat_irqs(j));

	seq_printf(p,
		"\nctxt %llu\n"
		"btime %lu\n"
		"processes %lu\n"
		"procs_running %lu\n"
		"procs_blocked %lu\n",
		nr_context_switches(),
		(unsigned long)jif,
		total_forks,
		nr_running(),
		nr_iowait());

	seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq);

	for (i = 0; i < NR_SOFTIRQS; i++)
		seq_put_decimal_ull(p, ' ', per_softirq_sums[i]);
	seq_putc(p, '\n');

	return 0;
}

static int stat_open(struct inode *inode, struct file *file)
{
	size_t size = 1024 + 128 * num_possible_cpus();
	char *buf;
	struct seq_file *m;
	int res;

	/* minimum size to display an interrupt count : 2 bytes */
	size += 2 * nr_irqs;

	/* don't ask for more than the kmalloc() max size */
	//if (size > KMALLOC_MAX_SIZE)
	//	size = KMALLOC_MAX_SIZE;
	//buf = kmalloc(size, GFP_KERNEL);
	buf = vmalloc(size);
	if (!buf)
		return -ENOMEM;

	res = single_open(file, show_stat, NULL);
	if (!res) {
		m = file->private_data;
		m->buf = buf;
        //m->size = ksize(buf);
		m->size = size;
	} else
		//kfree(buf);
		vfree(buf);
	return res;
}

static const struct file_operations proc_stat_operations = {
	.open		= stat_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

static int __init proc_stat_init(void)
{
	proc_create("stat", 0, NULL, &proc_stat_operations);
	return 0;
}
module_init(proc_stat_init);
Commit	Line	Data
df8106db AD	1	#include <linux/cpumask.h>
df8106db AD	2	#include <linux/fs.h>
df8106db AD	3	#include <linux/init.h>
	4	#include <linux/interrupt.h>
	5	#include <linux/kernel_stat.h>
	6	#include <linux/proc_fs.h>
	7	#include <linux/sched.h>
	8	#include <linux/seq_file.h>
	9	#include <linux/slab.h>
	10	#include <linux/time.h>
26ddd8d5	11	#include <linux/irqnr.h>
6fa3eb70	12	#include <linux/vmalloc.h>
df8106db	13	#include <asm/cputime.h>
a25cac51	14	#include <linux/tick.h>
df8106db AD	15
	16	#ifndef arch_irq_stat_cpu
	17	#define arch_irq_stat_cpu(cpu) 0
	18	#endif
	19	#ifndef arch_irq_stat
	20	#define arch_irq_stat() 0
	21	#endif
cb85a6ed MS	22
	23	#ifdef arch_idle_time
	24
	25	static cputime64_t get_idle_time(int cpu)
	26	{
	27	cputime64_t idle;
	28
	29	idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
	30	if (cpu_online(cpu) && !nr_iowait_cpu(cpu))
	31	idle += arch_idle_time(cpu);
	32	return idle;
	33	}
	34
	35	static cputime64_t get_iowait_time(int cpu)
	36	{
	37	cputime64_t iowait;
	38
	39	iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
	40	if (cpu_online(cpu) && nr_iowait_cpu(cpu))
	41	iowait += arch_idle_time(cpu);
	42	return iowait;
	43	}
	44
	45	#else
df8106db	46
3292beb3	47	static u64 get_idle_time(int cpu)
a25cac51	48	{
7386cdbf MH	49	u64 idle, idle_time = -1ULL;
	50
	51	if (cpu_online(cpu))
	52	idle_time = get_cpu_idle_time_us(cpu, NULL);
a25cac51	53
cb85a6ed	54	if (idle_time == -1ULL)
7386cdbf	55	/* !NO_HZ or cpu offline so we can rely on cpustat.idle */
3292beb3	56	idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
cb85a6ed	57	else
34845636	58	idle = usecs_to_cputime64(idle_time);
a25cac51 MH	59
	60	return idle;
	61	}
	62
3292beb3	63	static u64 get_iowait_time(int cpu)
a25cac51	64	{
7386cdbf MH	65	u64 iowait, iowait_time = -1ULL;
	66
	67	if (cpu_online(cpu))
	68	iowait_time = get_cpu_iowait_time_us(cpu, NULL);
a25cac51 MH	69
a25cac51 MH	70	if (iowait_time == -1ULL)
7386cdbf	71	/* !NO_HZ or cpu offline so we can rely on cpustat.iowait */
3292beb3	72	iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
a25cac51	73	else
34845636	74	iowait = usecs_to_cputime64(iowait_time);
a25cac51 MH	75
	76	return iowait;
	77	}
	78
cb85a6ed MS	79	#endif
cb85a6ed MS	80
df8106db AD	81	static int show_stat(struct seq_file p, void v)
	82	{
	83	int i, j;
	84	unsigned long jif;
3292beb3 GC	85	u64 user, nice, system, idle, iowait, irq, softirq, steal;
3292beb3 GC	86	u64 guest, guest_nice;
df8106db	87	u64 sum = 0;
d3d64df2 KK	88	u64 sum_softirq = 0;
d3d64df2 KK	89	unsigned int per_softirq_sums[NR_SOFTIRQS] = {0};
df8106db	90	struct timespec boottime;
df8106db AD	91
df8106db AD	92	user = nice = system = idle = iowait =
3292beb3 GC	93	irq = softirq = steal = 0;
3292beb3 GC	94	guest = guest_nice = 0;
df8106db AD	95	getboottime(&boottime);
	96	jif = boottime.tv_sec;
	97
	98	for_each_possible_cpu(i) {
3292beb3 GC	99	user += kcpustat_cpu(i).cpustat[CPUTIME_USER];
	100	nice += kcpustat_cpu(i).cpustat[CPUTIME_NICE];
	101	system += kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM];
	102	idle += get_idle_time(i);
	103	iowait += get_iowait_time(i);
	104	irq += kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
	105	softirq += kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ];
	106	steal += kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
	107	guest += kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
	108	guest_nice += kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
f7e6746e RK	109	sum += kstat_cpu_irqs_sum(i);
f7e6746e RK	110	sum += arch_irq_stat_cpu(i);
d3d64df2 KK	111
	112	for (j = 0; j < NR_SOFTIRQS; j++) {
	113	unsigned int softirq_stat = kstat_softirqs_cpu(j, i);
	114
	115	per_softirq_sums[j] += softirq_stat;
	116	sum_softirq += softirq_stat;
	117	}
df8106db AD	118	}
	119	sum += arch_irq_stat();
	120
1ac101a5 KH	121	seq_puts(p, "cpu ");
	122	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user));
	123	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice));
	124	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system));
	125	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle));
	126	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait));
	127	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq));
	128	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq));
	129	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
	130	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
	131	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
	132	seq_putc(p, '\n');
	133
df8106db	134	for_each_online_cpu(i) {
df8106db	135	/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
3292beb3 GC	136	user = kcpustat_cpu(i).cpustat[CPUTIME_USER];
	137	nice = kcpustat_cpu(i).cpustat[CPUTIME_NICE];
	138	system = kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM];
a25cac51 MH	139	idle = get_idle_time(i);
a25cac51 MH	140	iowait = get_iowait_time(i);
3292beb3 GC	141	irq = kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
	142	softirq = kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ];
	143	steal = kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
	144	guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
	145	guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
1ac101a5 KH	146	seq_printf(p, "cpu%d", i);
	147	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(user));
	148	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(nice));
	149	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(system));
	150	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(idle));
	151	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(iowait));
	152	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(irq));
	153	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(softirq));
	154	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(steal));
	155	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest));
	156	seq_put_decimal_ull(p, ' ', cputime64_to_clock_t(guest_nice));
	157	seq_putc(p, '\n');
df8106db AD	158	}
	159	seq_printf(p, "intr %llu", (unsigned long long)sum);
	160
	161	/* sum again ? it could be updated? */
478735e3	162	for_each_irq_nr(j)
1ac101a5	163	seq_put_decimal_ull(p, ' ', kstat_irqs(j));
df8106db AD	164
	165	seq_printf(p,
	166	"\nctxt %llu\n"
	167	"btime %lu\n"
	168	"processes %lu\n"
	169	"procs_running %lu\n"
	170	"procs_blocked %lu\n",
	171	nr_context_switches(),
	172	(unsigned long)jif,
	173	total_forks,
	174	nr_running(),
	175	nr_iowait());
	176
d3d64df2 KK	177	seq_printf(p, "softirq %llu", (unsigned long long)sum_softirq);
	178
	179	for (i = 0; i < NR_SOFTIRQS; i++)
1ac101a5	180	seq_put_decimal_ull(p, ' ', per_softirq_sums[i]);
9d6de12f	181	seq_putc(p, '\n');
d3d64df2	182
df8106db AD	183	return 0;
	184	}
	185
	186	static int stat_open(struct inode inode, struct file file)
	187	{
9e5e8dec	188	size_t size = 1024 + 128 * num_possible_cpus();
df8106db AD	189	char *buf;
	190	struct seq_file *m;
	191	int res;
	192
59a32e2c ED	193	/* minimum size to display an interrupt count : 2 bytes */
	194	size += 2 * nr_irqs;
	195
a4dbf0ec	196	/* don't ask for more than the kmalloc() max size */
6fa3eb70 S	197	//if (size > KMALLOC_MAX_SIZE)
	198	// size = KMALLOC_MAX_SIZE;
	199	//buf = kmalloc(size, GFP_KERNEL);
	200	buf = vmalloc(size);
df8106db AD	201	if (!buf)
	202	return -ENOMEM;
	203
	204	res = single_open(file, show_stat, NULL);
	205	if (!res) {
	206	m = file->private_data;
	207	m->buf = buf;
6fa3eb70 S	208	//m->size = ksize(buf);
6fa3eb70 S	209	m->size = size;
df8106db	210	} else
6fa3eb70 S	211	//kfree(buf);
6fa3eb70 S	212	vfree(buf);
df8106db AD	213	return res;
	214	}
	215
	216	static const struct file_operations proc_stat_operations = {
	217	.open = stat_open,
	218	.read = seq_read,
	219	.llseek = seq_lseek,
	220	.release = single_release,
	221	};
	222
	223	static int __init proc_stat_init(void)
	224	{
	225	proc_create("stat", 0, NULL, &proc_stat_operations);
	226	return 0;
	227	}
	228	module_init(proc_stat_init);