[net-next-2.6.git] / drivers / oprofile / oprofile_stats.c

/**
 * @file oprofile_stats.c
 *
 * @remark Copyright 2002 OProfile authors
 * @remark Read the file COPYING
 *
 * @author John Levon
 */

#include <linux/oprofile.h>
#include <linux/smp.h>
#include <linux/cpumask.h>
#include <linux/threads.h>

#include "oprofile_stats.h"
#include "cpu_buffer.h"

struct oprofile_stat_struct oprofile_stats;

void oprofile_reset_stats(void)
{
	struct oprofile_cpu_buffer *cpu_buf;
	int i;

	for_each_possible_cpu(i) {
		cpu_buf = &per_cpu(op_cpu_buffer, i);
		cpu_buf->sample_received = 0;
		cpu_buf->sample_lost_overflow = 0;
		cpu_buf->backtrace_aborted = 0;
		cpu_buf->sample_invalid_eip = 0;
	}

	atomic_set(&oprofile_stats.sample_lost_no_mm, 0);
	atomic_set(&oprofile_stats.sample_lost_no_mapping, 0);
	atomic_set(&oprofile_stats.event_lost_overflow, 0);
	atomic_set(&oprofile_stats.bt_lost_no_mapping, 0);
	atomic_set(&oprofile_stats.multiplex_counter, 0);
}


void oprofile_create_stats_files(struct super_block *sb, struct dentry *root)
{
	struct oprofile_cpu_buffer *cpu_buf;
	struct dentry *cpudir;
	struct dentry *dir;
	char buf[10];
	int i;

	dir = oprofilefs_mkdir(sb, root, "stats");
	if (!dir)
		return;

	for_each_possible_cpu(i) {
		cpu_buf = &per_cpu(op_cpu_buffer, i);
		snprintf(buf, 10, "cpu%d", i);
		cpudir = oprofilefs_mkdir(sb, dir, buf);

		/* Strictly speaking access to these ulongs is racy,
		 * but we can't simply lock them, and they are
		 * informational only.
		 */
		oprofilefs_create_ro_ulong(sb, cpudir, "sample_received",
			&cpu_buf->sample_received);
		oprofilefs_create_ro_ulong(sb, cpudir, "sample_lost_overflow",
			&cpu_buf->sample_lost_overflow);
		oprofilefs_create_ro_ulong(sb, cpudir, "backtrace_aborted",
			&cpu_buf->backtrace_aborted);
		oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip",
			&cpu_buf->sample_invalid_eip);
	}

	oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mm",
		&oprofile_stats.sample_lost_no_mm);
	oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mapping",
		&oprofile_stats.sample_lost_no_mapping);
	oprofilefs_create_ro_atomic(sb, dir, "event_lost_overflow",
		&oprofile_stats.event_lost_overflow);
	oprofilefs_create_ro_atomic(sb, dir, "bt_lost_no_mapping",
		&oprofile_stats.bt_lost_no_mapping);
#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
	oprofilefs_create_ro_atomic(sb, dir, "multiplex_counter",
		&oprofile_stats.multiplex_counter);
#endif
}
Commit	Line	Data
1da177e4 LT	1	/**
	2	* @file oprofile_stats.c
	3	*
	4	* @remark Copyright 2002 OProfile authors
	5	* @remark Read the file COPYING
	6	*
	7	* @author John Levon
	8	*/
	9
	10	#include <linux/oprofile.h>
	11	#include <linux/smp.h>
	12	#include <linux/cpumask.h>
	13	#include <linux/threads.h>
6a18037d	14
1da177e4 LT	15	#include "oprofile_stats.h"
1da177e4 LT	16	#include "cpu_buffer.h"
6a18037d	17
1da177e4	18	struct oprofile_stat_struct oprofile_stats;
6a18037d	19
1da177e4 LT	20	void oprofile_reset_stats(void)
1da177e4 LT	21	{
25ad2913	22	struct oprofile_cpu_buffer *cpu_buf;
1da177e4	23	int i;
6a18037d	24
fe449f48	25	for_each_possible_cpu(i) {
b3e9f672	26	cpu_buf = &per_cpu(op_cpu_buffer, i);
1da177e4 LT	27	cpu_buf->sample_received = 0;
1da177e4 LT	28	cpu_buf->sample_lost_overflow = 0;
df9d177a PE	29	cpu_buf->backtrace_aborted = 0;
df9d177a PE	30	cpu_buf->sample_invalid_eip = 0;
1da177e4	31	}
6a18037d	32
1da177e4 LT	33	atomic_set(&oprofile_stats.sample_lost_no_mm, 0);
	34	atomic_set(&oprofile_stats.sample_lost_no_mapping, 0);
	35	atomic_set(&oprofile_stats.event_lost_overflow, 0);
2b8777ca	36	atomic_set(&oprofile_stats.bt_lost_no_mapping, 0);
1b294f59	37	atomic_set(&oprofile_stats.multiplex_counter, 0);
1da177e4 LT	38	}
	39
	40
25ad2913	41	void oprofile_create_stats_files(struct super_block sb, struct dentry root)
1da177e4	42	{
25ad2913 RR	43	struct oprofile_cpu_buffer *cpu_buf;
	44	struct dentry *cpudir;
	45	struct dentry *dir;
1da177e4 LT	46	char buf[10];
	47	int i;
	48
	49	dir = oprofilefs_mkdir(sb, root, "stats");
	50	if (!dir)
	51	return;
	52
fe449f48	53	for_each_possible_cpu(i) {
b3e9f672	54	cpu_buf = &per_cpu(op_cpu_buffer, i);
1da177e4 LT	55	snprintf(buf, 10, "cpu%d", i);
1da177e4 LT	56	cpudir = oprofilefs_mkdir(sb, dir, buf);
6a18037d	57
1da177e4 LT	58	/* Strictly speaking access to these ulongs is racy,
	59	* but we can't simply lock them, and they are
	60	* informational only.
	61	*/
	62	oprofilefs_create_ro_ulong(sb, cpudir, "sample_received",
	63	&cpu_buf->sample_received);
	64	oprofilefs_create_ro_ulong(sb, cpudir, "sample_lost_overflow",
	65	&cpu_buf->sample_lost_overflow);
	66	oprofilefs_create_ro_ulong(sb, cpudir, "backtrace_aborted",
	67	&cpu_buf->backtrace_aborted);
df9d177a PE	68	oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip",
df9d177a PE	69	&cpu_buf->sample_invalid_eip);
1da177e4	70	}
6a18037d	71
1da177e4 LT	72	oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mm",
	73	&oprofile_stats.sample_lost_no_mm);
	74	oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mapping",
	75	&oprofile_stats.sample_lost_no_mapping);
	76	oprofilefs_create_ro_atomic(sb, dir, "event_lost_overflow",
	77	&oprofile_stats.event_lost_overflow);
	78	oprofilefs_create_ro_atomic(sb, dir, "bt_lost_no_mapping",
	79	&oprofile_stats.bt_lost_no_mapping);
4d4036e0 JY	80	#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
4d4036e0 JY	81	oprofilefs_create_ro_atomic(sb, dir, "multiplex_counter",
1b294f59	82	&oprofile_stats.multiplex_counter);
4d4036e0	83	#endif
1da177e4	84	}