[linux-2.6-block.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(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);
}


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(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);
}
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) {
608dfddd	26	cpu_buf = &per_cpu(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);
	36	}
	37
	38
25ad2913	39	void oprofile_create_stats_files(struct super_block sb, struct dentry root)
1da177e4	40	{
25ad2913 RR	41	struct oprofile_cpu_buffer *cpu_buf;
	42	struct dentry *cpudir;
	43	struct dentry *dir;
1da177e4 LT	44	char buf[10];
	45	int i;
	46
	47	dir = oprofilefs_mkdir(sb, root, "stats");
	48	if (!dir)
	49	return;
	50
fe449f48	51	for_each_possible_cpu(i) {
608dfddd	52	cpu_buf = &per_cpu(cpu_buffer, i);
1da177e4 LT	53	snprintf(buf, 10, "cpu%d", i);
1da177e4 LT	54	cpudir = oprofilefs_mkdir(sb, dir, buf);
6a18037d	55
1da177e4 LT	56	/* Strictly speaking access to these ulongs is racy,
	57	* but we can't simply lock them, and they are
	58	* informational only.
	59	*/
	60	oprofilefs_create_ro_ulong(sb, cpudir, "sample_received",
	61	&cpu_buf->sample_received);
	62	oprofilefs_create_ro_ulong(sb, cpudir, "sample_lost_overflow",
	63	&cpu_buf->sample_lost_overflow);
	64	oprofilefs_create_ro_ulong(sb, cpudir, "backtrace_aborted",
	65	&cpu_buf->backtrace_aborted);
df9d177a PE	66	oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip",
df9d177a PE	67	&cpu_buf->sample_invalid_eip);
1da177e4	68	}
6a18037d	69
1da177e4 LT	70	oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mm",
	71	&oprofile_stats.sample_lost_no_mm);
	72	oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mapping",
	73	&oprofile_stats.sample_lost_no_mapping);
	74	oprofilefs_create_ro_atomic(sb, dir, "event_lost_overflow",
	75	&oprofile_stats.event_lost_overflow);
	76	oprofilefs_create_ro_atomic(sb, dir, "bt_lost_no_mapping",
	77	&oprofile_stats.bt_lost_no_mapping);
	78	}