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>
14
15#include "oprofile_stats.h"
16#include "cpu_buffer.h"
17
18struct oprofile_stat_struct oprofile_stats;
19
20void oprofile_reset_stats(void)
21{
22 struct oprofile_cpu_buffer *cpu_buf;
23 int i;
24
25 for_each_possible_cpu(i) {
26 cpu_buf = &per_cpu(op_cpu_buffer, i);
27 cpu_buf->sample_received = 0;
28 cpu_buf->sample_lost_overflow = 0;
29 cpu_buf->backtrace_aborted = 0;
30 cpu_buf->sample_invalid_eip = 0;
31 }
32
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 atomic_set(&oprofile_stats.bt_lost_no_mapping, 0);
37 atomic_set(&oprofile_stats.multiplex_counter, 0);
38}
39
40
41void oprofile_create_stats_files(struct dentry *root)
42{
43 struct oprofile_cpu_buffer *cpu_buf;
44 struct dentry *cpudir;
45 struct dentry *dir;
46 char buf[10];
47 int i;
48
49 dir = oprofilefs_mkdir(root, "stats");
50 if (!dir)
51 return;
52
53 for_each_possible_cpu(i) {
54 cpu_buf = &per_cpu(op_cpu_buffer, i);
55 snprintf(buf, 10, "cpu%d", i);
56 cpudir = oprofilefs_mkdir(dir, buf);
57
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(cpudir, "sample_received",
63 &cpu_buf->sample_received);
64 oprofilefs_create_ro_ulong(cpudir, "sample_lost_overflow",
65 &cpu_buf->sample_lost_overflow);
66 oprofilefs_create_ro_ulong(cpudir, "backtrace_aborted",
67 &cpu_buf->backtrace_aborted);
68 oprofilefs_create_ro_ulong(cpudir, "sample_invalid_eip",
69 &cpu_buf->sample_invalid_eip);
70 }
71
72 oprofilefs_create_ro_atomic(dir, "sample_lost_no_mm",
73 &oprofile_stats.sample_lost_no_mm);
74 oprofilefs_create_ro_atomic(dir, "sample_lost_no_mapping",
75 &oprofile_stats.sample_lost_no_mapping);
76 oprofilefs_create_ro_atomic(dir, "event_lost_overflow",
77 &oprofile_stats.event_lost_overflow);
78 oprofilefs_create_ro_atomic(dir, "bt_lost_no_mapping",
79 &oprofile_stats.bt_lost_no_mapping);
80#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
81 oprofilefs_create_ro_atomic(dir, "multiplex_counter",
82 &oprofile_stats.multiplex_counter);
83#endif
84}
85