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Linux kernel mirror (for testing)
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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 = &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}
37
38
39void oprofile_create_stats_files(struct super_block * sb, struct dentry * root)
40{
41 struct oprofile_cpu_buffer * cpu_buf;
42 struct dentry * cpudir;
43 struct dentry * dir;
44 char buf[10];
45 int i;
46
47 dir = oprofilefs_mkdir(sb, root, "stats");
48 if (!dir)
49 return;
50
51 for_each_possible_cpu(i) {
52 cpu_buf = &cpu_buffer[i];
53 snprintf(buf, 10, "cpu%d", i);
54 cpudir = oprofilefs_mkdir(sb, dir, buf);
55
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);
66 oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip",
67 &cpu_buf->sample_invalid_eip);
68 }
69
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}