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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 | |
18 | struct oprofile_stat_struct oprofile_stats; |
19 | |
20 | void 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 | |
41 | void oprofile_create_stats_files(struct super_block *sb, 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(sb, 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(sb, 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(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); |
68 | oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip", |
69 | &cpu_buf->sample_invalid_eip); |
70 | } |
71 | |
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); |
80 | #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX |
81 | oprofilefs_create_ro_atomic(sb, dir, "multiplex_counter", |
82 | &oprofile_stats.multiplex_counter); |
83 | #endif |
84 | } |
85 |
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