Commit | Line | Data |
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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" |
16 | #include "cpu_buffer.h" | |
6a18037d | 17 | |
1da177e4 | 18 | struct oprofile_stat_struct oprofile_stats; |
4d4036e0 JY |
19 | #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX |
20 | atomic_t multiplex_counter; | |
21 | #endif | |
6a18037d | 22 | |
1da177e4 LT |
23 | void oprofile_reset_stats(void) |
24 | { | |
25ad2913 | 25 | struct oprofile_cpu_buffer *cpu_buf; |
1da177e4 | 26 | int i; |
6a18037d | 27 | |
fe449f48 | 28 | for_each_possible_cpu(i) { |
608dfddd | 29 | cpu_buf = &per_cpu(cpu_buffer, i); |
1da177e4 LT |
30 | cpu_buf->sample_received = 0; |
31 | cpu_buf->sample_lost_overflow = 0; | |
df9d177a PE |
32 | cpu_buf->backtrace_aborted = 0; |
33 | cpu_buf->sample_invalid_eip = 0; | |
1da177e4 | 34 | } |
6a18037d | 35 | |
1da177e4 LT |
36 | atomic_set(&oprofile_stats.sample_lost_no_mm, 0); |
37 | atomic_set(&oprofile_stats.sample_lost_no_mapping, 0); | |
38 | atomic_set(&oprofile_stats.event_lost_overflow, 0); | |
2b8777ca | 39 | atomic_set(&oprofile_stats.bt_lost_no_mapping, 0); |
4d4036e0 JY |
40 | #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX |
41 | atomic_set(&multiplex_counter, 0); | |
42 | #endif | |
1da177e4 LT |
43 | } |
44 | ||
45 | ||
25ad2913 | 46 | void oprofile_create_stats_files(struct super_block *sb, struct dentry *root) |
1da177e4 | 47 | { |
25ad2913 RR |
48 | struct oprofile_cpu_buffer *cpu_buf; |
49 | struct dentry *cpudir; | |
50 | struct dentry *dir; | |
1da177e4 LT |
51 | char buf[10]; |
52 | int i; | |
53 | ||
54 | dir = oprofilefs_mkdir(sb, root, "stats"); | |
55 | if (!dir) | |
56 | return; | |
57 | ||
fe449f48 | 58 | for_each_possible_cpu(i) { |
608dfddd | 59 | cpu_buf = &per_cpu(cpu_buffer, i); |
1da177e4 LT |
60 | snprintf(buf, 10, "cpu%d", i); |
61 | cpudir = oprofilefs_mkdir(sb, dir, buf); | |
6a18037d | 62 | |
1da177e4 LT |
63 | /* Strictly speaking access to these ulongs is racy, |
64 | * but we can't simply lock them, and they are | |
65 | * informational only. | |
66 | */ | |
67 | oprofilefs_create_ro_ulong(sb, cpudir, "sample_received", | |
68 | &cpu_buf->sample_received); | |
69 | oprofilefs_create_ro_ulong(sb, cpudir, "sample_lost_overflow", | |
70 | &cpu_buf->sample_lost_overflow); | |
71 | oprofilefs_create_ro_ulong(sb, cpudir, "backtrace_aborted", | |
72 | &cpu_buf->backtrace_aborted); | |
df9d177a PE |
73 | oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip", |
74 | &cpu_buf->sample_invalid_eip); | |
1da177e4 | 75 | } |
6a18037d | 76 | |
1da177e4 LT |
77 | oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mm", |
78 | &oprofile_stats.sample_lost_no_mm); | |
79 | oprofilefs_create_ro_atomic(sb, dir, "sample_lost_no_mapping", | |
80 | &oprofile_stats.sample_lost_no_mapping); | |
81 | oprofilefs_create_ro_atomic(sb, dir, "event_lost_overflow", | |
82 | &oprofile_stats.event_lost_overflow); | |
83 | oprofilefs_create_ro_atomic(sb, dir, "bt_lost_no_mapping", | |
84 | &oprofile_stats.bt_lost_no_mapping); | |
4d4036e0 JY |
85 | #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX |
86 | oprofilefs_create_ro_atomic(sb, dir, "multiplex_counter", | |
87 | &multiplex_counter); | |
88 | #endif | |
1da177e4 | 89 | } |