Return bool from reset_alarm_* apis.
[akaros.git] / kern / src / oprofile / oprofile_stats.c
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 }