Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Robert Richter | 6a18037 | 2008-10-16 15:01:40 +0200 | [diff] [blame] | 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include "oprofile_stats.h" |
| 16 | #include "cpu_buffer.h" |
Robert Richter | 6a18037 | 2008-10-16 15:01:40 +0200 | [diff] [blame] | 17 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | struct oprofile_stat_struct oprofile_stats; |
Jason Yeh | 4d4036e | 2009-07-08 13:49:38 +0200 | [diff] [blame] | 19 | #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX |
| 20 | atomic_t multiplex_counter; |
| 21 | #endif |
Robert Richter | 6a18037 | 2008-10-16 15:01:40 +0200 | [diff] [blame] | 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | void oprofile_reset_stats(void) |
| 24 | { |
Robert Richter | 25ad2913 | 2008-09-05 17:12:36 +0200 | [diff] [blame] | 25 | struct oprofile_cpu_buffer *cpu_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | int i; |
Robert Richter | 6a18037 | 2008-10-16 15:01:40 +0200 | [diff] [blame] | 27 | |
KAMEZAWA Hiroyuki | fe449f4 | 2006-03-28 01:56:38 -0800 | [diff] [blame] | 28 | for_each_possible_cpu(i) { |
Mike Travis | 608dfdd | 2008-04-28 02:14:15 -0700 | [diff] [blame] | 29 | cpu_buf = &per_cpu(cpu_buffer, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | cpu_buf->sample_received = 0; |
| 31 | cpu_buf->sample_lost_overflow = 0; |
Philippe Elie | df9d177 | 2007-11-14 16:58:48 -0800 | [diff] [blame] | 32 | cpu_buf->backtrace_aborted = 0; |
| 33 | cpu_buf->sample_invalid_eip = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | } |
Robert Richter | 6a18037 | 2008-10-16 15:01:40 +0200 | [diff] [blame] | 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Maynard Johnson | 2b8777c | 2009-05-27 10:15:08 -0500 | [diff] [blame] | 39 | atomic_set(&oprofile_stats.bt_lost_no_mapping, 0); |
Jason Yeh | 4d4036e | 2009-07-08 13:49:38 +0200 | [diff] [blame] | 40 | #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX |
| 41 | atomic_set(&multiplex_counter, 0); |
| 42 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | |
Robert Richter | 25ad2913 | 2008-09-05 17:12:36 +0200 | [diff] [blame] | 46 | void oprofile_create_stats_files(struct super_block *sb, struct dentry *root) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | { |
Robert Richter | 25ad2913 | 2008-09-05 17:12:36 +0200 | [diff] [blame] | 48 | struct oprofile_cpu_buffer *cpu_buf; |
| 49 | struct dentry *cpudir; |
| 50 | struct dentry *dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | char buf[10]; |
| 52 | int i; |
| 53 | |
| 54 | dir = oprofilefs_mkdir(sb, root, "stats"); |
| 55 | if (!dir) |
| 56 | return; |
| 57 | |
KAMEZAWA Hiroyuki | fe449f4 | 2006-03-28 01:56:38 -0800 | [diff] [blame] | 58 | for_each_possible_cpu(i) { |
Mike Travis | 608dfdd | 2008-04-28 02:14:15 -0700 | [diff] [blame] | 59 | cpu_buf = &per_cpu(cpu_buffer, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | snprintf(buf, 10, "cpu%d", i); |
| 61 | cpudir = oprofilefs_mkdir(sb, dir, buf); |
Robert Richter | 6a18037 | 2008-10-16 15:01:40 +0200 | [diff] [blame] | 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Philippe Elie | df9d177 | 2007-11-14 16:58:48 -0800 | [diff] [blame] | 73 | oprofilefs_create_ro_ulong(sb, cpudir, "sample_invalid_eip", |
| 74 | &cpu_buf->sample_invalid_eip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | } |
Robert Richter | 6a18037 | 2008-10-16 15:01:40 +0200 | [diff] [blame] | 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Jason Yeh | 4d4036e | 2009-07-08 13:49:38 +0200 | [diff] [blame] | 85 | #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX |
| 86 | oprofilefs_create_ro_atomic(sb, dir, "multiplex_counter", |
| 87 | &multiplex_counter); |
| 88 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | } |