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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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