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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) 2002-2003 Hewlett-Packard Co
3 * Stephane Eranian <eranian@hpl.hp.com>
4 *
5 * This file implements the default sampling buffer format
6 * for Linux/ia64 perfmon subsystem.
7 */
8#ifndef __PERFMON_DEFAULT_SMPL_H__
9#define __PERFMON_DEFAULT_SMPL_H__ 1
10
11#define PFM_DEFAULT_SMPL_UUID { \
12 0x4d, 0x72, 0xbe, 0xc0, 0x06, 0x64, 0x41, 0x43, 0x82, 0xb4, 0xd3, 0xfd, 0x27, 0x24, 0x3c, 0x97}
13
14/*
15 * format specific parameters (passed at context creation)
16 */
17typedef struct {
18 unsigned long buf_size; /* size of the buffer in bytes */
19 unsigned int flags; /* buffer specific flags */
20 unsigned int res1; /* for future use */
21 unsigned long reserved[2]; /* for future use */
22} pfm_default_smpl_arg_t;
23
24/*
25 * combined context+format specific structure. Can be passed
26 * to PFM_CONTEXT_CREATE
27 */
28typedef struct {
29 pfarg_context_t ctx_arg;
30 pfm_default_smpl_arg_t buf_arg;
31} pfm_default_smpl_ctx_arg_t;
32
33/*
34 * This header is at the beginning of the sampling buffer returned to the user.
35 * It is directly followed by the first record.
36 */
37typedef struct {
38 unsigned long hdr_count; /* how many valid entries */
39 unsigned long hdr_cur_offs; /* current offset from top of buffer */
40 unsigned long hdr_reserved2; /* reserved for future use */
41
42 unsigned long hdr_overflows; /* how many times the buffer overflowed */
43 unsigned long hdr_buf_size; /* how many bytes in the buffer */
44
45 unsigned int hdr_version; /* contains perfmon version (smpl format diffs) */
46 unsigned int hdr_reserved1; /* for future use */
47 unsigned long hdr_reserved[10]; /* for future use */
48} pfm_default_smpl_hdr_t;
49
50/*
51 * Entry header in the sampling buffer. The header is directly followed
52 * with the values of the PMD registers of interest saved in increasing
53 * index order: PMD4, PMD5, and so on. How many PMDs are present depends
54 * on how the session was programmed.
55 *
56 * In the case where multiple counters overflow at the same time, multiple
57 * entries are written consecutively.
58 *
59 * last_reset_value member indicates the initial value of the overflowed PMD.
60 */
61typedef struct {
62 int pid; /* thread id (for NPTL, this is gettid()) */
63 unsigned char reserved1[3]; /* reserved for future use */
64 unsigned char ovfl_pmd; /* index of overflowed PMD */
65
66 unsigned long last_reset_val; /* initial value of overflowed PMD */
67 unsigned long ip; /* where did the overflow interrupt happened */
68 unsigned long tstamp; /* ar.itc when entering perfmon intr. handler */
69
Lucas De Marchi25985ed2011-03-30 22:57:33 -030070 unsigned short cpu; /* cpu on which the overflow occurred */
71 unsigned short set; /* event set active when overflow occurred */
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 int tgid; /* thread group id (for NPTL, this is getpid()) */
73} pfm_default_smpl_entry_t;
74
75#define PFM_DEFAULT_MAX_PMDS 64 /* how many pmds supported by data structures (sizeof(unsigned long) */
76#define PFM_DEFAULT_MAX_ENTRY_SIZE (sizeof(pfm_default_smpl_entry_t)+(sizeof(unsigned long)*PFM_DEFAULT_MAX_PMDS))
77#define PFM_DEFAULT_SMPL_MIN_BUF_SIZE (sizeof(pfm_default_smpl_hdr_t)+PFM_DEFAULT_MAX_ENTRY_SIZE)
78
79#define PFM_DEFAULT_SMPL_VERSION_MAJ 2U
80#define PFM_DEFAULT_SMPL_VERSION_MIN 0U
81#define PFM_DEFAULT_SMPL_VERSION (((PFM_DEFAULT_SMPL_VERSION_MAJ&0xffff)<<16)|(PFM_DEFAULT_SMPL_VERSION_MIN & 0xffff))
82
83#endif /* __PERFMON_DEFAULT_SMPL_H__ */