include/asm-ia64/perfmon_default_smpl.h

   1 /*
   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  */
  17 typedef 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  */
  28 typedef 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  */
  37 typedef 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  */
  61 typedef 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
  70         unsigned short  cpu;                    /* cpu on which the overfow occured */
  71         unsigned short  set;                    /* event set active when overflow ocurred   */
  72         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__ */