perfmon.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:6k
- /*
- * Copyright (C) 2001-2002 Hewlett-Packard Co
- * Stephane Eranian <eranian@hpl.hp.com>
- */
- #ifndef _ASM_IA64_PERFMON_H
- #define _ASM_IA64_PERFMON_H
- /*
- * perfmon comamnds supported on all CPU models
- */
- #define PFM_WRITE_PMCS 0x01
- #define PFM_WRITE_PMDS 0x02
- #define PFM_READ_PMDS 0x03
- #define PFM_STOP 0x04
- #define PFM_START 0x05
- #define PFM_ENABLE 0x06
- #define PFM_DISABLE 0x07
- #define PFM_CREATE_CONTEXT 0x08
- #define PFM_DESTROY_CONTEXT 0x09
- #define PFM_RESTART 0x0a
- #define PFM_PROTECT_CONTEXT 0x0b
- #define PFM_GET_FEATURES 0x0c
- #define PFM_DEBUG 0x0d
- #define PFM_UNPROTECT_CONTEXT 0x0e
- #define PFM_GET_PMC_RESET_VAL 0x0f
- /*
- * CPU model specific commands (may not be supported on all models)
- */
- #define PFM_WRITE_IBRS 0x20
- #define PFM_WRITE_DBRS 0x21
- /*
- * context flags
- */
- #define PFM_FL_INHERIT_NONE 0x00 /* never inherit a context across fork (default) */
- #define PFM_FL_INHERIT_ONCE 0x01 /* clone pfm_context only once across fork() */
- #define PFM_FL_INHERIT_ALL 0x02 /* always clone pfm_context across fork() */
- #define PFM_FL_NOTIFY_BLOCK 0x04 /* block task on user level notifications */
- #define PFM_FL_SYSTEM_WIDE 0x08 /* create a system wide context */
- /*
- * PMC flags
- */
- #define PFM_REGFL_OVFL_NOTIFY 0x1 /* send notification on overflow */
- /*
- * PMD/PMC/IBR/DBR return flags (ignored on input)
- *
- * Those flags are used on output and must be checked in case EAGAIN is returned
- * by any of the calls using a pfarg_reg_t or pfarg_dbreg_t structure.
- */
- #define PFM_REG_RETFL_NOTAVAIL (1U<<31) /* set if register is implemented but not available */
- #define PFM_REG_RETFL_EINVAL (1U<<30) /* set if register entry is invalid */
- #define PFM_REG_RETFL_MASK (PFM_REG_RETFL_NOTAVAIL|PFM_REG_RETFL_EINVAL)
- #define PFM_REG_HAS_ERROR(flag) (((flag) & PFM_REG_RETFL_MASK) != 0)
- /*
- * Request structure used to define a context
- */
- typedef struct {
- unsigned long ctx_smpl_entries; /* how many entries in sampling buffer */
- unsigned long ctx_smpl_regs[4]; /* which pmds to record on overflow */
- pid_t ctx_notify_pid; /* which process to notify on overflow */
- int ctx_flags; /* noblock/block, inherit flags */
- void *ctx_smpl_vaddr; /* returns address of BTB buffer */
- unsigned long ctx_cpu_mask; /* on which CPU to enable perfmon (systemwide) */
- unsigned long reserved[8]; /* for future use */
- } pfarg_context_t;
- /*
- * Request structure used to write/read a PMC or PMD
- */
- typedef struct {
- unsigned int reg_num; /* which register */
- unsigned int reg_flags; /* PMC: notify/don't notify. PMD/PMC: return flags */
- unsigned long reg_value; /* configuration (PMC) or initial value (PMD) */
- unsigned long reg_long_reset; /* reset after sampling buffer overflow (large) */
- unsigned long reg_short_reset;/* reset after counter overflow (small) */
- unsigned long reg_reset_pmds[4]; /* which other counters to reset on overflow */
- unsigned long reserved[16]; /* for future use */
- } pfarg_reg_t;
- typedef struct {
- unsigned int dbreg_num; /* which register */
- unsigned int dbreg_flags; /* dbregs return flags */
- unsigned long dbreg_value; /* configuration (PMC) or initial value (PMD) */
- unsigned long reserved[6];
- } pfarg_dbreg_t;
- typedef struct {
- unsigned int ft_version; /* perfmon: major [16-31], minor [0-15] */
- unsigned int ft_smpl_version;/* sampling format: major [16-31], minor [0-15] */
- unsigned long reserved[4]; /* for future use */
- } pfarg_features_t;
- /*
- * This header is at the beginning of the sampling buffer returned to the user.
- * It is exported as Read-Only at this point. It is directly followed by the
- * first record.
- */
- typedef struct {
- unsigned int hdr_version; /* contains perfmon version (smpl format diffs) */
- unsigned int reserved;
- unsigned long hdr_entry_size; /* size of one entry in bytes */
- unsigned long hdr_count; /* how many valid entries */
- unsigned long hdr_pmds[4]; /* which pmds are recorded */
- } perfmon_smpl_hdr_t;
- /*
- * Define the version numbers for both perfmon as a whole and the sampling buffer format.
- */
- #define PFM_VERSION_MAJ 1U
- #define PFM_VERSION_MIN 0U
- #define PFM_VERSION (((PFM_VERSION_MAJ&0xffff)<<16)|(PFM_VERSION_MIN & 0xffff))
- #define PFM_SMPL_VERSION_MAJ 1U
- #define PFM_SMPL_VERSION_MIN 0U
- #define PFM_SMPL_VERSION (((PFM_SMPL_VERSION_MAJ&0xffff)<<16)|(PFM_SMPL_VERSION_MIN & 0xffff))
- #define PFM_VERSION_MAJOR(x) (((x)>>16) & 0xffff)
- #define PFM_VERSION_MINOR(x) ((x) & 0xffff)
- /*
- * Entry header in the sampling buffer.
- * The header is directly followed with the PMDS saved in increasing index
- * order: PMD4, PMD5, .... How many PMDs are present is determined by the
- * user program during context creation.
- *
- * XXX: in this version of the entry, only up to 64 registers can be recorded
- * This should be enough for quite some time. Always check sampling format
- * before parsing entries!
- *
- * Inn the case where multiple counters have overflowed at the same time, the
- * rate field indicate the initial value of the first PMD, based on the index.
- * For instance, if PMD2 and PMD5 have ovewrflowed for this entry, the rate field
- * will show the initial value of PMD2.
- */
- typedef struct {
- int pid; /* identification of process */
- int cpu; /* which cpu was used */
- unsigned long rate; /* initial value of overflowed counter */
- unsigned long stamp; /* timestamp */
- unsigned long ip; /* where did the overflow interrupt happened */
- unsigned long regs; /* bitmask of which registers overflowed */
- unsigned long period; /* sampling period used by overflowed counter (smallest pmd index) */
- } perfmon_smpl_entry_t;
- extern int perfmonctl(pid_t pid, int cmd, void *arg, int narg);
- #ifdef __KERNEL__
- extern void pfm_save_regs (struct task_struct *);
- extern void pfm_load_regs (struct task_struct *);
- extern int pfm_inherit (struct task_struct *, struct pt_regs *);
- extern void pfm_context_exit (struct task_struct *);
- extern void pfm_flush_regs (struct task_struct *);
- extern void pfm_cleanup_notifiers (struct task_struct *);
- extern void pfm_cleanup_owners (struct task_struct *);
- extern int pfm_use_debug_registers(struct task_struct *);
- extern int pfm_release_debug_registers(struct task_struct *);
- extern int pfm_cleanup_smpl_buf(struct task_struct *);
- extern void pfm_syst_wide_update_task(struct task_struct *, int);
- extern void perfmon_init_percpu(void);
- #endif /* __KERNEL__ */
- #endif /* _ASM_IA64_PERFMON_H */