83 lines
2 KiB
C
83 lines
2 KiB
C
/*
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* Copyright 2014, General Dynamics C4 Systems
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*
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* This software may be distributed and modified according to the terms of
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* the GNU General Public License version 2. Note that NO WARRANTY is provided.
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* See "LICENSE_GPLv2.txt" for details.
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*
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* @TAG(GD_GPL)
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*/
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/*
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* Profiler Interface
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*
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* 2006 - 2007 David Greenaway
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* 2007 Ported to seL4 C kernel by Philip Derrin
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*/
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#ifndef __MACHINE__PROFILER_H__
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#define __MACHINE__PROFILER_H__
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#include <machine/registerset.h>
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#include <machine/hardware.h>
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#ifdef PROFILER
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/* Approximate number of unique addresses that we can record.
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*
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* This value corresponds to the size of a hash table, and needs
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* to be a prime number to ensure correctness.
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*/
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//#define MAX_UNIQUE_INSTRUCTIONS ((256 * 1024) + 3) /* 262147 is prime */
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/* Downsized to fit in the default 1M kernel section - davec */
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#define MAX_UNIQUE_INSTRUCTIONS 94349
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#define MAX_UNIQUE_CHECKPOINTS 2000
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/* Record the given program counter */
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void profiler_record_sample(word_t pc) VISIBLE;
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/* Reset all counters */
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void profiler_reset(void);
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/* List the recorded values to stdout */
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void profiler_list(void);
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/* Should we be profiling the system? */
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extern bool_t profiler_enabled;
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/* Set the current status of the profiler */
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static inline void profiler_set_enabled(bool_t enabled)
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{
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profiler_enabled = enabled;
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}
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/* Get the current status of the profiler */
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static inline bool_t profiler_is_enabled(void)
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{
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return profiler_enabled;
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}
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/* Number of entries the profiler currently keeps track of */
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extern int profiler_num_entries;
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/* Number of instructions the profiler could not record */
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extern long long profiler_dropped_instructions;
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/* The instructions recorded by the profiler */
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typedef struct {
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word_t pc;
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word_t count;
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} profiler_entry_t;
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#ifdef CHECKPOINT_PROFILER
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extern volatile unsigned int checkpoint;
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extern profiler_entry_t profiler_entries[MAX_UNIQUE_CHECKPOINTS];
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#else
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extern profiler_entry_t profiler_entries[MAX_UNIQUE_INSTRUCTIONS];
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#endif
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#endif /* PROFILER */
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#endif /* !__MACHINE__PROFILER_H__ */
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