79da079239
This commit also converts our own copyright headers to directly use SPDX, but leaves all other copyright header intact, only adding the SPDX ident. As far as possible this commit also merges multiple Data61 copyright statements/headers into one for consistency.
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/*
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* Copyright 2014, General Dynamics C4 Systems
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*
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* SPDX-License-Identifier: GPL-2.0-only
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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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