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Add basic profiler. (#20238)

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Nick Brassel 2023-04-06 08:10:40 +10:00 committed by GitHub
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// Copyright 2023 Nick Brassel (@tzarc)
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
/*
This API allows for basic profiling information to be printed out over console.
Usage example:
#include "basic_profiling.h"
// Original code:
matrix_task();
// Delete the original, replace with the following (variant 1, automatic naming):
PROFILE_CALL(1000, matrix_task());
// Delete the original, replace with the following (variant 2, explicit naming):
PROFILE_CALL_NAMED(1000, "matrix_task", {
matrix_task();
});
*/
#if defined(PROTOCOL_LUFA) || defined(PROTOCOL_VUSB)
# define TIMESTAMP_GETTER TCNT0
#elif defined(PROTOCOL_CHIBIOS)
# define TIMESTAMP_GETTER chSysGetRealtimeCounterX()
#elif defined(PROTOCOL_ARM_ATSAM)
# error arm_atsam not currently supported
#else
# error Unknown protocol in use
#endif
#ifndef CONSOLE_ENABLE
// Can't do anything if we don't have console output enabled.
# define PROFILE_CALL_NAMED(count, name, call) \
do { \
} while (0)
#else
# define PROFILE_CALL_NAMED(count, name, call) \
do { \
static uint64_t inner_sum = 0; \
static uint64_t outer_sum = 0; \
uint32_t start_ts; \
static uint32_t end_ts; \
static uint32_t write_location = 0; \
start_ts = TIMESTAMP_GETTER; \
if (write_location > 0) { \
outer_sum += start_ts - end_ts; \
} \
do { \
call; \
} while (0); \
end_ts = TIMESTAMP_GETTER; \
inner_sum += end_ts - start_ts; \
++write_location; \
if (write_location >= ((uint32_t)count)) { \
uint32_t inner_avg = inner_sum / (((uint32_t)count) - 1); \
uint32_t outer_avg = outer_sum / (((uint32_t)count) - 1); \
dprintf("%s -- Percentage time spent: %d%%\n", (name), (int)(inner_avg * 100 / (inner_avg + outer_avg))); \
inner_sum = 0; \
outer_sum = 0; \
write_location = 0; \
} \
} while (0)
#endif // CONSOLE_ENABLE
#define PROFILE_CALL(count, call) PROFILE_CALL_NAMED(count, #call, call)