134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2013-2014 Uladzimir Pylinsky aka barthess
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include <string.h>
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#include "ch.h"
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#include "hal.h"
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#include "membench.h"
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#include "memcpy_dma.h"
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/*
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******************************************************************************
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* DEFINES
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******************************************************************************
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*/
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/*
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******************************************************************************
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* EXTERNS
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******************************************************************************
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*/
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/*
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******************************************************************************
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* PROTOTYPES
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******************************************************************************
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*/
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/*
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******************************************************************************
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* GLOBAL VARIABLES
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******************************************************************************
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*/
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volatile int warning_suppressor;
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/*
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******************************************************************************
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******************************************************************************
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* LOCAL FUNCTIONS
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******************************************************************************
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******************************************************************************
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*/
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/*
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* Calculates memory access time in MiB/s.
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*/
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double speed_mibps(const time_measurement_t *tmu, size_t len) {
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double size; // MiB
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double time; // sec
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size = len;
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size /= 1024 * 1024;
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time = tmu->last;
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time /= STM32_SYSCLK;
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return size / time;
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}
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/*
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* Calculates memory access time in B/s.
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*/
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uint32_t speed_bps(const time_measurement_t *tmu, size_t len) {
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uint64_t tmp = len;
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tmp *= STM32_SYSCLK;
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return tmp / tmu->last;
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}
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/*
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******************************************************************************
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* EXPORTED FUNCTIONS
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******************************************************************************
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*/
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/*
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*
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*/
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void membench_run(membench_t *dest, const membench_t *src,
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membench_result_t *result) {
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time_measurement_t mem_tmu;
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size_t len;
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if (src->size < dest->size)
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len = src->size;
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else
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len = dest->size;
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/* memset */
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chTMObjectInit(&mem_tmu);
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chTMStartMeasurementX(&mem_tmu);
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memset(dest->start, 0x55, dest->size);
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chTMStopMeasurementX(&mem_tmu);
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result->memset = speed_bps(&mem_tmu, dest->size);
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/* memcpy */
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chTMObjectInit(&mem_tmu);
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chTMStartMeasurementX(&mem_tmu);
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memcpy(dest->start, src->start, len);
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chTMStopMeasurementX(&mem_tmu);
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result->memcpy = speed_bps(&mem_tmu, len);
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/* memcmp */
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chTMObjectInit(&mem_tmu);
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chTMStartMeasurementX(&mem_tmu);
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warning_suppressor = memcmp(dest->start, src->start, len);
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chTMStopMeasurementX(&mem_tmu);
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result->memcmp = speed_bps(&mem_tmu, len);
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/* memcpy DMA */
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memcpy_dma_start();
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chTMObjectInit(&mem_tmu);
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chTMStartMeasurementX(&mem_tmu);
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memcpy_dma(dest->start, src->start, len);
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chTMStopMeasurementX(&mem_tmu);
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result->memcpy_dma = speed_bps(&mem_tmu, len);
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memcpy_dma_stop();
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}
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