102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/* performance_test.c */
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/*
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This file is part of the ARM-Crypto-Lib.
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Copyright (C) 2006-2010 Daniel Otte (daniel.otte@rub.de)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* author: Daniel Otte
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* email: daniel.otte@rub.de
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* license: GPLv3
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*
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*
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**/
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#include <string.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include "hw_regs.h"
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#include "hw_gptm.h"
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#include "cli.h"
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#include "string-extras.h"
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#include "performance_test.h"
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static volatile uint32_t ovfcounter;
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static uint32_t const_overhead=0;
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static uint32_t int_overhead=0;
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void calibrateTimer(void){
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uint64_t t;
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startTimer(1);
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t=stopTimer();
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const_overhead = (uint32_t)t;
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}
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void initTimer(void){
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gptm_set_timer_32periodic(PERF_TIMER);
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}
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void startTimer(uint8_t granularity){
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gptm_stop_timer(PERF_TIMER, 0);
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gptm_write_timer(PERF_TIMER, 0, 0);
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if(granularity>0){
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gptm_set_timer_prescaler(PERF_TIMER, 0, granularity-1);
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gptm_start_timer(PERF_TIMER, 0);
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}else{
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gptm_set_timer_prescaler(PERF_TIMER, 0, 0);
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}
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}
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uint64_t stopTimer(void){
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gptm_stop_timer(PERF_TIMER, 0);
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uint64_t ret;
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ret = gptm_read_timer(PERF_TIMER, 0);
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ret -= const_overhead;
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ret -= ovfcounter * int_overhead;
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return ret;
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}
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void getOverhead(uint32_t* constoh, uint32_t* intoh){
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*constoh = const_overhead;
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*intoh = int_overhead;
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}
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void print_time(const char* s, uint64_t t){
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char sv[22];
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uint8_t c;
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cli_putstr("\r\n");
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cli_putstr(s);
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ulltoa(t, sv, 10);
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for(c=strlen(sv); c<11; ++c){
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cli_putc(' ');
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}
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cli_putstr(sv);
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}
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void print_overhead(void){
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char str[11];
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cli_putstr("\r\n\r\n=== benchmark ===");
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ultoa(const_overhead, str, 10);
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cli_putstr("\r\n\tconst overhead: ");
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cli_putstr(str);
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ultoa(int_overhead, str, 10);
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cli_putstr("\r\n\tinterrupt overhead: ");
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cli_putstr(str);
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}
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