1 /* performance_test.c */
3 This file is part of the AVR-Crypto-Lib.
4 Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * email: daniel.otte@rub.de
32 #include <avr/interrupt.h>
33 #include <avr/pgmspace.h>
35 #include "performance_test.h"
46 uint16_t const_overhead=0;
47 uint16_t int_overhead=0;
53 void calibrateTimer(void){
57 const_overhead = TCNT1;
65 void startTimer(uint8_t granularity){
66 TCCR1B = 0; /* stop timer */
71 TIMSK |= _BV(TOIE1); /* enable TOIE1 */
72 TCCR1B = granularity & 0x7; /* start timer */
75 uint64_t stopTimer(void){
76 TCCR1B = 0; /* stop timer */
78 ret = (ovfcounter<<16) | TCNT1;
79 ret -= const_overhead;
80 ret -= ovfcounter * int_overhead;
84 void getOverhead(uint16_t* constoh, uint16_t* intoh){
85 *constoh = const_overhead;
86 *intoh = int_overhead;
89 void print_time_P(PGM_P s, uint64_t t){
92 uart_putstr_P(PSTR("\r\n"));
94 ultoa((unsigned long)t, sv, 10);
95 for(c=strlen(sv); c<11; ++c){
101 void print_overhead(void){
103 uart_putstr_P(PSTR("\r\n\r\n=== benchmark ==="));
104 utoa(const_overhead, str, 10);
105 uart_putstr_P(PSTR("\r\n\tconst overhead: "));
107 utoa(int_overhead, str, 10);
108 uart_putstr_P(PSTR("\r\n\tinterrupt overhead: "));