modification to the build system

[avr-crypto-lib.git] / test_src / performance_test.c

diff --git a/test_src/performance_test.c b/test_src/performance_test.c
new file mode 100644 (file)
index 0000000..04a26bd
--- /dev/null
+++ b/test_src/performance_test.c
@@ -0,0 +1,112 @@
+/* performance_test.c */
+/*
+    This file is part of the Crypto-avr-lib/microcrypt-lib.
+    Copyright (C) 2008  Daniel Otte (daniel.otte@rub.de)
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
+ * author: Daniel Otte
+ * email:  daniel.otte@rub.de
+ * license: GPLv3
+ * 
+ * 
+ **/
+ 
+#include "config.h"
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/pgmspace.h>
+#include "uart.h"
+#include "performance_test.h"
+
+
+#ifdef ATMEGA644
+       #define TIMSK TIMSK1
+#endif
+
+
+
+uint32_t ovfcounter;
+
+uint16_t const_overhead=0;
+uint16_t int_overhead=0;
+
+ISR(TIMER1_OVF_vect){
+       ovfcounter++;
+}
+
+void calibrateTimer(void){
+       startTimer(1);
+       stopTimer();
+       const_overhead = TCNT1;
+       startTimer(1);
+       TCNT1=0xFFFE;
+       ; ; ; ;
+//     asm volatile("NOP\n"::); asm volatile("NOP\n"::);
+       stopTimer();
+       int_overhead = TCNT1;
+}
+
+void startTimer(uint8_t granularity){
+       TCCR1B = 0; /* stop timer */
+       TCNT1  = 0;
+       ovfcounter = 0;
+       TCCR1A = 0x00;
+       TIMSK &= 0xC3;
+       TIMSK |= _BV(TOIE1); /* enable TOIE1 */
+       TCCR1B = granularity & 0x7;     /* start timer */
+}
+
+uint64_t stopTimer(void){
+       TCCR1B = 0; /* stop timer */
+       uint64_t ret;
+       ret = (ovfcounter<<16) | TCNT1;
+       ret -= const_overhead;
+       ret -= ovfcounter * int_overhead;
+       return ret;
+}
+
+void getOverhead(uint16_t* constoh, uint16_t* intoh){
+       *constoh = const_overhead;
+       *intoh   = int_overhead; 
+}
+
+void print_time_P(PGM_P s, uint64_t t){
+       char sv[16];
+       uint8_t c;
+       uart_putstr_P(PSTR("\r\n"));
+       uart_putstr_P(s);
+       ultoa((unsigned long)t, sv, 10);
+       for(c=strlen(sv); c<11; ++c){
+               uart_putc(' ');
+       }
+       uart_putstr(sv);
+}
+
+void print_overhead(void){
+       char str[16];
+       uart_putstr_P(PSTR("\r\n\r\n=== benchmark ==="));
+       utoa(const_overhead, str, 10);
+       uart_putstr_P(PSTR("\r\n\tconst overhead:     "));
+       uart_putstr(str);
+       utoa(int_overhead, str, 10);
+       uart_putstr_P(PSTR("\r\n\tinterrupt overhead: "));
+       uart_putstr(str);
+}
+
+