http://hi.baidu.com/myyb/blog/item/e1071dce1878d032b700c8c7.html
TI C64x 可以有兩種方法來得到程序的運行 cycle, 一個是Enable clock後調用 用 clock()( 這個在 VC 下是得到以 ms 爲單位的時間，這裏得到的是 cycle), 另一個就是 CSL （ Chip Support Library ）提供的 timer 。
下面給出兩種方法的程序段
/**************************************************************/
/* */
/* Auth:wb0330 */
/* Dest: used to measure cycle counts for TI C64x DSP */
/* Support by: http://hi.baidu.com/videocodec */
/* or QQ group: 24960630, 10714050, 11216191 */
/* */
/**************************************************************/
#include < stdio .h>
#include < time .h> /* need time.h in order to call clock()*/
int main ()
{
unsigned int start , stop , overhead,cycles ;
/*––––––––––––––––––––––––––*/
/* The following example demonstrates how to include */
/* the clock() function in your C code. */
/*––––––––––––––––––––––– – –*/
start = clock (); /* Calculate overhead of calling clock*/
stop = clock (); /* and subtract this value from The results*/
overhead = stop - start ;
start = clock ();
/* ––––––––––––––––––––––––––*/
/* Call a function here. */
/* ––––––––––––––––––––––––––*/
stop = clock ();
cycles = stop - start - overhead;
printf ( “cycles: %d / n ” , cycles );
printf ( "times: %.2f s with cpu 600MHz, /n" ,(( float ) cycles /( float )600000000));
// clock() end
return 0;
}
這裏給出CSL_Timer 部分的
/**************************************************************/
/* */
/* Auth:wb0330 */
/* Dest: used to measure cycle counts for TI C64x DSP */
/* Support by: http://hi.baidu.com/videocodec */
/* or QQ group:24960630, 10714050, 11216191 */
/* */
/**************************************************************/
#include < stdio .h>
#include "csl.h"
#include "csl_timer.h"
int main ()
{
TIMER_Handle hTimer ;
unsigned int start , stop , overhead ， diff,cycles;
/*––––––––––––––––––––––––––––––––––*/
/* The following sample code shows how to set up the timer */
/* and measure cycle counts with Chip Support Library (CSL) */
/*––––––––––––––––––––––––––––––––––*/
hTimer = TIMER_open (TIMER_DEVANY,0); /* open a timer */
/*––––––––––––––––––––––––––––––––––*/
/* Configure the timer. count corresponds to 8 CPU cycles in C64 */
/*––––––––––––––––––––––––––––––––––*/
/* control period initial value */
TIMER_configArgs ( hTimer , 0x000002C0, 0xFFFFFFFF, 0x00000000);
/* ––––––––––––––––––––––––––––––––––*/
/* Compute the overhead of calling the timer. */
/* ––––––––––––––––––––––––––––––––––*/
start = TIMER_getCount ( hTimer ); /* to remove L1P miss overhead */
start = TIMER_getCount ( hTimer );
stop = TIMER_getCount ( hTimer );
overhead = stop - start ;
start = TIMER_getCount ( hTimer );
/* ––––––––––––––––––––––––––––––––––*/
/* Call a function here. */
/* ––––––––––––––––––––––––––––––––––*/
diff = ( TIMER_getCount ( hTimer ) - start ) - overhead ;
TIMER_close ( hTimer );
cycles = diff*8;
printf ( “cycles %d / n”, cycles);
printf ( "times: %.2f s with cpu 600MHz, /n" ,(( float ) cycles /( float )600000000));
// The maximum resolution of the timer is 8 CPU cycles, since the input clock to
// the timer is fixed to the CPU clock divided by eight
// CSL_timer end
return 0;
}