Hi Im using a C6418 evm and I am having trouble getting the correct cycle counts. Im getting two different results using the Target/clock/view or using the TIMER_getCount(hTimer); The one that seems to be correct is the Target/clock/view, but i cant use that during full optimization. Im using DSP-bios version 5.41.02.14.
One other problem Im having is that the processor takes way to long time to calculate simple commands. For instance a for loop looking like
short x[32];
int i;
for(i=0;i<32;i++){
x[i]=x[i]<<2;
}
takes approximatly 1500 cycles using Target/clock/view . That can't be right.
The code for cyclecount im using is:
void cycle_count_init(void){ hTimer = TIMER_open(TIMER_DEVANY,0); TIMER_configArgs(hTimer, 0x000002C0, 0xFFFFFFFF, 0x00000000); /* Compute the overhead of calling the timer. */ cycle_start = TIMER_getCount(hTimer); /* to remove L1P miss overhead */ cycle_start = TIMER_getCount(hTimer); cycle_stop = TIMER_getCount(hTimer); cycle_overhead = cycle_stop - cycle_start; } void cycle_count_start(){
cycle_start = TIMER_getCount(hTimer);
} #define CYCLES_PER_TIMERTICK 8 Void cycle_count_stop(unsigned int *cycle_ave){ unsigned int temp; cycle_stop = TIMER_getCount(hTimer); cycle_diff = ((cycle_stop - cycle_start) - cycle_overhead); if(cycle_diff>0){ //avoid negative cycle counts temp=(cycle_diff*CYCLES_PER_TIMERTICK); (*cycle_ave)=temp*0.05+(*Cycle_count_ave)*0.95; }
}
Is there somthing that I'm doing wrong?
