int main(int argc, char **argv)
{
uint32_t pmuserenr;
MRC_PMU(pmuserenr, PMUSERENR);
if (!pmuserenr) {
fprintf(stderr, "User access to performance counters disabled, exiting\n");
return 1;
}
int cpu = getcpu();
printf("Executing CPU: %d\n", cpu);
// Set CPU affinity to make sure that the following code is executed on the
// CPU printed above.
setaff(cpu);
enable_pmn();
uint32_t pmcr, pmceid0, pmceid1;
MRC_PMU(pmcr, PMCR);
MRC_PMU(pmceid0, PMCEID0);
MRC_PMU(pmceid1, PMCEID1);
printf("PMCR: %"PRIx32"\n", pmcr);
printf("PMCEID0: %"PRIx32"\n", pmceid0);
printf("PMCEID1: %"PRIx32"\n", pmceid1);
set_pmn(0, CPU_CYCLES);
set_pmn(1, L1D_CACHE_LD);
set_pmn(2, L1D_CACHE_ST);
reset_pmn();
reset_ccnt();
// do some fake work
for (int i = 0; i < 50; i++) printf(".");
uint32_t cycles, cpu_cycles, l1d_cache_ld, l1d_cache_st;
MRC_PMU(cycles, PMCCNTR);
cpu_cycles = read_pmn(0);
l1d_cache_ld = read_pmn(1);
l1d_cache_st = read_pmn(2);
printf("\nCPU cycles: %"PRIu32"\n", cpu_cycles);
printf("Cycle Count: %"PRIu32"\n", cycles);
printf("Level 1 data cache access, read: %"PRIu32"\n", l1d_cache_ld);
printf("Level 1 data cache access, write: %"PRIu32"\n", l1d_cache_st);
return 0;
}
void pmu_stop(void){
unsigned int cycle_count, overflow, counter0, counter1, counter2, counter3, counter4, counter5;
disable_ccnt(); // Stop CCNT
disable_pmn(0); // Stop counter 0
disable_pmn(1); // Stop counter 1
disable_pmn(2); // Stop counter 2
disable_pmn(3); // Stop counter 3
disable_pmn(4); // Stop counter 4
disable_pmn(5); // Stop counter 5
counter0 = read_pmn(0); // Read counter 0
counter1 = read_pmn(1); // Read counter 1
counter2 = read_pmn(2); // Read counter 2
counter3 = read_pmn(3); // Read counter 3
counter4 = read_pmn(4); // Read counter 4
counter5 = read_pmn(5); // Read counter 5
cycle_count = read_ccnt(); // Read CCNT
overflow=read_flags(); //Check for overflow flag
printf("%d\t%d %d %d %d %d %d\n", cycle_count/667, counter0/667, counter1/667, counter2/667 ,counter3/667,counter4/667,counter5/667);
if(overflow)
printf("Warning Overflow Occured\n");
// printf("Overflow: %d, Cycle Count: %d \n\n", overflow,cycle_count);
};
