73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
|
#include "utility.h"
|
||
|
|
|
||
|
|
// TODO: Uncomment the following lines and fill in the correct size
|
||
|
|
//#define L1_SIZE [TODO]
|
||
|
|
//#define L2_SIZE [TODO]
|
||
|
|
//#define L3_SIZE [TODO]
|
||
|
|
|
||
|
|
int main (int ac, char **av) {
|
||
|
|
|
||
|
|
// create 4 arrays to store the latency numbers
|
||
|
|
// the arrays are initialized to 0
|
||
|
|
uint64_t dram_latency[SAMPLES] = {0};
|
||
|
|
uint64_t l1_latency[SAMPLES] = {0};
|
||
|
|
uint64_t l2_latency[SAMPLES] = {0};
|
||
|
|
uint64_t l3_latency[SAMPLES] = {0};
|
||
|
|
|
||
|
|
// A temporary variable we can use to load addresses
|
||
|
|
// The volatile keyword tells the compiler to not put this variable into a
|
||
|
|
// register- it should always try to load from memory/ cache.
|
||
|
|
volatile char tmp;
|
||
|
|
|
||
|
|
// Allocate a buffer of 64 Bytes
|
||
|
|
// the size of an unsigned integer (uint64_t) is 8 Bytes
|
||
|
|
// Therefore, we request 8 * 8 Bytes
|
||
|
|
uint64_t *target_buffer = (uint64_t *)malloc(8*sizeof(uint64_t));
|
||
|
|
|
||
|
|
if (NULL == target_buffer) {
|
||
|
|
perror("Unable to malloc");
|
||
|
|
return EXIT_FAILURE;
|
||
|
|
}
|
||
|
|
|
||
|
|
// [1.2] TODO: Uncomment the following line to allocate a buffer of a size
|
||
|
|
// of your chosing. This will help you measure the latencies at L2 and L3.
|
||
|
|
//uint64_t *eviction_buffer = (uint64_t)malloc(TODO);
|
||
|
|
|
||
|
|
// Example: Measure L1 access latency, store results in l1_latency array
|
||
|
|
for (int i=0; i<SAMPLES; i++){
|
||
|
|
// Step 1: bring the target cache line into L1 by simply accessing the line
|
||
|
|
tmp = target_buffer[0];
|
||
|
|
|
||
|
|
// Step 2: measure the access latency
|
||
|
|
l1_latency[i] = measure_one_block_access_time((uint64_t)target_buffer);
|
||
|
|
}
|
||
|
|
|
||
|
|
// ======
|
||
|
|
// [1.2] TODO: Measure DRAM Latency, store results in dram_latency array
|
||
|
|
// ======
|
||
|
|
//
|
||
|
|
|
||
|
|
// ======
|
||
|
|
// [1.2] TODO: Measure L2 Latency, store results in l2_latency array
|
||
|
|
// ======
|
||
|
|
//
|
||
|
|
|
||
|
|
// ======
|
||
|
|
// [1.2] TODO: Measure L3 Latency, store results in l3_latency array
|
||
|
|
// ======
|
||
|
|
//
|
||
|
|
|
||
|
|
|
||
|
|
// Print the results to the screen
|
||
|
|
// [1.5] Change print_results to print_results_for_python so that your code will work
|
||
|
|
// with the python plotter software
|
||
|
|
print_results(dram_latency, l1_latency, l2_latency, l3_latency);
|
||
|
|
|
||
|
|
free(target_buffer);
|
||
|
|
|
||
|
|
// [1.2] TODO: Uncomment this line once you uncomment the eviction_buffer creation line
|
||
|
|
//free(eviction_buffer);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|