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/**
* app.c
* Strided Access Host Application Source File
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <dpu.h>
#include <dpu_log.h>
#include <unistd.h>
#include <getopt.h>
#include <assert.h>
#include "../support/common.h"
#include "../support/timer.h"
#include "../support/params.h"
// Define the DPU Binary path as DPU_BINARY here
#ifndef DPU_BINARY
#define DPU_BINARY "./bin/dpu_code"
#endif
// Create input arrays
static void read_input(T* A, T* B, T* C, unsigned int nr_elements) {
srand(0);
printf("nr_elements\t%u\t", nr_elements);
for (unsigned int i = 0; i < nr_elements; i++) {
A[i] = (T) (rand());
B[i] = A[i];
C[i] = A[i];
}
}
// Compute output in the host
static void stride_host(T* B, T* A, unsigned int nr_elements, int s) {
for (unsigned int i = 0; i < nr_elements; i+=s){
B[i] = A[i];
}
}
// Pointer declaration
static T* A;
static T* B;
static T* C;
// Main of the Host Application
int main(int argc, char **argv) {
struct Params p = input_params(argc, argv);
struct dpu_set_t dpu_set, dpu;
uint32_t nr_of_dpus;
// Allocate DPUs and load binary
DPU_ASSERT(dpu_alloc(NR_DPUS, NULL, &dpu_set));
DPU_ASSERT(dpu_load(dpu_set, DPU_BINARY, NULL));
DPU_ASSERT(dpu_get_nr_dpus(dpu_set, &nr_of_dpus));
printf("Allocated %d DPU(s)\n", nr_of_dpus);
unsigned int i = 0;
double cc = 0;
double cc_min = 0;
const unsigned int input_size = p.exp == 0 ? p.input_size * nr_of_dpus : p.input_size;
// Input/output allocation
A = malloc(input_size * sizeof(T));
B = malloc(input_size * sizeof(T));
C = malloc(input_size * sizeof(T));
T *bufferA = A;
T *bufferB = B;
// Create an input file with arbitrary data
read_input(A, B, C, input_size);
// Timer declaration
Timer timer;
printf("NR_TASKLETS\t%d\tBL\t%d\n", NR_TASKLETS, BL);
// Loop over main kernel
for(int rep = 0; rep < p.n_warmup + p.n_reps; rep++) {
// Compute output on CPU (performance comparison and verification purposes)
if(rep >= p.n_warmup)
start(&timer, 0, rep - p.n_warmup);
stride_host(C, A, input_size, p.stride);
if(rep >= p.n_warmup)
stop(&timer, 0);
printf("Load input data\n");
if(rep >= p.n_warmup)
start(&timer, 1, rep - p.n_warmup);
// Input arguments
const unsigned int input_size_dpu = input_size / nr_of_dpus;
unsigned int kernel = 0;
dpu_arguments_t input_arguments = {input_size_dpu * sizeof(T), p.stride, kernel};
DPU_ASSERT(dpu_copy_to(dpu_set, "DPU_INPUT_ARGUMENTS", 0, (const void *)&input_arguments, sizeof(input_arguments)));
// Copy input arrays
i = 0;
DPU_FOREACH (dpu_set, dpu) {
DPU_ASSERT(dpu_copy_to(dpu, DPU_MRAM_HEAP_POINTER_NAME, 0, bufferA + input_size_dpu * i, input_size_dpu * sizeof(T)));
#ifdef COARSECOARSE
DPU_ASSERT(dpu_copy_to(dpu, DPU_MRAM_HEAP_POINTER_NAME, input_size_dpu * sizeof(T), bufferB + input_size_dpu * i, input_size_dpu * sizeof(T)));
#endif
i++;
}
if(rep >= p.n_warmup)
stop(&timer, 1);
printf("Run program on DPU(s) \n");
// Run DPU kernel
if(rep >= p.n_warmup)
start(&timer, 2, rep - p.n_warmup);
DPU_ASSERT(dpu_launch(dpu_set, DPU_SYNCHRONOUS));
if(rep >= p.n_warmup)
stop(&timer, 2);
#if PRINT
{
unsigned int each_dpu = 0;
printf("Display DPU Logs\n");
DPU_FOREACH (dpu_set, dpu) {
printf("DPU#%d:\n", each_dpu);
DPU_ASSERT(dpulog_read_for_dpu(dpu.dpu, stdout));
each_dpu++;
}
}
#endif
printf("Retrieve results\n");
if(rep >= p.n_warmup)
start(&timer, 3, rep - p.n_warmup);
dpu_results_t results[nr_of_dpus];
i = 0;
DPU_FOREACH (dpu_set, dpu) {
// Copy output array
DPU_ASSERT(dpu_copy_from(dpu, DPU_MRAM_HEAP_POINTER_NAME, input_size_dpu * sizeof(T), bufferB + input_size_dpu * i, input_size_dpu * sizeof(T)));
#if PERF
results[i].cycles = 0;
// Retrieve tasklet timings
for (unsigned int each_tasklet = 0; each_tasklet < NR_TASKLETS; each_tasklet++) {
dpu_results_t result;
result.cycles = 0;
DPU_ASSERT(dpu_copy_from(dpu, "DPU_RESULTS", each_tasklet * sizeof(dpu_results_t), &result, sizeof(dpu_results_t)));
if (result.cycles > results[i].cycles)
results[i].cycles = result.cycles;
}
#endif
i++;
}
if(rep >= p.n_warmup)
stop(&timer, 3);
#if PERF
uint64_t max_cycles = 0;
uint64_t min_cycles = 0xFFFFFFFFFFFFFFFF;
// Print performance results
if(rep >= p.n_warmup){
i = 0;
DPU_FOREACH(dpu_set, dpu) {
if(results[i].cycles > max_cycles)
max_cycles = results[i].cycles;
if(results[i].cycles < min_cycles)
min_cycles = results[i].cycles;
i++;
}
cc += (double)max_cycles;
cc_min += (double)min_cycles;
}
#endif
}
printf("DPU cycles = %g cc\n", cc / p.n_reps);
// Print timing results
printf("CPU ");
print(&timer, 0, p.n_reps);
printf("CPU-DPU ");
print(&timer, 1, p.n_reps);
printf("DPU Kernel ");
print(&timer, 2, p.n_reps);
printf("DPU-CPU ");
print(&timer, 3, p.n_reps);
// Check output
bool status = true;
for (i = 0; i < input_size; i++) {
if(C[i] != bufferB[i]){
status = false;
#if PRINT
printf("%d: %u -- %u\n", i, C[i], bufferB[i]);
#endif
}
}
if (status) {
printf("[" ANSI_COLOR_GREEN "OK" ANSI_COLOR_RESET "] Outputs are equal\n");
} else {
printf("[" ANSI_COLOR_RED "ERROR" ANSI_COLOR_RESET "] Outputs differ!\n");
}
// Deallocation
free(A);
free(B);
free(C);
DPU_ASSERT(dpu_free(dpu_set));
return status ? 0 : -1;
}
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