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Diffstat (limited to 'SCAN-RSS/baselines/cpu/app_baseline.cpp')
| -rw-r--r-- | SCAN-RSS/baselines/cpu/app_baseline.cpp | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/SCAN-RSS/baselines/cpu/app_baseline.cpp b/SCAN-RSS/baselines/cpu/app_baseline.cpp new file mode 100644 index 0000000..3840eb4 --- /dev/null +++ b/SCAN-RSS/baselines/cpu/app_baseline.cpp @@ -0,0 +1,199 @@ +/* +* JGL@SAFARI +*/ + +/** +* CPU code with Thrust +*/ +#include <stdio.h> +#include <stdlib.h> +#include <stdbool.h> +#include <string.h> +#include <unistd.h> +#include <getopt.h> +#include <assert.h> + +#include <iostream> +#include <fstream> +#include <cstdlib> +#include <ctime> +#include <cstdio> +#include <math.h> +#include <sys/time.h> + +#include <vector> + +#include <thrust/device_vector.h> +#include <thrust/host_vector.h> +#include <thrust/scan.h> +#include <thrust/copy.h> +#include <thrust/system/omp/execution_policy.h> +#include <thrust/system/omp/vector.h> + +#include <omp.h> + +#include "../../support/common.h" +#include "../../support/timer.h" + +#define ANSI_COLOR_RED "\x1b[31m" +#define ANSI_COLOR_GREEN "\x1b[32m" +#define ANSI_COLOR_RESET "\x1b[0m" + +// Pointer declaration +static T* A; +static T* C; +static T* C2; + +/** +* @brief creates input arrays +* @param nr_elements how many elements in input arrays +*/ +static void read_input(T* A, 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()) % 2; + A[i] = i; + } +} + +/** +* @brief compute output in the host +*/ +static void scan_host(T* C, T* A, unsigned int nr_elements) { + C[0] = A[0]; + for (unsigned int i = 1; i < nr_elements; i++) { + C[i] = C[i - 1] + A[i - 1]; + } +} + +// Params --------------------------------------------------------------------- +typedef struct Params { + unsigned int input_size; + int n_warmup; + int n_reps; + int exp; + int n_threads; +}Params; + +void usage() { + fprintf(stderr, + "\nUsage: ./program [options]" + "\n" + "\nGeneral options:" + "\n -h help" + "\n -w <W> # of untimed warmup iterations (default=1)" + "\n -e <E> # of timed repetition iterations (default=3)" + "\n -x <X> Weak (0) or strong (1) scaling (default=0)" + "\n -t <T> # of threads (default=8)" + "\n" + "\nBenchmark-specific options:" + "\n -i <I> input size (default=8M elements)" + "\n"); +} + +struct Params input_params(int argc, char **argv) { + struct Params p; + p.input_size = 2 << 20; + p.n_warmup = 1; + p.n_reps = 3; + p.exp = 0; + p.n_threads = 8; + + int opt; + while((opt = getopt(argc, argv, "hi:w:e:x:t:")) >= 0) { + switch(opt) { + case 'h': + usage(); + exit(0); + break; + case 'i': p.input_size = atoi(optarg); break; + case 'w': p.n_warmup = atoi(optarg); break; + case 'e': p.n_reps = atoi(optarg); break; + case 'x': p.exp = atoi(optarg); break; + case 't': p.n_threads = atoi(optarg); break; + default: + fprintf(stderr, "\nUnrecognized option!\n"); + usage(); + exit(0); + } + } + assert(p.n_threads > 0 && "Invalid # of threads!"); + + return p; +} + +/** +* @brief Main of the Host Application. +*/ +int main(int argc, char **argv) { + + struct Params p = input_params(argc, argv); + + unsigned int nr_of_dpus = 1; + + unsigned int i = 0; + const unsigned int input_size = p.input_size; + assert(input_size % (p.n_threads) == 0 && "Input size!"); + + // Input/output allocation + A = (T*)malloc(input_size * sizeof(T)); + C = (T*)malloc(input_size * sizeof(T)); + T *bufferA = A; + + // Create an input file with arbitrary data. + read_input(A, input_size); + + // Timer declaration + Timer timer; + float time_gpu = 0; + + thrust::omp::vector<T> h_output(input_size); + + // 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); + scan_host(C, A, input_size); + if(rep >= p.n_warmup) + stop(&timer, 0); + + memcpy(thrust::raw_pointer_cast(&h_output[0]), A, input_size * sizeof(T)); + + omp_set_num_threads(p.n_threads); + + if(rep >= p.n_warmup) + start(&timer, 1, rep - p.n_warmup); + thrust::exclusive_scan(thrust::omp::par, h_output.begin(),h_output.end(),h_output.begin()); + if(rep >= p.n_warmup) + stop(&timer, 1); + } + + // Print timing results + printf("CPU "); + print(&timer, 0, p.n_reps); + printf("Kernel "); + print(&timer, 1, p.n_reps); + + // Check output + bool status = true; + for (i = 0; i < input_size; i++) { + if(C[i] != h_output[i]){ + status = false; + //printf("%d: %lu -- %lu\n", i, C[i], h_output[i]); + } + } + 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(C); + + return 0; +} |