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Merge pull request #2 from sstsimulator/allevin/update_copyrights
Update copyrights for balar
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,94 +1,109 @@ | ||
| // Copyright 2009-2020 NTESS. Under the terms | ||
| // of Contract DE-NA0003525 with NTESS, the U.S. | ||
| // Government retains certain rights in this software. | ||
| // | ||
| // Copyright (c) 2009-2020, NTESS | ||
| // All rights reserved. | ||
| // | ||
| // Portions are copyright of other developers: | ||
| // See the file CONTRIBUTORS.TXT in the top level directory | ||
| // the distribution for more information. | ||
| // | ||
| // This file is part of the SST software package. For license | ||
| // information, see the LICENSE file in the top level directory of the | ||
| // distribution. | ||
|
|
||
| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <math.h> | ||
| #include <iostream> | ||
| #include <iostream> | ||
| // CUDA kernel. Each thread takes care of one element of c | ||
| __global__ void vecAdd(int *a, int *b, int *c, int n) | ||
| { | ||
| // Get our global thread ID | ||
| int id = blockIdx.x*blockDim.x+threadIdx.x; | ||
|
|
||
| // Make sure we do not go out of bounds | ||
| if (id < n) | ||
| c[id] = a[id] + b[id]; | ||
| } | ||
|
|
||
| int main( int argc, char* argv[] ) | ||
| { | ||
| // Size of vectors | ||
| int n = 131072; | ||
|
|
||
| // Host input vectors | ||
| int *h_a; | ||
| int *h_b; | ||
| printf("init point h_a %p\n",h_a); | ||
| //Host output vector | ||
| int *h_c; | ||
|
|
||
| // Device input vectors | ||
| int *d_a; | ||
| printf("init point d_a %p\n",d_a); | ||
| int *d_b; | ||
| //Device output vector | ||
| int *d_c; | ||
|
|
||
| // Size, in bytes, of each vector | ||
| size_t bytes = n*sizeof(int); | ||
|
|
||
| // Allocate memory for each vector on host | ||
| h_a = (int*)malloc(bytes); | ||
| printf("malloc point h_a %p\n",h_a); | ||
| h_b = (int*)malloc(bytes); | ||
| h_c = (int*)malloc(bytes); | ||
|
|
||
| // Allocate memory for each vector on GPU | ||
| cudaMalloc(&d_a, bytes); | ||
| printf("cuda malloc point d_a %p\n",d_a); | ||
| cudaMalloc(&d_b, bytes); | ||
| cudaMalloc(&d_c, bytes); | ||
|
|
||
| int i; | ||
| // Initialize vectors on host | ||
| for( i = 0; i < n; i++ ) { | ||
| h_a[i] =3; | ||
| h_b[i] = 4; | ||
| } | ||
|
|
||
| // Copy host vectors to device | ||
| printf("pre cpy point h_a %p\n",h_a); | ||
| printf("pre cpy point d_a %p\n",d_a); | ||
| cudaMemcpy( d_a, h_a, bytes, cudaMemcpyHostToDevice); | ||
| cudaMemcpy( d_b, h_b, bytes, cudaMemcpyHostToDevice); | ||
|
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||
| int blockSize, gridSize; | ||
|
|
||
| // Number of threads in each thread block | ||
| blockSize = 256; | ||
|
|
||
| // Number of thread blocks in grid | ||
| gridSize = (int)ceil((float)n/blockSize); | ||
|
|
||
| // Execute the kernel | ||
| vecAdd<<<gridSize, blockSize>>>(d_a, d_b, d_c, n); | ||
|
|
||
| // Copy array back to host | ||
| cudaMemcpy( h_c, d_c, bytes, cudaMemcpyDeviceToHost ); | ||
|
|
||
| // Sum up vector c and print result divided by n, this should equal 1 within error | ||
| int sum = 0; | ||
| for(i=0; i<n; i++) | ||
| sum += h_c[i]; | ||
| printf("final result: %d\n", sum/n); | ||
|
|
||
| // Release device memory | ||
| cudaFree(d_a); | ||
| cudaFree(d_b); | ||
| cudaFree(d_c); | ||
|
|
||
| // Release host memory | ||
| free(h_a); | ||
| free(h_b); | ||
| free(h_c); | ||
|
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||
| return 0; | ||
| } |