Aaron Enye Shi
98 строки
3.7 KiB
C++
98 строки
3.7 KiB
C++
/*
|
|
Copyright (c) 2015-2016 Advanced Micro Devices, Inc. All rights reserved.
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
The above copyright notice and this permission notice shall be included in
|
|
all copies or substantial portions of the Software.
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
THE SOFTWARE.
|
|
*/
|
|
|
|
/* HIT_START
|
|
* BUILD: %t %s ../test_common.cpp NVCC_OPTIONS --Wno-deprecated-declarations
|
|
* RUN: %t
|
|
* HIT_END
|
|
*/
|
|
|
|
#include <iostream>
|
|
|
|
#include <hip/hip_runtime.h>
|
|
#include <hip/device_functions.h>
|
|
|
|
#define HIP_ASSERT(x) (assert((x) == hipSuccess))
|
|
|
|
__global__ void gpu_ballot(hipLaunchParm lp, unsigned int* device_ballot, int Num_Warps_per_Block,
|
|
int pshift) {
|
|
int tid = threadIdx.x + blockIdx.x * blockDim.x;
|
|
const unsigned int warp_num = threadIdx.x >> pshift;
|
|
#ifdef __HIP_PLATFORM_HCC__
|
|
atomicAdd(&device_ballot[warp_num + blockIdx.x * Num_Warps_per_Block],
|
|
__popcll(__ballot(tid - 245)));
|
|
#else
|
|
atomicAdd(&device_ballot[warp_num + blockIdx.x * Num_Warps_per_Block],
|
|
__popc(__ballot(tid - 245)));
|
|
#endif
|
|
}
|
|
|
|
|
|
int main(int argc, char* argv[]) {
|
|
int warpSize, pshift;
|
|
hipDeviceProp_t devProp;
|
|
hipGetDeviceProperties(&devProp, 0);
|
|
|
|
warpSize = devProp.warpSize;
|
|
|
|
int w = warpSize;
|
|
pshift = 0;
|
|
while (w >>= 1) ++pshift;
|
|
|
|
unsigned int Num_Threads_per_Block = 512;
|
|
unsigned int Num_Blocks_per_Grid = 1;
|
|
unsigned int Num_Warps_per_Block = Num_Threads_per_Block / warpSize;
|
|
unsigned int Num_Warps_per_Grid = (Num_Threads_per_Block * Num_Blocks_per_Grid) / warpSize;
|
|
unsigned int* host_ballot = (unsigned int*)malloc(Num_Warps_per_Grid * sizeof(unsigned int));
|
|
unsigned int* device_ballot;
|
|
HIP_ASSERT(hipMalloc((void**)&device_ballot, Num_Warps_per_Grid * sizeof(unsigned int)));
|
|
int divergent_count = 0;
|
|
for (int i = 0; i < Num_Warps_per_Grid; i++) host_ballot[i] = 0;
|
|
|
|
|
|
HIP_ASSERT(hipMemcpy(device_ballot, host_ballot, Num_Warps_per_Grid * sizeof(unsigned int),
|
|
hipMemcpyHostToDevice));
|
|
|
|
hipLaunchKernel(gpu_ballot, dim3(Num_Blocks_per_Grid), dim3(Num_Threads_per_Block), 0, 0,
|
|
device_ballot, Num_Warps_per_Block, pshift);
|
|
|
|
|
|
HIP_ASSERT(hipMemcpy(host_ballot, device_ballot, Num_Warps_per_Grid * sizeof(unsigned int),
|
|
hipMemcpyDeviceToHost));
|
|
for (int i = 0; i < Num_Warps_per_Grid; i++) {
|
|
if ((host_ballot[i] == 0) || (host_ballot[i] / warpSize == warpSize))
|
|
std::cout << "Warp " << i << " IS convergent- Predicate true for "
|
|
<< host_ballot[i] / warpSize << " threads\n";
|
|
|
|
else {
|
|
std::cout << " Warp " << i << " IS divergent - Predicate true for "
|
|
<< host_ballot[i] / warpSize << " threads\n";
|
|
divergent_count++;
|
|
}
|
|
}
|
|
|
|
if (divergent_count == 1)
|
|
printf("PASSED\n");
|
|
else {
|
|
printf("FAILED\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|