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Fix GPU hangs in SiftGPU #56

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Fix GPU hangs in SiftGPU #56

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4 changes: 2 additions & 2 deletions FriedLiver/Source/SiftGPU/ProgramCU.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -989,7 +989,7 @@ void __global__ ComputeOrientation_Kernel(float4* d_list,
const unsigned int p = (tidx + 1) % 36;
target[tidx] = (source[m] + source[c] + source[p])*one_third;

__syncthreads();
__threadfence();
volatile float *tmp = source;
source = target;
target = tmp;
Expand Down Expand Up @@ -1100,8 +1100,8 @@ void __global__ ComputeOrientation_Kernel(float4* d_list,
__syncthreads();
if (tidx == 0) {
weights[maxIndex] = -1.0f;
__syncthreads();
}
__syncthreads();

// 2nd reduction to compute 2nd max weight
for (unsigned int stride = COMPUTE_ORIENTATION_BLOCK / 2; stride > 0; stride /= 2) {
Expand Down