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faiss gpu: fix DeviceVector reallocations #3256

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faiss gpu: fix DeviceVector reallocations #3256

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4 changes: 2 additions & 2 deletions faiss/gpu/utils/DeviceVector.cuh
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Original file line number Diff line number Diff line change
Expand Up @@ -132,7 +132,7 @@ class DeviceVector {
bool resize(size_t newSize, cudaStream_t stream) {
bool mem = false;

if (num_ < newSize) {
if (newSize > capacity_) {
mem = reserve(getNewCapacity_(newSize), stream);
}

Expand Down Expand Up @@ -249,7 +249,7 @@ class DeviceVector {
if (preferredSize <= kDeviceVector_2x_Limit) {
return utils::nextHighestPowerOf2(preferredSize);
} else if (preferredSize <= kDeviceVector_1_25x_Limit) {
return preferredSize + (preferredSize << 2);
return preferredSize + (preferredSize >> 2);
} else {
return preferredSize;
}
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