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Deal with the cases where nprobe > num_clusters. #2

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Merged
merged 1 commit into from
Jun 4, 2025
Merged

Deal with the cases where nprobe > num_clusters. #2

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5 changes: 5 additions & 0 deletions rabitqlib/index/ivf/ivf.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -101,6 +101,8 @@ class IVF {
void search(const float*, size_t, size_t, PID*, bool) const;

[[nodiscard]] size_t padded_dim() const { return this->padded_dim_; }

[[nodiscard]] size_t num_clusters() const { return this->num_cluster_; }
};

inline IVF::IVF(size_t n, size_t dim, size_t cluster_num, size_t bits, RotatorType type)
Expand Down Expand Up @@ -374,6 +376,9 @@ inline void IVF::search(
PID* __restrict__ results,
bool use_hacc = true
) const {
if (nprobe > num_cluster_) {
nprobe = num_cluster_;
}
std::vector<float> rotated_query(padded_dim_);
this->rotator_->rotate(query, rotated_query.data());

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4 changes: 4 additions & 0 deletions sample/ivf_rabitq_querying.cpp
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Expand Up @@ -86,6 +86,10 @@ int main(int argc, char** argv) {
for (size_t r = 0; r < test_round; r++) {
for (size_t l = 0; l < length; ++l) {
size_t nprobe = nprobes[l];
if (nprobe > ivf.num_clusters()) {
std::cout << "nprobe " << nprobe << " is larger than number of clusters, ";
std::cout << "will use nprobe = num_cluster (" << ivf.num_clusters() << ").\n";
}
size_t total_correct = 0;
float total_time = 0;
std::vector<PID> results(topk);
Expand Down