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hash_compacting.cu File Reference

Implements hash tables that assign each unique key an ID. More...

#include "debugging.h"
#include "hash_compacting.h"
#include "hash_functions.h"
#include "hash_table.cuh"
#include <cudpp.h>
#include "cuda_util.h"
#include <set>

Namespaces

 CudaHT
 Encapsulates the hash table library.
 

Functions

template<unsigned kNumHashFunctions>
__device__ unsigned CudaHT::CuckooHashing::retrieve_compacting (const unsigned query_key, const unsigned table_size, const Entry *table, const Functions< kNumHashFunctions > constants, const uint2 stash_constants, const unsigned stash_count, unsigned *num_probes_required=NULL)
 Answers a single query from a compacting hash table. More...
 
template<unsigned kNumHashFunctions>
__global__ void CudaHT::CuckooHashing::hash_retrieve_compacting (const unsigned n_queries, const unsigned *keys_in, const unsigned table_size, const Entry *table, const Functions< kNumHashFunctions > constants, const uint2 stash_constants, const unsigned stash_count, unsigned *values_out, unsigned *num_probes_required=NULL)
 Returns the unique identifier for every query key. Each thread manages a single query. More...
 
void CudaHT::CuckooHashing::CUDAWrapper::CallHashBuildCompacting (const int n, const unsigned num_hash_functions, const unsigned *keys, const unsigned table_size, const Functions< 2 > constants_2, const Functions< 3 > constants_3, const Functions< 4 > constants_4, const Functions< 5 > constants_5, const uint2 stash_constants, const unsigned max_iteration_attempts, unsigned *table, unsigned *stash_count, unsigned *failures)
 Calls the compacting cuckoo hash construction kernel.
 
void CudaHT::CuckooHashing::CUDAWrapper::CallHashRemoveDuplicates (const unsigned num_hash_functions, const unsigned table_size, const unsigned total_table_size, const Functions< 2 > constants_2, const Functions< 3 > constants_3, const Functions< 4 > constants_4, const Functions< 5 > constants_5, const uint2 stash_constants, unsigned *keys, unsigned *is_unique)
 Removes any duplicate keys from the table.
 
void CudaHT::CuckooHashing::CUDAWrapper::CallHashCompactDown (const unsigned table_size, Entry *table_entry, unsigned *unique_keys, const unsigned *table, const unsigned *indices)
 Creates a compacted list of the unique keys and sets up the keys with their unique IDs.
 
void CudaHT::CuckooHashing::CUDAWrapper::CallHashRetrieveCompacting (const unsigned n_queries, const unsigned num_hash_functions, const unsigned *keys_in, const unsigned table_size, const Entry *table, const Functions< 2 > constants_2, const Functions< 3 > constants_3, const Functions< 4 > constants_4, const Functions< 5 > constants_5, const uint2 stash_constants, const unsigned stash_count, unsigned *values_out)
 Calls the retrieval kernel.
 
void CudaHT::CuckooHashing::CUDAWrapper::ClearTable (const unsigned slots_in_table, const unsigned fill_value, unsigned *d_contents)
 Fills an array with a particular value.
 
Internal
template<unsigned kNumHashFunctions>
__global__ void CudaHT::CuckooHashing::hash_build_compacting (const int n, const unsigned *keys, const unsigned table_size, const Functions< kNumHashFunctions > constants, const uint2 stash_constants, const unsigned max_iteration_attempts, unsigned *table, unsigned *stash_count, unsigned *failures)
 Builds a compacting hash table.
 
template<unsigned kNumHashFunctions>
__global__ void CudaHT::CuckooHashing::hash_remove_duplicates (const unsigned table_size, const unsigned total_table_size, const Functions< kNumHashFunctions > constants, const uint2 stash_constants, unsigned *keys, unsigned *is_unique)
 Removes all key duplicates from a compacting hash table. More...
 
__global__ void CudaHT::CuckooHashing::hash_compact_down (const unsigned table_size, Entry *table_entry, unsigned *unique_keys, const unsigned *table, const unsigned *indices)
 Interleave the keys and their unique IDs in the cuckoo hash table, then compact down the keys.
 
Explicit template specializations
template<>
__global__ void CudaHT::CuckooHashing::hash_remove_duplicates< 2 > (const unsigned table_size, const unsigned total_table_size, const Functions< 2 > constants, const uint2 stash_constants, unsigned *keys, unsigned *is_unique)
 
template<>
__global__ void CudaHT::CuckooHashing::hash_remove_duplicates< 3 > (const unsigned table_size, const unsigned total_table_size, const Functions< 3 > constants, const uint2 stash_constants, unsigned *keys, unsigned *is_unique)
 
template<>
__global__ void CudaHT::CuckooHashing::hash_remove_duplicates< 4 > (const unsigned table_size, const unsigned total_table_size, const Functions< 4 > constants, const uint2 stash_constants, unsigned *keys, unsigned *is_unique)
 
template<>
__global__ void CudaHT::CuckooHashing::hash_remove_duplicates< 5 > (const unsigned table_size, const unsigned total_table_size, const Functions< 5 > constants, const uint2 stash_constants, unsigned *keys, unsigned *is_unique)
 

Detailed Description

Implements hash tables that assign each unique key an ID.