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GroupByRuntime.cpp
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293 lines (273 loc) · 13.8 KB
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/*
* Copyright 2017 MapD Technologies, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "JoinHashImpl.h"
#include "MurmurHash.h"
extern "C" ALWAYS_INLINE DEVICE uint32_t key_hash(const int64_t* key,
const uint32_t key_count,
const uint32_t key_byte_width) {
return MurmurHash1(key, key_byte_width * key_count, 0);
}
extern "C" NEVER_INLINE DEVICE int64_t* get_group_value(int64_t* groups_buffer,
const uint32_t groups_buffer_entry_count,
const int64_t* key,
const uint32_t key_count,
const uint32_t key_width,
const uint32_t row_size_quad,
const int64_t* init_vals) {
uint32_t h = key_hash(key, key_count, key_width) % groups_buffer_entry_count;
int64_t* matching_group =
get_matching_group_value(groups_buffer, h, key, key_count, key_width, row_size_quad, init_vals);
if (matching_group) {
return matching_group;
}
uint32_t h_probe = (h + 1) % groups_buffer_entry_count;
while (h_probe != h) {
matching_group =
get_matching_group_value(groups_buffer, h_probe, key, key_count, key_width, row_size_quad, init_vals);
if (matching_group) {
return matching_group;
}
h_probe = (h_probe + 1) % groups_buffer_entry_count;
}
return NULL;
}
extern "C" NEVER_INLINE DEVICE bool dynamic_watchdog();
extern "C" NEVER_INLINE DEVICE int64_t* get_group_value_with_watchdog(int64_t* groups_buffer,
const uint32_t groups_buffer_entry_count,
const int64_t* key,
const uint32_t key_count,
const uint32_t key_width,
const uint32_t row_size_quad,
const int64_t* init_vals) {
uint32_t h = key_hash(key, key_count, key_width) % groups_buffer_entry_count;
int64_t* matching_group =
get_matching_group_value(groups_buffer, h, key, key_count, key_width, row_size_quad, init_vals);
if (matching_group) {
return matching_group;
}
uint32_t watchdog_countdown = 100;
uint32_t h_probe = (h + 1) % groups_buffer_entry_count;
while (h_probe != h) {
matching_group =
get_matching_group_value(groups_buffer, h_probe, key, key_count, key_width, row_size_quad, init_vals);
if (matching_group) {
return matching_group;
}
h_probe = (h_probe + 1) % groups_buffer_entry_count;
if (--watchdog_countdown == 0) {
if (dynamic_watchdog()) {
return NULL;
}
watchdog_countdown = 100;
}
}
return NULL;
}
extern "C" NEVER_INLINE DEVICE int64_t* get_group_value_columnar(int64_t* groups_buffer,
const uint32_t groups_buffer_entry_count,
const int64_t* key,
const uint32_t key_qw_count) {
uint32_t h = key_hash(key, key_qw_count, sizeof(int64_t)) % groups_buffer_entry_count;
int64_t* matching_group =
get_matching_group_value_columnar(groups_buffer, h, key, key_qw_count, groups_buffer_entry_count);
if (matching_group) {
return matching_group;
}
uint32_t h_probe = (h + 1) % groups_buffer_entry_count;
while (h_probe != h) {
matching_group =
get_matching_group_value_columnar(groups_buffer, h_probe, key, key_qw_count, groups_buffer_entry_count);
if (matching_group) {
return matching_group;
}
h_probe = (h_probe + 1) % groups_buffer_entry_count;
}
return NULL;
}
extern "C" NEVER_INLINE DEVICE int64_t* get_group_value_columnar_with_watchdog(int64_t* groups_buffer,
const uint32_t groups_buffer_entry_count,
const int64_t* key,
const uint32_t key_qw_count) {
uint32_t h = key_hash(key, key_qw_count, sizeof(int64_t)) % groups_buffer_entry_count;
int64_t* matching_group =
get_matching_group_value_columnar(groups_buffer, h, key, key_qw_count, groups_buffer_entry_count);
if (matching_group) {
return matching_group;
}
uint32_t watchdog_countdown = 100;
uint32_t h_probe = (h + 1) % groups_buffer_entry_count;
while (h_probe != h) {
matching_group =
get_matching_group_value_columnar(groups_buffer, h_probe, key, key_qw_count, groups_buffer_entry_count);
if (matching_group) {
return matching_group;
}
h_probe = (h_probe + 1) % groups_buffer_entry_count;
if (--watchdog_countdown == 0) {
if (dynamic_watchdog()) {
return NULL;
}
watchdog_countdown = 100;
}
}
return NULL;
}
extern "C" ALWAYS_INLINE DEVICE int64_t* get_group_value_fast(int64_t* groups_buffer,
const int64_t key,
const int64_t min_key,
const int64_t bucket,
const uint32_t row_size_quad) {
int64_t key_diff = key - min_key;
if (bucket) {
key_diff /= bucket;
}
int64_t off = key_diff * row_size_quad;
if (groups_buffer[off] == EMPTY_KEY_64) {
groups_buffer[off] = key;
}
return groups_buffer + off + 1;
}
extern "C" ALWAYS_INLINE DEVICE int64_t* get_group_value_fast_with_original_key(int64_t* groups_buffer,
const int64_t key,
const int64_t orig_key,
const int64_t min_key,
const int64_t bucket,
const uint32_t row_size_quad) {
int64_t key_diff = key - min_key;
if (bucket) {
key_diff /= bucket;
}
int64_t off = key_diff * row_size_quad;
if (groups_buffer[off] == EMPTY_KEY_64) {
groups_buffer[off] = orig_key;
}
return groups_buffer + off + 1;
}
extern "C" ALWAYS_INLINE DEVICE uint32_t get_columnar_group_bin_offset(int64_t* key_base_ptr,
const int64_t key,
const int64_t min_key,
const int64_t bucket) {
int64_t off = key - min_key;
if (bucket) {
off /= bucket;
}
if (key_base_ptr[off] == EMPTY_KEY_64) {
key_base_ptr[off] = key;
}
return off;
}
extern "C" ALWAYS_INLINE DEVICE int64_t* get_group_value_one_key(int64_t* groups_buffer,
const uint32_t groups_buffer_entry_count,
int64_t* small_groups_buffer,
const uint32_t small_groups_buffer_qw_count,
const int64_t key,
const int64_t min_key,
const uint32_t row_size_quad,
const int64_t* init_vals) {
int64_t off = key - min_key;
if (0 <= off && off < small_groups_buffer_qw_count) {
return get_group_value_fast(small_groups_buffer, key, min_key, 0, row_size_quad);
}
return get_group_value(groups_buffer, groups_buffer_entry_count, &key, 1, sizeof(int64_t), row_size_quad, init_vals);
}
extern "C" ALWAYS_INLINE DEVICE int64_t* get_group_value_one_key_with_watchdog(
int64_t* groups_buffer,
const uint32_t groups_buffer_entry_count,
int64_t* small_groups_buffer,
const uint32_t small_groups_buffer_qw_count,
const int64_t key,
const int64_t min_key,
const uint32_t row_size_quad,
const int64_t* init_vals) {
int64_t off = key - min_key;
if (0 <= off && off < small_groups_buffer_qw_count) {
return get_group_value_fast(small_groups_buffer, key, min_key, 0, row_size_quad);
}
return get_group_value_with_watchdog(
groups_buffer, groups_buffer_entry_count, &key, 1, sizeof(int64_t), row_size_quad, init_vals);
}
extern "C" ALWAYS_INLINE DEVICE int64_t* get_scan_output_slot(int64_t* output_buffer,
const uint32_t output_buffer_entry_count,
const uint32_t pos,
const uint32_t row_size_quad) {
uint64_t off = static_cast<uint64_t>(pos) * static_cast<uint64_t>(row_size_quad);
if (pos < output_buffer_entry_count) {
output_buffer[off] = pos;
return output_buffer + off + 1;
}
return NULL;
}
extern "C" ALWAYS_INLINE DEVICE int64_t hash_join_idx(int64_t hash_buff,
const int64_t key,
const int64_t min_key,
const int64_t max_key) {
if (key >= min_key && key <= max_key) {
return *SUFFIX(get_hash_slot)(reinterpret_cast<int32_t*>(hash_buff), key, min_key);
}
return -1;
}
extern "C" ALWAYS_INLINE DEVICE int64_t hash_join_idx_nullable(int64_t hash_buff,
const int64_t key,
const int64_t min_key,
const int64_t max_key,
const int64_t null_val) {
if (key != null_val) {
return hash_join_idx(hash_buff, key, min_key, max_key);
}
const int64_t translated_key = max_key + 1;
return hash_join_idx(hash_buff, translated_key, min_key, translated_key);
}
extern "C" ALWAYS_INLINE DEVICE int64_t hash_join_idx_sharded(int64_t hash_buff,
const int64_t key,
const int64_t min_key,
const int64_t max_key,
const uint32_t entry_count_per_shard,
const uint32_t num_shards,
const uint32_t device_count) {
if (key >= min_key && key <= max_key) {
return *SUFFIX(get_hash_slot_sharded)(
reinterpret_cast<int32_t*>(hash_buff), key, min_key, entry_count_per_shard, num_shards, device_count);
}
return -1;
}
extern "C" ALWAYS_INLINE DEVICE int64_t hash_join_idx_sharded_nullable(int64_t hash_buff,
const int64_t key,
const int64_t min_key,
const int64_t max_key,
const uint32_t entry_count_per_shard,
const uint32_t num_shards,
const uint32_t device_count,
const int64_t null_val) {
if (key != null_val) {
return hash_join_idx_sharded(hash_buff, key, min_key, max_key, entry_count_per_shard, num_shards, device_count);
}
const int64_t translated_key = max_key + 1;
return hash_join_idx_sharded(
hash_buff, translated_key, min_key, translated_key, entry_count_per_shard, num_shards, device_count);
}
#define DEF_TRANSLATE_NULL_KEY(key_type) \
extern "C" NEVER_INLINE DEVICE int64_t translate_null_key_##key_type( \
const key_type key, const key_type null_val, const key_type translated_val) { \
if (key == null_val) { \
return translated_val; \
} \
return key; \
}
DEF_TRANSLATE_NULL_KEY(int8_t)
DEF_TRANSLATE_NULL_KEY(int16_t)
DEF_TRANSLATE_NULL_KEY(int32_t)
DEF_TRANSLATE_NULL_KEY(int64_t)
#undef DEF_TRANSLATE_NULL_KEY