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KawPow: optimized CPU share verification

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- 2 times faster CPU share verification (11 -> 5 ms)
- 1.5 times faster light cache initialization
This commit is contained in:
SChernykh 2020-06-26 12:31:26 +02:00
parent 03e9797b92
commit 5724d8beb6
4 changed files with 61 additions and 38 deletions
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6
src/crypto/kawpow/KPCache.cpp
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@ -92,9 +92,9 @@ bool KPCache::init(uint32_t epoch)
const uint32_t b = (cache_nodes * (i + 1)) / n;
threads.emplace_back([this, a, b, cache_nodes, &cache]() {
for (uint32_t j = a; j < b; ++j) {
ethash_calculate_dag_item_opt(((node*)m_DAGCache.data()) + j, j, num_dataset_parents, &cache);
}
uint32_t j = a;
for (; j + 4 <= b; j += 4) ethash_calculate_dag_item4_opt(((node*)m_DAGCache.data()) + j, j, num_dataset_parents, &cache);
for (; j < b; ++j) ethash_calculate_dag_item_opt(((node*)m_DAGCache.data()) + j, j, num_dataset_parents, &cache);
});
}

5
src/crypto/kawpow/KPHash.cpp
View file

@ -285,10 +285,7 @@ void KPHash::calculate(const KPCache& light_cache, uint32_t block_height, const
uint32_t item_index = (mix[r % LANES][0] % num_items) * 4;
node item[4];
ethash_calculate_dag_item_opt(item + 0, item_index + 0, KPCache::num_dataset_parents, &cache);
ethash_calculate_dag_item_opt(item + 1, item_index + 1, KPCache::num_dataset_parents, &cache);
ethash_calculate_dag_item_opt(item + 2, item_index + 2, KPCache::num_dataset_parents, &cache);
ethash_calculate_dag_item_opt(item + 3, item_index + 3, KPCache::num_dataset_parents, &cache);
ethash_calculate_dag_item4_opt(item, item_index, KPCache::num_dataset_parents, &cache);
uint32_t dst_counter = 0;
uint32_t src_counter = 0;