tiamak/p2pool-salvium
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De-duplicate tx hashes and pub keys to save memory (off by default) (#382)

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P2Pool-main: 8.2 MB saved
P2Pool-mini: 66 MB saved
P2Pool-nano: 25.2 MB saved

The feature is available only when building from source and is intended for use on low-memory systems (for example, a VPS server with < 1 GB RAM).

It only makes sense to use with `--no-cache --no-randomx` in the command line because cache and RandomX hasher take much more memory.
This commit is contained in:
SChernykh
2025-10-18 12:21:16 +02:00
committed by GitHub
parent 52bcbda381
commit e2f0ec7c69
25 changed files with 640 additions and 103 deletions
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src/crypto.cpp
+9 -8
View File
@@ -218,7 +218,7 @@ public:
{
WriteLock lock(derivations_lock);
auto entry = derivations->emplace(index, DerivationEntry{ derivation, { 0xFFFFFFFFUL, 0xFFFFFFFFUL }, {}, t }).first;
auto entry = derivations->emplace(index, DerivationEntry{ derivation, { 0xFFFFFFFFUL, 0xFFFFFFFFUL }, {}, static_cast<uint32_t>(t) }).first;
entry->second.add_view_tag(static_cast<uint32_t>(output_index << 8) | view_tag);
}
@@ -262,7 +262,7 @@ public:
const uint64_t t = seconds_since_epoch();
{
WriteLock lock(public_keys_lock);
public_keys->emplace(index, PublicKeyEntry{ derived_key, t });
public_keys->emplace(index, PublicKeyEntry{ static_cast<indexed_hash>(derived_key), static_cast<uint32_t>(t) });
}
return true;
@@ -297,7 +297,7 @@ public:
const uint64_t t = seconds_since_epoch();
{
WriteLock lock(tx_keys_lock);
tx_keys->emplace(index, TxKeyEntry{ pub, sec, t });
tx_keys->emplace(index, TxKeyEntry{ pub, sec, static_cast<uint32_t>(t) });
}
}
@@ -306,7 +306,8 @@ public:
if (timestamp) {
auto clean_old = [timestamp](auto* table) {
for (auto it = table->begin(); it != table->end();) {
if (it->second.m_timestamp < timestamp) {
// Wraparound-safe way of checking "it->second.m_timestamp < timestamp"
if (((it->second.m_timestamp - static_cast<uint32_t>(timestamp)) & 0x80000000UL) != 0) {
it = table->erase(it);
}
else {
@@ -357,7 +358,7 @@ private:
uint32_t m_viewTags1[2] = { 0xFFFFFFFFUL, 0xFFFFFFFFUL };
std::vector<uint32_t> m_viewTags2;
// cppcheck-suppress unusedStructMember
uint64_t m_timestamp;
uint32_t m_timestamp;
FORCEINLINE bool find_view_tag(size_t output_index, uint8_t& view_tag) const
{
@@ -407,9 +408,9 @@ private:
struct PublicKeyEntry
{
hash m_key;
indexed_hash m_key;
// cppcheck-suppress unusedStructMember
uint64_t m_timestamp;
uint32_t m_timestamp;
};
struct TxKeyEntry
@@ -417,7 +418,7 @@ private:
hash m_pub;
hash m_sec;
// cppcheck-suppress unusedStructMember
uint64_t m_timestamp;
uint32_t m_timestamp;
};
typedef unordered_map<std::array<uint8_t, HASH_SIZE * 2>, DerivationEntry> DerivationsMap;