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Experimental BDB workaround optimizations

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NoodleDoodleNoodleDoodleNoodleDoodleNoo 9 years ago committed by warptangent
parent b4849310dc
commit da1d3c01de
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GPG Key ID: 0E490BEBFBE4E92D
5 changed files with 240 additions and 19 deletions
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228
src/blockchain_db/berkeleydb/db_bdb.cpp
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@ -105,6 +105,8 @@ const char* const BDB_OUTPUT_KEYS = "output_keys";
const char* const BDB_SPENT_KEYS = "spent_keys";
const int BUFFER_LENGTH = 32 * 1024 * 1024;
template<typename T>
struct Dbt_copy: public Dbt
{
@ -575,7 +577,9 @@ void BlockchainBDB::check_open() const
BlockchainBDB::~BlockchainBDB()
{
LOG_PRINT_L3("BlockchainBDB::" << __func__);
if(m_buffer != NULL)
free(m_buffer);
m_buffer = NULL;
if (m_open)
{
close();
@ -584,6 +588,7 @@ BlockchainBDB::~BlockchainBDB()
BlockchainBDB::BlockchainBDB(bool batch_transactions)
{
m_buffer = malloc(BUFFER_LENGTH);
LOG_PRINT_L3("BlockchainBDB::" << __func__);
// initialize folder to something "safe" just in case
// someone accidentally misuses this class...
@ -1389,7 +1394,9 @@ tx_out BlockchainBDB::get_output(const uint64_t& index) const
return tx_out();
}
tx_out_index BlockchainBDB::get_output_tx_and_index_from_global(const uint64_t& index) const
void BlockchainBDB::get_output_tx_and_index(const uint64_t& amount,
std::vector<uint64_t> &offsets,
std::vector<tx_out_index> &indices) const
{
LOG_PRINT_L3("BlockchainBDB::" << __func__);
check_open();
@ -1398,27 +1405,181 @@ tx_out_index BlockchainBDB::get_output_tx_and_index_from_global(const uint64_t&
if (m_env->txn_begin(NULL, txn, 0))
throw0(DB_ERROR("Failed to create a transaction for the db"));
Dbt_copy<uint32_t> k(index);
Dbt_copy<crypto::hash > v;
bdb_cur cur(txn, m_output_amounts);
uint64_t max = 0;
for(const uint64_t& index : offsets)
{
if(index > max)
max = index;
}
auto get_result = m_output_txs->get(txn, &k, &v, 0);
if (get_result == DB_NOTFOUND)
throw1(OUTPUT_DNE("output with given index not in db"));
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch output tx hash"));
// ??? might be a bug, don't always treat as uint64_t
#define DBT_VALUE(dbt) v.get_size() == sizeof(uint64_t) ? \
*((uint64_t *)v.get_data()) : *((uint32_t *)v.get_data()) \
// get returned keypairs count
#define DB_COUNT_RECORDS(dbt, cnt) \
do { \
uint32_t *_p = (uint32_t *) ((uint8_t *)(dbt)->data + \
(dbt)->ulen - sizeof(uint32_t)); \
cnt = 0; \
while(*_p != (uint32_t) -1) { \
_p -= 2; \
++cnt; \
} \
} while(0); \
Dbt_copy<uint64_t> k(amount);
Dbt_copy<uint64_t> v;
uint64_t buflen = 0;
uint64_t t_dbmul = 0;
uint64_t t_dbscan = 0;
TIME_MEASURE_START(db2);
if(max <= 1)
{
for (const uint64_t& index : offsets)
{
TIME_MEASURE_START(t_seek);
crypto::hash tx_hash = v;
auto result = cur->get(&k, &v, DB_SET);
if (result == DB_NOTFOUND)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but amount not found"));
else if (result)
throw0(DB_ERROR("DB error attempting to get an output"));
Dbt_copy<uint64_t> result;
get_result = m_output_indices->get(txn, &k, &result, 0);
if (get_result == DB_NOTFOUND)
throw1(OUTPUT_DNE("output with given index not in db"));
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch output tx index"));
db_recno_t num_elems = 0;
cur->count(&num_elems, 0);
txn.commit();
if (num_elems <= index)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but output not found"));
for (uint64_t i = 0; i < index; ++i)
{
cur->get(&k, &v, DB_NEXT_DUP);
}
uint64_t glob_index = DBT_VALUE(v);
LOG_PRINT_L1("L0->v: " << glob_index);
tx_out_index res = get_output_tx_and_index_from_global(glob_index);
indices.push_back(res);
TIME_MEASURE_FINISH(t_seek);
}
}
else
{
// setup a 256KB minimum buffer size
uint32_t pagesize = 256 * 1024;
// Retrieve only a suitable portion of the kvp data, up to somewhere near
// the maximum offset value being retrieved
buflen = (max + 1) * 4 * sizeof(uint64_t);
buflen = ((buflen / pagesize) + ((buflen % pagesize) > 0 ? 1 : 0)) * pagesize;
bool singlebuff = buflen <= BUFFER_LENGTH;
buflen = buflen < BUFFER_LENGTH ? buflen : BUFFER_LENGTH;
Dbt data;
data.set_data(m_buffer);
data.set_ulen(buflen);
data.set_size(buflen);
data.set_flags(DB_DBT_USERMEM);
uint32_t curcount = 0;
uint32_t blockstart = 0;
for (const uint64_t& index : offsets)
{
// fixme! for whatever reason, the first call to DB_MULTIPLE | DB_SET does not
// retrieve the first value.
if(index <= 1)
{
auto result = cur->get(&k, &v, DB_SET);
if (result == DB_NOTFOUND)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but amount not found"));
else if (result)
throw0(DB_ERROR("DB error attempting to get an output"));
db_recno_t num_elems = 0;
cur->count(&num_elems, 0);
if (num_elems <= index)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but output not found"));
if(index > 0)
cur->get(&k, &v, DB_NEXT_DUP);
}
else
{
while(index >= curcount)
{
TIME_MEASURE_START(t_db1);
try
{
cur->get(&k, &data, DB_MULTIPLE | (curcount == 0 ? DB_SET : DB_NEXT_DUP));
blockstart = curcount;
// skip counting if using single buffer, it actually adds some overhead on some systems.
if(!singlebuff)
{
int count = 0;
DB_COUNT_RECORDS((DBT *) &data, count);
curcount += count;
}
}
catch (const std::exception &e)
{
LOG_PRINT_L0("DB_EXCEPTION: " << e.what());
}
TIME_MEASURE_FINISH(t_db1);
t_dbmul += t_db1;
if(singlebuff)
break;
}
LOG_PRINT_L1("Records returned: " << curcount << " Index: " << index);
TIME_MEASURE_START(t_db2);
DBT *pdata = (DBT *) &data;
uint8_t *value;
uint64_t dlen = 0;
void *pbase = ((uint8_t *)(pdata->data)) + pdata->ulen - sizeof(uint32_t);
uint32_t *p = (uint32_t *) pbase;
if (*p == (uint32_t) -1)
{
value = NULL;
}
else
{
p -= (index - blockstart) * 2; // index * 4 + 2; <- if DB_MULTIPLE_KEY
value = (uint8_t *) pdata->data + *p--;
dlen = *p--;
if (value == (uint8_t *) pdata->data)
value = NULL;
}
if (value != NULL)
{
v = dlen == sizeof(uint64_t) ? *((uint64_t *) value)
: *((uint32_t *) value);
}
TIME_MEASURE_FINISH(t_db2);
t_dbscan += t_db2;
}
uint64_t glob_index = DBT_VALUE(v);
LOG_PRINT_L1("L1->v: " << glob_index);
tx_out_index res = get_output_tx_and_index_from_global(glob_index);
indices.push_back(res);
}
}
TIME_MEASURE_FINISH(db2);
LOG_PRINT_L1("blen: " << buflen << " db1: " << t_dbmul << " db2: " << t_dbscan);
return tx_out_index(tx_hash, result);
cur.close();
txn.commit();
}
tx_out_index BlockchainBDB::get_output_tx_and_index(const uint64_t& amount, const uint64_t& index) const
@ -1571,6 +1732,37 @@ std::vector<uint64_t> BlockchainBDB::get_tx_amount_output_indices(const crypto::
}
tx_out_index BlockchainBDB::get_output_tx_and_index_from_global(const uint64_t& index) const
{
LOG_PRINT_L3("BlockchainBDB::" << __func__);
check_open();
bdb_txn_safe txn;
if (m_env->txn_begin(NULL, txn, 0))
throw0(DB_ERROR("Failed to create a transaction for the db"));
Dbt_copy<uint32_t> k(index);
Dbt_copy<crypto::hash > v;
auto get_result = m_output_txs->get(txn, &k, &v, 0);
if (get_result == DB_NOTFOUND)
throw1(OUTPUT_DNE("output with given index not in db"));
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch output tx hash"));
crypto::hash tx_hash = v;
Dbt_copy<uint64_t> result;
get_result = m_output_indices->get(txn, &k, &result, 0);
if (get_result == DB_NOTFOUND)
throw1(OUTPUT_DNE("output with given index not in db"));
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch output tx index"));
txn.commit();
return tx_out_index(tx_hash, result);
}
bool BlockchainBDB::has_key_image(const crypto::key_image& img) const
{

3
src/blockchain_db/berkeleydb/db_bdb.h
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@ -177,6 +177,7 @@ public:
virtual tx_out_index get_output_tx_and_index_from_global(const uint64_t& index) const;
virtual tx_out_index get_output_tx_and_index(const uint64_t& amount, const uint64_t& index) const;
virtual void get_output_tx_and_index(const uint64_t& amount, std::vector<uint64_t> &offsets, std::vector<tx_out_index> &indices) const;
virtual std::vector<uint64_t> get_tx_output_indices(const crypto::hash& h) const;
virtual std::vector<uint64_t> get_tx_amount_output_indices(const crypto::hash& h) const;
@ -197,6 +198,7 @@ public:
virtual void batch_abort();
virtual void pop_block(block& blk, std::vector<transaction>& txs);
virtual bool has_bulk_indices() const { return true; }
private:
virtual void add_block( const block& blk
@ -254,6 +256,7 @@ private:
uint64_t get_output_global_index(const uint64_t& amount, const uint64_t& index) const;
void check_open() const;
void *m_buffer;
DbEnv* m_env;

2
src/blockchain_db/blockchain_db.h
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@ -472,6 +472,8 @@ public:
// returns the transaction-local reference for the output with <amount> at <index>
// return type is pair of tx hash and index
virtual tx_out_index get_output_tx_and_index(const uint64_t& amount, const uint64_t& index) const = 0;
virtual void get_output_tx_and_index(const uint64_t& amount, std::vector<uint64_t> &offsets, std::vector<tx_out_index> &indices) const = 0;
virtual bool has_bulk_indices() const = 0;
// return a vector of indices corresponding to the global output index for
// each output in the transaction with hash <h>

5
src/blockchain_db/lmdb/db_lmdb.h
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@ -177,6 +177,10 @@ public:
virtual tx_out_index get_output_tx_and_index_from_global(const uint64_t& index) const;
virtual tx_out_index get_output_tx_and_index(const uint64_t& amount, const uint64_t& index) const;
virtual void get_output_tx_and_index(const uint64_t& amount, std::vector<uint64_t> &offsets, std::vector<tx_out_index> &indices) const
{
// do nothing
};
virtual std::vector<uint64_t> get_tx_output_indices(const crypto::hash& h) const;
virtual std::vector<uint64_t> get_tx_amount_output_indices(const crypto::hash& h) const;
@ -198,6 +202,7 @@ public:
virtual void pop_block(block& blk, std::vector<transaction>& txs);
virtual bool has_bulk_indices() const { return false; }
private:
void do_resize(uint64_t size_increase=0);

21
src/cryptonote_core/blockchain.cpp
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@ -39,6 +39,7 @@
#include "tx_pool.h"
#include "blockchain.h"
#include "blockchain_db/blockchain_db.h"
#include "blockchain_db/berkeleydb/db_bdb.h"
#include "cryptonote_format_utils.h"
#include "cryptonote_boost_serialization.h"
#include "cryptonote_config.h"
@ -159,7 +160,13 @@ bool Blockchain::scan_outputkeys_for_indexes(const txin_to_key& tx_in_to_key, vi
// #1 plus relative offset #2.
// TODO: Investigate if this is necessary / why this is done.
std::vector<uint64_t> absolute_offsets = relative_output_offsets_to_absolute(tx_in_to_key.key_offsets);
std::vector<tx_out_index> indices;
// if(typeid(*m_db) == typeid(BlockchainBDB))
if(m_db->has_bulk_indices())
{
m_db->get_output_tx_and_index(tx_in_to_key.amount, absolute_offsets, indices);
}
//std::vector<std::pair<crypto::hash, size_t> >& amount_outs_vec = it->second;
size_t count = 0;
@ -168,7 +175,12 @@ bool Blockchain::scan_outputkeys_for_indexes(const txin_to_key& tx_in_to_key, vi
try
{
// get tx hash and output index for output
auto output_index = m_db->get_output_tx_and_index(tx_in_to_key.amount, i);
tx_out_index output_index;
if(indices.size() == absolute_offsets.size())
output_index = indices.at(count);
else
output_index = m_db->get_output_tx_and_index(tx_in_to_key.amount, i);
// get tx that output is from
auto tx = m_db->get_tx(output_index.first);
@ -2103,6 +2115,7 @@ bool Blockchain::handle_block_to_main_chain(const block& bl, const crypto::hash&
key_images_container keys;
uint64_t fee_summary = 0;
uint64_t t_checktx = 0;
// Iterate over the block's transaction hashes, grabbing each
// from the tx_pool and validating them. Each is then added
@ -2133,6 +2146,7 @@ bool Blockchain::handle_block_to_main_chain(const block& bl, const crypto::hash&
// taken from the tx_pool back to it if the block fails verification.
txs.push_back(tx);
TIME_MEASURE_START(aa);
// validate that transaction inputs and the keys spending them are correct.
if(!check_tx_inputs(tx))
{
@ -2144,6 +2158,8 @@ bool Blockchain::handle_block_to_main_chain(const block& bl, const crypto::hash&
bvc.m_verifivation_failed = true;
break;
}
TIME_MEASURE_FINISH(aa);
t_checktx += aa;
if (!check_for_double_spend(tx, keys))
{
@ -2220,6 +2236,9 @@ bool Blockchain::handle_block_to_main_chain(const block& bl, const crypto::hash&
<< "), coinbase_blob_size: " << coinbase_blob_size << ", cumulative size: " << cumulative_block_size
<< ", " << block_processing_time << "("<< target_calculating_time << "/" << longhash_calculating_time << ")ms");
LOG_PRINT_L0("Height: " << new_height << " blob: " << coinbase_blob_size <<
" cumm: " << cumulative_block_size << " p/t: " << block_processing_time
<< " ("<< target_calculating_time << "/" << longhash_calculating_time << "/" << t_checktx << ")ms");
bvc.m_added_to_main_chain = true;
// appears to be a NOP *and* is called elsewhere. wat?

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