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Change election scheduler to consider previous balance (#4022)

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* Teach the scheduler priority queue to consider both the block's and previous block's balances and prioritize to the max of both.
* Move priority calculations in to the election_scheduler and directly accept the priority value in prioritization::push.
This commit is contained in:
clemahieu 2022-12-09 12:19:52 +00:00 • committed by GitHub
commit c96f37b34c
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4 changed files with 29 additions and 30 deletions
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46
nano/core_test/prioritization.cpp
View file

@ -129,7 +129,7 @@ TEST (prioritization, index_max)
TEST (prioritization, insert_Gxrb)
{
nano::prioritization prioritization;
prioritization.push (1000, block0 ());
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
ASSERT_EQ (1, prioritization.size ());
ASSERT_EQ (1, prioritization.bucket_size (48));
}
@ -137,7 +137,7 @@ TEST (prioritization, insert_Gxrb)
TEST (prioritization, insert_Mxrb)
{
nano::prioritization prioritization;
prioritization.push (1000, block1 ());
prioritization.push (1000, block1 (), nano::Mxrb_ratio);
ASSERT_EQ (1, prioritization.size ());
ASSERT_EQ (1, prioritization.bucket_size (13));
}
@ -146,8 +146,8 @@ TEST (prioritization, insert_Mxrb)
TEST (prioritization, insert_same_priority)
{
nano::prioritization prioritization;
prioritization.push (1000, block0 ());
prioritization.push (1000, block2 ());
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
prioritization.push (1000, block2 (), nano::Gxrb_ratio);
ASSERT_EQ (2, prioritization.size ());
ASSERT_EQ (2, prioritization.bucket_size (48));
}
@ -156,8 +156,8 @@ TEST (prioritization, insert_same_priority)
TEST (prioritization, insert_duplicate)
{
nano::prioritization prioritization;
prioritization.push (1000, block0 ());
prioritization.push (1000, block0 ());
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
ASSERT_EQ (1, prioritization.size ());
ASSERT_EQ (1, prioritization.bucket_size (48));
}
@ -165,8 +165,8 @@ TEST (prioritization, insert_duplicate)
TEST (prioritization, insert_older)
{
nano::prioritization prioritization;
prioritization.push (1000, block0 ());
prioritization.push (1100, block2 ());
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
prioritization.push (1100, block2 (), nano::Gxrb_ratio);
ASSERT_EQ (block0 (), prioritization.top ());
prioritization.pop ();
ASSERT_EQ (block2 (), prioritization.top ());
@ -177,7 +177,7 @@ TEST (prioritization, pop)
{
nano::prioritization prioritization;
ASSERT_TRUE (prioritization.empty ());
prioritization.push (1000, block0 ());
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
ASSERT_FALSE (prioritization.empty ());
prioritization.pop ();
ASSERT_TRUE (prioritization.empty ());
@ -186,15 +186,15 @@ TEST (prioritization, pop)
TEST (prioritization, top_one)
{
nano::prioritization prioritization;
prioritization.push (1000, block0 ());
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
ASSERT_EQ (block0 (), prioritization.top ());
}
TEST (prioritization, top_two)
{
nano::prioritization prioritization;
prioritization.push (1000, block0 ());
prioritization.push (1, block1 ());
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
prioritization.push (1, block1 (), nano::Mxrb_ratio);
ASSERT_EQ (block0 (), prioritization.top ());
prioritization.pop ();
ASSERT_EQ (block1 (), prioritization.top ());
@ -205,11 +205,11 @@ TEST (prioritization, top_two)
TEST (prioritization, top_round_robin)
{
nano::prioritization prioritization;
prioritization.push (1000, blockzero ());
prioritization.push (1000, blockzero (), 0);
ASSERT_EQ (blockzero (), prioritization.top ());
prioritization.push (1000, block0 ());
prioritization.push (1000, block1 ());
prioritization.push (1100, block3 ());
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
prioritization.push (1000, block1 (), nano::Mxrb_ratio);
prioritization.push (1100, block3 (), nano::Mxrb_ratio);
prioritization.pop (); // blockzero
EXPECT_EQ (block1 (), prioritization.top ());
prioritization.pop ();
@ -223,8 +223,8 @@ TEST (prioritization, top_round_robin)
TEST (prioritization, trim_normal)
{
nano::prioritization prioritization{ 1 };
prioritization.push (1000, block0 ());
prioritization.push (1100, block2 ());
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
prioritization.push (1100, block2 (), nano::Gxrb_ratio);
ASSERT_EQ (1, prioritization.size ());
ASSERT_EQ (block0 (), prioritization.top ());
}
@ -232,8 +232,8 @@ TEST (prioritization, trim_normal)
TEST (prioritization, trim_reverse)
{
nano::prioritization prioritization{ 1 };
prioritization.push (1100, block2 ());
prioritization.push (1000, block0 ());
prioritization.push (1100, block2 (), nano::Gxrb_ratio);
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
ASSERT_EQ (1, prioritization.size ());
ASSERT_EQ (block0 (), prioritization.top ());
}
@ -241,11 +241,11 @@ TEST (prioritization, trim_reverse)
TEST (prioritization, trim_even)
{
nano::prioritization prioritization{ 2 };
prioritization.push (1000, block0 ());
prioritization.push (1100, block2 ());
prioritization.push (1000, block0 (), nano::Gxrb_ratio);
prioritization.push (1100, block2 (), nano::Gxrb_ratio);
ASSERT_EQ (1, prioritization.size ());
ASSERT_EQ (block0 (), prioritization.top ());
prioritization.push (1000, block1 ());
prioritization.push (1000, block1 (), nano::Mxrb_ratio);
ASSERT_EQ (2, prioritization.size ());
ASSERT_EQ (block0 (), prioritization.top ());
prioritization.pop ();

4
nano/node/election_scheduler.cpp
View file

@ -37,8 +37,10 @@ void nano::election_scheduler::activate (nano::account const & account_a, nano::
debug_assert (block != nullptr);
if (node.ledger.dependents_confirmed (transaction, *block))
{
auto balance = node.ledger.balance (transaction, hash);
auto previous_balance = node.ledger.balance (transaction, conf_info.frontier);
nano::lock_guard<nano::mutex> lock{ mutex };
priority.push (account_info.modified, block);
priority.push (account_info.modified, block, std::max (balance, previous_balance));
notify ();
}
}

7
nano/node/prioritization.cpp
View file

@ -82,13 +82,10 @@ std::size_t nano::prioritization::index (nano::uint128_t const & balance) const
* Push a block and its associated time into the prioritization container.
* The time is given here because sideband might not exist in the case of state blocks.
*/
void nano::prioritization::push (uint64_t time, std::shared_ptr<nano::block> block)
void nano::prioritization::push (uint64_t time, std::shared_ptr<nano::block> block, nano::amount const & priority)
{
auto was_empty = empty ();
auto block_has_balance = block->type () == nano::block_type::state || block->type () == nano::block_type::send;
debug_assert (block_has_balance || block->has_sideband ());
auto balance = block_has_balance ? block->balance () : block->sideband ().balance;
auto & bucket = buckets[index (balance.number ())];
auto & bucket = buckets[index (priority.number ())];
bucket.emplace (value_type{ time, block });
if (bucket.size () > std::max (decltype (maximum){ 1 }, maximum / buckets.size ()))
{

2
nano/node/prioritization.hpp
View file

@ -55,7 +55,7 @@ class prioritization final
public:
prioritization (uint64_t maximum = 250000u);
void push (uint64_t time, std::shared_ptr<nano::block> block);
void push (uint64_t time, std::shared_ptr<nano::block> block, nano::amount const & priority);
std::shared_ptr<nano::block> top () const;
void pop ();
std::size_t size () const;