xrpl::node_store::Sequence Class Reference

Deterministic generator of a reproducible sequence of random NodeObjects. More...

#include <NodeStoreBench.h>

Collaboration diagram for xrpl::node_store::Sequence:

Public Member Functions
	Sequence (std::uint8_t prefix)
uint256	key (std::size_t n)
std::shared_ptr< NodeObject >	obj (std::size_t n)
void	batch (std::size_t n, Batch &b, std::size_t size)

Private Attributes
beast::xor_shift_engine	gen_
std::uint8_t	prefix_
std::discrete_distribution< std::uint32_t >	dType_
std::uniform_int_distribution< std::uint32_t >	dSize_

Static Private Attributes
static constexpr auto	kMinSize = 250
static constexpr auto	kMaxSize = 1250

Detailed Description

Deterministic generator of a reproducible sequence of random NodeObjects.

Indexing is stable: obj(n) and key(n) always return the same value for a given n, regardless of call order, because the engine is reseeded from n on every call.

Using different prefixes guarantees the two key spaces are disjoint for the fetch-miss workloads.

Definition at line 64 of file NodeStoreBench.h.

Constructor & Destructor Documentation

Sequence()

xrpl::node_store::Sequence::Sequence ( std::uint8_t prefix )

explicit

Definition at line 76 of file NodeStoreBench.h.

Member Function Documentation

key()

uint256 xrpl::node_store::Sequence::key

(

std::size_t

n

)

Definition at line 89 of file NodeStoreBench.h.

obj()

std::shared_ptr< NodeObject > xrpl::node_store::Sequence::obj

(

std::size_t

n

)

Definition at line 101 of file NodeStoreBench.h.

batch()

void xrpl::node_store::Sequence::batch	(	std::size_t	n,
		Batch &	b,
		std::size_t	size )

Definition at line 116 of file NodeStoreBench.h.

Member Data Documentation

kMinSize

auto xrpl::node_store::Sequence::kMinSize = 250

staticconstexprprivate

Definition at line 67 of file NodeStoreBench.h.

kMaxSize

auto xrpl::node_store::Sequence::kMaxSize = 1250

staticconstexprprivate

Definition at line 68 of file NodeStoreBench.h.

gen_

beast::xor_shift_engine xrpl::node_store::Sequence::gen_

private

Definition at line 70 of file NodeStoreBench.h.

prefix_

std::uint8_t xrpl::node_store::Sequence::prefix_

private

Definition at line 71 of file NodeStoreBench.h.

dType_

std::discrete_distribution<std::uint32_t> xrpl::node_store::Sequence::dType_

private

Definition at line 72 of file NodeStoreBench.h.

dSize_

std::uniform_int_distribution<std::uint32_t> xrpl::node_store::Sequence::dSize_

private

Definition at line 73 of file NodeStoreBench.h.