vt::vrt::collection::balance::RawData struct
#include <src/vt/vrt/collection/balance/model/raw_data.h>

A strictly retrospective view of the recorded object timings.

For use with load balancers, this must typically be stacked beneath a model that predicts future loads, such as NaivePersistence

Base classes

struct LoadModel: Interface for transforming measurements of past object loads into predictions of future object load for load balancing strategies.

Constructors, destructors, conversion operators

RawData() defaulted

Public functions

void updateLoads(PhaseType last_completed_phase) override: Signals that load data for a new phase is available.
auto getModeledLoad(ElementIDStruct object, PhaseOffset when) const -> LoadType override: Provide an estimate of the given object's load during a specified interval.
auto hasRawLoad() const -> bool override: Whether or not the model is based on the RawData model.
auto getRawLoad(ElementIDStruct object, PhaseOffset when) const -> LoadType override
auto hasUserData() const -> bool override: Whether or not the model is based on the RawData model.
auto getUserData(ElementIDStruct object, PhaseOffset when) const -> ElmUserDataType override
auto getComm(PhaseOffset when) const -> CommMapType override
void setLoads(std::unordered_map<PhaseType, LoadMapType> const* proc_load, std::unordered_map<PhaseType, CommMapType> const* proc_comm, std::unordered_map<PhaseType, DataMapType> const* user_data) override: Initialize the model instance with pointers to the measured load data.
auto begin() const -> ObjectIterator override
auto getNumObjects() const -> int override
auto getNumCompletedPhases() const -> unsigned int override
auto getNumSubphases() const -> int override
auto getNumPastPhasesNeeded(unsigned int look_back) const -> unsigned int override: Compute how many phases of past load statistics need to be kept available for the model to use.

Public variables

std::unordered_map<PhaseType, LoadMapType> const * proc_load_
std::unordered_map<PhaseType, CommMapType> const * proc_comm_
std::unordered_map<PhaseType, DataMapType> const * user_data_
PhaseType last_completed_phase_

Function documentation

void vt::vrt::collection::balance::RawData::updateLoads(PhaseType last_completed_phase) override

Signals that load data for a new phase is available.

For models that want to do pre-computation based on measured loads before being asked to provide predictions from them

This would typically be called by LBManager collectively inside an epoch that can be used for global communication in advance of any calls to getModeledLoad()

The setLoads method must have been called before any call to this.