meter

package
v0.29.0-stable-cadence-3 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Nov 8, 2022 License: AGPL-3.0 Imports: 4 Imported by: 1

Documentation

Index

Constants

View Source 
const (
	ComputationKindCreateAccount = 2006
	ComputationKindGetValue      = 2020
	ComputationKindSetValue      = 2026
)

TODO(patrick): rm after https://github.com/onflow/flow-emulator/pull/229 is merged and integrated.

View Source 
const MeterExecutionInternalPrecisionBytes = 16

MeterExecutionInternalPrecisionBytes are the amount of bytes that are used internally by the WeigthedMeter to allow for metering computation smaller than one unit of computation. This allows for more fine weights. A weight of 1 unit of computation is equal to 1<<16. The minimum possible weight is 1/65536.

Variables

View Source 
var (
	// DefaultComputationWeights is the default weights for computation intensities
	// these weighs make the computation metering the same as it was before dynamic execution fees
	DefaultComputationWeights = ExecutionEffortWeights{
		common.ComputationKindStatement:          1 << MeterExecutionInternalPrecisionBytes,
		common.ComputationKindLoop:               1 << MeterExecutionInternalPrecisionBytes,
		common.ComputationKindFunctionInvocation: 1 << MeterExecutionInternalPrecisionBytes,
	}

	// DefaultMemoryWeights are currently hard-coded here. In the future we might like to
	// define this in a contract similar to the computation weights
	DefaultMemoryWeights = ExecutionMemoryWeights{}/* 178 elements not displayed */

)

Functions

func GetStorageKeyValueSizeForTesting added in v0.28.0 

func GetStorageKeyValueSizeForTesting(
	storageKey StorageInteractionKey,
	value flow.RegisterValue) uint64

Types

type ExecutionEffortWeights added in v0.27.0 

type ExecutionEffortWeights map[common.ComputationKind]uint64

type ExecutionMemoryWeights added in v0.27.0 

type ExecutionMemoryWeights map[common.MemoryKind]uint64

type Meter 

type Meter struct {
	MeterParameters
	// contains filtered or unexported fields
}

Meter collects memory and computation usage and enforces limits for any each memory/computation usage call it sums intensity multiplied by the weight of the intensity to the total memory/computation usage metrics and returns error if limits are not met.

func NewMeter added in v0.27.0 

func NewMeter(params MeterParameters) *Meter

NewMeter constructs a new Meter

func (*Meter) ComputationIntensities 

func (m *Meter) ComputationIntensities() MeteredComputationIntensities

ComputationIntensities returns all the measured computational intensities

func (*Meter) GetStorageUpdateSizeMapForTesting added in v0.28.0 

func (m *Meter) GetStorageUpdateSizeMapForTesting() MeteredStorageInteractionMap

func (*Meter) MemoryIntensities 

func (m *Meter) MemoryIntensities() MeteredMemoryIntensities

MemoryIntensities returns all the measured memory intensities

func (*Meter) MergeMeter 

func (m *Meter) MergeMeter(child *Meter)

MergeMeter merges the input meter into the current meter and checks for the limits

func (*Meter) MeterComputation 

func (m *Meter) MeterComputation(kind common.ComputationKind, intensity uint) error

MeterComputation captures computation usage and returns an error if it goes beyond the limit

func (*Meter) MeterEmittedEvent added in v0.28.0 

func (m *Meter) MeterEmittedEvent(byteSize uint64) error

func (*Meter) MeterMemory 

func (m *Meter) MeterMemory(kind common.MemoryKind, intensity uint) error

MeterMemory captures memory usage and returns an error if it goes beyond the limit

func (*Meter) MeterStorageRead added in v0.28.0 

func (m *Meter) MeterStorageRead(
	storageKey StorageInteractionKey,
	value flow.RegisterValue,
	enforceLimit bool) error

MeterStorageRead captures storage read bytes count and returns an error if it goes beyond the total interaction limit and limit is enforced

func (*Meter) MeterStorageWrite added in v0.28.0 

func (m *Meter) MeterStorageWrite(
	storageKey StorageInteractionKey,
	value flow.RegisterValue,
	enforceLimit bool) error

MeterStorageRead captures storage written bytes count and returns an error if it goes beyond the total interaction limit and limit is enforced

func (*Meter) NewChild 

func (m *Meter) NewChild() *Meter

NewChild construct a new Meter instance with the same limits as parent

func (*Meter) TotalBytesOfStorageInteractions added in v0.28.0 

func (m *Meter) TotalBytesOfStorageInteractions() uint64

TotalBytesOfStorageInteractions returns total number of byte read and written from/to storage

func (*Meter) TotalBytesReadFromStorage added in v0.28.0 

func (m *Meter) TotalBytesReadFromStorage() uint64

TotalBytesReadFromStorage returns total number of byte read from storage

func (*Meter) TotalBytesWrittenToStorage added in v0.28.0 

func (m *Meter) TotalBytesWrittenToStorage() uint64

TotalBytesReadFromStorage returns total number of byte written to storage

func (*Meter) TotalComputationUsed 

func (m *Meter) TotalComputationUsed() uint64

TotalComputationUsed returns the total computation used

func (*Meter) TotalEmittedEventBytes added in v0.28.0 

func (m *Meter) TotalEmittedEventBytes() uint64

func (*Meter) TotalMemoryEstimate added in v0.27.0 

func (m *Meter) TotalMemoryEstimate() uint64

TotalMemoryEstimate returns the total memory used

type MeterOptions added in v0.28.0 

type MeterOptions func(*Meter)

type MeterParameters added in v0.28.0 

type MeterParameters struct {
	// contains filtered or unexported fields
}

func DefaultParameters added in v0.28.0 

func DefaultParameters() MeterParameters

func (MeterParameters) ComputationWeights added in v0.28.0 

func (params MeterParameters) ComputationWeights() ExecutionEffortWeights

func (MeterParameters) MemoryWeights added in v0.28.0 

func (params MeterParameters) MemoryWeights() ExecutionMemoryWeights

func (MeterParameters) TotalComputationLimit added in v0.28.0 

func (params MeterParameters) TotalComputationLimit() uint

TotalComputationLimit returns the total computation limit

func (MeterParameters) TotalMemoryLimit added in v0.28.0 

func (params MeterParameters) TotalMemoryLimit() uint64

TotalMemoryLimit returns the total memory limit

func (MeterParameters) WithComputationLimit added in v0.28.0 

func (params MeterParameters) WithComputationLimit(limit uint) MeterParameters

func (MeterParameters) WithComputationWeights added in v0.28.0 

func (params MeterParameters) WithComputationWeights(
	weights ExecutionEffortWeights,
) MeterParameters

func (MeterParameters) WithEventEmitByteLimit added in v0.28.0 

func (params MeterParameters) WithEventEmitByteLimit(
	byteLimit uint64,
) MeterParameters

func (MeterParameters) WithMemoryLimit added in v0.28.0 

func (params MeterParameters) WithMemoryLimit(limit uint64) MeterParameters

func (MeterParameters) WithMemoryWeights added in v0.28.0 

func (params MeterParameters) WithMemoryWeights(
	weights ExecutionMemoryWeights,
) MeterParameters

func (MeterParameters) WithStorageInteractionLimit added in v0.28.0 

func (params MeterParameters) WithStorageInteractionLimit(
	maxStorageInteractionLimit uint64,
) MeterParameters

type MeteredComputationIntensities added in v0.26.0 

type MeteredComputationIntensities map[common.ComputationKind]uint

type MeteredMemoryIntensities added in v0.26.0 

type MeteredMemoryIntensities map[common.MemoryKind]uint

type MeteredStorageInteractionMap added in v0.28.0 

type MeteredStorageInteractionMap map[StorageInteractionKey]uint64

type StorageInteractionKey added in v0.28.0 

type StorageInteractionKey struct {
	Owner, Key string
}

Source Files

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