compiler/io.github.aplcornell.viaduct.selection/SimpleCostEstimator

SimpleCostEstimator

class SimpleCostEstimator(protocolComposer: ProtocolComposer, costRegime: SimpleCostRegime) : CostEstimator<IntegerCost>

Cost estimator for Local, Replication and ABY protocols.

Approximates two communication features:

  • NUM_MESSAGES: number of messages exchanged between hosts

  • BYTES_TRANSFERRED: size of data transferred between hosts

in high latency regimes, NUM_MESSAGES is weighted more; in low latency regimes, BYTES_TRANSFERRED is weighted more.

costs for ABY mixed protocol derived from Table 2 in Ishaq et al, CCS 2019

  • cost is from microsecond figure for non-amortized n=1, divided by 10 and rounded

Constructors

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fun SimpleCostEstimator(protocolComposer: ProtocolComposer, costRegime: SimpleCostRegime)

Types

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object Companion

Functions

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open override fun communicationCost(source: Protocol, destination: Protocol, host: Host?): Cost<IntegerCost>

Estimated cost of sending a message from source to destination relative to host in destination. If host is null, then computes the cost for all the hosts in destination.

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open override fun executionCost(stmt: SimpleStatementNode, protocol: Protocol): Cost<IntegerCost>

Estimated cost of executing stmt at protocol.

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open override fun featureWeights(): Cost<IntegerCost>

Cost weights of features.

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open override fun zeroCost(): Cost<IntegerCost>

"Identity" cost.