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Wrong result in nd4j's CUDA backend #159

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Atry opened this issue Nov 16, 2017 · 2 comments
Open

Wrong result in nd4j's CUDA backend #159

Atry opened this issue Nov 16, 2017 · 2 comments

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@Atry
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Atry commented Nov 16, 2017

Upstream bug https://github.com/deeplearning4j/nd4j/issues/2271

You can reproduce this bug in NaN-fix branch:

git clone https://github.com/ThoughtWorksInc/DeepLearning.scala.git --branch NaN-fix
cd DeepLearning.scala
sbt plugins-INDArrayLayers/testOnly com.thoughtworks.deeplearning.plugins.NaNSpec
@Atry
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Atry commented Nov 16, 2017

nd4j-bug.log

@Atry Atry changed the title Wrong result for CUDA backends Wrong result in the nd4j's CUDA backend Nov 16, 2017
@Atry Atry changed the title Wrong result in the nd4j's CUDA backend Wrong result in nd4j's CUDA backend Nov 16, 2017
@Atry
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Atry commented Nov 16, 2017 •
edited

The workaround is using single thread only:

import java.util.concurrent.Executors
import scala.concurrent.ExecutionContext
val singleThreadExecutor = Executors.newSingleThreadExecutor()
implicit val singleThreadExecutionContext = ExecutionContext.fromExecutor(singleThreadExecutor)

// Don't import the default ExecutionContext!
// import scala.concurrent.ExecutionContext.Implicits.global

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@Atry