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shuffling doesn't crash

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This commit is contained in:
Hieu Hoang 2016-09-15 17:03:45 +01:00
parent 78f85fcfa4
commit 00d688b9ba
1 changed files with 43 additions and 22 deletions
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59
src/sgd.cu
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@ -33,8 +33,8 @@ void SGD::Run()
Tensor xt({(int)maxBatchSize_, (int)numExamples}, 0.0f);
Tensor yt({(int)maxBatchSize_, (int)numClasses_}, 0.0f);
//vector<size_t> shuffle = CreateShuffle(numExamples);
vector<size_t> shuffle;
vector<size_t> shuffle = CreateShuffle(numExamples);
//vector<size_t> shuffle;
for (size_t numEpoch = 0; numEpoch < epochs_; ++numEpoch) {
std::cerr << "Starting epoch #" << numEpoch << std::endl;
@ -59,13 +59,14 @@ void SGD::Run()
std::vector<size_t> SGD::CreateShuffle(size_t numExamples) const {
vector<size_t> ret(numExamples);
std::iota(ret.begin(), ret.end(), 1);
std::iota(ret.begin(), ret.end(), 0);
std::random_shuffle ( ret.begin(), ret.end() );
/*
cerr << "shuffled" << endl;
for (size_t i = 0; i < ret.size(); ++i) {
cerr << ret[i] << " ";
}
*/
return ret;
}
@ -76,37 +77,57 @@ void SGD::PrepareBatch(
const std::vector<size_t> &shuffle,
Tensor& xt,
Tensor& yt) {
/*
std::vector<float> x(xData_.begin() + startId * numFeatures_,
xData_.begin() + endId * numFeatures_);
std::vector<float> y(yData_.begin() + startId * numClasses_,
yData_.begin() + endId * numClasses_);
/*
*/
std::vector<float> x(batchSize * numFeatures_);
std::vector<float> y(batchSize * numClasses_);
std::vector<float>::iterator startXIter = x.begin();
std::vector<float>::iterator startYIter = y.begin();
/*
cerr << "startId=" << startId
<< " " << endId
<< " " << batchSize
<< endl;
cerr << "numExamples=" << shuffle.size() << endl;
cerr << "numFeatures_=" << numFeatures_ << " " << numClasses_ << endl;
cerr << "sizes=" << x.size()
<< " " << y.size()
<< " " << xData_.size()
<< " " << yData_.size()
<< endl;
*/
size_t startXId = 0;
size_t startYId = 0;
for (size_t i = startId; i < endId; ++i) {
size_t startXDataId = i * numFeatures_;
size_t startYDataId = i * numClasses_;
size_t endXDataId = startXDataId + batchSize * numFeatures_;
size_t endYDataId = startYDataId + batchSize * numClasses_;
size_t ind = shuffle[i];
size_t startXDataId = ind * numFeatures_;
size_t startYDataId = ind * numClasses_;
size_t endXDataId = startXDataId + numFeatures_;
size_t endYDataId = startYDataId + numClasses_;
/*
cerr << "i=" << i
<< " " << ind
<< " " << startXDataId << "-" << endXDataId
<< " " << startYDataId << "-" << endYDataId
<< endl;
*/
std::copy(xData_.begin() + startXDataId,
xData_.begin() + endXDataId,
startXIter);
x.begin() + startXId);
std::copy(yData_.begin() + startYDataId,
yData_.begin() + endYDataId,
startYIter);
y.begin() + startYId);
startXIter += batchSize * numFeatures_;
startYIter += batchSize * numClasses_;
startXId += numFeatures_;
startYId += numClasses_;
}
*/
xt.set(x);
yt.set(y);
}