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Feature/error handling in paddle #1149

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merged 13 commits into from
Jan 19, 2017
Merged

Feature/error handling in paddle #1149

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0248031
Add Status
reyoung Jan 12, 2017
6c20e08
Try using status to handle Paddle Error
reyoung Jan 12, 2017
741637e
Add printf method to Status.
reyoung Jan 16, 2017
8aefc30
Fix compile error.
reyoung Jan 17, 2017
3d01c60
Stash
reyoung Jan 17, 2017
9bc1203
Add more comments, also add __must_check.
reyoung Jan 18, 2017
8605544
Add some comments to compiler.h
reyoung Jan 18, 2017
ec790e1
Rename Status => Error.
reyoung Jan 18, 2017
699d18f
Change unittest variable name
reyoung Jan 18, 2017
5a15c70
Make Error interface cleaner
reyoung Jan 18, 2017
a6d4a31
Follow comments
reyoung Jan 19, 2017
c88dec2
Fix typo
reyoung Jan 19, 2017
843fb2e
Make code more readable
reyoung Jan 19, 2017
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126 changes: 98 additions & 28 deletions paddle/gserver/activations/ActivationFunction.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -69,8 +69,14 @@ static ClassRegistrar<ActivationFunction> gActivationRegistrar;
class IdentityActivation : public ActivationFunction {
public:
static const std::string name;
void forward(Argument& act) { (void)act; }
void backward(Argument& act) { (void)act; }
Status forward(Argument& act) {
(void)act;
return Status();
}
Status backward(Argument& act) {
(void)act;
return Status();
}
const std::string& getName() const { return name; }
};
const std::string IdentityActivation::name = "";
Expand All @@ -86,8 +92,14 @@ static InitFunction __reg_activation__identity([] {
* \f]
*/
BEGIN_DEFINE_ACTIVATION(sigmoid)
void forward(Argument& act) { act.value->sigmoid(*act.value); }
void backward(Argument& act) { act.grad->sigmoidDerivative(*act.value); }
Status forward(Argument& act) {
act.value->sigmoid(*act.value);
return Status();
}
Status backward(Argument& act) {
act.grad->sigmoidDerivative(*act.value);
return Status();
}
END_DEFINE_ACTIVATION(sigmoid)

/**
Expand All @@ -103,9 +115,12 @@ MatrixPtr sftMaxDot_;
MatrixPtr one_;

public:
void forward(Argument& act) { act.value->softmax(*act.value); }
Status forward(Argument& act) {
act.value->softmax(*act.value);
return Status();
}

void backward(Argument& act) {
Status backward(Argument& act) {
MatrixPtr outputV = act.value;
MatrixPtr outputG = act.grad;

Expand Down Expand Up @@ -137,6 +152,7 @@ void backward(Argument& act) {

act.grad->softmaxDerivative(*act.value, *sftMaxSum_);
}
return Status();
}
END_DEFINE_ACTIVATION(softmax)

Expand All @@ -151,8 +167,11 @@ ACTIVATION_CLASS_NAME(softmax) softmax_;
Argument argument_;

public:
void forward(Argument& act) {
CHECK_EQ(act.value->getWidth(), 1UL);
Status forward(Argument& act) {
if (act.value->getWidth() != 1UL) {
return Status(
"Input width for each timestep of sequence softmax should be 1");
}

if (!argument_.value) {
argument_.value = Matrix::create(nullptr,
Expand All @@ -169,10 +188,14 @@ void forward(Argument& act) {

auto starts = act.sequenceStartPositions->getVector(useGpu(act.deviceId));
act.value->sequenceSoftmax(*act.value, *starts);
return Status();
}

void backward(Argument& act) {
CHECK_EQ(act.grad->getWidth(), 1UL);
Status backward(Argument& act) {
if (act.value->getWidth() != 1UL) {
return Status(
"Input width for each timestep of sequence softmax should be 1");
}

size_t numSequences = act.getNumSequences();
const int* starts = act.sequenceStartPositions->getData(false);
Expand All @@ -186,6 +209,7 @@ void backward(Argument& act) {

softmax_.backward(argument_);
}
return Status();
}
END_DEFINE_ACTIVATION(sequence_softmax)

Expand All @@ -200,9 +224,15 @@ END_DEFINE_ACTIVATION(sequence_softmax)
* 0 otherwise.
*/
BEGIN_DEFINE_ACTIVATION(relu)
void forward(Argument& act) { act.value->relu(*act.value); }
Status forward(Argument& act) {
act.value->relu(*act.value);
return Status();
}

void backward(Argument& act) { act.grad->reluDerivative(*act.value); }
Status backward(Argument& act) {
act.grad->reluDerivative(*act.value);
return Status();
}
END_DEFINE_ACTIVATION(relu)

/**
Expand All @@ -219,9 +249,15 @@ END_DEFINE_ACTIVATION(relu)
* TODO(yuyang18): Remove magic number 24 or make it configuable.
*/
BEGIN_DEFINE_ACTIVATION(brelu)
void forward(Argument& act) { act.value->brelu(*act.value); }
Status forward(Argument& act) {
act.value->brelu(*act.value);
return Status();
}

void backward(Argument& act) { act.grad->breluDerivative(*act.value); }
Status backward(Argument& act) {
act.grad->breluDerivative(*act.value);
return Status();
}
END_DEFINE_ACTIVATION(brelu)

/**
Expand All @@ -231,9 +267,15 @@ END_DEFINE_ACTIVATION(brelu)
* \f]
*/
BEGIN_DEFINE_ACTIVATION(tanh)
void forward(Argument& act) { act.value->tanh(*act.value); }
Status forward(Argument& act) {
act.value->tanh(*act.value);
return Status();
}

void backward(Argument& act) { act.grad->tanhDerivative(*act.value); }
Status backward(Argument& act) {
act.grad->tanhDerivative(*act.value);
return Status();
}
END_DEFINE_ACTIVATION(tanh)

/**
Expand All @@ -248,10 +290,14 @@ real a, b;

public:
ACTIVATION_CLASS_NAME(stanh)() : a(1.7159), b(2. / 3.) {}
void forward(Argument& act) { act.value->scaledTanh(*act.value, a, b); }
Status forward(Argument& act) {
act.value->scaledTanh(*act.value, a, b);
return Status();
}

void backward(Argument& act) {
Status backward(Argument& act) {
act.grad->scaledTanhDerivative(*act.value, a, b);
return Status();
}
END_DEFINE_ACTIVATION(stanh)

Expand All @@ -262,9 +308,15 @@ END_DEFINE_ACTIVATION(stanh)
* \f]
*/
BEGIN_DEFINE_ACTIVATION(softrelu)
void forward(Argument& act) { act.value->softrelu(*act.value); }
Status forward(Argument& act) {
act.value->softrelu(*act.value);
return Status();
}

void backward(Argument& act) { act.grad->softreluDerivative(*act.value); }
Status backward(Argument& act) {
act.grad->softreluDerivative(*act.value);
return Status();
}
END_DEFINE_ACTIVATION(softrelu)

/**
Expand All @@ -280,7 +332,7 @@ END_DEFINE_ACTIVATION(softrelu)
* 0 if z=0
*/
BEGIN_DEFINE_ACTIVATION(abs)
void forward(Argument& act) {
Status forward(Argument& act) {
SetDevice device(act.deviceId);
Matrix::resizeOrCreate(act.in,
act.value->getHeight(),
Expand All @@ -290,9 +342,13 @@ void forward(Argument& act) {

act.in->copyFrom(*act.value);
act.value->abs2(*act.value);
return Status();
}

void backward(Argument& act) { act.grad->absDerivative(*act.in); }
Status backward(Argument& act) {
act.grad->absDerivative(*act.in);
return Status();
}
END_DEFINE_ACTIVATION(abs)

/**
Expand All @@ -302,7 +358,7 @@ END_DEFINE_ACTIVATION(abs)
* \f]
*/
BEGIN_DEFINE_ACTIVATION(square)
void forward(Argument& act) {
Status forward(Argument& act) {
SetDevice device(act.deviceId);
Matrix::resizeOrCreate(act.in,
act.value->getHeight(),
Expand All @@ -312,9 +368,13 @@ void forward(Argument& act) {

act.in->copyFrom(*act.value);
act.value->square2(*act.value);
return Status();
}

void backward(Argument& act) { act.grad->squareDerivative(*act.in); }
Status backward(Argument& act) {
act.grad->squareDerivative(*act.in);
return Status();
}
END_DEFINE_ACTIVATION(square)

/**
Expand All @@ -324,9 +384,15 @@ END_DEFINE_ACTIVATION(square)
* \f]
*/
BEGIN_DEFINE_ACTIVATION(exponential)
void forward(Argument& act) { act.value->exp2(*act.value); }
Status forward(Argument& act) {
act.value->exp2(*act.value);
return Status();
}

void backward(Argument& act) { act.grad->expDerivative(*act.value); }
Status backward(Argument& act) {
act.grad->expDerivative(*act.value);
return Status();
}
END_DEFINE_ACTIVATION(exponential)

/**
Expand All @@ -336,7 +402,7 @@ END_DEFINE_ACTIVATION(exponential)
* \f]
*/
BEGIN_DEFINE_ACTIVATION(log)
void forward(Argument& act) {
Status forward(Argument& act) {
SetDevice device(act.deviceId);
Matrix::resizeOrCreate(act.in,
act.value->getHeight(),
Expand All @@ -346,9 +412,13 @@ void forward(Argument& act) {

act.in->copyFrom(*act.value);
act.value->log2(*act.value);
return Status();
}

void backward(Argument& act) { act.grad->dotDiv(*act.grad, *act.in); }
Status backward(Argument& act) {
act.grad->dotDiv(*act.grad, *act.in);
return Status();
}
END_DEFINE_ACTIVATION(log)

ActivationFunction* ActivationFunction::create(const std::string& type) {
Expand Down
5 changes: 3 additions & 2 deletions paddle/gserver/activations/ActivationFunction.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ limitations under the License. */
#pragma once
#include <string>
#include <vector>
#include "paddle/utils/Status.h"

namespace paddle {

Expand Down Expand Up @@ -48,7 +49,7 @@ class ActivationFunction {
*
* Usually, act is Layer::output_
*/
virtual void forward(Argument& act) = 0;
virtual Status forward(Argument& act) = 0;

/**
* @brief Backward propagaion
Expand All @@ -57,7 +58,7 @@ class ActivationFunction {
* - Before calling backward(), act.grad = dE / dy, where E is the error/cost
* - After backward() returns, act.grad = dE / dx = (dE/dy) * (dy/dx)
*/
virtual void backward(Argument& act) = 0;
virtual Status backward(Argument& act) = 0;

virtual const std::string& getName() const = 0;
};
Expand Down
7 changes: 5 additions & 2 deletions paddle/gserver/layers/Layer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ limitations under the License. */

#include "paddle/math/SparseMatrix.h"
#include "paddle/utils/Logging.h"
#include "paddle/utils/Status.h"

#include "AddtoLayer.h"
#include "CRFLayer.h"
Expand Down Expand Up @@ -334,7 +335,8 @@ void Layer::showOutputStats() {

void Layer::forwardActivation() {
/* activation */
activation_->forward(output_);
auto status = activation_->forward(output_);
CHECK(status.isOK()) << status.what();

/* dropout */
if (config_.drop_rate() > 0) {
Expand Down Expand Up @@ -372,7 +374,8 @@ void Layer::backwardActivation() {
oGrad->dotMul(*oGrad, *dropOutMask_);
}

activation_->backward(output_);
auto status = activation_->backward(output_);
CHECK(status.isOK()) << status.what();
}

void Layer::forwardDropOut() {
Expand Down
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