copy the data when createSparseMatrix

paddle/gserver/layers/CostLayer.cpp

@@ -462,29 +462,49 @@ bool MultiBinaryLabelCrossEntropy::init(const LayerMap& layerMap,
 
 void MultiBinaryLabelCrossEntropy::forwardImp(Matrix& output, Argument& label,
                                               Matrix& target) {
-  label.idsToSparseMatrix(output.getWidth(), useGpu_);
+  MatrixPtr value = nullptr;
+  if (label.ids) {
+    CHECK(!label.value);
+    value = Matrix::createSparseMatrix(
+        label.ids->getSize(), output.getWidth(), label.ids->getSize(),
+        NO_VALUE, SPARSE_CSR, false, useGpu_);
+    label.idsToSparseMatrix(value);
+  } else {
+    CHECK(label.value);
+    value = label.value;
+  }
 
-  if (dynamic_cast<CpuSparseMatrix*>(label.value.get()) ||
-      dynamic_cast<GpuSparseMatrix*>(label.value.get())) {
-    target.multiBinaryLabelCrossEntropy(output, *label.value);
+  if (dynamic_cast<CpuSparseMatrix*>(value.get()) ||
+      dynamic_cast<GpuSparseMatrix*>(value.get())) {
+    target.multiBinaryLabelCrossEntropy(output, *value);
   } else {
     Matrix::resizeOrCreate(targetPerDim_, output.getHeight(), output.getWidth(),
                            false, useGpu_);
 
-    targetPerDim_->binaryLabelCrossEntropy(output, *label.value);
+    targetPerDim_->binaryLabelCrossEntropy(output, *value);
     targetPerDim_->rowSum(target);
   }
 }
 
 void MultiBinaryLabelCrossEntropy::backwardImp(
     Matrix& output, Argument& label, Matrix& outputG) {
-  label.idsToSparseMatrix(output.getWidth(), useGpu_);
+  MatrixPtr value = nullptr;
+  if (label.ids) {
+    CHECK(!value);
+    value = Matrix::createSparseMatrix(
+        label.ids->getSize(), output.getWidth(), label.ids->getSize(),
+        NO_VALUE, SPARSE_CSR, false, useGpu_);
+    label.idsToSparseMatrix(value);
+  } else {
+    CHECK(label.value);
+    value = label.value;
+  }
 
-  if (dynamic_cast<CpuSparseMatrix*>(label.value.get()) ||
-      dynamic_cast<GpuSparseMatrix*>(label.value.get())) {
-    outputG.multiBinaryLabelCrossEntropyBp(output, *label.value);
+  if (dynamic_cast<CpuSparseMatrix*>(value.get()) ||
+      dynamic_cast<GpuSparseMatrix*>(value.get())) {
+    outputG.multiBinaryLabelCrossEntropyBp(output, *value);
   } else {
-    outputG.binaryLabelCrossEntropyBp(output, *label.value);
+    outputG.binaryLabelCrossEntropyBp(output, *value);
   }
 }
 

paddle/parameter/Argument.cpp

@@ -572,25 +572,41 @@ void Argument::subArgFrom(const Argument& input, size_t offset, size_t height,
   }
 }
 
-void Argument::idsToSparseMatrix(int width, bool useGpu) {
-  if (ids) {
-    CHECK(!value);
-    int height = ids->getSize();
-    int nnz = height;
-    auto rows = IVector::create(height + 1, useGpu);
-    auto cols = IVector::create(nnz, useGpu);
-    rows->setElement(0, 0);
-    for (int i = 0; i < height; i ++) {
-      int id = ids->getElement(i);
-      CHECK_LT(id, width);
-      rows->setElement(i + 1, i + 1);
-      cols->setElement(i, id);
-    }
-    value = Matrix::createSparseMatrix(
-        nullptr, rows->getData(), cols->getData(),
-        height, width, nnz, NO_VALUE, SPARSE_CSR, false, useGpu);
+void Argument::idsToSparseMatrix(MatrixPtr sparse_mat) {
+  int height = ids->getSize();
+  int width = sparse_mat->getWidth();
+
+  CpuIVector cpu_ids(height);
+  cpu_ids.copyFrom(*ids);
+  int *id_data = cpu_ids.getData();
+
+  int *rows = nullptr;
+  int *cols = nullptr;
+  if (sparse_mat->useGpu()) {
+      auto gpu_sparse_mat =
+              dynamic_cast<GpuSparseMatrix*>(sparse_mat.get());
+      rows = gpu_sparse_mat->rows_;
+      cols = gpu_sparse_mat->cols_;
   } else {
-    CHECK(value);
+      rows = sparse_mat->getRows();
+      cols = sparse_mat->getCols();
+  }
+
+  rows[0] = 0;
+  for (int i = 0; i < height; i ++) {
+    int id = id_data[i];
+    CHECK_LT(id, width);
+    rows[i + 1] = i + 1;
+    cols[i] = id;
+  }
+
+  if (sparse_mat->useGpu()) {
+    auto gpu_sparse_mat =
+            dynamic_cast<GpuSparseMatrix*>(sparse_mat.get());
+    hl_memcpy_csr_matrix(gpu_sparse_mat->sMatrix_.get(),
+                         nullptr, rows, cols,
+                         HPPL_STREAM_DEFAULT);
+    hl_stream_synchronize(HPPL_STREAM_DEFAULT);
   }
 }
 

paddle/parameter/Argument.h

@@ -289,11 +289,9 @@ struct Argument {
 
   /*
     @brief    convert the ids vector to value as a sparse matrix
-              the ids vector keeps valid
-    @param    the matrix width (id range)
-    @useGpu
+    @param[out]   the output sparse_mat (already allocated)
   */
-  void idsToSparseMatrix(int width, bool useGpu);
+  void idsToSparseMatrix(MatrixPtr sparse_mat);
 };
 
 }  // namespace paddle