Implement FusedEmbeddingSeqPoolGradKernel with cblas_saxpy (#19770)

zhaify · luotao1 · commit 93c85c930a9e · 2019-09-17T09:48:01.000+08:00
* Implement the operator with sprase matrix multiply

* Update the URL of mklml library.

test=develop

* Disable MKLML implematation when using no-linux.

test=develop

* optimize bp with mkl sparse matrix
test=develop

* tmp add fused_emb_seq layer

* Add the support of padding_idx attribute.

test=develop

* add padding_idx support
test=develop

* implement grad refer lego
test=develop
diff --git a/paddle/fluid/operators/fused/fused_embedding_seq_pool_op.cc b/paddle/fluid/operators/fused/fused_embedding_seq_pool_op.cc
@@ -78,6 +78,12 @@ class FusedEmbeddingSeqPoolOpMaker : public framework::OpProtoAndCheckerMaker {
                          "are supported, sum computes the weighted sum of the "
                          "embedding results for each row.")
         .SetDefault("sum");
+    AddAttr<int64_t>("padding_idx",
+                     "(int64, default -1) "
+                     "If the value is -1, it makes no effect to lookup. "
+                     "Otherwise the given value indicates padding the output "
+                     "with zeros whenever lookup encounters it in Ids.")
+        .SetDefault(kNoPadding);
     // NOTE(minqiyang): grad_inplace is an temporal attribute,
     // please do NOT set this attribute in python layer.
     AddAttr<bool>("grad_inplace",
diff --git a/paddle/fluid/operators/fused/fused_embedding_seq_pool_op.h b/paddle/fluid/operators/fused/fused_embedding_seq_pool_op.h
@@ -33,12 +33,15 @@ using LoDTensor = framework::LoDTensor;
 using SelectedRows = framework::SelectedRows;
 using DDim = framework::DDim;
 
+constexpr int64_t kNoPadding = -1;
+
 #if defined(PADDLE_WITH_MKLML) && !defined(_WIN32) && !defined(__APPLE__) && \
-    !defined(__OSX__) && !defined(PADDLE_WITH_CUDA)
+    !defined(__OSX__)
 template <typename T>
 void prepare_csr_data(const std::vector<uint64_t> &offset,
                       const int64_t *ids_data, const size_t idx_width,
-                      T *csr_vals, int *csr_colmuns, int *csr_row_idx) {
+                      T *csr_vals, int *csr_colmuns, int *csr_row_idx,
+                      int64_t padding_idx = kNoPadding) {
   int val_idx = 0;
   int row_idx = 0;
   csr_row_idx[0] = 0;
@@ -52,9 +55,11 @@ void prepare_csr_data(const std::vector<uint64_t> &offset,
 
       // construct a map for creating csr
       for (size_t j = offset[i]; j < offset[i + 1]; ++j) {
-        unsigned int word_idx =
-            static_cast<unsigned int>(ids_data[idx + j * idx_width]);
-        ++ids_map[word_idx];
+        auto ids_value = ids_data[idx + j * idx_width];
+        if (ids_value != padding_idx) {
+          unsigned int word_idx = static_cast<unsigned int>(ids_value);
+          ++ids_map[word_idx];
+        }
       }
 
       VLOG(4) << "====sequence %d====" << i;
@@ -124,16 +129,17 @@ class FusedEmbeddingSeqPoolKernel : public framework::OpKernel<T> {
         FusedEmbeddingSeqPoolLastDim(table_var->dims(), ids_t->dims());
     const auto &ids_lod = ids_t->lod();
     // in run time, the LoD of ids must be 1
-    PADDLE_ENFORCE(ids_lod.size(), 1UL,
-                   "The LoD level of Input(Ids) must be 1");
+    PADDLE_ENFORCE_EQ(ids_lod.size(), 1UL,
+                      "The LoD level of Input(Ids) must be 1");
     int64_t batch_size = ids_lod[0].size() - 1;
     // in run time, the shape from Ids -> output
     // should be [seq_length, 1] -> [batch_size, last_dim]
     output_t->Resize({batch_size, last_dim});
 
     if (combiner_type == "sum") {
 #if defined(PADDLE_WITH_MKLML) && !defined(_WIN32) && !defined(__APPLE__) && \
-    !defined(__OSX__) && !defined(PADDLE_WITH_CUDA)
+    !defined(__OSX__)
+      int64_t padding_idx = context.Attr<int64_t>("padding_idx");
       auto output = output_t->mutable_data<T>(context.GetPlace());
       int64_t table_height = table_var->dims()[0];
       int64_t table_width = table_var->dims()[1];
@@ -151,7 +157,7 @@ class FusedEmbeddingSeqPoolKernel : public framework::OpKernel<T> {
       auto csr_colmuns = csr_colmuns_t.mutable_data<int>(context.GetPlace());
       auto csr_row_idx = csr_row_idx_t.mutable_data<int>(context.GetPlace());
       prepare_csr_data<T>(offset, ids_t->data<int64_t>(), idx_width, csr_vals,
-                          csr_colmuns, csr_row_idx);
+                          csr_colmuns, csr_row_idx, padding_idx);
 
       const char transa = 'N';
       const T alpha = 1.0;
@@ -226,18 +232,19 @@ class FusedEmbeddingSeqPoolGradKernel : public framework::OpKernel<T> {
       }
     } else {
 #if defined(PADDLE_WITH_MKLML) && !defined(_WIN32) && !defined(__APPLE__) && \
-    !defined(__OSX__) && !defined(PADDLE_WITH_CUDA)
+    !defined(__OSX__)
       auto *ids = context.Input<LoDTensor>("Ids");
       auto *d_output = context.Input<LoDTensor>(framework::GradVarName("Out"));
       auto *d_table = context.Output<LoDTensor>(framework::GradVarName("W"));
+      int64_t padding_idx = context.Attr<int64_t>("padding_idx");
 
       d_table->Resize(table_dim);
       auto *d_table_data = d_table->mutable_data<T>(context.GetPlace());
       memset(d_table_data, 0, d_table->numel() * sizeof(T));
 
       const auto &ids_lod = ids->lod();
-      PADDLE_ENFORCE(ids_lod.size(), 1UL,
-                     "The LoD level of Input(Ids) must be 1");
+      PADDLE_ENFORCE_EQ(ids_lod.size(), 1UL,
+                        "The LoD level of Input(Ids) must be 1");
       const std::vector<uint64_t> offset = ids_lod[0];
       auto len = ids->numel();
       int idx_width = len / offset.back();
@@ -251,23 +258,21 @@ class FusedEmbeddingSeqPoolGradKernel : public framework::OpKernel<T> {
       auto csr_colmuns = csr_colmuns_t.mutable_data<int>(context.GetPlace());
       auto csr_row_idx = csr_row_idx_t.mutable_data<int>(context.GetPlace());
       prepare_csr_data<T>(offset, ids->data<int64_t>(), idx_width, csr_vals,
-                          csr_colmuns, csr_row_idx);
+                          csr_colmuns, csr_row_idx, padding_idx);
 
       auto *d_output_data = d_output->data<T>();
-      const char transa = 'T';
-      const T alpha = 1.0;
-      const T beta = 0.0;
-      const char matdescra[] = {'G', 'L', 'N', 'C'};
-
-      const int m = batch_size * idx_width;
-      const int n = table_dim[1];
-      const int k = table_dim[1];
-
       auto blas = math::GetBlas<platform::CPUDeviceContext, T>(context);
-      blas.CSRMM(&transa, &m, &n, &k, &alpha, matdescra, (const T *)csr_vals,
-                 (const int *)csr_colmuns, (const int *)csr_row_idx,
-                 (const int *)csr_row_idx + 1, d_output_data, &n, &beta,
-                 d_table_data, &n);
+      int width = static_cast<int>(table_dim[1]);
+      int num_seq = batch_size * idx_width;
+      LOG(INFO) << "num seq = " << num_seq << " width = " << width;
+      for (int i = 0; i < num_seq; ++i) {
+        for (int j = csr_row_idx[i]; j < csr_row_idx[i + 1]; ++j) {
+          unsigned int word_idx = csr_colmuns[j];
+          T val = csr_vals[j];
+          blas.AXPY(width, val, d_output_data + i * width,
+                    d_table_data + word_idx * width);
+        }
+      }
 #else
       LOG(ERROR) << "Dense is not supported in fused_embedding_seq_pool_op now";
 #endif
diff --git a/python/paddle/fluid/tests/unittests/test_fused_emb_seq_pool_op.py b/python/paddle/fluid/tests/unittests/test_fused_emb_seq_pool_op.py
@@ -22,38 +22,67 @@
 import paddle.fluid as fluid
 from paddle.fluid.op import Operator
 import paddle.compat as cpt
+import paddle.version as ver
 
 
 class TestFusedEmbeddingSeqPoolOp(OpTest):
     def setUp(self):
         self.op_type = "fused_embedding_seq_pool"
         self.emb_size = 2
-        table = np.random.random((17, self.emb_size)).astype("float32")
-        ids = np.array([[[4], [3]], [[4], [3]], [[2], [1]],
-                        [[16], [1]]]).astype("int64")
-        merged_ids = np.array([4, 2, 16]).astype("int64")
-        ids_expand = np.expand_dims(ids, axis=1)
+        self.table = np.random.random((17, self.emb_size)).astype("float32")
+        self.ids = np.array([[[4], [3]], [[4], [3]], [[2], [1]],
+                             [[16], [1]]]).astype("int64")
+        ids_expand = np.expand_dims(self.ids, axis=1)
         self.lod = [[3, 1]]
         self.attrs = {'is_sparse': True}
-        self.inputs = {'W': table, 'Ids': (ids_expand, self.lod)}
+        self.inputs = {'W': self.table, 'Ids': (ids_expand, self.lod)}
         self.outputs = {
             'Out': np.reshape(
                 np.array([
-                    table[[4, 3]] + table[[4, 3]] + table[[2, 1]],
-                    table[[16, 1]]
+                    self.table[[4, 3]] + self.table[[4, 3]] +
+                    self.table[[2, 1]], self.table[[16, 1]]
                 ]), [len(self.lod[0]), 2 * self.emb_size])
         }
 
     def test_check_output(self):
         self.check_output()
 
     def test_check_grad(self):
-        if fluid.core.is_compiled_with_mkldnn(
-        ) and not fluid.core.is_compiled_with_cuda(
-        ) and 'Linux' in platform.platform():
+        if ver.mkl() == "ON" and 'Linux' in platform.platform():
             self.attrs = {'is_sparse': False}
             self.check_grad(['W'], 'Out', no_grad_set=('Ids'))
 
 
+class TestLookupTableOpWithPadding(TestFusedEmbeddingSeqPoolOp):
+    def test_check_output(self):
+        if ver.mkl() == "ON" and 'Linux' in platform.platform():
+            ids = np.squeeze(self.ids, axis=2)
+            padding_idx = np.random.choice(ids.flatten(), 1)[0]
+            output = list()
+            index = 0
+            for count in self.lod[0]:
+                arr = ids[index:count + index]
+                out = np.reshape(self.table[arr.flatten()],
+                                 [arr.shape[0], arr.shape[1], self.emb_size])
+                idx = np.argwhere(arr == padding_idx)
+                for item in idx:
+                    out[item[0], item[1], :] = np.zeros(self.emb_size)
+                output.append(np.sum(out, 0))
+                index += count
+            self.outputs = {
+                'Out': np.reshape(
+                    np.array(output), [len(self.lod[0]), 2 * self.emb_size])
+            }
+            self.attrs = {'padding_idx': int(padding_idx)}
+            self.check_output()
+
+    def test_check_grad(self):
+        if ver.mkl() == "ON" and 'Linux' in platform.platform():
+            ids = np.squeeze(self.ids, axis=2)
+            padding_idx = np.random.choice(ids.flatten(), 1)[0]
+            self.attrs = {'padding_idx': int(padding_idx), 'is_sparse': False}
+            self.check_grad(['W'], 'Out', no_grad_set=('Ids'))
+
+
 if __name__ == "__main__":
     unittest.main()
