fix elugradgrad test fail & error message opt (#30171)

* fix elugradgrad test fail and error message opt

* fix unitest,test=develop

* Update prroi_pool_op.h

fix error message

* opt message,test=develop

* fix ci fail,test=develop

paddle/fluid/operators/activation_op.h

@@ -1598,7 +1598,7 @@ struct ELUGradGradFunctor : public BaseActivationFunctor<T> {
       auto dout = framework::EigenVector<T>::Flatten(
           GET_DATA_SAFELY(dOut, "Output", "DOut", "ELUGradGrad"));
       dx.device(*d) = ddx * dout * static_cast<T>(alpha) * x.exp() *
-                      (x < static_cast<T>(0)).template cast<T>();
+                      (x <= static_cast<T>(0)).template cast<T>();
     }
 
     if (ddOut) {

paddle/fluid/operators/prroi_pool_op.h

@@ -293,19 +293,24 @@ class CPUPRROIPoolOpKernel : public framework::OpKernel<T> {
     } else {
       PADDLE_ENFORCE_EQ(rois->lod().empty(), false,
                         platform::errors::InvalidArgument(
-                            "the lod of Input ROIs should not be empty when "
+                            "The lod of Input ROIs should not be empty when "
                             "BatchRoINums is None!"));
       auto rois_lod = rois->lod().back();
       int rois_batch_size = rois_lod.size() - 1;
-      PADDLE_ENFORCE_EQ(
-          rois_batch_size, batch_size,
-          platform::errors::InvalidArgument("the rois_batch_size and input(X) "
-                                            "batch_size should be the same."));
+      PADDLE_ENFORCE_EQ(rois_batch_size, batch_size,
+                        platform::errors::InvalidArgument(
+                            "The rois_batch_size and input(X)'s "
+                            "batch_size should be the same but received"
+                            "rois_batch_size: %d and batch_size: %d",
+                            rois_batch_size, batch_size));
       int rois_num_with_lod = rois_lod[rois_batch_size];
       PADDLE_ENFORCE_EQ(
           rois_num_with_lod, rois_num,
-          platform::errors::InvalidArgument(
-              "the rois_num from input and lod must be the same"));
+          platform::errors::InvalidArgument("The rois_num from input should be "
+                                            "equal to the rois_num from lod, "
+                                            "but received rois_num from input: "
+                                            "%d and the rois_num from lod: %d.",
+                                            rois_num_with_lod, rois_num));
 
       // calculate batch id index for each roi according to LoD
       for (int n = 0; n < rois_batch_size; ++n) {

python/paddle/fluid/tests/unittests/test_activation_nn_grad.py

@@ -78,9 +78,9 @@ class TestLeakyReluDoubleGradCheck(unittest.TestCase):
 class TestELUDoubleGradCheck(unittest.TestCase):
     @prog_scope()
     def func(self, place):
-        shape = [2, 3, 6, 6]
+        shape = [2, 4, 4, 4]
         eps = 1e-6
-        alpha = 1.1
+        alpha = 0.2
         dtype = np.float64
         SEED = 0