Add note about the time cost and change HTTPS to HTTP to avoid unable to download (#24044)

cmake/third_party.cmake

@@ -210,7 +210,7 @@ list(APPEND third_party_deps extern_eigen3 extern_gflags extern_glog extern_boos
 list(APPEND third_party_deps extern_zlib extern_dlpack extern_warpctc extern_threadpool)
 
 # download file
-set(CUDAERROR_URL  "https://paddlepaddledeps.bj.bcebos.com/cudaErrorMessage.tar.gz" CACHE STRING "" FORCE)
+set(CUDAERROR_URL  "http://paddlepaddledeps.bj.bcebos.com/cudaErrorMessage.tar.gz" CACHE STRING "" FORCE)
 file_download_and_uncompress(${CUDAERROR_URL} "cudaerror")
 
 if(WITH_AMD_GPU)

python/paddle/fluid/clip.py

@@ -843,6 +843,8 @@ def append_gradient_clip_ops(param_grads):
 
 
 # change wrong mapping relation between param & grad in clip op
+# Note: This function is sensitive to the time cost of the network with gradient clipping 
+# and should not be changed easily. If you must change, please test the time cost.
 def _correct_clip_op_role_var(params_grads, param_new_grad_name_dict):
     block_id_list = []
     if len(param_new_grad_name_dict) == 0: