Fix dataset sink judge in cache enable case.

mindspore/ccsrc/pipeline/jit/init.cc

@@ -401,6 +401,7 @@ PYBIND11_MODULE(_c_expression, m) {
     .def("insert_accumu_init_info", &PSContext::InsertAccumuInitInfo, "Insert accumulation initialization value.")
     .def("clone_hash_table", &PSContext::CloneHashTable, "Clone a hash table.")
     .def("set_cache_enable", &PSContext::set_cache_enable, "Set ps mode cache enable or not.")
+    .def("cache_enable", &PSContext::cache_enable, "Get ps mode cache enable or not.")
     .def("set_rank_id", &PSContext::set_rank_id, "Set rank id for worker on ps mode.")
     .def("set_server_mode", &PSContext::set_server_mode, "Set server mode.")
     .def("server_mode", &PSContext::server_mode, "Get server mode.")

mindspore/python/mindspore/parallel/_ps_context.py

@@ -279,6 +279,10 @@ def _set_cache_enable(cache_enable):
     ps_context().set_cache_enable(cache_enable)
 
 
+def _cache_enable():
+    return ps_context().cache_enable()
+
+
 def _set_rank_id(rank_id):
     ps_context().set_rank_id(rank_id)
 

mindspore/python/mindspore/train/model.py

@@ -31,7 +31,7 @@ from .callback import _InternalCallbackParam, RunContext, _CallbackManager, Call
 from .. import context
 from ..parallel._utils import _get_parallel_mode, _get_device_num, _get_global_rank, \
     _get_parameter_broadcast, _device_number_check, _parameter_broadcast_check, _parallel_predict_check
-from ..parallel._ps_context import _is_role_worker, _is_role_pserver, _is_role_sched, _is_ps_mode
+from ..parallel._ps_context import _is_role_worker, _is_role_pserver, _is_role_sched, _is_ps_mode, _cache_enable
 from ..nn.metrics import Loss
 from .. import nn
 from ..boost import AutoBoost
@@ -883,7 +883,7 @@ class Model:
                              "is not equal to value in Model.train, got {} and {} separately."
                              .format(train_dataset._warmup_epoch, epoch))
 
-        if dataset_sink_mode and _is_ps_mode():
+        if dataset_sink_mode and _is_ps_mode() and not _cache_enable():
             raise ValueError("Parameter server mode does not support 'data_sink_mode=True'.")
 
         Validator.check_is_int(sink_size)