feat(mge/imperative): add name, make_h2d, dump_graph to graph runtime

GitOrigin-RevId: b8681a31a81502f12340dafd56c1b4d466b22020

imperative/python/megengine/core/tensor/megbrain_graph.py

@@ -78,6 +78,14 @@ class Graph(_imperative_rt.ComputingGraph):
         opnode = InputNode(*args, device=device, dtype=dtype, shape=shape, graph=self)
         return opnode.outputs[0]
 
+    def make_h2d(self, *, dtype, device):
+        device = as_device(device).to_c()
+        return self._wrap(_imperative_rt.make_h2d(self, device, dtype))
+
+
+def dump(*args):
+    return _imperative_rt.dump_graph([i._node for i in args])
+
 
 class VarNode(TensorBase):
     def __init__(self, node: _imperative_rt.VarNode):
@@ -92,6 +100,14 @@ class VarNode(TensorBase):
     def op(self):
         return self.graph._wrap(self._node.owner)
 
+    @property
+    def name(self):
+        return self._node.name
+
+    @name.setter
+    def name(self, name):
+        self._node.name = name
+
     @property
     def dtype(self):
         return self._node.dtype
@@ -118,6 +134,14 @@ class OpNode:
     def graph(self) -> Graph:
         return self._node.graph
 
+    @property
+    def name(self):
+        return self._node.name
+
+    @name.setter
+    def name(self, name):
+        self._node.name = name
+
     @property
     def inputs(self):
         return tuple(map(self.graph._wrap, self._node.inputs))

imperative/python/src/graph_rt.cpp

@@ -11,6 +11,7 @@
 
 #include "./graph_rt.h"
 
+#include "megbrain/serialization/serializer.h"
 #include "megbrain/imperative/opr_utility.h"
 #include "megbrain/opr/io.h"
 #include "megbrain/opr/basic_arith.h"
@@ -47,7 +48,8 @@ void init_graph_rt(py::module m) {
     py::class_<cg::VarNode, GraphNodePtr<cg::VarNode>>(m, "VarNode")
         .def_property_readonly("owner", [](cg::VarNode* v) {return v->owner_opr();})
         .def_property_readonly("graph", [](cg::VarNode* v) {return v->owner_graph();})
-        .def_property_readonly("name", py::overload_cast<>(&VarNode::name, py::const_))
+        .def_property("name", py::overload_cast<>(&VarNode::name, py::const_),
+                      py::overload_cast<std::string>(&VarNode::name))
         .def_property_readonly("dtype", [](cg::VarNode* v) {return v->dtype();})
         .def_property_readonly("comp_node", [](cg::VarNode* v) {return v->comp_node();})
         .def_property_readonly("shape", [](cg::VarNode* v) -> const TensorShape* {
@@ -75,7 +77,8 @@ void init_graph_rt(py::module m) {
 
     py::class_<cg::OperatorNodeBase, GraphNodePtr<cg::OperatorNodeBase>>(m, "OperatorNode")
         .def_property_readonly("graph", [](cg::OperatorNodeBase* opr) {return opr->owner_graph();})
-        .def_property_readonly("name", py::overload_cast<>(&cg::OperatorNodeBase::name, py::const_))
+        .def_property("name", py::overload_cast<>(&cg::OperatorNodeBase::name, py::const_),
+                      py::overload_cast<std::string>(&cg::OperatorNodeBase::name))
         .def_property_readonly("inputs", [](cg::OperatorNodeBase* opr) {
                 return to_tuple(opr->input());
             })
@@ -99,6 +102,15 @@ void init_graph_rt(py::module m) {
             })
         .def_property_readonly("options", py::overload_cast<>(&cg::ComputingGraph::options));
 
+    m.def("dump_graph", [](const std::vector<VarNode*>& dest_vars) {
+        using namespace mgb::serialization;
+        std::vector<uint8_t> buf;
+        auto dumper = GraphDumper::make(OutputFile::make_vector_proxy(&buf));
+        SymbolVarArray symvars(dest_vars.begin(), dest_vars.end());
+        dumper->dump(symvars);
+        return py::bytes(reinterpret_cast<const char*>(&buf[0]), buf.size());
+    });
+
 #define CURRENT_CLASS cg::ComputingGraph::Options
 
     auto PyComputingGraphOptions = py::class_<cg::ComputingGraph::Options>(PyComputingGraph, "Options")
@@ -198,6 +210,20 @@ void init_graph_rt(py::module m) {
             return opr::ImmutableTensor::make(*graph, hv, OperatorNodeConfig(cn)).node();
         });
 
+    m.def("make_h2d", [](cg::ComputingGraph& graph, CompNode cn, DType dtype, std::optional<std::string> name) {
+            if (!cn.valid()) {
+                throw py::type_error("device must be valid");
+            }
+            if (!dtype.valid()) {
+                throw py::type_error("dtype must be valid");
+            }
+            OperatorNodeConfig config;
+            if (name) {
+                config.name(*name);
+            }
+            return opr::Host2DeviceCopy::make(graph, std::make_shared<HostTensorND>(cn, dtype), config).node();
+        }, py::arg(), py::arg(), py::arg(), py::arg() = py::none());
+
     m.def("input_callback", [input_callback](std::function<DeviceTensorND(void)> callback,
                                              const CompNode& comp_node,
                                              const DType& dtype,