samskalicky commented on a change in pull request #15886: [WIP] Graph Partition
API
URL: https://github.com/apache/incubator-mxnet/pull/15886#discussion_r314927157
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File path: src/c_api/c_api_symbolic.cc
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@@ -1181,3 +1182,59 @@ int MXShallowCopySymbol(SymbolHandle src, SymbolHandle*
out) {
*out = out_sym;
API_END_HANDLE_ERROR(delete out_sym);
}
+
+int MXOptimizeForBackend(SymbolHandle sym_handle,
+ const char* backend_name,
+ SymbolHandle* ret_sym_handle,
+ const bool infer_shape_type,
+ const int dev_type,
+ const int dev_id,
+ const mx_uint len,
+ NDArrayHandle* in_args_handle,
+ const mx_uint num_options,
+ const char** keys,
+ const char** vals) {
+ nnvm::Symbol *s = new nnvm::Symbol();
+ API_BEGIN();
+ nnvm::Symbol *sym = static_cast<nnvm::Symbol *>(sym_handle);
+ *s = sym->Copy();
+ nnvm::Graph orig_g = Symbol2Graph(*s);
+ if (infer_shape_type) {
+ Context default_ctx =
Context::Create(static_cast<Context::DeviceType>(dev_type), dev_id);
+ std::map<std::string, Context> ctx_map;
+ NDArray **in_args_ptr = reinterpret_cast<NDArray**>(in_args_handle);
+ mxnet::ShapeVector arg_shapes(len);
+ nnvm::DTypeVector arg_dtypes(len);
+ StorageTypeVector arg_stypes(len);
+ std::vector<Context> in_arg_ctxes(len);
+ std::vector<Context> aux_state_ctxes;
+ for (mx_uint i = 0; i < len; i++) {
+ const auto &in_arg = *(in_args_ptr[i]);
+ arg_shapes.push_back(in_arg.shape());
+ arg_dtypes.push_back(in_arg.dtype());
+ arg_stypes.push_back(in_arg.storage_type());
+ in_arg_ctxes[i] = in_arg.ctx();
+ }
+ orig_g = common::InferForwardAttrs(orig_g, arg_shapes, arg_dtypes,
arg_stypes, default_ctx,
+ ctx_map, in_arg_ctxes, aux_state_ctxes,
true);
+ }
+ std::vector<std::pair<std::string, std::string>> options_map;
+ for (mx_uint i = 0; i < num_options; ++i) {
+ options_map.emplace_back(keys[i], vals[i]);
+ }
+ const auto backend =
mxnet::op::SubgraphBackendRegistry::Get()->GetSubgraphBackend(backend_name);
+ const auto& subgraph_prop_list = backend->GetSubgraphProperties();
+ for (auto property : subgraph_prop_list) {
+ nnvm::Graph g = orig_g;
+ property->SetAttr("graph", g);
Review comment:
dont think we need this if we're going to pass it into the prePartition
function
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