[Unity] Add Relax multi-device e2e cases

python/tvm/driver/build_module.py

@@ -243,20 +243,33 @@ def build(
 
     if not isinstance(inputs, (dict, container.Map)):
         target = Target.current() if target is None else target
-        target = target if target else "llvm"
-        target_input_mod = {target: input_mod}
+        if target is None and isinstance(input_mod, tvm.IRModule):
+            target_mod = {}
+            for gvar, func in input_mod.functions.items():
+                tgt = func.attrs["target"] if func.attrs and "target" in func.attrs else "llvm"
+                if tgt not in target_mod:
+                    target_mod[tgt] = {}
+                target_mod[tgt][gvar] = func
+
+            target_input_mod = {}
+            for tgt in target_mod.keys():
+                tir_mod = tvm.IRModule(target_mod[tgt])
+                tir_mod.with_attrs(input_mod.attrs)
+                target_input_mod[tgt] = tir_mod
+        else:
+            target_input_mod = {target: input_mod}
     else:
-        target_input_mod = inputs
+        target_input_mod = {tgt: lower(mod) for tgt, mod in inputs.items()}
 
     # Because modules can be created from a variety of sources, we annotate them
     # with the relevant attributes here to ensure they propagate
     annotated_mods = {}
-    for tar, mod in target_input_mod.items():
-        if not isinstance(tar, (str, Target)):
+    for tgt, mod in target_input_mod.items():
+        if not isinstance(tgt, (str, Target)):
             raise ValueError("The key of inputs must be str or " "Target when inputs is dict.")
         if not isinstance(mod, tvm.IRModule):
-            raise ValueError("inputs must be Schedule, IRModule," "or dict of str to IRModule.")
-        annotated_mods[tar] = mod.with_attr("runtime", runtime)
+            raise ValueError("inputs must be Schedule, IRModule, " "or dict of str to IRModule.")
+        annotated_mods[tgt] = mod.with_attr("runtime", runtime)
 
     # TODO(mbs): Both CompilationConfig and TIRToRuntime implement the same host target
     #  defaulting logic, but there's currently no way to get back the decided host.

python/tvm/relax/utils.py

@@ -28,7 +28,7 @@
 from .expr import Tuple as rx_Tuple
 from .expr import Expr, ShapeExpr, Function, PrimValue, StringImm, te_tensor
 from ..te import Tensor as te_Tensor, create_prim_func
-from ..ir import Array, Attrs, Type, Map
+from ..ir import Array, Attrs, Type, Map, VDevice
 from .struct_info import PrimStructInfo, ShapeStructInfo, TensorStructInfo
 
 
@@ -418,6 +418,24 @@ def _populate_used_vars(expr):
         diff = used_vars - bound_vars
         return list(diff)
 
+    def _get_vdevice(arg: Any) -> Optional[VDevice]:
+        """get the virtual device from arguments."""
+        vdevice = None
+        if isinstance(arg, Expr):  # type: ignore
+            if isinstance(arg.struct_info, TensorStructInfo):
+                vdevice = arg.struct_info.vdevice
+        elif isinstance(arg, (list, Array, tuple)):
+            for x in arg:
+                vdevice = _get_vdevice(x)
+                if vdevice is not None:
+                    return vdevice
+        elif isinstance(arg, (dict, Map)):
+            for k in arg:
+                vdevice = _get_vdevice(arg[k])
+                if vdevice is not None:
+                    return vdevice
+        return vdevice
+
     def _shape_with_old_tir_var(
         shape_values: List[tir.PrimExpr], tir_var_inverse_map: Dict[tir.Var, tir.PrimExpr]
     ):
@@ -456,7 +474,11 @@ def _shape_with_old_tir_var(
     tir_var_inverse_map = {v: k for k, v in tir_var_map.items()}
 
     output_sinfo = [
-        TensorStructInfo(_shape_with_old_tir_var(out.shape, tir_var_inverse_map), out.dtype)
+        TensorStructInfo(
+            _shape_with_old_tir_var(out.shape, tir_var_inverse_map),
+            out.dtype,
+            _get_vdevice(args),
+        )
         for out in outs
     ]
 

python/tvm/relax/vm_build.py

@@ -79,7 +79,7 @@ def jit(self, fcompile=None, addons=None, **kwargs) -> tvm.runtime.Module:
             vm = tvm.relax.VirtualMachine(rt_mod, tvm.cuda())
         """
 
-        # TODO(tvm-team): Update runtime.Module interfac
+        # TODO(tvm-team): Update runtime.Module interface
         # to query these properties as bitmask.
         def _not_runnable(x):
             return x.type_key in ("c", "static_library")
@@ -179,13 +179,17 @@ def _vmcodegen(
     raise ValueError(f"Unknown exec_mode {exec_mode}")
 
 
-def _autodetect_system_lib_req(target: tvm.target.Target, system_lib):
+def _autodetect_system_lib_req(
+    target: Optional[tvm.target.Target] = None, system_lib: Optional[bool] = None
+):
     """Automatically detect system lib requirement"""
-    host = target if target.host is None else target.host
-    if system_lib is None:
-        system_lib = False
-        if "wasm" in host.attrs.get("mtriple", ""):
-            system_lib = True
+    if target is not None:
+        host = target if target.host is None else target.host
+        if system_lib is None:
+            system_lib = False
+            if "wasm" in host.attrs.get("mtriple", ""):
+                system_lib = True
+
     if system_lib:
         # use packed-func to avoid relay dep.
         return tvm.get_global_func("relay.backend.CreateRuntime")("cpp", {"system-lib": system_lib})
@@ -194,7 +198,7 @@ def _autodetect_system_lib_req(target: tvm.target.Target, system_lib):
 
 def _vmlink(
     builder: "relax.ExecBuilder",
-    target: Union[str, tvm.target.Target],
+    target: Optional[Union[str, tvm.target.Target]],
     tir_mod: Optional[tvm.IRModule] = None,
     ext_libs: List[tvm.runtime.Module] = None,
     params: Optional[Dict[str, list]] = None,
@@ -213,8 +217,10 @@ def _vmlink(
     builder: relax.ExecBuilder
         Builder used to collect executables.
 
-    target : Union[str, tvm.target.Target]
+    target : Optional[Union[str, tvm.target.Target]]
         A build target which can have optional host side compilation target.
+        If the target is not specified, the target in the vdevice list will be used.
+        For multi-target compilation, the vdevice should be annotated.
 
     tir_mod: IRModule
         The input TIR IRModule to be linked together.
@@ -239,14 +245,16 @@ def _vmlink(
     lib = None
     if tir_mod is not None:
         lib = tvm.build(
-            tir_mod, target=target, runtime=_autodetect_system_lib_req(target, system_lib)
+            tir_mod,
+            target=target,
+            runtime=_autodetect_system_lib_req(target, system_lib),
         )
     return Executable(_ffi_api.VMLink(builder, target, lib, ext_libs, params))  # type: ignore
 
 
 def build(
     mod: tvm.IRModule,
-    target: Union[str, tvm.target.Target],
+    target: Optional[Union[str, tvm.target.Target]] = None,
     params: Optional[Dict[str, list]] = None,
     pipeline: Union[None, str, tvm.transform.Pass] = "default_build",
     exec_mode: str = "bytecode",
@@ -261,7 +269,7 @@ def build(
     mod: IRModule
         The input IRModule to be built.
 
-    target : Union[str, tvm.target.Target]
+    target : Optional[Union[str, tvm.target.Target]]
         A build target which can have optional host side compilation target.
 
         When TVM compiles device specific program such as CUDA,

python/tvm/runtime/relax_vm.py

@@ -54,7 +54,7 @@ def __init__(
 
         Parameters
         ----------
-        mod: Union[tvm.runtime.Module, tvm.relax.Executable]
+        rt_mod: Union[tvm.runtime.Module, tvm.relax.Executable]
             Runtime module exported by the result of build.
 
         device : Union[Device, List[Device]]
@@ -107,11 +107,6 @@ def _setup_device(self, dev: Device, memory_cfg: Union[str, Dict[Device, str]])
                 )
             devs = [dev]
 
-        if any(dev.device_type % RPC_SESS_MASK == tvm.cpu().device_type for dev in devs[:-1]):
-            raise RuntimeError(
-                "CPU host is required to be the last element of the device list if provided."
-            )
-
         # CPU is required for executing shape functions
         if devs[-1].device_type % RPC_SESS_MASK != tvm.cpu().device_type:
             devs.append(tvm.cpu())

python/tvm/testing/utils.py

@@ -832,6 +832,16 @@ def _any_gpu_exists():
     )
 
 
+def _multi_gpu_exists():
+    return (
+        (tvm.cuda(0).exist and tvm.cuda(1).exist)
+        or (tvm.rocm(0).exist and tvm.rocm(1).exist)
+        or (tvm.opencl(0).exist and tvm.opencl(1).exist)
+        or (tvm.metal(0).exist and tvm.metal(1).exist)
+        or (tvm.vulkan(0).exist and tvm.vulkan(1).exist)
+    )
+
+
 # Mark a test as requiring llvm to run
 requires_llvm = Feature(
     "llvm", "LLVM", cmake_flag="USE_LLVM", target_kind_enabled="llvm", target_kind_hardware="llvm"
@@ -847,6 +857,16 @@ def _any_gpu_exists():
 # :py:func:`tvm.testing.requires_gpu`.
 uses_gpu = requires_gpu(support_required="optional")
 
+# Mark a test as requiring multiple GPUs to run.
+requires_multi_gpu = Feature("multi_gpu", run_time_check=_multi_gpu_exists)
+
+# Mark to differentiate tests that use multiple GPUs in some capacity.
+#
+# These tests will be run on test nodes with multiple GPUs.
+# To mark a test that must have multiple GPUs present to run, use
+# :py:func:`tvm.testing.requires_multi_gpu`.
+uses_multi_gpu = requires_multi_gpu(support_required="optional")
+
 # Mark a test as requiring the x86 Architecture to run.
 requires_x86 = Feature(
     "x86", "x86 Architecture", run_time_check=lambda: platform.machine() == "x86_64"

src/ir/module.cc

@@ -324,7 +324,7 @@ void IRModuleNode::Update(const IRModule& mod) {
 
 IRModule IRModuleNode::ShallowCopy() {
   return IRModule(this->functions, this->type_definitions, this->Imports(), this->source_map,
-                  this->attrs);
+                  this->attrs, this->global_infos);
 }
 
 std::pair<IRModule, GlobalVar> IRModule::FromExprInContext(

src/relax/transform/call_tir_rewrite.cc

@@ -18,7 +18,8 @@
  */
 /*!
  * \file src/relax/transform/call_tir_rewrite.cc
- * \brief Perform explicit tensor allocation for call_tir.
+ * \brief Perform explicit tensor allocation for call_tir,
+ *        call_tir_inplace, and call_dps_packed.
  */
 #include <tvm/relax/attrs/op.h>
 #include <tvm/relax/expr_functor.h>
@@ -28,6 +29,7 @@
 #include <tvm/tir/op.h>
 
 #include "../../relay/transforms/pattern_utils.h"
+#include "utils.h"
 
 namespace tvm {
 namespace relax {
@@ -43,6 +45,19 @@ namespace relax {
 
 class CallTIRMutator : public ExprMutator {
  public:
+  explicit CallTIRMutator(const IRModule& mod) : ExprMutator(mod), mod_(std::move(mod)) {}
+
+  IRModule Run() {
+    for (const auto& [gv, func] : mod_->functions) {
+      if (func->IsInstance<FunctionNode>()) {
+        auto updated_func = Downcast<Function>(this->VisitExpr(func));
+        builder_->UpdateFunction(gv, Downcast<BaseFunc>(updated_func));
+      }
+    }
+    return builder_->GetContextIRModule();
+  }
+
+ private:
   using ExprMutator::VisitExpr_;
   Expr VisitExpr_(const CallNode* call) override {
     // post-order mutation
@@ -65,11 +80,15 @@ class CallTIRMutator : public ExprMutator {
         const TensorStructInfo& tensor_sinfo = _tensor_sinfo.value();
         ICHECK(tensor_sinfo->shape.defined())
             << "the TensorStructInfo shape of call_tir has not populated";
+        int dev_index = 0;
+        if (tensor_sinfo->vdevice.defined()) {
+          dev_index = GetDeviceIndex(mod_, tensor_sinfo->vdevice.value());
+        }
         if (!is_inplace) {
           outs.push_back(
-              builder_->Emit(Call(alloc_tensor_op,  //
+              builder_->Emit(Call(alloc_tensor_op,
                                   {Downcast<ShapeExpr>(tensor_sinfo->shape.value()),
-                                   DataTypeImm(tensor_sinfo->dtype), PrimValue::Int64(0)},  //
+                                   DataTypeImm(tensor_sinfo->dtype), PrimValue::Int64(dev_index)},
                                   Attrs()),
                              "alloc"));
         } else {
@@ -150,16 +169,20 @@ class CallTIRMutator : public ExprMutator {
 
     return GetRef<Expr>(call);
   }
-};
 
-Expr CallTIRRewrite(const Expr& e) { return CallTIRMutator().VisitExpr(e); }
+  /*! \brief The context IRModule. */
+  IRModule mod_;
+};
 
 namespace transform {
 
 Pass CallTIRRewrite() {
-  runtime::TypedPackedFunc<Function(Function, IRModule, PassContext)> pass_func =
-      [=](Function f, IRModule m, PassContext pc) { return Downcast<Function>(CallTIRRewrite(f)); };
-  return CreateFunctionPass(pass_func, 0, "CallTIRRewrite", {});
+  runtime::TypedPackedFunc<IRModule(IRModule, PassContext)> pass_func =
+      [=](IRModule mod, PassContext pc) { return CallTIRMutator(mod).Run(); };
+  return CreateModulePass(/*pass_function=*/pass_func,
+                          /*opt_level=*/0,
+                          /*pass_name=*/"CallTIRRewrite",
+                          /*required=*/{});
 }
 
 TVM_REGISTER_GLOBAL("relax.transform.CallTIRRewrite").set_body_typed(CallTIRRewrite);

src/relax/transform/legalize_ops.cc

@@ -26,6 +26,7 @@
 #include <tvm/relax/analysis.h>
 #include <tvm/relax/expr_functor.h>
 #include <tvm/relax/op_attr_types.h>
+#include <tvm/relax/struct_info.h>
 #include <tvm/relax/transform.h>
 
 namespace tvm {
@@ -72,6 +73,14 @@ class LegalizeMutator : public ExprMutator {
         builder_->UpdateFunction(gv, Downcast<BaseFunc>(updated_func));
       }
     }
+    // Fill the "kTarget" attribute of PrimFunc
+    for (const auto& [gv, func] : builder_->GetContextIRModule()->functions) {
+      const tir::PrimFuncNode* prim_func;
+      if (tmap_.count(gv) && (prim_func = func.as<tir::PrimFuncNode>())) {
+        auto f = WithAttr(GetRef<tir::PrimFunc>(prim_func), tvm::attr::kTarget, tmap_[gv]);
+        builder_->UpdateFunction(gv, f);
+      }
+    }
     return builder_->GetContextIRModule();
   }
 
@@ -109,6 +118,33 @@ class LegalizeMutator : public ExprMutator {
     return Call(call_pure_packed_op, ret_args, ret->attrs, ret->sinfo_args);
   }
 
+  Target GetTarget(const Array<StructInfo>& sinfos) {
+    for (auto sinfo : sinfos) {
+      if (const auto* tinfo = sinfo.as<TensorStructInfoNode>()) {
+        if (tinfo->vdevice.defined()) {
+          auto vdevice = tinfo->vdevice.value();
+          if (vdevice->target.defined()) {
+            return vdevice->target;
+          }
+        }
+      } else if (const auto* tup_sinfo = sinfo.as<TupleStructInfoNode>()) {
+        return GetTarget(tup_sinfo->fields);
+      }
+    }
+    return Target();
+  }
+
+  void SaveTarget(const Expr& expr) {
+    if (expr->IsInstance<CallNode>()) {
+      auto call = Downcast<Call>(expr);
+      auto target = GetTarget(call->sinfo_args);
+      const GlobalVarNode* gvar_node;
+      if (target.defined() && (gvar_node = call->args[0].as<GlobalVarNode>())) {
+        this->tmap_.Set(GetRef<GlobalVar>(gvar_node), target);
+      }
+    }
+  }
+
   Expr VisitExpr_(const CallNode* call) final {
     Call visited_call = Downcast<Call>(this->VisitExprPostOrder_(call));
     static const auto& legalize_map = Op::GetAttrMap<FLegalize>("FLegalize");
@@ -164,6 +200,10 @@ class LegalizeMutator : public ExprMutator {
       builder_->BeginBindingBlock();
     }
     Expr legalized = legalization_func(builder_, visited_call);
+
+    // Save the expected target info. into tmap_
+    SaveTarget(legalized);
+
     legalized = builder_->Normalize(legalized);
 
     BindingBlock prologue = builder_->EndBlock();
@@ -196,6 +236,8 @@ class LegalizeMutator : public ExprMutator {
   IRModule mod_;
   /*! \brief The customized legalization function map. */
   Map<String, PackedFunc> cmap_;
+  /*! \brief The map from GlobalVar of PrimFunc to compilation Target. */
+  Map<GlobalVar, Target> tmap_;
   /*!
    * \brief A boolean value indicating if to print warnings for CallNode whose op's
    * legalization function is not registered.