tvm::runtime::vm::VirtualMachine Class Reference

The virtual machine. More...

#include <vm.h>

Inheritance diagram for tvm::runtime::vm::VirtualMachine:

Collaboration diagram for tvm::runtime::vm::VirtualMachine:

Public Member Functions
virtual void	Init (const std::vector< Device > &devices, const std::vector< AllocatorType > &alloc_types)=0
	Initialize the virtual machine for a set of devices.
virtual void	LoadExecutable (ffi::ObjectPtr< VMExecutable > exec)=0
	Load the executable for the virtual machine.
virtual VMClosure	GetClosure (const ffi::String &func_name)=0
	Get global function in the VM.
virtual void	InvokeClosurePacked (const ffi::ObjectRef &closure_or_packedfunc, ffi::PackedArgs args, ffi::Any *rv)=0
	Invoke closure or packed function using ffi::Function convention.
virtual void	SetInstrument (ffi::Function instrument)=0
	Set an instrumentation function.
template<typename T , typename = std::enable_if_t<std::is_base_of<VMExtension, T>::value>>
T	GetOrCreateExtension ()
	Get or create a VM extension. Once created, the extension will be stored in the VM and held until the VM is destructed.
	~VirtualMachine ()

Static Public Member Functions
static ffi::ObjectPtr< VirtualMachine >	Create ()
	Create a specific instance of VM.
static VirtualMachine *	GetContextPtr (ffi::AnyView arg)
	Helper function for vm closure functions to get the context ptr.

Public Attributes
std::vector< Allocator * >	allocators
	The memory allocators.
std::vector< Device >	devices
	Runtime physical device list.
std::unordered_map< uint32_t, Any >	extensions
	The VM extensions. Mapping from the type index of the extension to the extension instance.

Detailed Description

The virtual machine.

The virtual machine contains all the current execution state, as well as the executable.

The goal is to have a single self-contained object, enabling one to easily pass around VMs, execute them on multiple threads, or serialize them to disk or over the wire.

Constructor & Destructor Documentation

~VirtualMachine()

tvm::runtime::vm::VirtualMachine::~VirtualMachine ( )

inline

Member Function Documentation

Create()

static ffi::ObjectPtr< VirtualMachine > tvm::runtime::vm::VirtualMachine::Create ( )

static

Create a specific instance of VM.

Returns

Created VM

GetClosure()

virtual VMClosure tvm::runtime::vm::VirtualMachine::GetClosure ( const ffi::String &  func_name )

pure virtual

Get global function in the VM.

Parameters

func_name

The name of the function.

Returns

The closure

GetContextPtr()

static VirtualMachine * tvm::runtime::vm::VirtualMachine::GetContextPtr ( ffi::AnyView  arg )

inlinestatic

Helper function for vm closure functions to get the context ptr.

Parameters

arg	The argument value.

GetOrCreateExtension()

template<typename T , typename = std::enable_if_t<std::is_base_of<VMExtension, T>::value>>

T tvm::runtime::vm::VirtualMachine::GetOrCreateExtension ( )

inline

Get or create a VM extension. Once created, the extension will be stored in the VM and held until the VM is destructed.

Template Parameters

T	The type of the extension

Returns

The extension instance

Init()

virtual void tvm::runtime::vm::VirtualMachine::Init ( const std::vector< Device > &  devices, const std::vector< AllocatorType > &  alloc_types  )

pure virtual

Initialize the virtual machine for a set of devices.

Parameters

devices	The set of TVM devices.
alloc_types	The allocator types for each device.

InvokeClosurePacked()

virtual void tvm::runtime::vm::VirtualMachine::InvokeClosurePacked ( const ffi::ObjectRef &  closure_or_packedfunc, ffi::PackedArgs  args, ffi::Any *  rv  )

pure virtual

Invoke closure or packed function using ffi::Function convention.

Parameters

closure_or_packedfunc	A VM closure or a packed_func.
args	The input arguments.
rv	The return value.

LoadExecutable()

virtual void tvm::runtime::vm::VirtualMachine::LoadExecutable ( ffi::ObjectPtr< VMExecutable >  exec )

pure virtual

Load the executable for the virtual machine.

Parameters

exec	The executable.

SetInstrument()

virtual void tvm::runtime::vm::VirtualMachine::SetInstrument ( ffi::Function  instrument )

pure virtual

Set an instrumentation function.

If instrument is present, the function will be called before/after each Call instruction.

bool instrument(func, func_symbol, before_run, args...)

• func: Union[VMClosure, ffi::Function], the function object.
• func_symbol: string, the symbol of the function.
• before_run: bool, whether it is before or after call.
• ret_value: Only valid in after run, otherwise it is null.
• args: the arguments being passed to call.

instrument can return an int which corresponds to the action value.

See also

VMInstrumentAction

Parameters

instrument

The instrument function.

Member Data Documentation

allocators

std::vector<Allocator*> tvm::runtime::vm::VirtualMachine::allocators

The memory allocators.

devices

std::vector<Device> tvm::runtime::vm::VirtualMachine::devices

Runtime physical device list.

extensions

std::unordered_map<uint32_t, Any> tvm::runtime::vm::VirtualMachine::extensions

The VM extensions. Mapping from the type index of the extension to the extension instance.

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The documentation for this class was generated from the following file:

• include/tvm/runtime/vm/vm.h