A Disco interactive session. It allows users to interact with the Disco command queue with various PackedFunc calling convention. More...

#include <session.h>

Inheritance diagram for tvm::runtime::SessionObj:

Collaboration diagram for tvm::runtime::SessionObj:

Public Member Functions
virtual	~SessionObj ()=default

template<typename... Args>
DRef TVM_ALWAYS_INLINE	CallPacked (const DRef &func, Args &&... args)
	Call a PackedFunc on workers providing variadic arguments. More...

virtual DRef	CallWithPacked (const TVMArgs &args)=0
	Call packed function on each worker using a packed sequence. The calling convention: The first element must be DiscoAction::kCallPacked, The second element must be 0, which will later be updated by the session to return reg_id The thirtd element is the function to be called. More...

virtual DRef	GetGlobalFunc (const std::string &name)=0
	Get a global functions on workers. More...

virtual void	CopyFromWorker0 (const NDArray &host_array, const DRef &remote_array)=0
	Copy an NDArray from worker-0 to the controler-side NDArray. More...

virtual void	CopyToWorker0 (const NDArray &host_array, const DRef &remote_array)=0
	Copy the controler-side NDArray to worker-0. More...

virtual void	SyncWorker (int worker_id)=0
	Synchrnoize the controler with a worker, and it will wait until worker finishes executing this instruction. More...

virtual void	Shutdown ()=0
	Signal all the workers to shutdown. More...

virtual void	InitCCL (String ccl, IntTuple device_ids)=0
	Initialize the data plane between workers. More...

virtual TVMRetValue	DebugGetFromRemote (int64_t reg_id, int worker_id)=0
	Get the value of a register from a remote worker. More...

virtual void	DebugSetRegister (int64_t reg_id, TVMArgValue value, int worker_id)=0
	Set the value of a register on a remote worker. More...

	TVM_DECLARE_BASE_OBJECT_INFO (SessionObj, Object)

template<typename... Args>
DRef	CallPacked (const DRef &func, Args &&... args)

Public Member Functions inherited from tvm::runtime::Object
uint32_t	type_index () const

std::string	GetTypeKey () const

size_t	GetTypeKeyHash () const

template<typename TargetType >
bool	IsInstance () const

bool	unique () const

	Object ()

	Object (const Object &other)

	Object (Object &&other)

Object &	operator= (const Object &other)

Object &	operator= (Object &&other)

Static Public Attributes
static constexpr const char *	_type_key = "runtime.disco.Session"

Static Public Attributes inherited from tvm::runtime::Object
static constexpr const char *	_type_key = "runtime.Object"

static constexpr bool	_type_final = false

static constexpr uint32_t	_type_child_slots = 0

static constexpr bool	_type_child_slots_can_overflow = true

static constexpr bool	_type_has_method_visit_attrs = true

static constexpr bool	_type_has_method_sequal_reduce = false

static constexpr bool	_type_has_method_shash_reduce = false

static constexpr uint32_t	_type_index = TypeIndex::kDynamic

Protected Member Functions
virtual void	DeallocReg (int reg_id)=0
	Deallocate a register id, kill it on all workers, and append it to `free_regs_`. More...

Protected Member Functions inherited from tvm::runtime::Object
void	IncRef ()
	developer function, increases reference counter. More...

void	DecRef ()
	developer function, decrease reference counter. More...

Friends
struct	SessionObj::FFI

class	DRefObj

Additional Inherited Members
Public Types inherited from tvm::runtime::Object
typedef void(*	FDeleter) (Object *self)
	Object deleter. More...

using	RefCounterType = std::atomic< int32_t >

Static Public Member Functions inherited from tvm::runtime::Object
static std::string	TypeIndex2Key (uint32_t tindex)
	Get the type key of the corresponding index from runtime. More...

static size_t	TypeIndex2KeyHash (uint32_t tindex)
	Get the type key hash of the corresponding index from runtime. More...

static uint32_t	TypeKey2Index (const std::string &key)
	Get the type index of the corresponding key from runtime. More...

static uint32_t	_GetOrAllocRuntimeTypeIndex ()

static uint32_t	RuntimeTypeIndex ()

Static Protected Member Functions inherited from tvm::runtime::Object
static uint32_t	GetOrAllocRuntimeTypeIndex (const std::string &key, uint32_t static_tindex, uint32_t parent_tindex, uint32_t type_child_slots, bool type_child_slots_can_overflow)
	Get the type index using type key. More...

Protected Attributes inherited from tvm::runtime::Object
uint32_t	type_index_ {0}
	Type index(tag) that indicates the type of the object. More...

RefCounterType	ref_counter_ {0}
	The internal reference counter. More...

FDeleter	deleter_ = nullptr
	deleter of this object to enable customized allocation. If the deleter is nullptr, no deletion will be performed. The creator of the object must always set the deleter field properly. More...

Detailed Description

A Disco interactive session. It allows users to interact with the Disco command queue with various PackedFunc calling convention.

Constructor & Destructor Documentation

◆ ~SessionObj()

virtual tvm::runtime::SessionObj::~SessionObj ( )

virtualdefault

Member Function Documentation

◆ CallPacked() [1/2]

template<typename... Args>

DRef TVM_ALWAYS_INLINE tvm::runtime::SessionObj::CallPacked	(	const DRef &	func,
		Args &&...	args
	)

Call a PackedFunc on workers providing variadic arguments.

Template Parameters

Args	In the variadic arguments, the supported types include: integers and floating point numbers; DataType; Device; std::string; DRef. Examples of unsupported types: NDArray, DLTensor; TVM Objects, including PackedFunc, Module and String;

Parameters

func	The function to be called.
args	The variadic arguments.

Returns: The return value of function call

◆ CallPacked() [2/2]

template<typename... Args>

DRef tvm::runtime::SessionObj::CallPacked	(	const DRef &	func,
		Args &&...	args
	)

◆ CallWithPacked()

virtual DRef tvm::runtime::SessionObj::CallWithPacked ( const TVMArgs & args )

pure virtual

Call packed function on each worker using a packed sequence. The calling convention: The first element must be DiscoAction::kCallPacked, The second element must be 0, which will later be updated by the session to return reg_id The thirtd element is the function to be called.

◆ CopyFromWorker0()

virtual void tvm::runtime::SessionObj::CopyFromWorker0	(	const NDArray &	host_array,
		const DRef &	remote_array
	)

pure virtual

Copy an NDArray from worker-0 to the controler-side NDArray.

Parameters

host_array	The array to be copied to worker-0
remote_array	The NDArray on worker-0

◆ CopyToWorker0()

virtual void tvm::runtime::SessionObj::CopyToWorker0	(	const NDArray &	host_array,
		const DRef &	remote_array
	)

pure virtual

Copy the controler-side NDArray to worker-0.

Parameters

host_array	The array to be copied to worker-0
remote_array	The NDArray on worker-0

◆ DeallocReg()

virtual void tvm::runtime::SessionObj::DeallocReg ( int reg_id )

protectedpure virtual

Deallocate a register id, kill it on all workers, and append it to free_regs_.

◆ DebugGetFromRemote()

virtual TVMRetValue tvm::runtime::SessionObj::DebugGetFromRemote	(	int64_t	reg_id,
		int	worker_id
	)

pure virtual

Get the value of a register from a remote worker.

Parameters

reg_id	The id of the register to be fetched.
worker_id	The id of the worker to be fetched from.

Returns: The value of the register.

◆ DebugSetRegister()

virtual void tvm::runtime::SessionObj::DebugSetRegister	(	int64_t	reg_id,
		TVMArgValue	value,
		int	worker_id
	)

pure virtual

Set the value of a register on a remote worker.

Parameters

reg_id	The id of the register to be set.
value	The value to be set.
worker_id	The id of the worker to be set.

◆ GetGlobalFunc()

virtual DRef tvm::runtime::SessionObj::GetGlobalFunc ( const std::string & name )

pure virtual

Get a global functions on workers.

◆ InitCCL()

virtual void tvm::runtime::SessionObj::InitCCL	(	String	ccl,
		IntTuple	device_ids
	)

pure virtual

Initialize the data plane between workers.

Parameters

ccl	The name of the communication backend, e.g., nccl, rccl, mpi.
device_ids	The device ids of the workers.

◆ Shutdown()

virtual void tvm::runtime::SessionObj::Shutdown ( )

pure virtual

Signal all the workers to shutdown.

◆ SyncWorker()

virtual void tvm::runtime::SessionObj::SyncWorker ( int worker_id )

pure virtual

Synchrnoize the controler with a worker, and it will wait until worker finishes executing this instruction.

Parameters

worker_id The id of the worker to be synced with.

Note: This function is usually used for worker-0, because it is the only worker that is assumed to collocate with the controler. Syncing with other workers may not be supported.

◆ TVM_DECLARE_BASE_OBJECT_INFO()

tvm::runtime::SessionObj::TVM_DECLARE_BASE_OBJECT_INFO	(	SessionObj	,
		Object
	)

Friends And Related Function Documentation

◆ DRefObj

friend class DRefObj

friend

◆ SessionObj::FFI

friend struct SessionObj::FFI

friend

Member Data Documentation

◆ _type_key

constexpr const char* tvm::runtime::SessionObj::_type_key = "runtime.disco.Session"

staticconstexpr

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

include/tvm/runtime/disco/session.h

Public Member Functions

Static Public Attributes

Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ~SessionObj()

Member Function Documentation

◆ CallPacked() [1/2]

◆ CallPacked() [2/2]

◆ CallWithPacked()

◆ CopyFromWorker0()

◆ CopyToWorker0()

◆ DeallocReg()

◆ DebugGetFromRemote()

◆ DebugSetRegister()

◆ GetGlobalFunc()

◆ InitCCL()

◆ Shutdown()

◆ SyncWorker()

◆ TVM_DECLARE_BASE_OBJECT_INFO()

Friends And Related Function Documentation

◆ DRefObj

◆ SessionObj::FFI

Member Data Documentation

◆ _type_key