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class live_executor

Declaration

class live_executor : public executor { /* full declaration omitted */ };

Description

Executor implementation for a normal (non-dry) run of a Celerity application. Internal instruction dependencies are resolved by means of an out_of_order_engine and receive_arbiter, and the resulting operations dispatched to a backend and communicator implementation.

Declared at: include/live_executor.h:47

Inherits from: executor

Member Variables

std::unique_ptr<communicator> m_root_comm
double_buffered_queue< live_executor_detail::submission> m_submission_queue
std::unique_ptr<impl> m_impl
std::thread m_thread

Member Function Overview

Inherited from executor:

Member Functions

std::chrono::nanoseconds get_active_time() const

Description

Returns the total time the executor has spent processing instructions.

Declared at: include/live_executor.h:75

std::chrono::nanoseconds get_starvation_time()
    const

Description

Returns the total time the executor has spent idle waiting for instructions while the scheduler was busy.

Declared at: include/live_executor.h:73

explicit live_executor(
    std::unique_ptr<backend> backend,
    std::unique_ptr<communicator> root_comm,
    executor::delegate* dlg,
    const policy_set& policy =
        default_policy_set())

Description

Operations are dispatched to backend and root_comm or one of its clones. dlg (optional) receives notifications about reached horizons and epochs from the executor thread.

Declared at: include/live_executor.h:55

Parameters

std::unique_ptr<backend> backend
std::unique_ptr<communicator> root_comm
executor::delegate* dlg
const policy_set& policy = default_policy_set()

live_executor(const live_executor&)

Declared at: include/live_executor.h:58

Parameters

const live_executor& 

live_executor(live_executor&&)

Declared at: include/live_executor.h:59

Parameters

live_executor&& 

void notify_scheduler_idle(bool is_idle)

Description

Informs the executor about a change of the scheduler idle state. Required for tracking starvation time.

Declared at: include/live_executor.h:71

Parameters

bool is_idle

live_executor& operator=(const live_executor&)

Declared at: include/live_executor.h:60

Parameters

const live_executor& 

live_executor& operator=(live_executor&&)

Declared at: include/live_executor.h:61

Parameters

live_executor&& 

void submit(
    std::vector<const instruction*> instructions,
    std::vector<outbound_pilot> pilots)

Description

Submits a list of instructions to execute once their dependencies have been fulfilled, and a list of outbound pilots to be transmitted to their recipients as soon as possible. Instructions must be in topological order of dependencies, as must be the concatenation of all vectors passed to subsequent invocations of this function.

Declared at: include/live_executor.h:69

Parameters

std::vector<const instruction*> instructions
std::vector<outbound_pilot> pilots

void track_host_object_instance(
    host_object_id hoid,
    std::unique_ptr<host_object_instance>
        instance)

Description

Transfer ownership of a host object instance to the executor. The executor will later destroy this instance when executing a matching destroy_host_object_instruction.

Declared at: include/live_executor.h:66

Parameters

host_object_id hoid
std::unique_ptr<host_object_instance> instance

void track_reducer(
    reduction_id rid,
    std::unique_ptr<reducer> reducer)

Description

Informs the executor about the runtime behavior of a reduction. Will be used by any fill_identity_instruction and reduce_instruction later submitted on the same reduction_id. Reducer instances are removed from executor tracking and destroyed when they later appear in an instruction_garbage list attached to a horizon or epoch instruction.

Declared at: include/live_executor.h:67

Parameters

reduction_id rid
std::unique_ptr<reducer> reducer

void track_user_allocation(allocation_id aid,
                           void* ptr)

Description

Informs the executor about the runtime address of an allocation on user_memory_id. Must be called before submitting any instruction referring to the allocation id in question. User allocations are later removed from executor tracking as they appear in an instruction_garbage list attached to a horizon or epoch instruction.

Declared at: include/live_executor.h:65

Parameters

allocation_id aid
void* ptr

~live_executor()

Description

Waits until an epoch with epoch_action::shutdown has executed and the executor thread has exited.

Declared at: include/live_executor.h:63

static constexpr policy_set default_policy_set()

Description

Default-constructs a policy_set - this must be a function because we can't use the implicit default constructor of policy_set, which has member initializers, within its surrounding class (Clang diagnostic).

Declared at: include/live_executor.h:91

void thread_main()

Declared at: include/live_executor.h:87