Visible to Intel only — GUID: GUID-6F52DF06-FFF4-4653-9F3B-16452E37F9AF
Package Contents
Parallelizing Simple Loops
Parallelizing Complex Loops
Parallelizing Data Flow and Dependence Graphs
Work Isolation
Exceptions and Cancellation
Containers
Mutual Exclusion
Timing
Memory Allocation
The Task Scheduler
Design Patterns
Migrating from Threading Building Blocks (TBB)
Constrained APIs
Appendix A Costs of Time Slicing
Appendix B Mixing With Other Threading Packages
References
oneapi::tbb::info namespace
parallel_for_each Body semantics and requirements
parallel_sort ranges interface extension
Type-specified message keys for join_node
Scalable Memory Pools
Helper Functions for Expressing Graphs
concurrent_lru_cache
task_arena::constraints extensions
Description
API
oneapi::tbb::info namespace extensions
task_group extensions
The customizing mutex type for concurrent_hash_map
Visible to Intel only — GUID: GUID-6F52DF06-FFF4-4653-9F3B-16452E37F9AF
task_arena::constraints extensions
NOTE:
To enable this feature, set the TBB_PREVIEW_TASK_ARENA_CONSTRAINTS_EXTENSION macro to 1.
Description
These extensions allow to customize tbb::task_arena::constraints with the following properties:
On machines with Intel® Hybrid Technology set the preferred core type for threads working within the task arena.
Limit the maximum number of threads that can be scheduled to one core simultaneously.
API
Header
#include <oneapi/tbb/task_arena.h>
Synopsis
namespace oneapi {
namespace tbb {
class task_arena {
public:
struct constraints {
constraints& set_numa_id(numa_node_id id);
constraints& set_max_concurrency(int maximal_concurrency);
constraints& set_core_type(core_type_id id);
constraints& set_max_threads_per_core(int threads_number);
numa_node_id numa_id = task_arena::automatic;
int max_concurrency = task_arena::automatic;
core_type_id core_type = task_arena::automatic;
int max_threads_per_core = task_arena::automatic;
}; // struct constraints
}; // class task_arena
} // namespace tbb
} // namespace oneapi
Member Functions
constraints&set_numa_id(numa_node_idid)
Sets the numa_id field to the id.
Returns: Reference to *this.
constraints&set_max_concurrency(intmaximal_concurrency)
Sets the max_concurrency field to the maximal_concurrency.
Returns: Reference to *this.
constraints&set_core_type(core_type_idid)
Sets the core_type field to the id.
Returns: Reference to *this.
constraints&set_max_threads_per_core(intthreads_number)
Sets the max_threads_per_core field to the threads_number.
Returns: Reference to *this.
Member Objects
numa_node_idnuma_id
An integral logical index uniquely identifying a NUMA node. All threads joining the task_arena are bound to this NUMA node.
NOTE:
To obtain a valid NUMA node ID, call oneapi::tbb::info::numa_nodes().
intmax_concurrency
The maximum number of threads that can participate in work processing within the task_arena at the same time.
core_type_idcore_type
An integral logical index uniquely identifying a core type. All threads joining the task_arena are bound to this core type.
NOTE:
To obtain a valid core type node ID, call oneapi::tbb::info::core_types().
intmax_threads_per_core
The maximum number of threads that can be scheduled to one core simultaneously.
See also: