Relation API
Relation API binds two named instances, for example, tasks, with a reasonable relation attribute. Relations can be added before or after the actual instances are created and persist independently of the instances.
To logically group a bunch of tasks, you can use different types of relations:
void ITTAPI __itt_relation_add(const __itt_domain *domain, __itt_id head, __itt_relation relation, __itt_id tail)
void ITTAPI __itt_relation_add_ex(const __itt_domain *domain, __itt_clock_domain* clock_domain, unsigned long long timestamp, __itt_id head, __itt_relation relation, __itt_id tail)
Parameters of the primitives:
Type
| Parameter
| Description
|
|---|---|---|
[in] | __itt_domain* domain | Relation domain
|
[in] | __itt_relation relation | User-defined logical relation between two named instances
|
[in] | __itt_id head | Metadata name
|
[in] | __itt_id tail | IDs of two named related instances
size_t count
|
[in] | __itt_clock_domain* clock_domain | User-defined clock domain
|
[in] | unsigned long long timestamp | User-defined timestamp for the corresponding clock domain
|