thr_job_queue_head Struct Reference

Public Member Functions
Uint32	used () const

Public Attributes
unsigned	m_read_index
unsigned	m_write_index

Detailed Description

thr_job_queue is shared between consumer / producer.

The hot-spot of the thr_job_queue are the read/write indexes. As they are updated and read frequently they have been placed in its own thr_job_queue_head[] in order to make them fit inside a single/few cache lines and thereby avoid complete L1-cache replacement every time the job_queue is scanned.

Definition at line 626 of file mt.cpp.

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

• storage/ndb/src/kernel/vm/mt.cpp