Lines Matching refs:data_tail
80 head pointer ``data_head`` and a tail pointer ``data_tail``. When the
93 |data_head|data_tail|...| | |***|***|***|***|***| | | |
411 |Event wait queue| |data_head|data_tail| |***|***| | |***|
450 updates the ``data_tail`` to indicate the data start position. Combining
456 the ``data_head`` while the user space cannot access the ``data_tail`` due
490 it don't need the ``data_tail``. In this mode, it will not generate the
526 tail pointer ``perf_event_mmap_page::data_tail``.
542 if (LOAD ->data_tail) { LOAD ->data_head
546 STORE ->data_head STORE ->data_tail
554 pointer ``perf_event_mmap_page::data_tail`` and filling sample into ring
558 writing the pointer ``data_tail``, perf tool first consumes samples and then