Searched refs:data_tail (Results 1 – 9 of 9) sorted by relevance
212 unsigned long data_head, data_tail; in __event_read_samples() local225 data_tail = metadata_page->data_tail; in __event_read_samples()239 if (data_head - data_tail < sizeof(header)) in __event_read_samples()242 data_tail += sizeof(header); in __event_read_samples()246 return sample_buff + page_size + data_tail; in __event_read_samples()247 data_tail += *size; in __event_read_samples()251 if ((metadata_page->data_tail + *size) > metadata_page->data_head) in __event_read_samples()252 data_tail = metadata_page->data_head; in __event_read_samples()254 data_tail += *size; in __event_read_samples()
483 __u64 data_head, data_tail; in perfbuf_custom_consumer() local503 data_tail = header->data_tail; in perfbuf_custom_consumer()504 while (data_head != data_tail) { in perfbuf_custom_consumer()505 ehdr = base + (data_tail & mmap_mask); in perfbuf_custom_consumer()511 data_tail += ehdr_size; in perfbuf_custom_consumer()513 ring_buffer_write_tail(header, data_tail); in perfbuf_custom_consumer()
71 smp_store_release(&base->data_tail, tail); in ring_buffer_write_tail()
80 head pointer ``data_head`` and a tail pointer ``data_tail``. When the93 |data_head|data_tail|...| | |***|***|***|***|***| | | |411 |Event wait queue| |data_head|data_tail| |***|***| | |***|450 updates the ``data_tail`` to indicate the data start position. Combining456 the ``data_head`` while the user space cannot access the ``data_tail`` due490 it don't need the ``data_tail``. In this mode, it will not generate the526 tail pointer ``perf_event_mmap_page::data_tail``.542 if (LOAD ->data_tail) { LOAD ->data_head546 STORE ->data_head STORE ->data_tail554 pointer ``perf_event_mmap_page::data_tail`` and filling sample into ring[all …]
334 * if (LOAD ->data_tail) { LOAD ->data_head338 * STORE ->data_head STORE ->data_tail389 * if (LOAD ->data_tail) { LOAD ->data_head393 * STORE ->data_head STORE ->data_tail398 The kernel's control dependency between the load from ->data_tail400 between the load from data and the store to ->data_tail prevents
736 __u64 data_tail; /* user-space written tail */ member
202 tail = READ_ONCE(rb->user_page->data_tail); in __perf_output_begin()
13178 __u64 data_tail = header->data_tail; in perf_event_read_simple() local13184 while (data_head != data_tail) { in perf_event_read_simple()13185 ehdr = base + (data_tail & (mmap_size - 1)); in perf_event_read_simple()13210 data_tail += ehdr_size; in perf_event_read_simple()13215 ring_buffer_write_tail(header, data_tail); in perf_event_read_simple()