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Searched refs:data_head (Results 1 – 13 of 13) sorted by relevance

/linux/tools/testing/selftests/powerpc/pmu/sampling_tests/
A Dmisc.c205 unsigned long data_head, data_tail; in __event_read_samples() local
215 data_head = metadata_page->data_head; in __event_read_samples()
232 if (data_head - data_tail < sizeof(header)) in __event_read_samples()
244 if ((metadata_page->data_tail + *size) > metadata_page->data_head) in __event_read_samples()
245 data_tail = metadata_page->data_head; in __event_read_samples()
/linux/tools/include/linux/
A Dring_buffer.h59 return smp_load_acquire(&base->data_head); in ring_buffer_read_head()
61 u64 head = READ_ONCE(base->data_head); in ring_buffer_read_head()
/linux/drivers/staging/vt6656/
A Drxtx.h95 struct vnt_tx_datahead_g data_head; member
103 struct vnt_tx_datahead_ab data_head; member
113 struct vnt_tx_datahead_g data_head; member
A Drxtx.c249 vnt_rxtx_datahead_g(tx_context, &buf->data_head); in vnt_rxtx_rts_g_head()
265 vnt_rxtx_datahead_ab(tx_context, &buf->data_head); in vnt_rxtx_rts_ab_head()
287 vnt_rxtx_datahead_g(tx_context, &buf->data_head); in vnt_fill_cts_head()
/linux/tools/testing/selftests/bpf/benchs/
A Dbench_ringbufs.c483 __u64 data_head, data_tail; in perfbuf_custom_consumer() local
502 data_head = ring_buffer_read_head(header); in perfbuf_custom_consumer()
504 while (data_head != data_tail) { in perfbuf_custom_consumer()
/linux/Documentation/userspace-api/
A Dperf_ring_buffer.rst80 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| |***|***| | |***|
451 with the head pointer ``data_head``, which works as the end position of
456 the ``data_head`` while the user space cannot access the ``data_tail`` due
488 the ``data_head`` keeps the position of current data, the perf always
542 if (LOAD ->data_tail) { LOAD ->data_head
546 STORE ->data_head STORE ->data_tail
/linux/tools/memory-model/Documentation/
A Drecipes.txt334 * if (LOAD ->data_tail) { LOAD ->data_head
338 * STORE ->data_head STORE ->data_tail
389 * if (LOAD ->data_tail) { LOAD ->data_head
393 * STORE ->data_head STORE ->data_tail
/linux/tools/include/uapi/linux/
A Dperf_event.h724 __u64 data_head; /* head in the data section */ member
/linux/include/uapi/linux/
A Dperf_event.h724 __u64 data_head; /* head in the data section */ member
/linux/kernel/events/
A Dring_buffer.c114 WRITE_ONCE(rb->user_page->data_head, head); in perf_output_put_handle()
A Dcore.c14105 BUILD_BUG_ON((offsetof(struct perf_event_mmap_page, data_head)) in perf_event_init()
/linux/tools/perf/
A Ddesign.txt332 __u32 data_head; /* head in the data section */
/linux/tools/lib/bpf/
A Dlibbpf.c13025 __u64 data_head = ring_buffer_read_head(header);
13032 while (data_head != data_tail) {

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