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Searched refs:data_tail (Results 1 – 7 of 7) sorted by relevance

/tools/testing/selftests/powerpc/pmu/sampling_tests/
A Dmisc.c212 unsigned long data_head, data_tail; in __event_read_samples() local
225 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()
/tools/testing/selftests/bpf/benchs/
A Dbench_ringbufs.c483 __u64 data_head, data_tail; in perfbuf_custom_consumer() local
503 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()
/tools/include/linux/
A Dring_buffer.h71 smp_store_release(&base->data_tail, tail); in ring_buffer_write_tail()
/tools/perf/arch/x86/tests/
A Damd-ibs-period.c151 unsigned long data_tail, data_head; in rb_read() local
158 data_tail = rb->data_tail; in rb_read()
160 if ((data_head - data_tail) < size) in rb_read()
163 data_tail &= PERF_MMAP_DATA_MASK; in rb_read()
164 copy_sample_data(base, data_tail, dest, size); in rb_read()
165 rb->data_tail += size; in rb_read()
175 if ((rb->data_tail + size) > data_head) in rb_skip()
176 rb->data_tail = data_head; in rb_skip()
178 rb->data_tail += size; in rb_skip()
/tools/memory-model/Documentation/
A Drecipes.txt338 * if (LOAD ->data_tail) { LOAD ->data_head
342 * STORE ->data_head STORE ->data_tail
393 * if (LOAD ->data_tail) { LOAD ->data_head
397 * STORE ->data_head STORE ->data_tail
402 The kernel's control dependency between the load from ->data_tail
404 between the load from data and the store to ->data_tail prevents
/tools/include/uapi/linux/
A Dperf_event.h746 __u64 data_tail; /* user-space written tail */ member
/tools/lib/bpf/
A Dlibbpf.c13228 __u64 data_tail = header->data_tail;
13234 while (data_head != data_tail) {
13235 ehdr = base + (data_tail & (mmap_size - 1));
13260 data_tail += ehdr_size;
13265 ring_buffer_write_tail(header, data_tail);

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