include/uapi/linux/perf_event.h

750

__u64 data_tail; /* user-space written tail */

kernel/events/ring_buffer.c

202

tail = READ_ONCE(rb->user_page->data_tail);

tools/include/linux/ring_buffer.h

71

smp_store_release(&base->data_tail, tail);

tools/include/uapi/linux/perf_event.h

750

__u64 data_tail; /* user-space written tail */

tools/lib/bpf/libbpf.c

13577

__u64 data_tail = header->data_tail;

tools/lib/bpf/libbpf.c

13583

while (data_head != data_tail) {

tools/lib/bpf/libbpf.c

13609

data_tail += ehdr_size;

tools/perf/arch/x86/tests/amd-ibs-period.c

151

unsigned long data_tail, data_head;

tools/perf/arch/x86/tests/amd-ibs-period.c

158

data_tail = rb->data_tail;

tools/perf/arch/x86/tests/amd-ibs-period.c

160

if ((data_head - data_tail) < size)

tools/perf/arch/x86/tests/amd-ibs-period.c

163

data_tail &= PERF_MMAP_DATA_MASK;

tools/perf/arch/x86/tests/amd-ibs-period.c

164

copy_sample_data(base, data_tail, dest, size);

tools/perf/arch/x86/tests/amd-ibs-period.c

165

rb->data_tail += size;

tools/perf/arch/x86/tests/amd-ibs-period.c

175

if ((rb->data_tail + size) > data_head)

tools/perf/arch/x86/tests/amd-ibs-period.c

176

rb->data_tail = data_head;

tools/perf/arch/x86/tests/amd-ibs-period.c

178

rb->data_tail += size;

tools/testing/selftests/bpf/benchs/bench_ringbufs.c

536

__u64 data_head, data_tail;

tools/testing/selftests/bpf/benchs/bench_ringbufs.c

556

data_tail = header->data_tail;

tools/testing/selftests/bpf/benchs/bench_ringbufs.c

557

while (data_head != data_tail) {

tools/testing/selftests/bpf/benchs/bench_ringbufs.c

558

ehdr = base + (data_tail & mmap_mask);

tools/testing/selftests/bpf/benchs/bench_ringbufs.c

564

data_tail += ehdr_size;

tools/testing/selftests/bpf/benchs/bench_ringbufs.c

566

ring_buffer_write_tail(header, data_tail);

tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c

212

unsigned long data_head, data_tail;

tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c

225

data_tail = metadata_page->data_tail;

tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c

239

if (data_head - data_tail < sizeof(header))

tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c

242

data_tail += sizeof(header);

tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c

246

return sample_buff + page_size + data_tail;

tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c

247

data_tail += *size;

tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c

251

if ((metadata_page->data_tail + *size) > metadata_page->data_head)

tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c

252

data_tail = metadata_page->data_head;

tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c

254

data_tail += *size;