10 struct sample {  struct
43 	struct sample *sample;  in test_ringbuf()  local
48 	sample = bpf_ringbuf_reserve(&ringbuf, sizeof(*sample), 0);  in test_ringbuf()
49 	if (!sample) {  in test_ringbuf()
54 	sample->pid = pid;  in test_ringbuf()
55 	bpf_get_current_comm(sample->comm, sizeof(sample->comm));  in test_ringbuf()
56 	sample->value = value;  in test_ringbuf()
58 	sample->seq = seq++;  in test_ringbuf()
61 	if (sample->seq & 1) {  in test_ringbuf()
62 		/* copy from reserved sample to a new one... */  in test_ringbuf()
63 		bpf_ringbuf_output(&ringbuf, sample, sizeof(*sample), flags);  in test_ringbuf()
64 		/* ...and then discard reserved sample */  in test_ringbuf()
65 		bpf_ringbuf_discard(sample, flags);  in test_ringbuf()
68 		bpf_ringbuf_submit(sample, flags);  in test_ringbuf()