29 volatile struct perf_event_mmap_page *header;  variable
47 	header = base;  in perf_event_mmap()
59 	struct perf_event_header header;  member
66 	__u64 data_tail = header->data_tail;  in perf_event_read()
67 	__u64 data_head = header->data_head;  in perf_event_read()
76 	base = ((char *)header) + page_size;  in perf_event_read()
85 		if (begin + e->header.size > base + buffer_size) {  in perf_event_read()
88 			assert(len < e->header.size);  in perf_event_read()
90 			memcpy(buf + len, base, e->header.size - len);  in perf_event_read()
92 			begin = base + e->header.size - len;  in perf_event_read()
93 		} else if (begin + e->header.size == base + buffer_size) {  in perf_event_read()
96 			begin += e->header.size;  in perf_event_read()
99 		if (e->header.type == PERF_RECORD_SAMPLE) {  in perf_event_read()
101 		} else if (e->header.type == PERF_RECORD_LOST) {  in perf_event_read()
103 				struct perf_event_header header;  in perf_event_read()  member
110 			       e->header.type, e->header.size);  in perf_event_read()
115 	header->data_tail = data_head;  in perf_event_read()