54 	int fd, efd, err, id;  in load_and_attach()  local
121 	efd = open(buf, O_RDONLY, 0);  in load_and_attach()
122 	if (efd < 0) {  in load_and_attach()
127 	err = read(efd, buf, sizeof(buf));  in load_and_attach()
133 	close(efd);  in load_and_attach()
139 	efd = perf_event_open(&attr, -1/*pid*/, 0/*cpu*/, -1/*group_fd*/, 0);  in load_and_attach()
140 	if (efd < 0) {  in load_and_attach()
141 		printf("event %d fd %d err %s\n", id, efd, strerror(errno));  in load_and_attach()
144 	event_fd[prog_cnt - 1] = efd;  in load_and_attach()
145 	ioctl(efd, PERF_EVENT_IOC_ENABLE, 0);  in load_and_attach()
146 	ioctl(efd, PERF_EVENT_IOC_SET_BPF, fd);  in load_and_attach()