170 		perror("mmap");  in child_thread()
176 			perror("mmap");  in child_thread()
271 		perror("setsockopt SO_RCVBUF");  in apply_rcvsnd_buf()
276 		perror("setsockopt SO_SNDBUF");  in apply_rcvsnd_buf()
320 		perror("setsockopt SO_RCVLOWAT");  in do_accept()
333 			perror("accept");  in do_accept()
340 			perror("pthread_create");  in do_accept()
444 			perror("socket");  in main()
455 			perror("setsockopt TCP_MAXSEG");  in main()
459 			perror("bind");  in main()
463 			perror("listen");  in main()
471 		perror("mmap");  in main()
477 		perror("socket");  in main()
486 		perror("setsockopt TCP_MAXSEG");  in main()
490 		perror("connect");  in main()
496 		perror("setsockopt SO_MAX_PACING_RATE");  in main()
500 		perror("setsockopt SO_ZEROCOPY, (-z option disabled)");  in main()