dump_channel_poll
dump_channel_poll(__func__, "rfd", c, p, &pfd[p]);
dump_channel_poll(__func__, "wfd", c, p, &pfd[p]);
dump_channel_poll(__func__, "efd", c, p, &pfd[p]);
dump_channel_poll(__func__, "sock", c, p, &pfd[p]);
dump_channel_poll(__func__, what, c, p, pfd);
dump_channel_poll(__func__, "rfd", c, p, pfd);
dump_channel_poll(__func__, "wfd", c, p, pfd);
dump_channel_poll(__func__, "efd", c, p, pfd);
dump_channel_poll(__func__, "sock", c, p, pfd);