Commit c788efff authored by Steinar H. Gunderson's avatar Steinar H. Gunderson
Browse files

Read and process as many packets as possible in read_udp_packets, to avoid... 

Read and process as many packets as possible in read_udp_packets, to avoid having to run the entire event loop once per packet. (Patch from the Google tree.)
parent c1a475e7

ares/ares_process.c

+11 −7
Original line number Diff line number Diff line
@@ -399,13 +399,17 @@ static void read_udp_packets(ares_channel channel, fd_set *read_fds, 
         * extra system calls and confusion. */

        FD_CLR(server->udp_socket, read_fds);



      /* To reduce event loop overhead, read and process as many

       * packets as we can. */

      do {

        count = sread(server->udp_socket, buf, sizeof(buf));

        if (count == -1 && try_again(SOCKERRNO))

          continue;

        else if (count <= 0)

          handle_error(channel, i, now);



        else

          process_answer(channel, buf, (int)count, i, 0, now);

       } while (count > 0);

    }

}