diff options
Diffstat (limited to 'ares')
| -rw-r--r-- | ares/ares_process.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/ares/ares_process.c b/ares/ares_process.c index f3ead0a22..9e03e4034 100644 --- a/ares/ares_process.c +++ b/ares/ares_process.c @@ -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); - count = sread(server->udp_socket, buf, sizeof(buf)); - if (count == -1 && try_again(SOCKERRNO)) - continue; - else if (count <= 0) - handle_error(channel, i, now); - - process_answer(channel, buf, (int)count, i, 0, now); + /* 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); } } |