Mercurial > hg > nginx
annotate auto/lib/make @ 7583:efd71d49bde0
Events: available bytes calculation via ioctl(FIONREAD).
This makes it possible to avoid looping for a long time while working
with a fast enough peer when data are added to the socket buffer faster
than we are able to read and process them (ticket #1431). This is
basically what we already do on FreeBSD with kqueue, where information
about the number of bytes in the socket buffer is returned by
the kevent() call.
With other event methods rev->available is now set to -1 when the socket
is ready for reading. Later in ngx_recv() and ngx_recv_chain(), if
full buffer is received, real number of bytes in the socket buffer is
retrieved using ioctl(FIONREAD). Reading more than this number of bytes
ensures that even with edge-triggered event methods the event will be
triggered again, so it is safe to stop processing of the socket and
switch to other connections.
Using ioctl(FIONREAD) only after reading a full buffer is an optimization.
With this approach we only call ioctl(FIONREAD) when there are at least
two recv()/readv() calls.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 17 Oct 2019 16:02:19 +0300 |
parents | 9eefb38f0005 |
children |
rev | line source |
---|---|
444
42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents:
399
diff
changeset
|
1 |
42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents:
399
diff
changeset
|
2 # Copyright (C) Igor Sysoev |
4412 | 3 # Copyright (C) Nginx, Inc. |
444
42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents:
399
diff
changeset
|
4 |
286
fc8dc489247e
nginx-0.0.2-2004-03-12-00:34:52 import
Igor Sysoev <igor@sysoev.ru>
parents:
282
diff
changeset
|
5 |
320
d621239c30f7
nginx-0.0.3-2004-04-18-23:06:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
6 if [ $PCRE != NONE -a $PCRE != NO -a $PCRE != YES ]; then |
286
fc8dc489247e
nginx-0.0.2-2004-03-12-00:34:52 import
Igor Sysoev <igor@sysoev.ru>
parents:
282
diff
changeset
|
7 . auto/lib/pcre/make |
fc8dc489247e
nginx-0.0.2-2004-03-12-00:34:52 import
Igor Sysoev <igor@sysoev.ru>
parents:
282
diff
changeset
|
8 fi |
195
8dee38ea9117
nginx-0.0.1-2003-11-25-23:44:56 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
9 |
399
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
320
diff
changeset
|
10 if [ $OPENSSL != NONE -a $OPENSSL != NO -a $OPENSSL != YES ]; then |
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
320
diff
changeset
|
11 . auto/lib/openssl/make |
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
320
diff
changeset
|
12 fi |
4e21d1291a14
nginx-0.0.7-2004-07-25-22:34:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
320
diff
changeset
|
13 |
320
d621239c30f7
nginx-0.0.3-2004-04-18-23:06:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
297
diff
changeset
|
14 if [ $ZLIB != NONE -a $ZLIB != NO -a $ZLIB != YES ]; then |
282
30310107dbc9
nginx-0.0.2-2004-03-09-22:47:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
274
diff
changeset
|
15 . auto/lib/zlib/make |
30310107dbc9
nginx-0.0.2-2004-03-09-22:47:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
274
diff
changeset
|
16 fi |
599 | 17 |
3363 | 18 if [ $NGX_LIBATOMIC != NO -a $NGX_LIBATOMIC != YES ]; then |
19 . auto/lib/libatomic/make | |
20 fi | |
21 | |
6419 | 22 if [ $USE_PERL != NO ]; then |
599 | 23 . auto/lib/perl/make |
24 fi |