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-rw-r--r--lib/kernel/doc/src/inet.xml81
-rw-r--r--lib/kernel/src/gen_tcp.erl4
-rw-r--r--lib/kernel/src/inet.erl10
-rw-r--r--lib/kernel/src/inet_int.hrl2
-rw-r--r--lib/kernel/test/global_SUITE.erl2
5 files changed, 79 insertions, 20 deletions
diff --git a/lib/kernel/doc/src/inet.xml b/lib/kernel/doc/src/inet.xml
index c09aadbd74..a1590c2dce 100644
--- a/lib/kernel/doc/src/inet.xml
+++ b/lib/kernel/doc/src/inet.xml
@@ -556,13 +556,37 @@ fe80::204:acff:fe17:bf38
<c>[Byte1,Byte2|Binary]</c>.</p>
</item>
- <tag><c>{high_watermark, Size}</c></tag>
- <item> <p>
- Sender is forced busy if sent and enqueued data
- reaches the highwater mark.
- <br /> Default: 8192 kB.
- </p>
- </item>
+ <tag><c>{high_msgq_watermark, Size}</c> (TCP/IP sockets)</tag>
+ <item>
+ <p>The socket message queue will be set into a busy
+ state when the amount of data queued on the message
+ queue reaches this limit. Note that this limit only
+ concerns data that have not yet reached the ERTS internal
+ socket implementation. Default value used is 8 kB.</p>
+ <p>Senders of data to the socket will be suspended if
+ either the socket message queue is busy, or the socket
+ itself is busy.</p>
+ <p>For more information see the <c>low_msgq_watermark</c>,
+ <c>high_watermark</c>, and <c>low_watermark</c> options.</p>
+ <p>Note that distribution sockets will disable the use of
+ <c>high_msgq_watermark</c> and <c>low_msgq_watermark</c>,
+ and will instead use the
+ <seealso marker="erts:erlang#system_info_dist_buf_busy_limit">distribution
+ buffer busy limit</seealso> which is a similar feature.</p>
+ </item>
+
+ <tag><c>{high_watermark, Size}</c> (TCP/IP sockets)</tag>
+ <item>
+ <p>The socket will be set into a busy state when the amount
+ of data queued internally by the ERTS socket implementation
+ reaches this limit. Default value used is 8 kB.</p>
+ <p>Senders of data to the socket will be suspended if
+ either the socket message queue is busy, or the socket
+ itself is busy.</p>
+ <p>For more information see the <c>low_watermark</c>,
+ <c>high_msgq_watermark</c>, and <c>low_msqg_watermark</c>
+ options.</p>
+ </item>
<tag><c>{ipv6_v6only, Boolean}</c></tag>
<item>
@@ -647,14 +671,41 @@ fe80::204:acff:fe17:bf38
the flushing time-out in seconds.</p>
</item>
- <tag><c>{low_watermark, Size}</c></tag>
- <item> <p>
- If the port has reached its <c>high_watermark</c> it will
- force busy onto senders. When the port data queue reaches the
- <c>low_watermark</c> callers are no longer forced busy.
- <br /> Default: 4096 kB.
- </p>
- </item>
+ <tag><c>{low_msgq_watermark, Size}</c> (TCP/IP sockets)</tag>
+ <item>
+ <p>If the socket message queue is in a busy state, the
+ socket message queue will be set in a not busy state when
+ the amount of data queued in the message queue falls
+ below this limit. Note that this limit only concerns data
+ that have not yet reached the ERTS internal socket
+ implementation. Default value used is 4 kB.</p>
+ <p>Senders that have been suspended due to either a
+ busy message queue or a busy socket, will be resumed
+ when neither the socket message queue, nor the socket
+ are busy.</p>
+ <p>For more information see the <c>high_msgq_watermark</c>,
+ <c>high_watermark</c>, and <c>low_watermark</c> options.</p>
+ <p>Note that distribution sockets will disable the use of
+ <c>high_msgq_watermark</c> and <c>low_msgq_watermark</c>,
+ and will instead use the
+ <seealso marker="erts:erlang#system_info_dist_buf_busy_limit">distribution
+ buffer busy limit</seealso> which is a similar feature.</p>
+ </item>
+
+ <tag><c>{low_watermark, Size}</c> (TCP/IP sockets)</tag>
+ <item>
+ <p>If the socket is in a busy state, the socket will
+ be set in a not busy state when the amount of data
+ queued internally by the ERTS socket implementation
+ falls below this limit. Default value used is 4 kB.</p>
+ <p>Senders that have been suspended due to either a
+ busy message queue or a busy socket, will be resumed
+ when neither the socket message queue, nor the socket
+ are busy.</p>
+ <p>For more information see the <c>high_watermark</c>,
+ <c>high_msgq_watermark</c>, and <c>low_msgq_watermark</c>
+ options.</p>
+ </item>
<tag><c>{mode, Mode :: binary | list}</c></tag>
<item>
diff --git a/lib/kernel/src/gen_tcp.erl b/lib/kernel/src/gen_tcp.erl
index 22e6aa5bc8..ec13ab6d2e 100644
--- a/lib/kernel/src/gen_tcp.erl
+++ b/lib/kernel/src/gen_tcp.erl
@@ -37,9 +37,11 @@
{dontroute, boolean()} |
{exit_on_close, boolean()} |
{header, non_neg_integer()} |
+ {high_msgq_watermark, pos_integer()} |
{high_watermark, non_neg_integer()} |
{keepalive, boolean()} |
{linger, {boolean(), non_neg_integer()}} |
+ {low_msgq_watermark, pos_integer()} |
{low_watermark, non_neg_integer()} |
{mode, list | binary} | list | binary |
{nodelay, boolean()} |
@@ -67,9 +69,11 @@
dontroute |
exit_on_close |
header |
+ high_msgq_watermark |
high_watermark |
keepalive |
linger |
+ low_msgq_watermark |
low_watermark |
mode |
nodelay |
diff --git a/lib/kernel/src/inet.erl b/lib/kernel/src/inet.erl
index 719dd00720..9670271b2e 100644
--- a/lib/kernel/src/inet.erl
+++ b/lib/kernel/src/inet.erl
@@ -579,6 +579,7 @@ options() ->
buffer, header, active, packet, deliver, mode,
multicast_if, multicast_ttl, multicast_loop,
exit_on_close, high_watermark, low_watermark,
+ high_msgq_watermark, low_msgq_watermark,
send_timeout, send_timeout_close
].
@@ -596,8 +597,8 @@ stats() ->
connect_options() ->
[tos, priority, reuseaddr, keepalive, linger, sndbuf, recbuf, nodelay,
header, active, packet, packet_size, buffer, mode, deliver,
- exit_on_close, high_watermark, low_watermark, send_timeout,
- send_timeout_close, delay_send,raw].
+ exit_on_close, high_watermark, low_watermark, high_msgq_watermark,
+ low_msgq_watermark, send_timeout, send_timeout_close, delay_send, raw].
connect_options(Opts, Family) ->
BaseOpts =
@@ -652,8 +653,9 @@ con_add(Name, Val, R, Opts, AllOpts) ->
listen_options() ->
[tos, priority, reuseaddr, keepalive, linger, sndbuf, recbuf, nodelay,
header, active, packet, buffer, mode, deliver, backlog, ipv6_v6only,
- exit_on_close, high_watermark, low_watermark, send_timeout,
- send_timeout_close, delay_send, packet_size,raw].
+ exit_on_close, high_watermark, low_watermark, high_msgq_watermark,
+ low_msgq_watermark, send_timeout, send_timeout_close, delay_send,
+ packet_size, raw].
listen_options(Opts, Family) ->
BaseOpts =
diff --git a/lib/kernel/src/inet_int.hrl b/lib/kernel/src/inet_int.hrl
index 6d808b54cd..000119bc74 100644
--- a/lib/kernel/src/inet_int.hrl
+++ b/lib/kernel/src/inet_int.hrl
@@ -141,6 +141,8 @@
-define(INET_LOPT_READ_PACKETS, 33).
-define(INET_OPT_RAW, 34).
-define(INET_LOPT_TCP_SEND_TIMEOUT_CLOSE, 35).
+-define(INET_LOPT_TCP_MSGQ_HIWTRMRK, 36).
+-define(INET_LOPT_TCP_MSGQ_LOWTRMRK, 37).
% Specific SCTP options: separate range:
-define(SCTP_OPT_RTOINFO, 100).
-define(SCTP_OPT_ASSOCINFO, 101).
diff --git a/lib/kernel/test/global_SUITE.erl b/lib/kernel/test/global_SUITE.erl
index 1cc3eb7c79..b40c50f79f 100644
--- a/lib/kernel/test/global_SUITE.erl
+++ b/lib/kernel/test/global_SUITE.erl
@@ -3821,7 +3821,7 @@ start_node_rel(Name0, Rel, Config) ->
Name = node_name(Name0, Config),
{Release, Compat} = case Rel of
this ->
- {[this], "+R8"};
+ {[this], ""};
Rel when is_atom(Rel) ->
{[{release, atom_to_list(Rel)}], ""};
RelList ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 06:37:14 +0000