Hi All,
Here is an update on the progress. Based on the comments and feedback we
received, we modified following items in the upcoming version of the patch
(will be version #6). We are in the process of testing. I will be on vacation
from Dec. 9th and will be back to office on Dec. 17th. We will hopefully be
able to send out version #6 of the patch on Dec. 18th.
1. setReusePort and getReusePort methods are removed from
Socket/ServerSocket/DatagramSocket.
2. Minor wording changes to StandardSocketOptions regarding to SO_REUSEPORT.
This include adding "usually" to the sentences and also including @since 9 at
the end.
3. inside sun.nio.ch.Net,
3.1 Change Net.reuseportSupported to Net.isReusePortAvailable and make it
as private.
3.2 The native implantation isReusePortAvailable0 is done inside Net.c
which points to a newly added native function named reuseport_available().
reuseport_available() is added in
./jdk/src/java.base/share/native/libnet/net_util.c.
4. inside java.net,
4.1 Add a function called isReusePortAvailable in
./jdk/src/java.base/share/classes/java/net/SocketImpl.java. Create SocketImpl.c
file for both UNIX and Windows to add the native implementation named as
isReusePortAvailable0.
4.2 The native implementation points to the same reuseport_available()
described in 3.2
5. Similarly, inside jdk.net, add isReusePortAvailable and its native
implementation.
6. Inside ./jdk/src/java.base/unix/native/libnet/net_util_md.c, add a new
function called reuseport_supported(). This is the function that calls
setsockopt and check for SO_REUSEPORT. reuseport_available() points to
reuseport_supported().
7. reuseport_supported() is called during JNI_OnLoad function and the result is
also the return value of reuseport_available(). This makes SO_REUSEPORT check
is done once at the beginning and the results will be cached for later use.
8. #3-#7 follows the example of the IPv6 check. Please let me know if there is
anything I missed.
9. Removed setting SO_REUSEPORT for debugger agent
10. For all the tests, instead of calling Net.reuseportSupport method, use
supportedOptions to check for SO_REUSEPORT.
11. Remove test/java/net/Socket/setReusePort/Basic.java since the setReusePort
and getReusePort methods are removed.
12. Setting SO_REUSEPORT value to platform dependent instead of using 15 for
everyone.
13. Make SO_REUSEPORT to be disabled by default for both
ServerSocketChannelImpl and SocketChannelImpl. Leave the feature enablement to
the users.
14. Updated the copyright date.
Thanks,
Lucy
-----Original Message-----
From: net-dev [mailto:[email protected]] On Behalf Of Lu, Yingqi
Sent: Tuesday, December 08, 2015 9:11 AM
To: Alan Bateman <[email protected]>; Michael McMahon
<[email protected]>; Volker Simonis <[email protected]>
Cc: Viswanathan, Sandhya <[email protected]>;
[email protected]; Kharbas, Kishor <[email protected]>; Aundhe,
Shirish <[email protected]>; Kaczmarek, Eric <[email protected]>
Subject: RE: Patch for adding SO_REUSEPORT socket option
Thank you very much for your help, Alan!
Thanks,
Lucy
-----Original Message-----
From: Alan Bateman [mailto:[email protected]]
Sent: Tuesday, December 08, 2015 8:46 AM
To: Lu, Yingqi <[email protected]>; Michael McMahon
<[email protected]>; Volker Simonis <[email protected]>
Cc: Kaczmarek, Eric <[email protected]>; [email protected];
Kharbas, Kishor <[email protected]>; Viswanathan, Sandhya
<[email protected]>; Aundhe, Shirish <[email protected]>
Subject: Re: Patch for adding SO_REUSEPORT socket option
On 08/12/2015 00:53, Lu, Yingqi wrote:
> Hi Alan,
>
> I heard that the feature freeze for OpenJDK9 is approaching. Given the
> significant performance impact (up to 1.93x with Hadoop Distributed File
> System) this feature provides and the status of the existing work, we would
> be really interested in see this feature to be approved for OpenJDK9. We will
> surely continue working with the community to address opens/issues until it
> is completely ready to be merged into the source code tree.
There is a proposal to move out JDK 9 by 6 months [1]. In any case, I think we
are close to agreement on this socket option and I will reply to your others
mail the implementation.
-Alan.
[1]
http://mail.openjdk.java.net/pipermail/jdk9-dev/2015-December/003149.html
