mina-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Emmanuel Lecharny (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DIRMINA-1095) Seems like the management f UDP sessions is really unneficient
Date Fri, 18 Jan 2019 21:32:00 GMT

    [ https://issues.apache.org/jira/browse/DIRMINA-1095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16746680#comment-16746680
] 

Emmanuel Lecharny commented on DIRMINA-1095:
--------------------------------------------

Jonathan,

sorry for the delayed response, way to many stuff on my plate those last weeks...

I think we should move to 2.1.x for this change. 2.0.x should probably be left for pure maintenance.

> Seems like the management f UDP sessions is really unneficient
> --------------------------------------------------------------
>
>                 Key: DIRMINA-1095
>                 URL: https://issues.apache.org/jira/browse/DIRMINA-1095
>             Project: MINA
>          Issue Type: Improvement
>    Affects Versions: 2.0.19
>            Reporter: Emmanuel Lecharny
>            Assignee: Jonathan Valliere
>            Priority: Major
>             Fix For: 2.0.20
>
>
> When we process incoming UDP messages, we iterate over the activated {{SelectionKey}}s.
That's ok, but for each one of them, we read the data and try to flush the scheduled messages.
The loop where it's done seems to iterate on *all* the managed sessions, for each keys we
are processing :
> {code:java}
>    private void processReadySessions(Set<SelectionKey> handles) {
>         Iterator<SelectionKey> iterator = handles.iterator();
>         while (iterator.hasNext()) {
>             SelectionKey key = iterator.next();
>             DatagramChannel handle = (DatagramChannel) key.channel();
>             iterator.remove();
>             try {
>                 if (key.isValid() && key.isReadable()) {
>                     readHandle(handle);
>                 }
>                 if (key.isValid() && key.isWritable()) {
>                     for (IoSession session : getManagedSessions().values()) {
>                         scheduleFlush((NioSession) session);
> ...
> {code}
> There is no reason to do so. First, we should not iterate on all the managed sessions
(we may have thousands), but only the sessions which have something to write, and we certainly
should not do that for every active key...



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Mime
View raw message