2011/11/28 Karol Golab <karol@tls.pl>

Well, I have a Perl script run as part of a dialplan and the script creates an EventConsumer. Thus I have one bind / unbind pair for each connection. Is this somehow wrong / against what the EventConsumer API was planned for?
How could I have a single bind/unbind in this case?

As for choosing event socket and C application vs a script - what is the main difference / reason to switch: performance of some other issues? My CPU seems to have some cycles to spare.

Regards,
Karol
On 11/28/2011 05:36 PM, Anthony Minessale wrote:
you're probably right but I wonder what you are doing that is binding and unbinding so much?
The bind and unbind was designed to be called once when the module is loaded and called again when it exits.

My fear is you are using the embedded scripting event handers in some quick repeating fashion.

I did a commit to flip that case around but I don't encourage you to use embedded scripts for heavy event traffic, that's what event socket is for and if you have the C skills to debug this, you might want to try a C app ;)

2011/11/28 Brian West <brian@freeswitch.org>

Please post it to jira.freeswitch.org

/b

On Nov 28, 2011, at 2:31 AM, Karol Golab wrote:

  Hi!

  I've noticed some strange code in src/switch_event.c - could someone
smarter (& knowing the mentioned code) please take a look?

  The problem is in the order of calls to locks BLOCK & RWLOCK - it
differs between functions:

switch_event_bind_removable
        switch_mutex_lock(BLOCK);
        switch_thread_rwlock_wrlock(RWLOCK);

switch_event_unbind_callback
    switch_thread_rwlock_wrlock(RWLOCK);
    switch_mutex_lock(BLOCK);

switch_event_unbind
    switch_thread_rwlock_wrlock(RWLOCK);
    switch_mutex_lock(BLOCK);

  As I understand this may lead to an outright deadlock between bind
and unbind.

  I stumbled upon this code while debugging what seems like deadlocks
in our test FS installation put under some heavy load. The load is about
25 new event subscribers per second (destroyed few seconds later) and
about 700 events per second.

  Regards,
  Karol

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