Commit Graph

19965 Commits (701e15760cc1bcb5d4cc03df8c4934a622620a55)

Author SHA1 Message Date
Diva Canto 52bb732692 Merge branch 'cpu-performance' of ssh://opensimulator.org/var/git/opensim into cpu-performance 2013-07-18 19:02:46 -07:00
Diva Canto dc88ffc5b4 Delay the enqueueing of non-longpoll requests for 100ms. No need to have these requests actively on the processing queue if it seems they're not ready. 2013-07-18 17:17:20 -07:00
Justin Clark-Casey (justincc) 07420a3b4d furhter shorten CheckAgentUpdateSignificance(). No real perf impact. 2013-07-19 01:00:38 +01:00
Justin Clark-Casey (justincc) 42e5856464 Remove some pointless code in CheckAgentUpdateSignificance() 2013-07-19 00:56:45 +01:00
Justin Clark-Casey (justincc) 3b8e7ff013 Make the check as to whether any particular inbound AgentUpdate packet is significant much earlier in UDP processing (i.e. before we pointlessly place such packets on internal queues, etc.)
Appears to have some impact on cpu but needs testing.
2013-07-19 00:51:13 +01:00
Justin Clark-Casey (justincc) 5c74f3ec9c Add measure of number of inbound AgentUpdates that were seen as significant to "show client stats" (i.e. sent on for further processing instead of being discarded)
Added here since it was the most convenient place
Number is in the last column, "Sig. AgentUpdates" along with percentage of all AgentUpdates
Percentage largely falls over time, most cpu for processing AgentUpdates may be in UDP processing as turning this off even earlier (with "debug lludp toggle agentupdate" results in a big cpu fall
Also tidies up display.
2013-07-19 00:16:09 +01:00
Diva Canto d1e9beead8 Revert "Now trying DoubleQueue instead of BlockingQueue for the PollServiceRequestManager."
This reverts commit 5f95f4d78e.
2013-07-18 15:52:07 -07:00
Justin Clark-Casey (justincc) 35aa6c86fe Hack in console command "debug lludp toggle agentupdate" to allow AgentUpdate in packets to be discarded at a very early stage.
Enabling this will stop anybody from moving on a sim, though all other updates should be unaffected.
Appears to make some cpu difference on very basic testing with a static standing avatar (though not all that much).
Need to see the results with much higher av numbers.
2013-07-18 23:05:45 +01:00
Justin Clark-Casey (justincc) 5cdc21aac7 minor: provide user feedback in the log for now when udp in/out bound threads are started/stopped 2013-07-18 22:54:10 +01:00
Justin Clark-Casey (justincc) cbb47f8489 Merge branch 'cpu-performance' of ssh://opensimulator.org/var/git/opensim into cpu-performance 2013-07-18 22:43:15 +01:00
Justin Clark-Casey (justincc) b2b29b7ec0 Fix up a temporary debugging change from last commit which stopped "lludp stop out" from actually doing anything 2013-07-18 22:42:25 +01:00
Diva Canto 27377194cd Changed the timoeut of EQ 502s (no events) to 50 secs. The viewer post requests timeout in 60 secs.
There's plenty of room for improvement in handling the EQs. Some other time...
2013-07-18 13:48:56 -07:00
Justin Clark-Casey (justincc) 8c6761c152 Do some simple queue empty checks in the main outgoing udp loop instead of always performing these on a separate fired thread.
This appears to improve cpu usage since launching a new thread is more expensive than performing a small amount of inline logic.
However, needs testing at scale.
2013-07-18 21:28:36 +01:00
Diva Canto 553d9cc5d2 Applying the same fix here that dan lake applied to master -- unfortunately I can't cherry-pick because that commit has 2 parents... 2013-07-18 07:52:14 -07:00
Diva Canto c685cc1799 Revert "This is a completely unreasonable thing to do, effectively defying the purpose of BlockingQueues. Trying this, to see the effect on CPU."
This reverts commit 5232ab0496.
2013-07-17 20:42:38 -07:00
Justin Clark-Casey (justincc) 1ba5a05cf7 try Hacking in an AutoResetEvent to control the outgoing UDP loop instead of a continuous loop with sleeps.
Does appear to have a cpu impact but may need further tweaking
2013-07-18 01:17:46 +01:00
Justin Clark-Casey (justincc) 0af3b5ed9a Revert "Put in temporary hack for performnace 'queue-empty' logic on a persistent thread rather than through fire and forget"
This reverts commit b402220dbb.

Eliminating fire and forget here does not appear to make a significant difference.
2013-07-18 00:51:10 +01:00
Justin Clark-Casey (justincc) a94a43d249 Revert "Properly remove the hack queue update thread when the voewr shuts down"
This reverts commit 7c544c0d4e.
2013-07-18 00:50:16 +01:00
Justin Clark-Casey (justincc) 7c544c0d4e Properly remove the hack queue update thread when the voewr shuts down
No functional change.
2013-07-18 00:39:28 +01:00
Justin Clark-Casey (justincc) b402220dbb Put in temporary hack for performnace 'queue-empty' logic on a persistent thread rather than through fire and forget
May not scale since this gives each client its own thread.
2013-07-18 00:30:22 +01:00
Diva Canto 5232ab0496 This is a completely unreasonable thing to do, effectively defying the purpose of BlockingQueues. Trying this, to see the effect on CPU. 2013-07-17 14:36:55 -07:00
Diva Canto 5f95f4d78e Now trying DoubleQueue instead of BlockingQueue for the PollServiceRequestManager. 2013-07-17 14:09:04 -07:00
Diva Canto 1d3deda10c I confuse myself. Let's try this variable name instead. 2013-07-17 13:26:15 -07:00
Diva Canto af792bc7f2 Do the same trick that dahlia did for Dequeue(timeout) 2013-07-17 13:23:29 -07:00
Diva Canto f4317dc26d Putting the requests back in the queue while testing for count >0 is not the smartest move... 2013-07-17 12:57:34 -07:00
Diva Canto 0f5b616fb0 Didn't mean to commit this change in BlockingQueue.cs 2013-07-17 12:02:00 -07:00
Diva Canto 2b8de2c404 Merge branch 'master' of ssh://opensimulator.org/var/git/opensim 2013-07-17 11:19:56 -07:00
Diva Canto e46459ef21 Cleared up much confusion in PollServiceRequestManager. Here's the history:
When Melanie added the web fetch inventory throttle to core, she made the long poll requests (EQs) effectively be handled on an active loop. All those requests, if they existed, were being constantly dequeued, checked for events (which most often they didn't have), and requeued again. This was an active loop thread on a 100ms cycle!
This fixes the issue. Now the inventory requests, if they aren't ready to be served, are placed directly back in the queue, but the long poll requests aren't placed there until there are events ready to be sent or timeout has been reached.
This puts the LongPollServiceWatcherThread back to 1sec cycle, as it was before.
2013-07-17 11:19:36 -07:00
Robert Adams 2c8bf4aaa6 BulletSim: fix small bug where everything looked like it was colliding
before the first simulator step.
2013-07-17 10:19:44 -07:00
Diva Canto 894554faf6 Removed the MapItems thread. Redirected the map items requests to the services throttle thread. Didn't change anything in how that processor is implemented, for better or for worse. 2013-07-16 20:28:48 -07:00
Diva Canto 9432f3c94d Improvements to the ServiceThrottleModule: added a category and an itemid to the interface, so that duplicate requests aren't enqueued more than once. 2013-07-16 19:04:30 -07:00
Diva Canto 5f27aaa6dd UserManagementModule: in the continuation, call the method that also looks up the cache, because the resource may be here in the meantime 2013-07-16 18:22:42 -07:00
Diva Canto 8bad56cb46 Merge branch 'master' of ssh://opensimulator.org/var/git/opensim 2013-07-16 17:53:49 -07:00
Diva Canto d4720bd721 Added config var to fiddle with the Interval for the service throttle thread 2013-07-16 17:53:05 -07:00
Dan Lake 9f129938c9 Attachments module only registers when enabled. This enables alternative attachments module implementations. All calls to Scene.AttachmentsModule are checking for null. Ideally, if we support disabling attachments then we need a null attachments module to register with the scene. 2013-07-16 17:43:36 -07:00
Diva Canto 9f578cf0c8 Deleted a couple of verbose messages 2013-07-16 17:18:11 -07:00
Diva Canto 0419852598 Merge branch 'master' of ssh://opensimulator.org/var/git/opensim 2013-07-16 17:15:08 -07:00
Diva Canto a006caabbc Added IServiceThrottleModule.cs 2013-07-16 17:06:54 -07:00
Diva Canto 99a600753e Changed the name to ServiceThrottle/ServiceThrottleModule in order to reflect its more generic nature. 2013-07-16 17:06:17 -07:00
Diva Canto 3fbd2c54bc Eliminated the UserManagement/UserManagementModule throttle thread. Made the other one generic, taking any continuation. 2013-07-16 17:04:32 -07:00
Justin Clark-Casey (justincc) cbc3576ee2 minor: Add warning method doc about possibly inconsistent results returned from BlockingQueue.Contains(), Count() and GetQueueArray() 2013-07-16 23:14:53 +01:00
Justin Clark-Casey (justincc) 50b8ab60f2 Revert "Revert "MSDN documentation is unclear about whether exiting a lock() block will trigger a Monitor.Wait() to exit, so avoid some locks that don't actually affect the state of the internal queues in the BlockingQueue class.""
This reverts commit 21a09ad3ad.

After more analysis and discussion, it is apparant that the Count(), Contains() and GetQueueArray() cannot be made thread-safe anyway without external locking
And this change appears to have a positive impact on performance.
I still believe that Monitor.Exit() will not release any thread for Monitor.Wait(), as per http://msdn.microsoft.com/en-gb/library/vstudio/system.threading.monitor.exit%28v=vs.100%29.aspx
so this should in theory make no difference, though mono implementation issues could possibly be coming into play.
2013-07-16 23:00:07 +01:00
Justin Clark-Casey (justincc) 21a09ad3ad Revert "MSDN documentation is unclear about whether exiting a lock() block will trigger a Monitor.Wait() to exit, so avoid some locks that don't actually affect the state of the internal queues in the BlockingQueue class."
This reverts commit 42e2a0d66e

Reverting because unfortunately this introduces race conditions because Contains(), Count() and GetQueueArray() may now end up returning the wrong result if another thread performs a simultaneous update on m_queue.
Code such as PollServiceRequestManager.Stop() relies on the count being correct otherwise a request may be lost.
Also, though some of the internal queue methods do not affect state, they are not thread-safe and could return the wrong result generating the same problem
lock() generates Monitor.Enter() and Monitor.Exit() under the covers.  Monitor.Exit() does not cause Monitor.Wait() to exist, only Pulse() and PulseAll() will do this
Reverted with agreement.
2013-07-16 22:03:49 +01:00
Diva Canto e0f0b88dec In the pursuit of using less CPU: now trying to avoid blocking queues altogether. Instead, this uses a timer. No sure if it's better or worse, but worth the try. 2013-07-16 13:01:39 -07:00
Diva Canto 6da50d34df Actually use DoubleQueue in UserManagement/UserManagementModule 2013-07-16 07:19:13 -07:00
Diva Canto 5a01ffa515 High CPU hunt: try a different blocking queue, DoubleQueue 2013-07-16 07:15:14 -07:00
dahlia 6dd454240f revert last commit which seems to conflict with DoubleQueue internals. The random crash might be in DoubleQueue instead. See http://pastebin.com/XhNBNqsc 2013-07-16 02:03:01 -07:00
dahlia 70aa77f520 add locking to internal queue in WebFetchInvDescModule; lack of which caused a random crash in a load test yesterday 2013-07-16 01:31:09 -07:00
dahlia 42e2a0d66e MSDN documentation is unclear about whether exiting a lock() block will trigger a Monitor.Wait() to exit, so avoid some locks that don't actually affect the state of the internal queues in the BlockingQueue class. 2013-07-16 01:12:56 -07:00
Justin Clark-Casey (justincc) e8e073aa97 Simplify EventQueue cap setup so that it is also stat monitored.
Curiously, the number of requests received is always one greater than that shown as handled - needs investigation
2013-07-16 00:05:45 +01:00