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[FIXED B698] Performance Degredation During Game Play

 
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[FIXED B698] Performance Degredation During Game Play - 4/21/2015 10:50:05 PM   
stilesw


Posts: 1497
Joined: 6/26/2014
From: Hansville, WA, USA
Status: offline 		Hello to the CMANO technical wizards.

I am using CMANO version v1.071, build 678.3. I've been developing a modern version of the October 1962 Missile Crisis (still in initial stages) and have been stumped by a performance problem. After about 1.5 days of game time the game speed slows way down with intermittent stops and speed-ups. Thinking it might have to do with the number/type of units involved I've tried removing units, sides, missions, range circles and so forth with no appreciable difference. Vectors, Datablocks, Datalinks, Emmissions and Plotted Courses are all set for the selected unit.

My system specs are:
Windows 7 Professional 64Bit
Gigabyte B75M-D3H MOBO with 16GB RAM (Never seen more than about 60% used during game play)
Intel Core i7 3770K 3.50 gigahertz CPU
128 kilobyte primary memory cache
1024 kilobyte secondary memory cache
8192 kilobyte tertiary memory cache
Mufti-core (4 total)
Hyper-threaded (8 total)
NVIDIA GeForce GTX 750 Video Card (4GB on board RAM)
Samsung 500GB SSD (35% used)
16GB System Page File (System managed).

I've attached the scenario and screen shots of the game settings. Any suggestions as to how and keep the scenario from slowing way down (unplayable) after it has run for 1.5+ days? Should I have a faster system, more memory or am I missing some tweak to improve performance?

As always, thanks for any help you can provide.

Attachment (1)

< Message edited by Sunburn -- 4/27/2015 7:23:53 PM >
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RE: Performance Degredation During Game Play - 4/21/2015 10:57:24 PM   
mikmykWS

 

Posts: 11524
Joined: 3/22/2005
Status: offline 		Sorry for the slow down but thanks for the report and the files! We'll take a look

Mike

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RE: Performance Degredation During Game Play - 4/26/2015 9:24:17 AM   
Dimitris

 

Posts: 13282
Joined: 7/31/2005
Status: offline 		Hello,

Would it be possible to post a save from the point at which the performance degradation starts? I tried to replicate this without success here, so I suspect it may happen only under a specific set of conditions.

Thanks in advance!

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RE: Performance Degredation During Game Play - 4/26/2015 4:59:32 PM   
stilesw


Posts: 1497
Joined: 6/26/2014
From: Hansville, WA, USA
Status: offline 		Here you go. This is the point where the slowdown starts. It just keeps getting worse from this point on.

Attachment (1)

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RE: Performance Degredation During Game Play - 4/26/2015 5:09:37 PM   
thewood1

 

Posts: 6529
Joined: 11/27/2005
Status: offline 		I ran the original and just let it run at 1:15 time and it started crashing around 30 hours. I wasn't paying attention so missed the moment it crashed.

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Post #: 5
RE: Performance Degredation During Game Play - 4/26/2015 5:22:07 PM   
thewood1

 

Posts: 6529
Joined: 11/27/2005
Status: offline 		Here is a screen capture of the error message...no save.




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RE: Performance Degredation During Game Play - 4/26/2015 5:23:33 PM   
thewood1

 

Posts: 6529
Joined: 11/27/2005
Status: offline 		Something hinky is going on to get a memory message. Ic an run 2000+ unit scenarios with only mild slow downs. This one seems pretty tame.

It crashed after only running a couple hours game time form the save above.

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RE: Performance Degredation During Game Play - 4/26/2015 5:56:09 PM   
stilesw


Posts: 1497
Joined: 6/26/2014
From: Hansville, WA, USA
Status: offline 		I never received that (or any) error message. Once the game started to slow down I would continue it for several game hours until it got to slow to do anything with. Or, on occasion, the screen would dim and a "system is not responding" message would appear. Then I would just terminate it. As stated in my original post my system has 16GB of RAM and when CMANO runs this scenario I never saw "standby memory" in system monitor drop below about 9GB. I have tried this scenario with no other applications other than system processes running in the background - no email, browsers, anti-malware, explorer windows, etc. Didn't make any difference - after about 30 game hours the brakes go on.

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RE: Performance Degredation During Game Play - 4/26/2015 6:51:13 PM   
thewood1

 

Posts: 6529
Joined: 11/27/2005
Status: offline 		I get the out of memory message every time I have run to game time over 30-36 hours. They could very well be the same issue just manifesting itself differently.

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Post #: 9
RE: Performance Degredation During Game Play - 4/26/2015 10:01:14 PM   
Grondoval

 

Posts: 43
Joined: 11/2/2014
From: Niedersachsen, GER
Status: offline 		Good afternoon,

after testing the last save provided by stilesw, I can confirm a MASSIVE performance degradation on my system. It instantly gets so sluggish that normal gameplay is impossible. Scrolling around the map, zooming in or out literally takes at least a couple of seconds. I couldnt even quit the game, because it kind of hung up without error message.

Notably the pulse time was 2-10 ms, so very low all the time.


EDIT: after more testing I found out, that TIME COMPRESSION has something to do with it. I ran it for at least 15 minutes real time with no problems whats so ever. As soon as I activated TC once, after going back to real time it becomes unplayable really fast. Its as if the CPU trying to catch up on a huge backlog of calculations it couldnt do in time because of TC.


Specs:

Windows 8.1 Pro 64bit
Core i7 4770k 3,9 Ghz
8 GB DDR3 1600
Samsung 512gb SSD
GTX 970 GPU




Attachment (1)

< Message edited by Grondoval -- 4/26/2015 11:37:48 PM >

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RE: Performance Degredation During Game Play - 4/27/2015 6:21:48 PM   
Dimitris

 

Posts: 13282
Joined: 7/31/2005
Status: offline 		Okay, looked at this with the profiler at hand.

While I did not experience any noticeable slowdown or OOM exception (and on a rig much weaker than the OP's hotrod), the profiler clearly showed a massive CPU spike at the ship-pathfinding code.

So I ran the save in step-debug mode and discovered that at least one of the civilian ships (the 135.000-ton cruiseliner) was mercilessly hammering the navigator code with pathfinding requests. (Pathfinding is easily one of the most expensive areas of the code, both in CPU & RAM). This meant that the ship had real trouble following its plotted course.

Curious, I traced the manual-plotted course of the ship, and noticed that at least one of the waypoints was located in an location which should be inaccessible to the ship (too shallow, just 2m deep). I checked our related UI code and confirmed that we prohibit adding a new course leg to a non-accessible location......BUUUUUT.... we currently don't prohibit _moving_ an existing waypoint to such a location.

So what I presume happened is that you first plotted a rough course for the ship, and while subsequently manually refining it, you dragged the waypoint on the too-shallow location. Which led to the ship's navigator going completely bonkers. (The nav code has no concept of "we tried going through that point a thousand times, just let it go already!").

So, fixed this for the next version by adding an extra UI check that prevents dragging a waypoint to an inaccessible location.

This will not automatically solve the problem in your specific scenario. I would suggest re-plotting the courses for the civilian ships, this time paying attention to depths.

Thanks.

< Message edited by Sunburn -- 4/27/2015 7:23:26 PM >

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RE: Performance Degredation During Game Play - 4/27/2015 7:07:16 PM   
magi

 

Posts: 1529
Joined: 2/1/2014
Status: offline 		Very interesting.....

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RE: Performance Degredation During Game Play - 4/27/2015 9:29:44 PM   
stilesw


Posts: 1497
Joined: 6/26/2014
From: Hansville, WA, USA
Status: offline 		WELL DONE! I removed all the neutral shipping and ran the scenario at 30 min intervals (1800x) and it played through to the end with no slow down. I then modified the ship plots to avoid depths that were too shallow and again it worked fine. I also found another ship whose plot would also run aground. I'm sure that when the game tried to find routes for both ships at the same time it gave up and completely died.

Many thanks for the outstanding support. Not only is CMANO a superb simulation but the engineering support staff cannot be beat!

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Post #: 13
RE: Performance Degredation During Game Play - 4/27/2015 11:39:20 PM   
mikmykWS

 

Posts: 11524
Joined: 3/22/2005
Status: offline
quote:

ORIGINAL: Sunburn

Okay, looked at this with the profiler at hand.

While I did not experience any noticeable slowdown or OOM exception (and on a rig much weaker than the OP's hotrod), the profiler clearly showed a massive CPU spike at the ship-pathfinding code.

So I ran the save in step-debug mode and discovered that at least one of the civilian ships (the 135.000-ton cruiseliner) was mercilessly hammering the navigator code with pathfinding requests. (Pathfinding is easily one of the most expensive areas of the code, both in CPU & RAM). This meant that the ship had real trouble following its plotted course.

Curious, I traced the manual-plotted course of the ship, and noticed that at least one of the waypoints was located in an location which should be inaccessible to the ship (too shallow, just 2m deep). I checked our related UI code and confirmed that we prohibit adding a new course leg to a non-accessible location......BUUUUUT.... we currently don't prohibit _moving_ an existing waypoint to such a location.

So what I presume happened is that you first plotted a rough course for the ship, and while subsequently manually refining it, you dragged the waypoint on the too-shallow location. Which led to the ship's navigator going completely bonkers. (The nav code has no concept of "we tried going through that point a thousand times, just let it go already!").

So, fixed this for the next version by adding an extra UI check that prevents dragging a waypoint to an inaccessible location.

This will not automatically solve the problem in your specific scenario. I would suggest re-plotting the courses for the civilian ships, this time paying attention to depths.

Thanks.


After this winter we ought to rent that profiler to the MBTA(Boston Trains, Buses and Subways) profiler for a few. Just saying

Nice work D

< Message edited by mikmyk -- 4/28/2015 12:39:47 AM >

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