Poor performance with the latest version?

[DrDeath_MD]

First off, amazing updates recently. The more planes and escorts makes missions come alive. I've been in more fur balls and surprise bounced in the most recent versions.

However, I'm getting fairly "choppy" performance. in missions. I have the medium CPU setting selected and when I check my CPU/GPU utilization the CPU is used at about 30-40% (8700k stock speeds) and the GPU about 55% (1080ti at 1440p). 

I can feel the game slow down but the FPS counter (both internal and RTSS) shows I'm getting 90 yet the sim and track IR seem to be running more around 45.  The FPS are not affected by dropping setting down or using V-sync.

Is this normal performance of the game engine with this many planes, ground vehicles, etc. running? 

[[808_BOB]_RlCK]

The more planes in the air the more processing the simulator needs to do. I have a 8700k and a 1070 and I can run missions that have mostly 10 - 15 planes in the air at the same time. That's why your simulator is choppy. It's honestly a problem with how IL-2 AI work right now. The AI is quite complex and too many AI planes can cause some serious slowdown.

[DrDeath_MD]

It just seems odd that my processor isn't being used that much. Do you play with the medium CPU mission settings or low? I feel like if I go low then I'll miss out on the exciting furballs and getting jumped. 

[No_85_Gramps]

I have an 8700k also, hyper threading disabled, and all six cores locked at 4.7mhz, my CPU usage on Ultra game setting only hits about 40-45% (I have to double check that). I have a 1070ti at 1440p and usage is always around 95-100%. During most missions, MP and SP, I average around 90 fps, sometimes it will hit close to 140. I have a gsync monitor so I don't know how much that impacts things. My GPU stays locked at 1820mhz, with some undervolting to keep the temperature in check.

[DrDeath_MD]

My game FPS stays around 90 (RTSS locked) according to both the in game counter and RTSS's counter. However, I can tell you that based on head tracking and flight movement, that it is not 90 FPS. It is more 30-45 based on feeling. I am slso with a Gsync which I don't think makes a difference. I bet the game engine is running "slower' doing the calcuations but still out putting 90 fps even if some are duplicates (that's my hypothesis anyways). I'm at stock speeds since I found that the performance gain for over clocking was minimal for the heat it was generating. 

[PatrickAWlson]

Ai entities are the cause of slowdowns.  Multi place aircraft are the worst, followed by two place aircraft, followed by single place aircraft, with ground unit AI pulling up the rear but, if placed in large numbers, still contributing.  

[Atlantia39]

Hey Patrick,

Just curious...

 

On the generated missions is it better to go Low Density on Aircraft/Ground/AAA and Medium CPU for starters?

 

That way it doesn't cause too much choppyness while flying and reduce the burden on the 

CPU rather than the graphics card?

 

I had mediums across the board and experienced some slowdown/chop when I encountered multiple bandits...It was a flight of 7 Ju88's  and  4 Me110's.

[PatrickAWlson]

22 minutes ago, Atlantia39 said:

Hey Patrick,

Just curious...

 

On the generated missions is it better to go Low Density on Aircraft/Ground/AAA and Medium CPU for starters?

 

That way it doesn't cause too much choppyness while flying and reduce the burden on the 

CPU rather than the graphics card?

 

I had mediums across the board and experienced some slowdown/chop when I encountered multiple bandits...It was a flight of 7 Ju88's  and  4 Me110's.

 

 

Unfortunately it is impossible for me to tell you exactly how to configure.  It's hard to say how close or how far you are from getting the performance that you want.  Much also depends on how you ware playing.  If you are more air oriented then you probably want to sacrifice other things to keep planes in the air.  

 

Airplanes take the most bandwidth, with multi crew planes leading the pack.  Ground units and atmospherics also consume resources, but not as much.

 

Setting any simple config to low will save some CPU but anything related to airplanes will be more impactful.  If you are flying fighters then you probably want planes in the air, so setting ground and AA to low might allow you to put more planes in the air.  If you do want to resource CPU usage caused by airplanes I would first set CPU to low.  That will limit bombers and eliminate virtual escorts without reducing the total number of flights.

 

I also posted these tips in a different thread: playing with number of flights in advanced configurations. 

 

Reduce Friendly Flights

My first suggestion would reduce friendly flights to 1 or even 0.

Campaign -> Configuration -> Advanced Config -> Mission Limits -> Max Allied Flights

or

Campaign -> Configuration -> Advanced Config -> Mission Limits -> Max Axis Flights

depending on which side you are flying for.  Reducing friendly flights eliminates the resource drain while you still have opposition.  

 

Eliminate Virtual Escorts

Campaign -> Configuration -> Advanced Config -> Mission Limits -> Max Virtual Escorts

Set to zero

 

Reduce Ambient Ground Units

Campaign -> Configuration -> Advanced Config -> Mission Limits -> Create Random Ground Units In MIssion

Campaign -> Configuration -> Advanced Config -> Mission Limits -> Use Airfield MGs

Set both to zero (zero means false in this case)

 

Reduce Smoke

Campaign -> Configuration -> Advanced Config -> Mission Limits -> Maximum Amount of Smoke In the Area

Campaign -> Configuration -> Advanced Config -> Mission Limits -> Maximum Amount of Smoke In a Mission

Set these to zero

 

These will get rid of a lot of atmospherics but still keep enemy planes in the air,

 

 

 

 

[Atlantia39]

WOW!

Thanks Pat!