WIP FPS being significally worse in online race vs practice/qualy/warmup

Joonas Raivio

Joonas Raivio

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Hey, I've had this problem for a while now, happens in both single screen/VR (I don't have triples)

So what usually happens is I'm driving on almost full practice server, let's say VEC with up to 80 ppl on server and I have stable 90 FPS with around 4-8ms of GPU frame time according to FPSVR software, CPU frametime stays at around 7ms.

Then comes race and my fps goes to 30-45 with 15+ms of GPU frametime, CPU frametime stays around 7-10ms. And no, it wasn't just the start of the race where I had that fps, it stayed there for 80% of my VEC stint which was 2hours.

Also the FPS seems to go smaller everytime theres LMHC near me.

I'll update this report with trace+log from FPSVR once I get them, for now I only have the perflog.

AFAIK this happens to most of the people no matter the PC but for clarity there's my system specs: https://www.userbenchmark.com/UserRun/23628790
rF2 installed on mx300
Log: https://www.mediafire.com/file/onzbr6k915tp4p1/Log.zip/file

I don't use these forums alot so the best way to contact me is on discord: Captain Perkele#1271
Cheers, Joonas
 

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I reported this problem in March last year:
benborp said:
I've had a recurring problem for the last few months.

For regular league events that use the Endurance Pack I have severe CPU induced stuttering. It only occurs during the race itself.

During online practice sessions that often have almost twice as many drivers as the race there are no problems. Running the mod offline I can run races with 60+ vehicles with no problems. I have been slowly optimising everything I can and often think that I have solved the problem but all I manage to do is increase the overhead so that the issue is a little less severe - previously I have had to drop out of stints and swap with another driver on the team or even retire from events. I'm now at the point where I'm fairly confident that I can manage to get through a stint but pace suffers. Framerate and stuttering seem to worsen whenever I'm driving in close proximity to the GTE Porsche. In the last race my teammates were also suffering from framerate and stuttering issues that they hadn't experienced in extensive testing prior to the race.

Does anyone know of any reason why the on-line race event should place much higher demands on the CPU than experienced anywhere else?
Click to expand...

It was eventually resolved for me by performing a complete system re-install. Noted that my issue was definitely a CPU frametime limitation.

At the time, in response to other other drivers' queries, I stressed that I didn't see a system re-install as being an appropriate response for all that suffered similar race day problems.

But, for me, after extensive work with hardware, drivers, game settings, installation and options it was the only way to resolve the issue. In the following weeks I would occasionally recreate the problem, even with the clarity of running a bare bones system dedicated solely to rF2 the only way to get back to optimum performance was a complete Windows re-install.

I have been running rF2 for almost a year with steadily improving performance (a processor upgrade has also helped), the last VEC race saw a return of the problem.

I mention this as in my experience the issue did not lie within rF2. rF2 suffered from an inconsistency somewhere in my system environment (I started to resent how little control I had over Steam VR making changes to my system, making it very difficult to make comparisons to a stable baseline).

I hope this helps if this current itteration of the problem, that is affecting far more people, has an indirect cause somewhere in the OS.
 
davehenrie said:
is your power management of the cpu such that it throttles down the cpu when it overheats? Choose Performance setting.
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No it doesn't throttle: When I'm gaming I'm using high performance mode where cpu's min/max state is 100% and it's not that hot anyway to start throttling.
Also the FPS drop happens immediately after you change session. Not mid session, which indicates it's not overheating issue. Doesn't also really matter if the closest car is next to you or different side of the track, fps stays weak.
 
I ve got to report that today in the VEC preseason race at Imola that i had a similar issue. Was doing practice with normal 80-100 fps with 50+ cars on track. Even q ran smoothly. But when race session started i had max 30-35 fps with massive stuttering. As i found out i needed to create a performance log as trace and the advanced log is not enough to fix this issue apparently. I know my system is not the greatest but i got it as low as possible and no overheats but the difference is huge.
 
I have been experiencing this issue for quite a while now. It is always the Race session that causes the problem, no matter what League, track, mod etc. I recently upgraded my CPU and GPU and it copes better with the issue, but I am fully aware it is there as I can see it in fpsVR.
Yesterday I took part in the qualification session at VEC and rF2 ran very smoothly [even with half the grid sat in the pits]. However, in the race, going past the pits caused all sorts of issues for the CPU and GPU, but seemed to clear on the rest of the track. There is something different about the pits in a Race session, compared to any other session.
 
Lazaros Filippakos said:
I ve got to report that today in the VEC preseason race at Imola that i had a similar issue. Was doing practice with normal 80-100 fps with 50+ cars on track. Even q ran smoothly. But when race session started i had max 30-35 fps with massive stuttering. As i found out i needed to create a performance log as trace and the advanced log is not enough to fix this issue apparently. I know my system is not the greatest but i got it as low as possible and no overheats but the difference is huge.
Click to expand...
This. I have heard a lot of people that had this same issue last race
 
upload_2020-9-13_13-47-15.png


1080 lowest settings, 12 visible cars. 58-68 FPS at the start of last race. Same framerate as highest settings. This is on a 1080, so definitely not a bad card, but not the worst either. Full graphics setting is only used for 70%. Why? All CPU limited.

Everything seems to be running on a single core?
Why is the race so much more heavy (on the CPU apparently) than a practice session?
Why do more cars hit the CPU more than the GPU?
Why do some core spike to 100%, but never at the same time?

Just some questions that popped up in my mind by watching this
 
I can confirm that in online races performance significantly drops (for some to unplayable numbers). In my case not VR. Often in the warmup or practice session before the race everything is fine despite the same amount of cars on track.

My last example was the P1LMS race at NürburgringGP. Practice with same amount of cars 100+fps, race down to 50fps being the worst near the pits.
 
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Let me add to this, that the problem went away when my teammate took over from me and I still was spectating / driving with him
 
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