CPU Multithreading active? (solved: yes) | VSYNC bug?

[BRAN]

Still trying to figure out, what the culprit is. Vsync and Framelimiter seem to be a good hint.
Getting solid 60FPS in practice mode, once switching to race, FPS are cut into half = 30FPS.
Does not matter, if it is just 1 opponent or 10 or 20.
Settings at first on ultra, then switched to high, DLAA. Same outcome.
GPU is never at 100%, average around 90%, and CPU is around 25%.

I notice 1 MAJOR RED FLAG. ONLY 1 CPU CORE IS USED, basically at 100%!!
NO MULTITHREADING active yet?

i9 10900X (20threads) | RTX 4080 | 128GB Ram | NVMe | Win11 | 5k 5120x2160 @ 60Hz

[BRAN]

Do you have bad FPS, stutters, lags? Check your cpu threads.
Single thread? There is your bottleneck.

[BRAN]

Okay, just checked...Laguna Seca ultra setting, same configuration:

AC = 2 cores @ 95% (overall CPU usage was around 15-20%)
ACC = Multicore, all cores evenly used (overall CPU usage 25-30%)
AC Evo = Single Core @ 99% (overall CPU usage 20-25%)

This clearly shows, that EVO, as promoted) is using AC technology.
Could that be that notorious "99% single core usage" bug, which occured in AC?

[gimlikos84]

Originally posted by BRAN:

Okay, just checked...Laguna Seca ultra setting, same configuration:

AC = 2 cores @ 95% (overall CPU usage was around 15-20%)
ACC = Multicore, all cores evenly used (overall CPU usage 25-30%)
AC Evo = Single Core @ 99% (overall CPU usage 20-25%)

This clearly shows, that EVO, as promoted) is using AC technology.
Could that be that notorious "99% single core usage" bug, which occured in AC?

every one has this issue.This game is really bad optimised , and we need to wait for an update.

[Mordekai2009]

RTX 4080 with 16GB Video memory and using 5120x2160? It's very VRAM heavy for a race with 30 AI drivers.
Please try the lowest graphics settings and see if that helps.

Oh btw! Take a look of my own VRAM measurements:
https://steamcommunity.com/app/3058630/discussions/0/756142145462638408/

[BRAN]

Yup, did that already:
Everything on low, absolute minimum + DLSS on Ultra performance, ONLY that combo brought me back to 60FPS in 5k in a race. And it does not even matter, if it is 1 or 30 opponents. No problems with practice mode, as I said.
And the GPU usage is way below 50% then, with CPU usage below 20%.

The question I have here is:
Is AC Evo not multicore optimized yet?
Atm I only see 1 single core being used @ 99%.
How is your CORE usage?

[BRAN]

Originally posted by Mordekai2009:

RTX 4080 with 16GB Video memory and using 5120x2160?
https://steamcommunity.com/app/3058630/discussions/0/756142145462638408/

Yup, RTX 4080 can handle 5k @ 60Hz EVEN with Full Raytracing.
Of course full RT needs DLSS support, without Raytracing in runs on DLAA in 5k @ 60Hz/FPS

Forza Motorsport + FULL RT with solid 60FPS DLSS quality
Cyberpunk 2077 full PATH Tracing solid 60 FPS DLSS quality
INDY FULL RT

AC Evo is NOT playing in that league at the moment.

[Mordekai2009]

Originally posted by BRAN:

Yup, did that already:
Everything on low, absolute minimum + DLSS on Ultra performance, ONLY that combo brought me back to 60FPS in 5k in a race. And it does not even matter, if it is 1 or 30 opponents. No problems with practice mode, as I said.
And the GPU usage is way below 50% then, with CPU usage below 20%.

The question I have here is:
Is AC Evo not multicore optimized yet?
Atm I only see 1 single core being used @ 99%.
How is your CORE usage?

I ran a test with 30 AI drivers at Brands Hatch. Dry condition with clear sky during Day.
On minimum graphics settings at 3840x2160.

The first four cores had the usage of around 75% or lightly less while the two cores was at around 40-50%. The last two cores sitting very low but it does show the utilziation from this game.

Proven enough to be an active CPU multithreading.
My CPU is AMD Ryzen 7 7800X3D without SMT/virtual cores.

Looks like. Could be a specific CPU issue for this game. No idea what's caused for.

[BRAN]

Originally posted by Mordekai2009:

Originally posted by BRAN:

Yup, did that already:
Everything on low, absolute minimum + DLSS on Ultra performance, ONLY that combo brought me back to 60FPS in 5k in a race. And it does not even matter, if it is 1 or 30 opponents. No problems with practice mode, as I said.
And the GPU usage is way below 50% then, with CPU usage below 20%.

The question I have here is:
Is AC Evo not multicore optimized yet?
Atm I only see 1 single core being used @ 99%.
How is your CORE usage?

I ran a test with 30 AI drivers at Brands Hatch. Dry condition with clear sky during Day.
On minimum graphics settings at 3840x2160.

The first four cores had the usage of around 75% or lightly less while the two cores was at around 40-50%. The last two cores sitting very low but it does show the utilziation from this game.

Proven enough to be an active CPU multithreading.
My CPU is AMD Ryzen 7 7800X3D without SMT/virtual cores.

Looks like. Could be a specific CPU issue for this game. No idea what's caused for.

Hm, interesting. Anyways, thanks for the feedback! I bet, it is the same with AC for you.

[Trezoitao38]

Well, with my GTX 1080 I get 100% use with only 32 fps at the start of the race.

This game requires a lot from both CPU and GPU to handle too many cars.

[BRAN]

Originally posted by Trezoitao38:

Well, with my GTX 1080 I get 100% use with only 32 fps at the start of the race.

This game requires a lot from both CPU and GPU to handle too many cars.

What CPU do you use? Are multiple CPU Cores active during a race?

[Trezoitao38]

Originally posted by BRAN:

Originally posted by Trezoitao38:

Well, with my GTX 1080 I get 100% use with only 32 fps at the start of the race.

This game requires a lot from both CPU and GPU to handle too many cars.

What CPU do you use? Are multiple CPU Cores active during a race?

i7 12700KF. I didnt see what cores are active.

But this is not relevant because AC1 was the same with threading and I can keep more than 144 fps with 18 cars at the start of the race.

[FerSantander]

Disable core parking on Windows.

If your CPU has e-cores, disable them too and hyperthreading as well.

Report back

[BRAN]

i9 10900X = 10 cores, + HT = 20 threads
no e-cores, no modern core parking, but I disabled all C-state options.

Then I disabled HT= No real change. Just 2 noticable hickups, where I would get 5-10 secs MULTICORE usage of all cores and immediately BUTTERsmooth fps/controls.
Then it fell back to its single core 100% usage. :-/

At least I saw, that multicore can kick-in. Not sure, what is holding it back atm.

[FerSantander]

Originally posted by BRAN:

i9 10900X = 10 cores, + HT = 20 threads
no e-cores, no modern core parking, but I disabled all C-state options.

Then I disabled HT= No real change. Just 2 noticable hickups, where I would get 5-10 secs MULTICORE usage of all cores and immediately BUTTERsmooth fps/controls.
Then it fell back to its single core 100% usage. :-/

At least I saw, that multicore can kick-in. Not sure, what is holding it back atm.

It is poor CPU optimization one might presume.

Still, disable core parking on Windows (nothing to do with c-states or any other cpu-BIOS option), and see what happens. Many games have had trouble because of this in the past, Battlefield for instance.

I take for granted you have any anti-virus/firewall disabled while executing the game as well, or any other background windows/3rd party stuff that might interfere. I mean Windows defender disabled as well, at the very least its control flow guard thing, which is another crap that might interfere with games (not enough with adding exception to ACE.exe)

It is the only way to be sure your CPU still isn't optimized for this game, yet, which I find weird nonetheless.

[BRT Cobra]

vram is the issue. on lowest settings it fills an 8gb gpu at 1440p id wait till they optimise it more