1 hour ago, Richdem said:

Where in NVidia Control Panel do you set teh FPS to 31?

1 hour ago, TheRandomGuy said:

I've read alot on different forums/reddit. Those who don't manage to solve their performance issues with different tweaks/change of in-game settings either have i3 or i5 processors. They lack hyperthreading. I'm starting to believe that we might be out of luck in case Asobo can't find some specific issue. Also from what I've seen most people with i7 or i9 processors either don't have any problems or they manage to sort it out by trying out different fixes and/or enabling HT in case it was disabled. Surely some poor soul with an i7 or i9 might still have problems but it doesn't seem to be as many.

So I thought I'd test this out. My simming computer is dedicated just to flight sim. So I bought the gamepass for $1 and installed it on our regular gaming computer, which has an i7 9700k (rather than the i5 9600k on my sim machine). The i7 doesn't overclock as well as the i5, and given the single core dependency of P3D, the i5 at 5ghz was wonderful.

Anyhow, the i7 is OC'd to 4.8ghz. Now, neither the 9th gen i5 or i7 have hyperthreading (only the i9 does), but the i7 has two more cores - so 8 physical and logical, versus the 6 of the i5. I setup the sim with exactly the same settings and it has an equivalent GPU.

Bottom line: the i7 has the same spikes across all 8 cores as my machine has with 6 cores. However, they are slightly less impactful on the i7. I see stutters, but there are fewer of them and they're shorter in duration. When the spikes aren't happening, the i7 has half its cores at under 20% and the other four cores working at about 85%.

So, I guess this does support the theory that more cores makes this less bad, but what's stunning to me is that these CPU spikes occur even with settings all the way on low.

Given this, I'm surprised more people aren't experiencing this or at least seeing these spikes. Is the solution to swap in an i9? I suspect I'd still see the same 4 cores working at 85% most of the time, but perhaps when it came time for the spikes, the 16 LPs could handle it without disrupting the sim?

1 hour ago, SteveFx said:

Looking at resource monitor I seem to lose a whole core to various services - mainly AppInfo - do other people see the same?

Nope, I don't see that.

1 hour ago, erickrueger said:

Thank You,

Talk about cannot see the wood from the trees lol  

I totally missed that 

3 hours ago, Denwagg said:

I've been flying the same half hour saved flight for the last two days trying to figure out why I have 5 mins of smooth flight followed by 30 secs of stutter

Trying multiple things finally had a flight without any stutters perfectly smooth. Never had any flights before without stutters.

Not saying this is a fix for me but here is what worked

Set my monitor to 60 fps

In Nvidia settings set FPS to 31 and 1/2 refresh rate

Set advanced windows settings to background applications per this thread

Do not know if all of these are necessary but its working for the first time

So, I just did the 60 fps and 1/2 refresh rate thing with frames at 31 in NCP. What do you know...the CPU spikes are still there, but I maintain 30/31 FPS. This has introduced some microstutters that didn't exist with 30hz vsync, but I think the trade off is worth it... So, I still think there's a bug for Asobo to fix and I've reported it, but this solution has somehow solved my periodic CPU framerate problem. I didn't expect that at all...

So, thanks!

20 minutes ago, cwburnett said:

So, I just did the 60 fps and 1/2 refresh rate thing with frames at 31 in NCP. What do you know...the CPU spikes are still there, but I maintain 30/31 FPS. This has introduced some microstutters that didn't exist with 30hz vsync, but I think the trade off is worth it... So, I still think there's a bug for Asobo to fix and I've reported it, but this solution has somehow solved my periodic CPU framerate problem. I didn't expect that at all...

So, thanks!

I had a few micro stutters also with Newest Nvidia drivers. Uninstalled all nvidia including control panel and reverted to the last drivers before the ones released tues.

 

I flew my half hour fight again and noticed much less microstutters.

2 hours ago, Denwagg said:

I had a few micro stutters also with Newest Nvidia drivers. Uninstalled all nvidia including control panel and reverted to the last drivers before the ones released tues.

 

I flew my half hour fight again and noticed much less microstutters.

Would you mind sharing which driver you are currently using ?

Thanks

Spikes were around during testing. The consensus was the spikes were a result of the streamed scenery been injected into the sim.

10 hours ago, MrFuzzy said:

I had this before, resolved by disabling the rolling cache in the Data settings.

So if I'm running data on with a gigabit connection is there even a need for rolling cache? Is there something I will be losing out on if I shut it off??

For those people with i5s and other processors with only four cores (including virtual), there's some room for hope. Red Dead Redemption 2 had a very similar set of issues on PC launch with i5 processors. After a few weeks, Rockstar added a special command-line option to redistribute CPU processing such that you didn't have spikes and freezes on i5s. (At that time I wasn't using hyperthreading -- thanks, P3D! -- and it also solved my RDR2 performance issues on my i7.)

Asobo could potentially do something similar that would make this usable on i5s.

James

47 minutes ago, honanhal said:

For those people with i5s and other processors with only four cores (including virtual), there's some room for hope. Red Dead Redemption 2 had a very similar set of issues on PC launch with i5 processors. After a few weeks, Rockstar added a special command-line option to redistribute CPU processing such that you didn't have spikes and freezes on i5s. (At that time I wasn't using hyperthreading -- thanks, P3D! -- and it also solved my RDR2 performance issues on my i7.)

Asobo could potentially do something similar that would make this usable on i5s.

James

I remember that - and it worked wonders for my 2012 Ivy bridge 

there is indeed hope - especially as they have clearly rushed this out before any planned date.

I also hope DX12 is no more than 12-18mths away

"Would you mind sharing which driver you are currently using ?

Thanks"

 

Im running 451.48 drivers

 

I have exactly the same issue as the OP so I’m following this with interest.  
 

For me FPS doesn’t reduce but cpu hits max on all cores with some high temps.  I’ll post more details when I get a chance. 

On 8/23/2020 at 5:19 PM, honanhal said:

I’ve been generally thrilled with performance after turning on hyper threading and dialing back my i7 6700k overclock to 4.4 GHz, but there’s one remaining annoyance: from time to time my CPU usage, which is normally around 50-60%, shoots up to 100% for about 5 seconds (with my fans spooling up as the temperature spikes, although not above 80C) and then goes back down. While this happens FPS goes from a smooth 60 FPS in GA aircraft down to a stuttery mess in maybe the teens, and then recovers.

Hard to pin down exactly what it is — time compression makes it happen more often, so seems like it’s probably related to terrain loading. Hills/mountains also seem to correlate with it more often than really flat terrain. Sometimes it doesn’t happen for 30 minutes, sometimes it happens every 5 minutes.

Anyone else seeing this? Any idea how to mitigate this? Is this just something Asobo have to patch to make CPU load more even?

James

As mentioned I've had exactly the same problem.  I have an i7-7700K at 5.0 and huge cpu spikes every 3 or 4 minutes.  The rest of the time cpu is around 30-40% and GPU (2080ti) a stable 60%.

I also thought it was scenery loading related and others on the forums seem to agree so I tested the theory with a very boring 1 hour flight over the water.  No spikes at all.

I've started messing around with the LOD sliders for scenery and buildings and I have to reduce them both to around 50% to make a consistent improvement.   I'm flying in the 172 mainly so nothing too fast.

The frustration is when things aren't loading the cpu is hardly working.  Hopefully there is some kind of optimisation coming - but in the meantime I'll just dial back the sliders.

Can I ask if anyone is running LOD higher without spikes?  I'm running Hyper Threading on and have tried all other tips I can find.

 

Thanks