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Lenovouser

P3D V5.4 High CPU Usage & Temps

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Hi there,

I`m using an i7-12700K with 8 p-cores and 4 e-cores, HT enabled. What settings would be recommended for the job scheduler?

 

All the best,

Alex

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I have an identical setup to yours, including cpu.

Here is my setting and it works well

[JOBSCHEDULER]
AffinityMask=43694

 

hope this helps

Sherm

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Hi SteveW, all,

my system is a 13-900k / RTX4080. I have connected 3 Full HD projectors  for my home cockpit. So even though my hardware is quite performant, I still have to be conservative with my settings. 

I have followed the advise for affinity masking from page 4 of this thread. The only change I made, was to set the schedulers to 1/3/5 instead 0/1/2

[JobScheduler]
AffinityMask=268391765
P3DCoreAffinityMask=268391765
MainThreadScheduler=1
RenderThreadScheduler=3
FrameWorkerThreadScheduler=5

This gave me an improvement of +5-10 FPS. So I am absolutely thankful for this.

However, I was monitoring my CPU performance with HWInfo and I was surprised to see kind of low avg CPU usage of less than 20%! GPU a bit more than 20%. Please see attached pictures on CPU and GPU performance from my last test flight going around EDDL in bad weather conditions.

CPU/GPU Utilization

CPU Cores

Do these metrics look right to you, considering my hardware? I am especially concerned about the following:

  • overall CPU usage less than 20% at average
  • while on core 1 (main thread scheduler) thread 0 performs at 100%, thread 1 (Hyperthread?) is not really leveraged
  • while cores 1, 3, 5 perform rather stable, cores 0, 2,4,6,7 are going up and down

Maybe usefull additional info: I have reduced the short and long duration power limit of my CPU to 125w. That helped a lot with temperature (now avg of ~60 celsius). Not sure, if there might be a relation.

Thanks again for your advise!

Edited by michael1508

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Hi,

I have elevated temperatures again.

I haven't dealt with it for a while... After I fixed the problem back then.

But yesterday I flew from EFRO to EDDF and it was constantly 87-88-89 degrees in the air.

My AffinityMask currently looks like this:

[JobScheduler]
AffinityMask=65493
P3DCoreAffinityMask=65493
MainThreadScheduler=0
RenderThreadScheduler=1
FrameWorkerThreadScheduler=2

CPU AMD 5800x3D.


Is there anything you can do here to lower the temps?

Thanks

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Yes, you have several options:

1) spread the load better. As of now, you're forcing both the main and render threads to run in Core 0 (Threads 0 and 1). You may set either 0 or 6 for Main thread, 2 for Render and 4 for Frame. That way, you'll be running each of P3D's threads in a physical core (instead of sharing physical and logical). That might be the easiest one to apply.

EDIT: I misread your AM settings. After a second read, I see you did correctly (Main/Render/Frame threads each in a dedicated physical core).

2) turn SMT off (in BIOS) and recalculate your affinity mask.

3) Improve your cooling: the 5800X3D runs rather hot, compared to other AM4 CPUs. That's the most expensive option here...

Ah, and lock your frame rate externally (either in Nvidia Control Panel or RTSS). Unlike MSFS (and it's pesky camera transitions), 30 FPS is good and smooth enough for P3D. If you lock within P3D, or don't lock FPS at all, your CPU would be forced to run at 100% at all times.

Edited by Luis Hernandez
  • Like 1

Best regards,
Luis Hernández 20px-Flag_of_Colombia.svg.png20px-Flag_of_Argentina.svg.png

Main rig: self built, AMD Ryzen 5 5600X with PBO enabled (but default settings and SMT off), 2x16 GB DDR4-3200 RAM, Nvidia RTX3060 Ti 8GB, 256 GB M.2 SSD (OS+apps) + 2x1 TB SATA III SSD (sims) + 1 TB 7200 rpm HDD (storage), Viewsonic VX2458-MHD 1920x1080@23-144 Hz (locked at 120 Hz), Windows 10 Pro. Runing FSX-SE, MSFS and P3D v5.4 (with v4.5 default airports; the best of both worlds!).

Mobile rig: ASUS Zenbook UM425QA (AMD Ryzen 7 5800H APU @3.2 GHz and boost disabled, 1 TB M.2 SSD, 16 GB RAM, Windows 11 Pro). Running FS9 there... sometimes on just battery! FSX-SE also installed, just in case. 

VKB Gladiator NXT Premium Left + GNX THQ as primary controllers. Xbox Series X|S wireless controller as standby/travel.

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Hi,
ok to:
1. So I'll adjust Affinity Mask?

[JobScheduler]
AffinityMask=65493
P3DCoreAffinityMask=65493
MainThreadScheduler=0
RenderThreadScheduler=2
FrameWorkerThreadScheduler=4

Should I change it like this?`

2. I have read very often that you should leave SMT activated. But if nothing else helps, that would be an option.

3. I almost had to switch to custom water cooling.

My PC has a very powerful AIO, plus 10 x 140mm fans, some of which run at 1500 RPM.

As I said, I never have any problems with CPU temp... It only gets extremely high in P3D

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43 minutes ago, Lenovouser said:

[JobScheduler]
AffinityMask=65493
P3DCoreAffinityMask=65493

Sorry Lenovouser, I misread you. I thought I read 65535. With 65493, your current AM settings are right. My apologies 🙇‍♂️

SMT on may help with other apps, but not with flight sims, as far as I've seen. If your temperatures are OK, there's no reason to turn it off if ou have a good AM... but that's not your case. But, before messing with BIOS, do you lock your framerate? If so, how?

Your cooling looks good; at least a lot better than mine (aircooled, 220W TDP CPU cooler, 4 x 120 mm fans (2 in, 2 out) and I reach barely 80°C (peak) in MSFS. I started keeping SMT on because I run several utilities along my sim. Unless there's something going wrong with your AIO pump or your thermal paste, I wouldn't worry about that.

Edited by Luis Hernandez

Best regards,
Luis Hernández 20px-Flag_of_Colombia.svg.png20px-Flag_of_Argentina.svg.png

Main rig: self built, AMD Ryzen 5 5600X with PBO enabled (but default settings and SMT off), 2x16 GB DDR4-3200 RAM, Nvidia RTX3060 Ti 8GB, 256 GB M.2 SSD (OS+apps) + 2x1 TB SATA III SSD (sims) + 1 TB 7200 rpm HDD (storage), Viewsonic VX2458-MHD 1920x1080@23-144 Hz (locked at 120 Hz), Windows 10 Pro. Runing FSX-SE, MSFS and P3D v5.4 (with v4.5 default airports; the best of both worlds!).

Mobile rig: ASUS Zenbook UM425QA (AMD Ryzen 7 5800H APU @3.2 GHz and boost disabled, 1 TB M.2 SSD, 16 GB RAM, Windows 11 Pro). Running FS9 there... sometimes on just battery! FSX-SE also installed, just in case. 

VKB Gladiator NXT Premium Left + GNX THQ as primary controllers. Xbox Series X|S wireless controller as standby/travel.

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