Hyperthreading for P3D. Yes or no?

[David Roch 1,982]

With my new hardware and with P3D v4.4 I don't use PL anymore or add any AM setting in CFG. I let P3D doing the job and it does it quite well today.
With HT off, all 8 cores are equally working bellow 90%, temps are bellow 60C and the sim is smooth when limiting frames to 30fps.

[Langyboy63 22]

25 minutes ago, GSalden said:

Batchfiles start apps from within Windows with the choosen affinity settings.

All other apps push the affinity settings..

Steve W has written about that several times. Just use Search. 

What text would you use for Active Sky for example? I get the hex calculation, but how exactly would that work in an actual .bat text.

[DocPadds 15]

That is exactly my scenario, turning HT off was the magic that made my sim come to life after getting stutters even on the 9900K, with plenty of ram and super fast storage.

20 hours ago, David Roch said:

Posts from 5 or 10 years ago are not anymore relevant.

I run P3D on a 9900K.
With HT: stutters.
Without HT: smooth.

Simply as that.

 

 

[GSalden 4,658]

2 hours ago, Langyboy63 said:

What text would you use for Active Sky for example? I get the hex calculation, but how exactly would that work in an actual .bat text.

I am not at home right now.

Tomorrow I will post an example...

[Ray Proudfoot 8,961]

3 hours ago, GSalden said:

Batchfiles start apps from within Windows with the choosen affinity settings.

All other apps push the affinity settings..

Steve W has written about that several times. Just use Search. 

SimStarterNG can also control AF with addon programs. But to be honest with P3D v4.4 using all cores it's not really an issue with me now. I have HT enabled and everything is silky smooth.

[Langyboy63 22]

That would be good, also I assume you run the program from the .bat rather than the exe, so perhaps you could explain how that bit works.

 

Appreciate you taking the time.

The Addons I have are UTL, Pro-Atcx, Active Sky, FFTF Dynamic, FSUIPC5 and Acars for Virtual Airline.

Windows 10 64 bit. So an example for any of these work be great.

[GSalden 4,658]

14 minutes ago, Ray Proudfoot said:

SimStarterNG can also control AF with addon programs. But to be honest with P3D v4.4 using all cores it's not really an issue with me now. I have HT enabled and everything is silky smooth.

SimStarter controls the AM pushed Ray so it is different from batchfiles.

The most important is that you are happy with your setup. 😀

Nothing else matters ...

[GSalden 4,658]

Btw : affinity and batchfiles

http://www.codelegend.com/forums/viewtopic.php?f=2&t=632

[bean_sprout 1,201]

My take is that HT threads are faster than physical ones since they are virtual (speed of light).  Yea the CPU will run hotter.  Have always used it.  Use HT if you can.

Regards
bs 

[Bert Pieke 7,585]

2 hours ago, bean_sprout said:

My take is that HT threads are faster than physical ones since they are virtual (speed of light).  Yea the CPU will run hotter.  Have always used it.  Use HT if you can.

Regards
bs 

bs indeed...  

[mikeymike 362]

I7 4790k ht on

4k hdtv 49inch at 25hz

tb vsync on unlimited FPS 

peocess lasso I have switched off the first LP which is 1 I believe 

0 234567 on for the sim 

mad Bert had advised some time ago 

and so far so good slight stutter

or if anybody else has any other advise for 4.4 

workd be appreciated 

 

thanks

mike

 

here and there 

 

[Mace 1,928]

31 minutes ago, mikeymike said:

I7 4790k ht on

4k hdtv 49inch at 25hz

tb vsync on unlimited FPS 

peocess lasso I have switched off the first LP which is 1 I believe 

0 234567 on for the sim 

 

I'll respond to your request for insight below -- this thread caused me to retest my settings with 4.4 now.

And I have found still -- on my hex core rig (8700K @ 5.0) for smoothness and no blurries I have to run HT=ON, and have P3D to use all cores.  
Vsync on / framelock 30.  (slight stutter with unlimited).   32" 4K screen at 30 refresh.
The only thing I use PL for is to get other apps / processes away from Core 0 and 1, and I may switch to letting FSUIPC5 handle that.  Or task manager.  Not sure yet.

The above is smooth and nice for my machine.

Now, as to your settings, all I can say is, if I deny P3D the use of all available cores (LP1 or whatever) it induces stuttering.

As always I am all ears for ways to get more out of what I have.  Good thread anyway.

 

 

[David Roch 1,982]

I don't understand this obsession to let Core 0 and 1 free for P3D for hexa or octo CPUs. They are not anymore the main core used by the simulator since P3D engine is using all available cores (P3D v4.xx).
What was true 2 years ago is not today's reality.

Here is the CPU usage, without AM.
(HT is OFF)
You can see all 8 cores working almost equally.

Edited December 16, 2018 by David Roch

[GSalden 4,658]

6 hours ago, David Roch said:

I don't understand this obsession to let Core 0 and 1 free for P3D for hexa or octo CPUs. They are not anymore the main core used by the simulator since P3D engine is using all available cores (P3D v4.xx).
What was true 2 years ago is not today's reality.

Here is the CPU usage, without AM.
(HT is OFF)
You can see all 8 cores working almost equally.

By default P3D starts on core 0 for the main thread and other cores are mainly for terrain loading.

My main thread core is always near 100% while the others are 20-30%. That is with heavy scenery.

 

Edited December 16, 2018 by GSalden

[Bert Pieke 7,585]

8 hours ago, David Roch said:

I don't understand this obsession to let Core 0 and 1 free for P3D for hexa or octo CPUs. They are not anymore the main core used by the simulator since P3D engine is using all available cores (P3D v4.xx).
What was true 2 years ago is not today's reality.

Here is the CPU usage, without AM.
(HT is OFF)
You can see all 8 cores working almost equally.

Sorry David... there may be times when all cores are busy, but stay still for a while and watch what happens.

Edited December 16, 2018 by Bert Pieke