6 hours ago, Alcides Segovia said:

Would you be able to do the same calculation for me Ray? I7-10700K

I can Alcides but the links I have pointed to in earlier posts do explain how to work it out.

Your CPU has 8 cores and 16 VPs. It’s possible P3D doesn’t need to use all of them. But if you want to assign all then this is how it would look. The first VP is at the right-hand end, not the left. Read it in reverse.

0101010101010101

And that equates to an AM setting of 21845.

4 hours ago, Ray Proudfoot said:

I can Alcides but the links I have pointed to in earlier posts do explain how to work it out.

Your CPU has 8 cores and 16 VPs. It’s possible P3D doesn’t need to use all of them. But if you want to assign all then this is how it would look. The first VP is at the right-hand end, not the left. Read it in reverse.

0101010101010101

And that equates to an AM setting of 21845.

Thanks Ray. I was getting confused with selecting Hyperthreading or not on the affinity calculator so I wanted to make sure I was setting it correctly. 

4 minutes ago, Alcides Segovia said:

Thanks Ray. I was getting confused with selecting Hyperthreading or not on the affinity calculator so I wanted to make sure I was setting it correctly. 

Just make sure you have Hyperthreading turned on in the BIOS. Come back with your opinion as to whether it makes a difference.

@Ray Proudfoot which AM would be right for an I7-7700k with HT on and HT off?

2 hours ago, mobiel said:

@Ray Proudfoot which AM would be right for an I7-7700k with HT on and HT off?

I’m not sure why I’ve become the go to person to give people the AM setting for their CPU.

It really isn’t difficult to work it out yourself. Firstly, google your CPU and go to the Intel site assuming it’s an Intel CPU. That site will tell you how many cores and VPs it has.

For the i7-7700K it’s 4 cores and 8 VPs

170 with HT enabled. No AM is required if HT is off.

LATER: This is a nice utility to work out your AM setting. You’ll need to know how many cores/vp it has. Choose 1 VP per core for as many cores as your CPU has.

http://store.fsxtimes.com/cal-cam.php

On 7/22/2021 at 7:14 AM, Ray Proudfoot said:

Just make sure you have Hyperthreading turned on in the BIOS. Come back with your opinion as to whether it makes a difference.

Hey Ray.

 

Sorry for unleashing this spectrum of request to you. I apologize good sir. The affinity mask did smooth things out in terms of the panning etc. but at the cost of blurry terrain. Taking it off allowed acceptable smoothness and no blurries. Looking at Process Lasso I could tell that those cores now were pegged, where before it distributed it everything. It was worth a try. 

 

Thanks sir!

8 minutes ago, Alcides Segovia said:

Hey Ray.

Sorry for unleashing this spectrum of request to you. I apologize good sir. The affinity mask did smooth things out in terms of the panning etc. but at the cost of blurry terrain. Taking it off allowed acceptable smoothness and no blurries. Looking at Process Lasso I could tell that those cores now were pegged, where before it distributed it everything. It was worth a try. 

Thanks sir!

You never said what version of P3D you’re using. v5.2HF1 I trust.

And what refresh rate is your monitor running? 30Hz hopefully. 

With my own setup core 0 does the bulk of the work and cores 2, 6 and 10 are used to load scenery. If you have blurries check what the other cores are doing. If they’re maxxed out that might suggest scenery loading problems.

You have more cores than mine so try experimenting with different AM settings rather than just using them all. A screenshot of Performance in Task Manager would help.

Watching the p3d cpu usage it seems there might be a problem with the method fsl uses to assign its processes to the cpu, as with the a32x loaded all cpu cores get used near equally in task manager which is similar to what happens when changing the p3d cpu affinity there while the sim is running that leads to the primary and other threads circulating on all selected cores. This makes the affinity mask useless, perhaps that is why it is recommended to have only either no AM or HT off equivalent AM with the aircraft. This becomes a problem with 4 core systems as former does not allow main p3d thread to have an entire core resulting in lower than possible average fps and the latter limits the cores available for terrain loading and other secondary tasks causing long frames. If fsl could fix this so that the p3d cpu thread assignment does not malfunction, which for instance FSUIPC already handles correctly, it would allow some performance benefit to quad core CPUs with the bus.

3 hours ago, him225 said:

Watching the p3d cpu usage it seems there might be a problem with the method fsl uses to assign its processes to the cpu, as with the a32x loaded all cpu cores get used near equally in task manager which is similar to what happens when changing the p3d cpu affinity there while the sim is running that leads to the primary and other threads circulating on all selected cores. This makes the affinity mask useless, perhaps that is why it is recommended to have only either no AM or HT off equivalent AM with the aircraft. This becomes a problem with 4 core systems as former does not allow main p3d thread to have an entire core resulting in lower than possible average fps and the latter limits the cores available for terrain loading and other secondary tasks causing long frames. If fsl could fix this so that the p3d cpu thread assignment does not malfunction, which for instance FSUIPC already handles correctly, it would allow some performance benefit to quad core CPUs with the bus.

after over a week of tinkering with it, and looking at taskmanger I agree.  thanks ray for the affinty mask input,  but im still putting my money on because people on here moaned about having cheap 10 year old gfx cards and asking for low vram, LM have gone and tinkered with it so more is put on the cpu not the GPU,  (which with the FSL is the last thing you want to do)   

As I always say.  you reap what you sow.  But LM have done what people wanted via the beta testers.  great, now we can all take screenshots like derek and bob around alaska with the frames locked at 10 and post them on insta. 

I now have an FSL using less than 3 gig vram (on an 11gib card)  but now the proformance is downgraded.   the last thing I want to do is to go back to 5.1

I give with this sometimes, how many pages was that topic about cpu's what 40+ pages ?  we are idiots in the community.  we've just shot ourselves in the foot, and LM wont go back and change it now. i give up  

Edited July 24, 20214 yr by fluffyflops

2 hours ago, fluffyflops said:

I now have an FSL using less than 3 gig vram (on an 11gib card)  but now the proformance is downgraded.   the last thing I want to do is to go back to 5.1

I don’t have the FSL Airbus so can’t help but have FSL given any advice as to how P3D AM should be configured for the Airbus?

You might find this curious. I set an AM for P3Dv3 which I use purely for 32-bit Concorde. Having loaded that aircraft I checked the cores in use in Task Manager - Details - Prepar3d.exe (right click and choose Set Affinity) and was amazed to see all cores assigned when I had set something very different.

I asked why the User setting was being overwritten but have received no reply.

You might want to check if they’re doing the same with the 64-bit Airbus.

Thanks Ray. I'll have a look 

18 hours ago, Ray Proudfoot said:

I’m not sure why I’ve become the go to person to give people the AM setting for their CPU.

It really isn’t difficult to work it out yourself. Firstly, google your CPU and go to the Intel site assuming it’s an Intel CPU. That site will tell you how many cores and VPs it has.

For the i7-7700K it’s 4 cores and 8 VPs

170 with HT enabled. No AM is required if HT is off.

LATER: This is a nice utility to work out your AM setting. You’ll need to know how many cores/vp it has. Choose 1 VP per core for as many cores as your CPU has.

http://store.fsxtimes.com/cal-cam.php

Thanks Ray nerverless your help is useful

I noticed a huge perf drop when selecting tiller steering (button pushed in) and one of the on-screen warning windows that appears at the top as a green bar. As soon as I deselected the warning option in the CDU the perf issue went away.

44 minutes ago, mobiel said:

Thanks Ray nerverless your help is useful

Thanks. Did the AM make a difference?

4 hours ago, HUSSAR said:

I noticed a huge perf drop when selecting tiller steering (button pushed in) and one of the on-screen warning windows that appears at the top as a green bar. As soon as I deselected the warning option in the CDU the perf issue went away.

Yes this is a common issue. 

It's been raised over and over again.  

LM know about it.  

FSL knows about it.

Been there since v5 release. 

You have to turn it off in the settings. 

'Sticky button warnings'