3 hours ago, SteveW said:

I've been comparing AMs P3D v4 on four cores +HT:

11,11,11,01=253 main task runs well but the background loading on LP3 intercepts second task on LP2 core 1 reducing overall performance, rendering performance is staggered, and adds no increase in loading performance.

11,11,01,01=245 main task performs well and the background tasks perform well without intercepting the second task on LP2, rendering performance is not staggered.

01,01,01,01=85 main task performs well and the background tasks perform well without intercepting the second task on LP2, rendering performance is not staggered. Background tasks can sometimes take a small amount longer to load certain objects but rendering is very slightly improved.

Avoid 255 and 253, use 245 or 85. Keep addons on last two cores 10,10,00,00.

I switched from 85 to 245, and set up TrackIR to run on the last two cores only, and... WOW.  85 was running nicely but 245 is even smoother now when panning in the VC.  Thank you!

Steve

For v4 shall i stay with 116 or perhaps try a different af mask?

Thanks

Mike

6 hours ago, mikeymike said:

116 has been working great with ht on

I7 4790k

+1

6 hours ago, SteveW said:

With a .bat file use something like:

start /B "" /affinity A0 "C:\Program Files (x86)\FSWeather\FSWeather.exe"

Where A0=10,10,00,00 - the app will start only on those two cores and be restricted to only those. When using programs like proc lasso if the app is started first it will start on 11,11,11,11 and then be corralled into 10,10,00,00 and is not the intended result. The .bat method ensures the app starts only on those LPs we want, make sure any affinity changing apps do the same.

 

instead of creating a batch file, can also create a shortcut that launches an .exe with /affinity assigned to it.  

see https://www.eightforums.com/tutorials/40339-cpu-affinity-shortcut-program-create-windows.html

for this to work, have to launch the shortcut as an admin (or config to run as admin).  

I have AM=01011101 (93d) for p3dv4, so assigned trackIR to 00000010 (02 hex), and ASP4/ASCA to 10100000 (A0 hex).  Works well.

 

 

Excellent kdfw.

I'm looking at this tomorrow.

 

Cheers,

Mark

4 hours ago, mikeymike said:

Steve

For v4 shall i stay with 116 or perhaps try a different af mask?

Thanks

Mike

Hi Mike,

Interesting and useful point to bring in.Reason for 116=01,11,01,00 is that we would have an aggressive addon that saturates a core. If we use 85=01,01,01,01 or 245=11,11,01,01 and even if we carefully only run it only on cores of the background tasks 10,10,00,00 it stalls those cores and decreases the sim performance whatever we do. So with HT enabled we can do 116=01,11,01,00 and use four LPs and pull out the main task onto its own core, the two tasks on the third core don't max out together so yield the least decrease in performance, the rightmost pair of LPs (LP0 and LP1) are unused by the sim and the addon can there on 00,00,00,11 unable to affect the sim. Otherwise try 85 and 245.

The shortcut method works great, because it's basically a one line batch file and similar commands work from the batch files just the same. I do find it easier to actually write out the command line in notepad before copy and paste into a shortcut box. The .bat files can be stored in a backup up location and shortcuts can be dragged and dropped from them onto the desktop or menu just the same. An advantage of the bat file method can start a selection of apps and the sim itself.

6 hours ago, newtie said:

start /B "" /affinity A0 "C:\Program Files (x86)\FSWeather\FSWeather.exe"

OK, I'm assuming 'start /B' is start the batch file and is not dependent on anything else, that is, using a Z instead of a B. Is there a space between the B and ""?

What's the relationship between A0 and the AM? What would 85 look like and why?

The rest makes sense.

 

Thanks,

Mark

/B? can't remember Mark without looking up some help page on the web for that stuff. A0 is simply the Hex value 10100000=160 decimal can probably do a decimal version of the command but that line works fine with Hex as it stands simply replace app path with path of your exe and Hex value of mask required. 85=01010101 would be 55 Hex but you would leave the sim to set it's own affinity through setting the jobscheduler value AffinityMask.

...the following line worked well in both the shortcut Target and in the .bat file and uses a decimal value for the AffinityMask which may be preferred:

C:\Windows\System32\cmd.exe /c start "Notepad" /affinity 9 "C:\Windows\Notepad.exe"

1 hour ago, kdfw__ said:

can also create a shortcut that launches an .exe with /affinity assigned to it.

Thanks, it's a good point - we can use .bat commands in the Target line of shortcuts, I've included that in my forum help pages on using bat files.

Guys, when testing P3D and viewing graphs in Task Manager, stuff like that, be sure to have the sim with settings that do not flatline it. Here are some shots of VSync On/Off and Unlimited on the Slider, with increasing sim features until it flatlines in the lower graph:

 

More on that from my forum help page 'P3D VSync and Performance Tuning': http://www.codelegend.com/forums/viewtopic.php?f=2&t=698&p=5762#p5762

Very well explained Steve . Thanks.

regards

Gerard

hello all

with the possibility to overclock per core on a modern bios an motherboard, with an am=245, wich core should be better to oc with a I7 7700K?

thanks

11 hours ago, SteveW said:

/B? can't remember Mark without looking up some help page on the web for that stuff. A0 is simply the Hex value 10100000=160 decimal can probably do a decimal version of the command but that line works fine with Hex as it stands simply replace app path with path of your exe and Hex value of mask required. 85=01010101 would be 55 Hex but you would leave the sim to set it's own affinity through setting the jobscheduler value AffinityMask.

Thanks Steve. How do I check that AS16 is in fact tied (using only)  those two assigned cores? I ran that .bat this morning prior to going to work and it seemed to work fine with AM=85. I wanted a way to confirm that a TaskManager doesn't show what's actually running.

 

Cheers,

Mark

Other than Task Manager details page - set affinity menu item shows current affinity in the checkboxes, I don't know of an app that does that for any process but there's probably something. The affinity of most processes is uninteresting compared to apps like P3D and FSX.