P3D affinity mask?

[Poppet 703]

 

 

We are talking about the AM, not 'tweaking'. If you have HT enabled then you need an AM with P3D and FSX.

Steve, as your in a giving mode could i be as cheeky and ask what mine is.   I fly P3D I have an i7-3930k 3.2 clocked up to 4, with HT on so ive got 12 running cores.  I tried working out what it was before and i think i ended up with nearly 8 thousand and something  

[SteveW 1,792]

Remember that the overall setup of the sim can possibly mean that a % improvement available in the main thread throughput may not necessarily allow the sim to perform better, why the does-nothing/improves-everything arguments start.

 

I would try 1016=(00,11,11,11,10,00), how things work out finally depends on what's running before and after but everythings got a good chance to flow with an AM equating to 4 HT enabled cores with the first LP masked.

[SteveW 1,792]

 

In the top half image above, although it shows around 8% up on throughput, was only 3% up on fps. However, an fps graph showed less chopping as the scenery changed, producing a shorter line overall.

[Poppet 703]

Great Steve, thank you.  I was just looking in my Prepar3d.cfg file,  do i just pop it on the top somewhere and save,  or do i put it in a specific position in the list 

 

[JOBSCHEDULER]
AffinityMask=1016 

[SteveW 1,792]

That's it, anywhere will do as long as it's not mid way into another section - make it the top slot is easy.

[Richard Sennett 2,499]

Also sometimes if P3D does not like its location the edit will be re-located in cfg file automatically 

[Augustin320214 4]

The i5-4200M is a dual core processor with hyperthreading. HT is recommended, so with HT enabled you have 4 logical processors. However, you will want the first P3D thread to use a core to itself so the recommended AM=14=(11,10) moves the second P3D thread onto the next core. With HT=Off don't use an AM.

So what AM should I set now? My HT is on so...

BTW, thanks for all the replies!

[Richard Sennett 2,499]

If you have four core cpu then 84 should do it

[Augustin320214 4]

If you have four core cpu then 84 should do it

I have dual core with hyperthreading (4 logical threads)

[SteveW 1,792]

I have dual core with hyperthreading (4 logical threads)

Not much you can do other than AM=14 or AM=0.

[Richard Sennett 2,499]

Try 84 and 14 as I have and 84 works a treat for me - real happy but with changes from that youtube video I posted here 

 

http://forum.avsim.net/topic/472704-p3d-4-core-users-check-this-out/#entry3277813

[Augustin320214 4]

Not much you can do other than AM=14 or AM=0.

This may sound stupid, but what does AM=0 actually do?

[Poppet 703]

Ok thank you Steve,  i tried both and yes i can see the weight shifting from core 1 around to the different cores,  early stages yet,  i will report back.  Thank you :rolleyes:  

[SteveW 1,792]

Augustin320214, on 03 Aug 2015 - 8:08 PM, said:

This may sound stupid, but what does AM=0 actually do?

Good question. It means setting all the bits representing all the cores/LPs to one (1) in the AM. So if you have 2 cores AM=0 same as AM=3=(11), for 2 cores HT=On=4LPs AM=0 same as AM=15=(11,11), for 6 core HT=On=12 LPs AM=0 same as AM=4095=(11,11,11,11,11,11). So it's the default all cores on value no matter how many cores/LPs.

[Augustin320214 4]

Good question. It means setting all the bits representing all the cores/LPs to one (1) in the AM. So if you have 2 cores AM=0 same as AM=3=(11), for 2 cores HT=On=4LPs AM=0 same as AM=15=(11,11), for 6 core HT=On=12 LPs AM=0 same as AM=4095=(11,11,11,11,11,11). So it's the default all cores on value no matter how many cores/LPs.

Ok thanks for your help, I'm using AM=15 now and the stutter is actually not that bad, I was just wondering why AM=14 is VERY smooth (15 is NORMAL smooth) and why my ground textures load so slowly with AM=14.