P3D and hyperthreading

[SteveW 1,792]

For example, with the 6 core 12 LP CPU we could use 4064=(11,11,11,10,00,00) which would allocate 4 cores and keep the secondary threads off the primary thread core. 4094=(11,11,11,11,11,10) would allocate 6 cores, maybe more than needed.

[GSalden 4,655]

Here 3392 with HT on. CPU 5820K ( 6 core ).

That's what I used after I read a lot of what Steve explained.

 

I can assign my addon programs to LP's.

 

http://forum.avsim.net/topic/465421-intel-hyper-threading-on-or-off/?p=3211519

 

Here how it looks :

 

[Peter Webber 339]

Hi Steve.

I have read a lot of you posts related to hyperthreading and have used your advice with success. I just seem to recall in previous discussions you advised on not using hyperthreading and if hyperthreading cannot be disabled in BIOS then the use an appropriate affinity mask...I have a 4 core CPU with hyperthreading and you suggested to not use hyperthreading or to use a mask of 84 or 164? A bit confused now..

 

Regards,

[SteveW 1,792]

I've always said use HT on. Unless possibly when pushing for ultimate Overclocking, where so it is said to disable the HT runs the core cooler for a given frequency. That's another debate, because HT improves task switching and there's much more than just the major sim threads running to support the sim.

 

Peter, on the 4 core 8LP CPU you say 84 or 164, both provide 3 LPs from separate cores, which is good. Other AMs to consider might be 248, or 254 which increase the utilisation of cores with secondary threads.

 

Don't forget that applying an AM can only partition the CPU by shutting out some cores to the app, and remember that essentially, all the subsystems running under the sim run in that partition.

[Peter Webber 339]

Thanks....will try them out.