Hyper-Threading ON or OFF ???

[somiller 694]

2 hours ago, w6kd said:

My last quad-core was a 7700K, and I found that HT on with an affinity mask of 245 worked well.  That keeps core 0 and 1 confined to a single virtual CPU, and allows texture loading etc on both virtual CPUs on cores 2-3.

But yes, system and configuration dependent.  YMMV

Regards

I did a test with NO affinity mask; AM 253; AM 245 and found AM 245 provided the fewest long frames (using FRAPS to graph frametime performance). I run a similar system,  except you are obviously running a more robust GPU. As Bert indicated above, AM is not as important with P3Dv4.4 as it used to be in previous builds, but AM 245 does provide me fewer long frames.

Kind Regards,

[vgbaron 3,627]

Folks - I'm going to shut this down. Search this forum and you will find many different threads with the same topic - all resulting in the same thing - it is system specific and there is NO hard rule.

I think this topic has been done to death.

Vic

[DaveCT2003 1,820]

1 hour ago, Bert Pieke said:

Dave, that is certainly true, but LM is continuing to develop/change P3D, with each release behaving differently from the previous.. so I would caution folks against taking the "old wisdom" and applying it to V4.4. 

We will have to agree to disagree on that my friend.  As it stands now, I see absoltuely nothing that has changed in so far as the HT advice I've been providing for years, which in a nutshell is "Don't use the AF tweak in P3Dv4+ unless you have a specific system need to run it".  My good friend Rob agrees with this, and we've not only tested this to death on our systems but several hundred customer computers as well.  P3D is not FSX, and this tweak often causes more problems than when people apply it because the really aren't aware of what they're changing.  In fact, I've found the vast majority (I'm in the 90 percentile range) really don't have any clue what they're doing with this tweak and I get this from talking directly with customers as well as working on their systems.  This is precisely why one of the most asked questions in flight sim is somethign akin to either "is 84 still good on my new system with 8 cores" to "what value do I use". 

Now, I know Bert (whom I have an immense level of respect for) is keenly aware of how to use AF, but I'll argue until I'm blue in the face that AF is just not needed (at all) unless you're running some non-P3D software (on the same computer) that requires additional bandwidth OR you're flying on a low end system and you purposely want to send processing threads to increase throughput.  At least that's my advice as a former hardware computer engineer. 

Best wishes everyone!