Eureka! I found the cure for my periodic stutterfest problem (but not the cause)

[soppie 24]

Ever since 2.3 was released I've been plagued by intermittent stutter attacks. During testing I've been cruising along at 60+ fps but every few minutes they'd drop to single figures with severe stuttering. These attacks lasted between 1 and 10 seconds before things returned to normal. I'm not a pc expert and staring at the different screens in Task Manager gave me no clue as to what was causing this.

 

Anyway, today I thought I'd try playing with the affinity settings and in TM unchecked CPU 0 and also set Priority to High. I locked frames to 33 in p3d and set off flying. 4 hours later not a single stutter and I am now confident that I've fixed an issue that was driving me nuts! I can only guess that something runs on my pc once in a while and that was interfering with my cpu in a way that manifested itself with severe stuttering. Freeing up CPU 0 presumably gives that process the power it needs. I could be miles off with that analysis but no matter, I'm just so pleased to be able to enjoy p3d 2.3 at last.

[do_denver2 18]

I was also mainly able to fix my issues, I think, by setting the priority to real time.  I had the exact problem as you, and it seems to be mostly gone.

[vonduck 99]

Hmmmm... interesting... exactly how does one change these settings?

[FLAPS15 8]

This sounds interesting, I have been banging on about micro stutters in P3D...it seems some see them some do not.

 

I will give this a try, the issue I see is the scenery is smooth then stutters then smooth...weird...still not sure though that it is linked to Vsynch problems...

 

Got to say If this is not going to get any fix or a fix can be found as much as I like P3d I will go back to FSX.

 

All the best

[harryw 0]

If setting the process priority to high or even real time cured a periodic stutter then the first thing I'd do is to check the process list for suspicious update demons or any applications that are running in the background and might download / process a significant amount of data at regular intervals.  Real time virus checking is notorious for that kind of stuff.

You could try this: while you're running P3d with process priority at normal turn off your internet (either by completely blocking every connection via firewall, turning off your router or wireless or what have you). If the stutters are gone you are one step closer to finding the culprit.  

Of course if you don't care there shouldn't be any problem at all running at high. I wouldn't go for real time because (while I really don't know how it's implemented in windows) that might lead to starvation of system processes. Probably wouldn't but there is a risk.

[GSalden 4,655]

On my pc I use Game Booster.

It shuts down processes I don't need.

So no updating in the backgrounf when running P3D.

[gboz 157]

I locked frames to 33 in p3d and set off flying. 4 hours later not a single stutter and I am now confident that I've fixed an issue that was driving me nuts!

 

Maybe it was locking frame rates to 33 instead of your 60+ that solved the problem?

 

gb.

[soppie 24]

Hi GB, I'd tried every setting permutation you can think of as well as installing and uninstalling different addons to see if they impacted these occasional bursts of severe stuttering. The only thing that made any difference was changing the affinity setting in Task Manager and, touch wood, that hasnt just reduced the severity or the frequency, its totally eliminated them. Part of me wants to get to the bottom of the issue but I havent the necessary skills. I am intrigued by the suggestion above to disconnect from the internet but I think I'll resist and just get on with flying.

[spirit_66 2]

Setting the process priority to "real time" gave me sound problems within P3D v2 but setting it to "high" is fine.

Spirit

 

Hmmmm... interesting... exactly how does one change these settings?
 

 

AM and priority can be set in Task Manager. AM can be set in cfg-file too. The priority can be set when starting P3D v2 with this

C:\Windows\System32\cmd.exe /c start "Prepar3d v2" /High "E:\Lockheed Martin\Prepar3D v2\prepar3d.exe"

Use a shortcut doing so.

Spirit

[N1G 88]

Yes that does work but on some machines/os's, it can affect addons. I had problems with my controls and saitek panels. This was before I moved to win 7. Maybe I will try again.

 

Bob

[spirit_66 2]

Yes that does work but on some machines/os's, it can affect addons. I had problems with my controls and saitek panels. This was before I moved to win 7. Maybe I will try again.

 

Bob

Hi Bob,

works well here on Windows 8.1 and with Logitech G940 controls but I always use FSUIPC4 to connect them.

Spirit

[JLuis 409]

Hi! Soppie,

 

For me didn't fix... I continue having intermittent stutter attacks in my p3d v2.3. I tried to fix like you and I tried to use game booster like GSalden and nothing.

 

I don't know how to fix this.

 

I think that I will wait the v2.4 for fly again.

 

Best Regards,

JL :( 

[gboz 157]

Hi! Soppie,

 

For me didn't fix... I continue having intermittent stutter attacks in my p3d v2.3. I tried to fix like you and I tried to use game booster like GSalden and nothing.

 

I don't know how to fix this.

 

I think that I will wait the v2.4 for fly again.

 

Best Regards,

JL :( 

Don't be surprised, LM is still adamant that all cores should be used, (last I heard).

 

gb.

[spirit_66 2]

 

 

I think that I will wait the v2.4 for fly again.

Why do you think P3D v2.4 will solve your problem?

Spirit

[JLuis 409]

Why do you think P3D v2.4 will solve your problem?

Spirit

 

I am expecting that LM will solve, because many people have this problem. I hope that will be fit it in v2.4.

 

JL