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Amazing Simple Microstutter Fix

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Just happened upon this perusing a different topic on YouTube. On my system it worked amazingly well!!! All of the microstutters I had on taxi and in the view changes are gone - CPU 0 is no longer pegged, but load is balanced across all cores. Amazing!

 

John Howell

Prepar3D V5, Windows 10 Pro, I7-9700K @ 4.6Ghz, EVGA GTX1080, 32GB Corsair Dominator 3200GHz, SanDisk Ultimate Pro 480GB SSD (OS), 2x Samsung 1TB 970 EVO M.2 (P3D), Corsair H80i V2 AIO Cooler, Fulcrum One Yoke, Samsung 34" 3440x1440 curved monitor, Honeycomb Bravo throttle quadrant, Thrustmaster TPR rudder pedals, Thrustmaster T1600M stick 

  • Replies 79
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Skeptical but I'll give that a try tomorrow sometime.😁

How is that graph accessed?

Christopher Low

AMD Ryzen 7 9800X3D CPU / 64GB DDR5-6000 RAM / 12GB Nvidia RTX 4070 Super GPU / Gigabyte X870E Aorus Elite Wifi 7 / 1+2TB Samsung Evo Plus M2 Nvme

UK2000 Beta Tester

12 minutes ago, Christopher Low said:

How is that graph accessed?

Key in Ctrl+Alt+Delete and access the Task Manager. Click on the Performance tab then right click on the CPU graph and select 'Change graph to > Logical processors'.

Edited by LecLightning56

It has the same effect on my system, Core 0 goes from 100% to  90%. Don't know about stutters because I don't haven them

Edited by willy647

AMD 7 7700X, 32GB DDR5, RTX 5060ti 16GB, 2 x Samsung 1TB NVMe, 1 x 4TB sata SSD, Windows 11 Prof

  • Commercial Member

That "tweak" has always caused my P3D to go haywire with stuttering. Strange isn't it? 🙂

Current system: ASUS PRIME Z690-P D4, Intel 12900k, 32GB RAM @ 3600mhz, Zotac RTX 3090 Trinity, M2 SSD, Oculus Quest 2.

This has been brought up on the LM forum several times over the years. LM advised against it as it would destroy the designed threading mechanism with core 0 being in charge of doing all management. 

But if it works for you without adverse affects, that's of course fine.

Kind regards, Michael

Intel i7-13700K / AsRock Z790 / Crucial 32 GB DDR 5 / ASUS RTX 4080OC 16GB / BeQuiet ATX 1000W / WD m.2 NVMe 2TB (System) / WD m.2 NVMe 4 TB (MSFS) / WD HDD 10 TB / XTOP+Saitek hardware panel /  LG 34UM95 3440 x 1440  / HP Reverb 1 (2160x2160 per eye) / Win 11

Before firing up P3D, I light up a candle. Performance increase of at least 0.002%. No kidding! Try it. 

46 minutes ago, Ricardo41 said:

Before firing up P3D, I light up a candle. Performance increase of at least 0.002%. No kidding! Try it. 

Love it! 😂

Jean-Jacques

CYND, Gatineau-Ottawa Executive Airport, Gatineau, Quebec, Canada

  • Moderator
4 hours ago, Ricardo41 said:

Before firing up P3D, I light up a candle. Performance increase of at least 0.002%. No kidding! Try it. 

Scented or unscented?  😁

 

Vic

 

RIG#1 - I9 14900K MSI Pro z790 RTX 5070Ti
40" 4K Monitor 3840x2160 

50 minutes ago, vgbaron said:

Scented or unscented?  😁

 

Vic

African or European swallow?

Rhett

7800X3D 96 GB G.Skill Flare  Gigabyte 4090  Crucial P5 Plus 2TB

  • Author
11 hours ago, Christopher Low said:

How is that graph accessed?

You can also access it using Ctrl+Shift+Esc.

John Howell

Prepar3D V5, Windows 10 Pro, I7-9700K @ 4.6Ghz, EVGA GTX1080, 32GB Corsair Dominator 3200GHz, SanDisk Ultimate Pro 480GB SSD (OS), 2x Samsung 1TB 970 EVO M.2 (P3D), Corsair H80i V2 AIO Cooler, Fulcrum One Yoke, Samsung 34" 3440x1440 curved monitor, Honeycomb Bravo throttle quadrant, Thrustmaster TPR rudder pedals, Thrustmaster T1600M stick 

  • Author
7 hours ago, Ricardo41 said:

Before firing up P3D, I light up a candle. Performance increase of at least 0.002%. No kidding! Try it. 

Can't get no respect around here...  🙂

John Howell

Prepar3D V5, Windows 10 Pro, I7-9700K @ 4.6Ghz, EVGA GTX1080, 32GB Corsair Dominator 3200GHz, SanDisk Ultimate Pro 480GB SSD (OS), 2x Samsung 1TB 970 EVO M.2 (P3D), Corsair H80i V2 AIO Cooler, Fulcrum One Yoke, Samsung 34" 3440x1440 curved monitor, Honeycomb Bravo throttle quadrant, Thrustmaster TPR rudder pedals, Thrustmaster T1600M stick 

What you're really doing with this "tweak" is tricking the OS into swapping the main thread around to balance the load across the CPU cores.  Note that this is actually *less* efficient than running the main thread on a single core, because now overhead is being incurred to swap the thread from core to core, which unnecessarily uses CPU cycles.  90% utilization on a single core turns into something like 23% across four cores...the same instruction sequence and thread blocks occur either way, so it isn't any faster or more efficient.

Think of it like cooking muffins...you can put them into the oven for 20 minutes, or you can cook them for five in your oven, go to the neighbor's house and cook them for five more there, then move down the street again...etc.  The muffins won't be done any faster, and it takes more work to keep moving them from oven to oven.

 

 

Bob Scott | President and CEO, AVSIM Inc
ATP Gulfstream II-III-IV-V

Sys1 (MSFS20+24/XPlane12+11): AMD 9800X3D, water 2x240mm, MSI MPG X670E Carbon, 64GB GSkill 6000/30, nVidia RTX4090FE
Alienware AW3821DW 38" 21:9 GSync, 2x4TB Crucial T705 PCIe5 + 2x2TB Samsung 990 SSD, EVGA 1000P2 PSU, 12.9" iPad Pro
Thrustmaster TCA Boeing Yoke, TCA Airbus Sidestick, Twin TCA Airbus Throttle quads, PFC Cirrus Pedals, Coolermaster HAF932 case

Sys2 (P3Dv5/v4): i9-13900KS, water 2x360mm, ASUS Z790 Hero, 32GB GSkill 7800MHz CAS36, ASUS RTX4090
Samsung 55" JS8500 4K TV@60Hz,
3x 2TB WD SN850X 1x 4TB Crucial P3 M.2 NVME SSD, EVGA 1600T2 PSU
Fiber link to Yamaha RX-V467 Home Theater Receiver, Polk/Klipsch 6" bookshelf speakers, Polk 12" subwoofer, 12.9" iPad Pro
PFC yoke/throttle quad/pedals with custom Hall sensor retrofit, Thermaltake View 71 case, Stream Deck XL button box

Sys3 (DCS/P3Dv4/ATS/ETS): AMD 7800X3D, MSI MPG X870E Carbon, Noctua NH-D15S, 64GB GSkill 6000/30, EVGA RTX3090
Alienware AW3420DW 34" 21:9 GSync, Corsair HX1000i PSU, 4TB Crucial T705 PCIe5 + 2TB Samsung 970Evo Plus,
TM TCA Officer Pack
, Saitek combat pedals, TM Warthog, TM RS300 FF wheel/pedals, Coolermaster HAF XB case

 

Well said!

And what I would add is that with Nvidia driver 442.19, you can limit your fps in the Nvidia Control Panel (I have mine set to 29..) and this will cut back on your Core 0 usage..

So, now I have fps set to unlimited in P3D, vsynch off, fps capped at 29 in NCP, and I get smooth flight, and average Core 0 load of 60-70%..

This with a 1080p/60Hz monitor.

Looking pretty good to me :smile:

BTW, I still have my AM set to 253 (11 11 11 01) for my quad core CPU, but not sure it makes any difference to no AM..

 

Edited by Bert Pieke

Bert

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