x264 Encoding with MeGUI on 32 Cores System

[defalopii]

Just make comparison between using standard Avisynth with Avisynth 2.6 MT on MeGUI

What i used:
* Dual AMD Opteron 6272 with Total 32 Cores
* RAM 16GB
* Video Source 1920x1080p, total duration 30mn 2s
* MeGUI 2112
* x264 v2200
* x264 Setting:

program --preset fast --pass 2 --bitrate 5000 --stats ".stats" --threads 16 --deblock -1:-1 --b-adapt 2 --ref 3 --weightp 2 --qpmin 10 --qpmax 51 --chroma-qp-offset -2 --rc-lookahead 60 --merange 32 --me umh --direct auto --subme 9 --trellis 2 --psy-rd 0.00:0 --no-fast-pskip --output "output" "input"

1. Standard Avisynth, no filter etc, very standard script:

DirectShowSource("D:\Sample.645782-algrm.mkv", fps=23.976, audio=false, convertfps=true).AssumeFPS(24000,1001)

Result:
1st pass: 10.95 FPS
2nd pass: 14.97 FPS
Threads: 40
Encoding Speed: Start 9:32:37 Finish 11:26:33 its about 2 hours
CPU Usage 1st pass: 5% - 10%
CPU Usage 2nd pass: 20% - 30%

2. With Avisynth 2.6 MT:
Avisynth Script

SetMemoryMax(15000)
SetMTMode(3, 8)
DirectShowSource("D:\Sample.645782-algrm.mkv", fps=23.976, audio=false, convertfps=true).AssumeFPS(24000,1001)

Result:
1st pass: 11.28 FPS
2nd pass: 15.28 FPS
Threads: 64
Encoding Speed: Start 11:55:33 Finish 01:54:14 its about 2 hours
CPU Usage 1st pass: 7% - 13%
CPU Usage 2nd pass: 21% - 35%

No significant improvement. This is probably the maximum of MT. Have tried mode 1 to 6. For me, mode 3 is the best, other even worst than not using MT. Also tried adjust the threads from 2 to 32. 8 is good choice, values ​​above it will crashed. I dont know its MeGUI problem or the the Avisynth 2.6 MT or x264 it self.

3. Now see when i splitted the video source into 10 parts than encode it simultaneously.
This is No MT, just standard Avisynth.





Result:
1st pass: See screenshot
2nd pass: See screenshot
Threads: 40 per x264 process
Encoding Speed: Start 10:17:16 Finish 10:39:38 its about 20 Minutes
CPU Usage 1st pass: 60% - 80%
CPU Usage 2nd pass: 100%

It was awesome...!!!
See how the Encoding Speed increase 6x more faster.
CPU Usage on 1st pass also increase. More parts means the more u can utilize the CPU usage up to 100%.

This is maybe good idea for developer of MeGUI or Avisynth 2.6 MT or x264 rather than playing with frames/threads

Any opinion guys...