Hashcat CPU vs GPU - Linux vs Windows

[Jacek]

Hello everyone - I am sorry my English is poor so I help myself through Google Translator
I have AMD Threadripper x1950 + GTX 1080TI + 64Gb RAM
System - 1 - Windows 10 64BIT on the NVME Samsung SSD
System - 2 - Linux 64BIT on a SATA drive

System - 2 - The-Distribution-Which-Does-Not-Handle-OpenCL-Well (Kali) LINUX

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Questions:

   1. how to compile Hashcat to use my hardware more efficiently (RAM, CPU)
- NVIDIA GPUs perform better on Windows
- AMD CPU better results under Linux (after installing Intel OpenCL drivers !!!)
- differences are the fault of the system, architecture or drivers?
 
  2. How to force the AMD Threadripper CPU to help GPU GTX 1080TI in password cracking?
- support by PP64, KWP64, others?
  3. OpenCL-INTEL (CPU) driver works better than original AMD under Windows? magic or a weak joke?
  4. How does Hashcat use memory access? memory access: NUMA (local) or UMA (distributed)?
  5. Does Hashcat use multi-core processors or does it leave it to the operating system?

I have narrowed down the tests to (Hashmode: 2500 - WPA-EAPOL-PBKDF2) to make my post more readable, I can paste everything if there's a need
 
Thank you for your help
  
=========================== TEST =============================

The-Distribution-Which-Does-Not-Handle-OpenCL-Well (Kali) LINUX OpenCL Pocl Project (default OpenCL)
OpenCL Platform #1: The pocl project (hashcat -b -m 2500 -O)
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* Device #1: pthread-AMD Ryzen Threadripper 1950X 16-Core Processor, 16384/62315 MB allocatable, 32MCU
Benchmark relevant options:
===========================
* --optimized-kernel-enable
Hashmode: 2500 - WPA-EAPOL-PBKDF2 (Iterations: 4096)
Speed.#1.........:    10639 H/s (47.92ms) @ Accel:512 Loops:128 Thr:1 Vec:8

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 The-Distribution-Which-Does-Not-Handle-OpenCL-Well (Kali) LINUX OpenCL INTEL  ( Hashcat -b -w 4 -O)
OpenCL Platform #1: Intel(R) Corporation
========================================
* Device #1: AMD Ryzen Threadripper 1950X 16-Core Processor, 16090/64363 MB allocatable, 32MCU
Benchmark relevant options:
===========================
* --opencl-device-types=1
* --optimized-kernel-enable
* --workload-profile=4

Hashmode: 2500 - WPA-EAPOL-PBKDF2 (Iterations: 4095)
Speed.#1.........:    27400 H/s (298.06ms) @ Accel:1024 Loops:1024 Thr:1 Vec:8

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Windows10 - PowerShell - ADMIN
PS C:\Hashcat> .\hashcat64 -b -w 4 -D 1 -O
hashcat (v5.1.0) starting in benchmark mode...
OpenCL Platform #1: NVIDIA Corporation
======================================
* Device #1: GeForce GTX 1080 Ti, skipped.
OpenCL Platform #2: Advanced Micro Devices, Inc.
================================================
* Device #2: AMD Ryzen Threadripper 1950X 16-Core Processor, 16358/65432 MB allocatable, 32MCU
Benchmark relevant options:
===========================
* --opencl-device-types=1
* --optimized-kernel-enable
* --workload-profile=4
Hashmode: 2500 - WPA-EAPOL-PBKDF2 (Iterations: 4096)
Speed.#2.........:    25218 H/s (323.83ms) @ Accel:1024 Loops:1024 Thr:1 Vec:4

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GPU + CPU (Windows)
PS C:\Hashcat> .\hashcat64 -b -w 4 -D 1,2 -O
hashcat (v5.1.0) starting in benchmark mode...
OpenCL Platform #1: NVIDIA Corporation
======================================
* Device #1: GeForce GTX 1080 Ti, 2816/11264 MB allocatable, 28MCU
OpenCL Platform #2: Advanced Micro Devices, Inc.
================================================
* Device #2: AMD Ryzen Threadripper 1950X 16-Core Processor, 16358/65432 MB allocatable, 32MCU
Benchmark relevant options:
===========================
* --opencl-device-types=1,2
* --optimized-kernel-enable
* --workload-profile=4

Hashmode: 2500 - WPA-EAPOL-PBKDF2 (Iterations: 4096)
Speed.#1.........:   637.9 kH/s (352.74ms) @ Accel:128 Loops:256 Thr:1024 Vec:1
Speed.#2.........:    22154 H/s (368.57ms) @ Accel:1024 Loops:1024 Thr:1 Vec:4
Speed.#*.........:   660.1 kH/s

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GPU + CPU  (Linux + Intel OpenCL)
root@jacek:~# sudo hashcat -b -w 4 -D 1,2 -O
hashcat (v5.1.0-811-g5cddf527) starting in benchmark mode...
OpenCL Platform #1: Intel(R) Corporation
========================================
* Device #1: AMD Ryzen Threadripper 1950X 16-Core Processor, 16090/64363 MB allocatable, 32MCU
OpenCL Platform #2: NVIDIA Corporation
======================================
* Device #2: GeForce GTX 1080 Ti, 2793/11175 MB allocatable, 28MCU
Benchmark relevant options:
===========================
* --opencl-device-types=1,2
* --optimized-kernel-enable
* --workload-profile=4
Hashmode: 2500 - WPA-EAPOL-PBKDF2 (Iterations: 4095)
Speed.#1.........:    27142 H/s (301.02ms) @ Accel:1024 Loops:1024 Thr:1 Vec:8
Speed.#2.........:   579.6 kH/s (393.31ms) @ Accel:1024 Loops:1024 Thr:32 Vec:1
Speed.#*.........:   606.8 kH/s

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