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CL_DEVICE_NOT_AVAILABLE on GCP Xeon CPU - Printable Version

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CL_DEVICE_NOT_AVAILABLE on GCP Xeon CPU - albert4 - 06-22-2022

Linux newbie here - could you kindly guide me to make hashcat works on GCP e2 instance (2 vCPU, no GPU, OS Debian) - which package should I install ? (i know it will be slow without GPU).
OpenCL seems to be already installed.
Considering error "clCreateContext(): CL_DEVICE_NOT_AVAILABLE"

Code:
:~/hashcat-6.2.5$ ./hashcat.bin -I hashcat (v6.2.5) starting in backend information mode clCreateContext(): CL_DEVICE_NOT_AVAILABLE OpenCL Info: ============ OpenCL Platform ID #1   Vendor..: Intel(R) Corporation   Name....: Intel(R) CPU Runtime for OpenCL(TM) Applications   Version.: OpenCL 2.1 LINUX   Backend Device ID #1     Type...........: CPU     Vendor.ID......: 8     Vendor.........: Intel(R) Corporation     Name...........: Intel(R) Xeon(R) CPU @ 2.20GHz     Version........: OpenCL 2.1 (Build 0)     Processor(s)...: 2     Clock..........: 2200     Memory.Total...: 975 MB (limited to 121 MB allocatable in one block)     Memory.Free....: 0 MB     OpenCL.Version.: OpenCL C 2.0     Driver.Version.: 18.1.0.0920

Code:
:~/hashcat-6.2.5$ ./hashcat.bin -b -m 0 hashcat (v6.2.5) starting in benchmark mode clCreateContext(): CL_DEVICE_NOT_AVAILABLE OpenCL API (OpenCL 2.1 LINUX) - Platform #1 [Intel(R) Corporation] ========================================================= * Device #1: Intel(R) Xeon(R) CPU @ 2.20GHz, skipped Benchmark relevant options: =========================== * --optimized-kernel-enable ------------------- * Hash-Mode 0 (MD5) ------------------- Started: Wed Jun 15 13:47:52 2022 Stopped: Wed Jun 15 13:48:16 2022

Thanks a lot.

RE: CL_DEVICE_NOT_AVAILABLE on GCP Xeon CPU - Snoopy - 06-23-2022

* Device #1: Intel(R) Xeon(R) CPU @ 2.20GHz, skipped

hahscat is skipping CPU by default

you will need to add option 
Code:
-D1 -d1
to tell hashcat to use CPU

RE: CL_DEVICE_NOT_AVAILABLE on GCP Xeon CPU - albert4 - 06-25-2022

Thanks, but it gives the same result - skipped :

Code:
$ ./hashcat.bin -D1 -d1 -b -m0 hashcat (v6.2.5) starting in benchmark mode clCreateContext(): CL_DEVICE_NOT_AVAILABLE OpenCL API (OpenCL 2.1 LINUX) - Platform #1 [Intel(R) Corporation] ================================================================== * Device #1: Intel(R) Xeon(R) CPU @ 2.20GHz, skipped Benchmark relevant options: =========================== * --backend-devices=1 * --opencl-device-types=1 * --optimized-kernel-enable ------------------- * Hash-Mode 0 (MD5) ------------------- Started: Sat Jun 25 11:24:15 2022 Stopped: Sat Jun 25 11:24:18 2022


RE: CL_DEVICE_NOT_AVAILABLE on GCP Xeon CPU - marc1n - 06-25-2022

Only -D1 not -D1 -d1 Smile

RE: CL_DEVICE_NOT_AVAILABLE on GCP Xeon CPU - albert4 - 06-25-2022

Same result :

Code:
$ ./hashcat.bin -D 1 -b -m0 hashcat (v6.2.5) starting in benchmark mode clCreateContext(): CL_DEVICE_NOT_AVAILABLE OpenCL API (OpenCL 2.1 LINUX) - Platform #1 [Intel(R) Corporation] ================================================================== * Device #1: Intel(R) Xeon(R) CPU @ 2.20GHz, skipped


RE: CL_DEVICE_NOT_AVAILABLE on GCP Xeon CPU - marc1n - 06-25-2022

See that you have

Memory.Total...: 975 MB (limited to 121 MB allocatable in one block)
Memory.Free....: 0 MB

your instance has no memory to run...

RE: CL_DEVICE_NOT_AVAILABLE on GCP Xeon CPU - albert4 - 06-26-2022

Good point.
Code:
$ grep Mem /proc/meminfo MemTotal: 998768 kB MemFree: 520656 kB MemAvailable: 616156 kB

Any hints why hashcat finds MemFree = 0 Mb whereas real MemFree is around 520 Mb ?

RE: CL_DEVICE_NOT_AVAILABLE on GCP Xeon CPU - marc1n - 06-26-2022

(06-26-2022, 02:03 PM)albert4 Wrote: Good point.
Code:
$ grep Mem /proc/meminfo MemTotal:        998768 kB MemFree:          520656 kB MemAvailable:    616156 kB

Any hints why hashcat finds MemFree = 0 Mb whereas real MemFree is around 520 Mb ?

You can't run everything on 1GB it's not those times Smile You have too little memory as I already wrote...

RE: CL_DEVICE_NOT_AVAILABLE on GCP Xeon CPU - Snoopy - 06-28-2022

didnt spot the memory = 0

i guess this is a small (free) vps?, these virtual machines are not made for loving you baby, i mean hashcat, if you dont have the option to get more ram for free, try using hashcat on your pc at home

@ Marc1n, -D1 -d1 is also right in this context, depending on the settings and driverconfiguration the cpu could be shown more than once, i have a workstation with 2* xeon working, when just using option -D1 (CPU -only)

Code:
hashcat -m0 -b -D1 Speed.#1.........:  905.1 MH/s (51.60ms) @ Accel:1024 Loops:1024 Thr:1 Vec:8 Speed.#2.........:  980.8 MH/s (50.03ms) @ Accel:1024 Loops:1024 Thr:1 Vec:8 Speed.#*.........:  1885.9 MH/s

Code:
hashcat -m0 -b -D1 -d1 Speed.#1.........:  1844.6 MH/s (13.28ms) @ Accel:1024 Loops:512 Thr:1 Vec:8

as you can see, -D1 -d1 sticks to one possibiliy how the CPU is utilized, but same overall speed (i think this is better thna using 2 different ways how hahscat talks to the CPU