mfakto: an OpenCL program for Mersenne prefactoring - Page 146

kracker · 2020-03-30, 18:36

mfakto has often been a pain to use with multiple gpu's... it is somehow connected with the output of clinfo(don't exactly know how)... something like -d 10/11 etc might work.
Honestly, mfakto needs a lot of changes - it would be nice if the system gpuowl uses to detect gpu's were implemented here - although that requires code changes and it may be completely different from what mfakto needs and not work... also automatic kernel tuning and selection is needed, which would remove the need of users testing it themselves and adding to the code...

kriesel · 2020-03-31, 05:23

Quote:

Originally Posted by rebirther

Doesnt work

Needs the right parameters. I run mfakto as follows on multi-gpu systems:

Code:

set gpuappinstance=mfakto-RX550
:set gpuappinstance=mfakto-RX480

mfakto -d 02 >>mfakto.txt

echo At %date% %time% %computername% %gpuappinstance% exited >>\\wdmycloud\ken\sources\mersennes\appwatch\%computername%-%gpuappinstance%.txt
set gpuappinstance=
goto exit

:all the following put mfakto activity on gpu 0:
: 00 01 1 
: this puts it on gpu 1: 02
: this puts it on gpu 2 (the third) 03
:exit

OpenCl supports multiple platforms (eg Intel, AMD, NVIDIA) and multiple devices per platform. First digit is platform, second is device per platform. It's in the help output from the program.

DeleteNull · 2020-04-02, 16:37

Hello,

I should post this:
Unknown GPU name, assuming GCN. Please post the device name "gfx1012 (Advanced Micro Devices, Inc.)"

(error message when doing the self test)

dannyridel · 2020-04-03, 13:15

Same thing with gfx902, which is Vega 8 iGPU, but the error message does no harm

rebirther · 2020-04-04, 21:05

We are running into an issue with the mfakto_Kernels.elf file. (v0.15pre6)

http://srbase.my-firewall.org/sr5/fo...27&postid=6025

I have tried this on my 5500XT and its working, on the 5700XT not. Any ideas how to fix this?

Some more errors seen like this:
Loading binary kernel file mfakto_Kernels.elf

Cannot use binary kernel: its build options (-I. -DVECTOR_SIZE=2 -DGCN -O3 -DMORE_CLASSES -DCL_GPU_SIEVE) are different than the current build options (-I. -DVECTOR_SIZE=2 -DVLIW5 -O3 -DMORE_CLASSES -DCL_GPU_SIEVE). Rebuilding kernels.
Compiling kernels.

chalsall · 2020-04-05, 22:08

Quote:

Originally Posted by rebirther

We are running into an issue with the mfakto_Kernels.elf file. (v0.15pre6)

http://srbase.my-firewall.org/sr5/fo...27&postid=6025

I have tried this on my 5500XT and its working, on the 5700XT not. Any ideas how to fix this?

Could anyone help Reb with this issue?

I don't have any OpenCL kit -- I'm an Nvidia guy. And I don't know of any cloud providers which offer access to AMD cards by way of instances.

James Heinrich · 2020-04-05, 22:34

I have an RX 480, but no insight, since it works fine here (as it does on his 5500XT).

kracker · 2020-04-08, 20:47

Going to try to add "support"(bandaid fix is the best term) for newer GPU's... Could I have the output from --perftest for any relatively new GPU's? (Radeon VII, any vega(RX Vega, RX 5xxx etc.

ixfd64 · 2020-04-08, 22:33

Quote:

Originally Posted by rebirther

We are running into an issue with the mfakto_Kernels.elf file. (v0.15pre6)

http://srbase.my-firewall.org/sr5/fo...27&postid=6025

I have tried this on my 5500XT and its working, on the 5700XT not. Any ideas how to fix this?

Some more errors seen like this:
Loading binary kernel file mfakto_Kernels.elf

Cannot use binary kernel: its build options (-I. -DVECTOR_SIZE=2 -DGCN -O3 -DMORE_CLASSES -DCL_GPU_SIEVE) are different than the current build options (-I. -DVECTOR_SIZE=2 -DVLIW5 -O3 -DMORE_CLASSES -DCL_GPU_SIEVE). Rebuilding kernels.
Compiling kernels.

The official mfakto binary hasn't been updated in several years. Can you clone the repository and try to build from the code?

ixfd64 · 2020-05-05, 23:04

Hey everyone, mfakto 0.15pre7 is now available on GitHub. Here are the changes:

kracker has added preliminary support for newer architectures up to RDNA
Some compiler warnings have been fixed
mfakto should compile out of the box in Microsoft Visual Studio
Of course, more documentation updates

Please note that I wasn't able to test the latest code on the Mac Pro at my office due to the COVID-19 pandemic. Feel free to slap me with a trout if I broke anything.

James Heinrich · 2020-05-06, 00:37

Quote:

Originally Posted by ixfd64

Hey everyone, mfakto 0.15pre7 is now available on GitHub. Here are the changes

Could you perchance provide a link?

2020-04-02, 16:37	#1598
DeleteNull Mar 2017 Germany, Wolfsburg 3 Posts	Radeon 5500 XT fails in self test. Hello, I should post this: Unknown GPU name, assuming GCN. Please post the device name "gfx1012 (Advanced Micro Devices, Inc.)" (error message when doing the self test)

2020-04-04, 21:05	#1600
rebirther Sep 2011 Germany 2²×3²×79 Posts	We are running into an issue with the mfakto_Kernels.elf file. (v0.15pre6) http://srbase.my-firewall.org/sr5/fo...27&postid=6025 I have tried this on my 5500XT and its working, on the 5700XT not. Any ideas how to fix this? Some more errors seen like this: Loading binary kernel file mfakto_Kernels.elf Cannot use binary kernel: its build options (-I. -DVECTOR_SIZE=2 -DGCN -O3 -DMORE_CLASSES -DCL_GPU_SIEVE) are different than the current build options (-I. -DVECTOR_SIZE=2 -DVLIW5 -O3 -DMORE_CLASSES -DCL_GPU_SIEVE). Rebuilding kernels. Compiling kernels. Last fiddled with by rebirther on 2020-04-04 at 21:09

2020-05-05, 23:04	#1605
ixfd64 Bemusing Prompter "Danny" Dec 2002 California 2390₁₀ Posts	Hey everyone, mfakto 0.15pre7 is now available on GitHub. Here are the changes: kracker has added preliminary support for newer architectures up to RDNA Some compiler warnings have been fixed mfakto should compile out of the box in Microsoft Visual Studio Of course, more documentation updates Please note that I wasn't able to test the latest code on the Mac Pro at my office due to the COVID-19 pandemic. Feel free to slap me with a trout if I broke anything. Last fiddled with by ixfd64 on 2020-05-05 at 23:05

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2020-03-30, 18:36	#1596
kracker "Mr. Meeseeks" Jan 2012 California, USA 2³·271 Posts	mfakto has often been a pain to use with multiple gpu's... it is somehow connected with the output of clinfo(don't exactly know how)... something like -d 10/11 etc might work. Honestly, mfakto needs a lot of changes - it would be nice if the system gpuowl uses to detect gpu's were implemented here - although that requires code changes and it may be completely different from what mfakto needs and not work... also automatic kernel tuning and selection is needed, which would remove the need of users testing it themselves and adding to the code...

2020-04-03, 13:15	#1599
dannyridel "AMD YES!" Jan 2020 Bellevue, WA 2·5² Posts	Same thing with gfx902, which is Vega 8 iGPU, but the error message does no harm

2020-04-05, 22:34	#1602
James Heinrich "James Heinrich" May 2004 ex-Northern Ontario 3×5×227 Posts	I have an RX 480, but no insight, since it works fine here (as it does on his 5500XT).

2020-04-08, 20:47	#1603
kracker "Mr. Meeseeks" Jan 2012 California, USA 4170₈ Posts	Going to try to add "support"(bandaid fix is the best term) for newer GPU's... Could I have the output from --perftest for any relatively new GPU's? (Radeon VII, any vega(RX Vega, RX 5xxx etc.