mfakto: an OpenCL program for Mersenne prefactoring - Page 94

henryzz · 2014-03-30, 17:46

Your cpu's graphics(HD 2500) are comparable to my 8600GTS. I don't run anything on it as it is so slow.
The next generation(HD 4000) has much better performance.
Mine is single precision only. I assume that yours has double precision support.
Almost all of the gpus NVidia sells currently have higher performance.

ET_ · 2014-03-30, 18:48

Quote:

Originally Posted by henryzz

Your cpu's graphics(HD 2500) are comparable to my 8600GTS. I don't run anything on it as it is so slow.
The next generation(HD 4000) has much better performance.
Mine is single precision only. I assume that yours has double precision support.
Almost all of the gpus NVidia sells currently have higher performance.

Thanks Henry, the problem is that actually I have no Nvidia GPU on my PCs...

Luigi

Bdot · 2014-03-30, 21:12

I just posted the Linux version, basically untested (will test tomorrow).

But you could give it a try. "mfakto-pi" is the "PerformanceInfo" version that measures each kernel's run time. _x32 and _x64 are the normal, optimized versions.

Try playing around with these mfakto.ini parameters to see if any combination works:
VectorSize
SieveOnGPU
GPUType

Depending on the errors you'll encounter, other settings may be needed too.

I agree that the GIMPS contribution in terms of GHz-days will be rather limited. But isn't getting the achievement "First to run mfakto on Intel GPU" something to be proud of

? I think we're closing in on it ...

Bdot · 2014-03-30, 21:18

Quote:

Originally Posted by ET_

Here is my OpenCL system:

Code:

  1 devices found supporting OpenCL on: Intel(R) OpenCL

 ----------------------------------
 Device         Intel(R) Pentium(R) CPU G2030 @ 3.00GHz
 ---------------------------------
  CL_DEVICE_TYPE:            CL_DEVICE_TYPE_CPU

Oh, I just noticed, that the OpenCL system did not yet recognize your GPU. What is listed here, is the CPU (I'm quite certain that mfakto will run on that).

Making the GPU show up in the list may need additional effort (drivers/BIOS/hacks/whatever) ... that is something that the Intel forums should be able to provide help for.

Prime95 · 2014-03-30, 23:28

Last I looked, Intel only has Windows drivers for OpenCL support. The forums indicated Linux support was not on the horizon.

Bdot · 2014-03-31, 07:28

Hmm, I did not think any company could still run that strategy ...

Well, ET_, this means your system won't run mfakto on the Intel GPU anytime soon ...

ET_ · 2014-03-31, 10:00

Quote:

Originally Posted by Bdot

Hmm, I did not think any company could still run that strategy ...

Well, ET_, this means your system won't run mfakto on the Intel GPU anytime soon ...

Thank you for your effort and hints

I'll stay on doublemersennes project for now.

Luigi

Bdot · 2014-03-31, 18:44

Did anyone try the 0.14pre4 version on Intel HD yet (obviously only on win)? Did anything change compared to 0.13?

Is anyone besides kracker testing 0.14pre4 at all?

gjmccrac · 2014-03-31, 22:57

I am trying it and it seems to be working.

Windows 8.1
AMD Radeon HD 8470 (Device 6778)

Catalyst Version 13.12

Axelsson · 2014-04-04, 03:15

I've tested on my AMD Radeon HD 6970

Code:

OpenCL device info
  name                      Cayman (Advanced Micro Devices, Inc.)
  device (driver) version   OpenCL 1.2 AMD-APP (1124.2) (1124.2 (VM))
  maximum threads per block 256
  maximum threads per grid  16777216
  number of multiprocessors 24 (1536 compute elements)
  clock rate                880MHz

Code:

Selftest statistics
  number of tests           287351
  successful tests          287351

selftest PASSED!

Axelsson · 2014-04-11, 01:42

New test, now on an AMD Radeon HD 6950 and under Linux (Linux version 3.2.0-4-686-pae Debian 3.2.54-2)

Code:

OpenCL device info
  name                      Cayman (Advanced Micro Devices, Inc.)
  device (driver) version   OpenCL 1.2 AMD-APP (938.2) (CAL 1.4.1741)
  maximum threads per block 256
  maximum threads per grid  16777216
  number of multiprocessors 22 (1408 compute elements)
  clock rate                800MHz

Code:

Selftest statistics                                    
  number of tests           287351
  successful tests          287351

selftest PASSED!

Some lagging on the screen when running faster assignments. The screen froze for half a second every update to the console. The strange thing is that it seems to have disappeared when I changed "PrintMode=1" to avoid scrolling.
It could be some other thing too as this is the first time I'm running mfakto under linux.

2014-03-30, 17:46	#1024
henryzz Just call me Henry "David" Sep 2007 Cambridge (GMT/BST) 2·3³·109 Posts	Your cpu's graphics(HD 2500) are comparable to my 8600GTS. I don't run anything on it as it is so slow. The next generation(HD 4000) has much better performance. Mine is single precision only. I assume that yours has double precision support. Almost all of the gpus NVidia sells currently have higher performance. Last fiddled with by henryzz on 2014-03-30 at 17:51

2014-04-11, 01:42	#1034
Axelsson Jul 2012 Sweden 2×3×7 Posts	New test, now on an AMD Radeon HD 6950 and under Linux (Linux version 3.2.0-4-686-pae Debian 3.2.54-2) Code: OpenCL device info name Cayman (Advanced Micro Devices, Inc.) device (driver) version OpenCL 1.2 AMD-APP (938.2) (CAL 1.4.1741) maximum threads per block 256 maximum threads per grid 16777216 number of multiprocessors 22 (1408 compute elements) clock rate 800MHz Code: Selftest statistics number of tests 287351 successful tests 287351 selftest PASSED! Some lagging on the screen when running faster assignments. The screen froze for half a second every update to the console. The strange thing is that it seems to have disappeared when I changed "PrintMode=1" to avoid scrolling. It could be some other thing too as this is the first time I'm running mfakto under linux.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
gpuOwL: an OpenCL program for Mersenne primality testing	preda	GpuOwl	2718	2021-07-06 18:30
mfaktc: a CUDA program for Mersenne prefactoring	TheJudger	GPU Computing	3497	2021-06-05 12:27
LL with OpenCL	msft	GPU Computing	433	2019-06-23 21:11
OpenCL for FPGAs	TObject	GPU Computing	2	2013-10-12 21:09
Program to TF Mersenne numbers with more than 1 sextillion digits?	Stargate38	Factoring	24	2011-11-03 00:34

2014-03-30, 21:12	#1026
Bdot Nov 2010 Germany 3·199 Posts	I just posted the Linux version, basically untested (will test tomorrow). But you could give it a try. "mfakto-pi" is the "PerformanceInfo" version that measures each kernel's run time. _x32 and _x64 are the normal, optimized versions. Try playing around with these mfakto.ini parameters to see if any combination works: VectorSize SieveOnGPU GPUType Depending on the errors you'll encounter, other settings may be needed too. I agree that the GIMPS contribution in terms of GHz-days will be rather limited. But isn't getting the achievement "First to run mfakto on Intel GPU" something to be proud of ? I think we're closing in on it ...

2014-03-30, 23:28	#1028
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 7,537 Posts	Last I looked, Intel only has Windows drivers for OpenCL support. The forums indicated Linux support was not on the horizon.

2014-03-31, 07:28	#1029
Bdot Nov 2010 Germany 3·199 Posts	Hmm, I did not think any company could still run that strategy ... Well, ET_, this means your system won't run mfakto on the Intel GPU anytime soon ...

2014-03-31, 18:44	#1031
Bdot Nov 2010 Germany 3·199 Posts	Did anyone try the 0.14pre4 version on Intel HD yet (obviously only on win)? Did anything change compared to 0.13? Is anyone besides kracker testing 0.14pre4 at all?

2014-03-31, 22:57	#1032
gjmccrac Aug 2009 Ontario, Canada 10000011₂ Posts	I am trying it and it seems to be working. Windows 8.1 AMD Radeon HD 8470 (Device 6778) Catalyst Version 13.12