mfakto: an OpenCL program for Mersenne prefactoring

[Bdot]

Originally Posted by Bdot

Anyway, testing the new mfakto version on Windows with 11.9 and 11.11 went well and everything seemed fine. Today I updated my Linux box to 11.11, and guess what I get within minutes ...

[fglrx] ASIC hang happened

I found AMD has updated the docs to their APPSDK of August:

For a successful build and correct operation of individually downloaded s when using the Linux
Catalyst 11.11 drivers or later and the Linux AMD APP SDK 2.5, delete the old 2.5 runtime
files from /opt/AMDAPP/ .
To do this for 32-bit Linux OS:
a. Go to /opt/AMDAPP/lib/x86.
b. Delete the libamdocl32.so and the libOpenCL.so.1 files.
c. Create a symlink under /usr/lib using the command
# ln –s libOpenCL.so.1 libOpenCL.so
To do this for 64-bit Linux OS:
a. Go to /opt/AMDAPP/lib/x86.
b. Delete the libamdocl32.so and the libOpenCL.so.1 files.
c. Go to /opt/AMDAPP/lib/x86_64.
d. Delete the libamdocl64.so and the libOpenCL.so.1 files.
e. Create a symlink under /usr/lib using the command
# ln –s libOpenCL.so.1 libOpenCL.so
f. Create a symlink under /usr/lib64 using the command
# ln –s libOpenCL.so.1 libOpenCL.so

3 mfakto instances running now for over 2 hours without any hang, so this seems to be solved! Now I can actually go and do the final changes and tests for mfakto 0.10 release.

[KyleAskine]

Originally Posted by Bdot

Now I can actually go and do the final changes and tests for mfakto 0.10 release.

Any ETA? I am going to have to wipe one of my computers soon, and I am installing a new GPU in another. I would prefer to wait until the new mfakto is out so I can go right to the latest drivers in both cases.

Thanks for all of your work!

[Bdot]

Originally Posted by KyleAskine

Any ETA?

Well, not too soon. I'm incorporating some mfaktc-changes, and more of an issue, I started bigger restructuring changes that I should have postponed for the next version.

So certainly not before next weekend, and due to saisonal increases of the importance of the family, it may take even longer .

However, I can send you a testing version for win/64 that was stable* before I started my restructuring. It does not have a lot of changes from 0.09, but runs on 11.11. Send me a pm with your email if you're interested.

* safe to be used to submit results.

[KyleAskine]

Originally Posted by Bdot

Well, not too soon. I'm incorporating some mfaktc-changes, and more of an issue, I started bigger restructuring changes that I should have postponed for the next version.

So certainly not before next weekend, and due to saisonal increases of the importance of the family, it may take even longer .

However, I can send you a testing version for win/64 that was stable* before I started my restructuring. It does not have a lot of changes from 0.09, but runs on 11.11. Send me a pm with your email if you're interested.

* safe to be used to submit results.

I can hold out and just load 11.9

Thanks again for everything you do for us!

[flashjh]

Hey everyone,

Looking for some guidance/help. I was running a QX9650 with two HD 5870s. I haven't actually added up the GHz/Days with that setup, but it ran very well.

Anyway, since I could't max the GPUs with the CPU I decided to upgrade my system.

I bought a dual CPU Opteron 6272 (32 cores total) with the Asus KGPE-D16 motherboard. The system works great but now I can't get mfakto to push my GPUs for anything (like at least 8 times slower). I tried the newest pre-release with 11.11 and then reverted back to the older mfakto with 11.9; same result.

I know it's a new CPU and all, but with two full 16x PCI-e slots I figured the 5870 would be screaming on this thing.

Like I said, everything works great besides that but I got this setup for mfakto.

Any help is appreciated. Since it isn't working I'm going to sell it off any buy something better suited for mfakto -- what does everyone suggest for the fastest single system mfakto crusher? Thanks!

[diamonddave]

Originally Posted by flashjh

Hey everyone,

Looking for some guidance/help. I was running a QX9650 with two HD 5870s. I haven't actually added up the GHz/Days with that setup, but it ran very well.

Anyway, since I could't max the GPUs with the CPU I decided to upgrade my system.

I bought a dual CPU Opteron 6272 (32 cores total) with the Asus KGPE-D16 motherboard. The system works great but now I can't get mfakto to push my GPUs for anything (like at least 8 times slower). I tried the newest pre-release with 11.11 and then reverted back to the older mfakto with 11.9; same result.

I know it's a new CPU and all, but with two full 16x PCI-e slots I figured the 5870 would be screaming on this thing.

Like I said, everything works great besides that but I got this setup for mfakto.

Any help is appreciated. Since it isn't working I'm going to sell it off any buy something better suited for mfakto -- what does everyone suggest for the fastest single system mfakto crusher? Thanks!

This look like a Bulldozer CPU setup?

Try looking in the "Hardware>Launch of the AMD FX 8 Core processor" less then stellar review!

[Dubslow]

Yes, the problem with bulldozers is that there is only one FPU for every two ALU's, so a module is not truly two cores. OTOH, I remember reading that mfakt* is supposed to run on the ALU's...

The other note is that Windows and Linux ATM are horrible at process scheduling on Bulldozers, because they aren't aware of the architecture's oddities. Windows 8 at least should see a major performance increase on Bulldozer because it will understand the module architecture and will thus schedule processes better.


Edit: Conclusion is for now at least, not Bulldozer.

[flashjh]

Originally Posted by Dubslow

Yes, the problem with bulldozers is that there is only one FPU for every two ALU's, so a module is not truly two cores. OTOH, I remember reading that mfakt* is supposed to run on the ALU's...

The other note is that Windows and Linux ATM are horrible at process scheduling on Bulldozers, because they aren't aware of the architecture's oddities. Windows 8 at least should see a major performance increase on Bulldozer because it will understand the module architecture and will thus schedule processes better.


Edit: Conclusion is for now at least, not Bulldozer.

That makes me wonder if it's worth holding on to or not? Anyway, I'm putting my Intel system back together for now. What a shame.

[Dubslow]

Originally Posted by flashjh

That makes me wonder if it's worth holding on to or not? Anyway, I'm putting my Intel system back together for now. What a shame.

I have no idea. Considering how much it must have cost, probably holding on to it is better then throwing it away, unless you intended to sell it.

[flashjh]

Originally Posted by Dubslow

I have no idea. Considering how much it must have cost, probably holding on to it is better then throwing it away, unless you intended to sell it.

Well, I would either sell everything or set it up for P-1/LL processing. It does a really amazing job for that. I just want to concentrate on TF for now and it's horrible for that.

I'll probably list it for what I paid and use it until then. I just need another power supply that won't arrive until Friday.

For max TFing, what system do you recommend?

[KyleAskine]

Originally Posted by flashjh

Well, I would either sell everything or set it up for P-1/LL processing. It does a really amazing job for that. I just want to concentrate on TF for now and it's horrible for that.

I'll probably list it for what I paid and use it until then. I just need another power supply that won't arrive until Friday.

For max TFing, what system do you recommend?

My i5-2500K overclocked to 4.6GHz saturates my 2x6970 at around 35000 primes sieved. Just one instance for each card.

You don't need to go super expensive to do this.

http://i.imgur.com/7vRKE.jpg <-- Pic of me saturating my cards