The P-1 factoring CUDA program - Page 27

LaurV · 2013-06-01, 06:56

I understand perfectly about the performance hit. It was just an idea, trying to convince you to "work out" the stage 2 a bit. Because the long time for huge B2 in cudapm1 is "bothersome". If it crush in the middle -> waste... [edit: by the way, "cheap cards" was referring to cheap video cards, without much memory (which could participate to the game if the game won't require a "pro" card) and not to some algorithmic tricks, and "one large prime variation" is another name for stage 2 of P-1. Sorry if my English makes trouble for you, I was never a good speaker

]

Quote:

Originally Posted by owftheevil

By the way, very clean and easy to read code. I wish I could do that.

That is because I did not have to deal with any of the "low level" things, Pari internal kitchen takes care about. It is like you are reading the 50 lines long "main()" function, from a 10-thousand lines C program, which main() is only calling the functions. It has nothing to be "unclear" or "untidy" about it. But thanks for the compliment anyhow

owftheevil · 2013-06-01, 13:01

Quote:

Sorry if my English makes trouble for you, I was never a good speaker

Your English is fine, I was just being stupid. It didn't take me long to realize that by "cheap cards" you meant "cheap cards". The other phrase became clear when I read your code.

ET_ · 2013-07-01, 17:46

Anyone working on the worktodo parsing?

Luigi

owftheevil · 2013-07-01, 18:10

Not as far as I know.

I've got stage 2 error reporting and checkpoints working, just need to fix the ETA estimates when resuming stage 2.

ET_ · 2013-07-02, 09:23

Quote:

Originally Posted by owftheevil

Not as far as I know.

I've got stage 2 error reporting and checkpoints working, just need to fix the ETA estimates when resuming stage 2.

Thanks

BigBrother · 2013-07-08, 14:31

Quote:

Originally Posted by owftheevil

Not as far as I know.

I've got stage 2 error reporting and checkpoints working, just need to fix the ETA estimates when resuming stage 2.

Any chance of a new version? Checkpoints for stage 2 would make me VERY happy

ET_ · 2013-07-08, 16:36

Quote:

Originally Posted by BigBrother

Any chance of a new version? Checkpoints for stage 2 would make me VERY happy

BTW, I had some issues with the last exponent. The proram stops (either on stage 1 ot in stage 2) and doesn't even feel the controlC (I had to killnine it).

It's not an overheating issue (i'm uing the GPU with mmff), maybe some memory issues.
I will dig a bit more into it in the next days.

Luigi

owftheevil · 2013-07-08, 23:37

The stage 2 checkpoints are essentially done, I just want to add an option in the ini file to deal with deleting the savefiles at the end of a test or not. However, I can't do anything until they let us go back home again. We were evacuated on the 4th due to a fire.

nucleon · 2013-08-11, 01:57

Ok, I've started both my titans on P-1.

Stage1+Stage2 completed on current exponents in <2hrs.

They are just slightly ahead of my i5-3450 CPU @ 3.10GHz in terms of efficiency*. Latency - they blow it out of the park.

*Calc:
CPU:
per day:
8 * 3.7661GHz-days
90W
0.33GHz-days/W
GPU:
per day:
12*5.7006GHz-days
200W
0.34GHZ-days/W

Very rough figures of course.

-- Craig

TheMawn · 2013-08-11, 02:08

CudaLucas, mfaktc, the ECM thing and now this? What do we have CPUs for anyway?

kracker · 2013-08-11, 02:32

Quote:

Originally Posted by TheMawn

CudaLucas, mfaktc, the ECM thing and now this? What do we have CPUs for anyway?

CUDALucas isn't as efficient as mfaktc/o vs cpu. But yeah, almost everything runs on a gpu, lol

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2013-07-01, 17:46	#289
ET_ Banned "Luigi" Aug 2002 Team Italia 3²×5×107 Posts	Anyone working on the worktodo parsing? Luigi

2013-07-01, 18:10	#290
owftheevil "Carl Darby" Oct 2012 Spring Mountains, Nevada 100111011₂ Posts	Not as far as I know. I've got stage 2 error reporting and checkpoints working, just need to fix the ETA estimates when resuming stage 2.

2013-07-08, 23:37	#294
owftheevil "Carl Darby" Oct 2012 Spring Mountains, Nevada 3²·5·7 Posts	The stage 2 checkpoints are essentially done, I just want to add an option in the ini file to deal with deleting the savefiles at the end of a test or not. However, I can't do anything until they let us go back home again. We were evacuated on the 4th due to a fire.

2013-08-11, 01:57	#295
nucleon Mar 2003 Melbourne 203₁₆ Posts	Ok, I've started both my titans on P-1. Stage1+Stage2 completed on current exponents in <2hrs. They are just slightly ahead of my i5-3450 CPU @ 3.10GHz in terms of efficiency. Latency - they blow it out of the park. Calc: CPU: per day: 8 * 3.7661GHz-days 90W 0.33GHz-days/W GPU: per day: 12*5.7006GHz-days 200W 0.34GHZ-days/W Very rough figures of course. -- Craig

2013-08-11, 02:08	#296
TheMawn May 2013 East. Always East. 11·157 Posts	CudaLucas, mfaktc, the ECM thing and now this? What do we have CPUs for anyway?