mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Hardware > GPU Computing

Reply
 
Thread Tools
Old 2013-06-01, 06:56   #287
LaurV
Romulan Interpreter
 
LaurV's Avatar
 
Jun 2011
Thailand

22FC16 Posts
Default

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 View Post
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

Last fiddled with by LaurV on 2013-06-01 at 07:10
LaurV is offline   Reply With Quote
Old 2013-06-01, 13:01   #288
owftheevil
 
owftheevil's Avatar
 
"Carl Darby"
Oct 2012
Spring Mountains, Nevada

1001110112 Posts
Default

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.
owftheevil is offline   Reply With Quote
Old 2013-07-01, 17:46   #289
ET_
Banned
 
ET_'s Avatar
 
"Luigi"
Aug 2002
Team Italia

22×1,193 Posts
Default

Anyone working on the worktodo parsing?

Luigi
ET_ is offline   Reply With Quote
Old 2013-07-01, 18:10   #290
owftheevil
 
owftheevil's Avatar
 
"Carl Darby"
Oct 2012
Spring Mountains, Nevada

32·5·7 Posts
Default

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.
owftheevil is offline   Reply With Quote
Old 2013-07-02, 09:23   #291
ET_
Banned
 
ET_'s Avatar
 
"Luigi"
Aug 2002
Team Italia

22·1,193 Posts
Default

Quote:
Originally Posted by owftheevil View Post
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
ET_ is offline   Reply With Quote
Old 2013-07-08, 14:31   #292
BigBrother
 
Feb 2005
The Netherlands

3328 Posts
Default

Quote:
Originally Posted by owftheevil View Post
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

Last fiddled with by BigBrother on 2013-07-08 at 14:31
BigBrother is offline   Reply With Quote
Old 2013-07-08, 16:36   #293
ET_
Banned
 
ET_'s Avatar
 
"Luigi"
Aug 2002
Team Italia

22×1,193 Posts
Default

Quote:
Originally Posted by BigBrother View Post
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
ET_ is offline   Reply With Quote
Old 2013-07-08, 23:37   #294
owftheevil
 
owftheevil's Avatar
 
"Carl Darby"
Oct 2012
Spring Mountains, Nevada

1001110112 Posts
Default

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.
owftheevil is offline   Reply With Quote
Old 2013-08-11, 01:57   #295
nucleon
 
nucleon's Avatar
 
Mar 2003
Melbourne

10038 Posts
Default

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
nucleon is offline   Reply With Quote
Old 2013-08-11, 02:08   #296
TheMawn
 
TheMawn's Avatar
 
May 2013
East. Always East.

172710 Posts
Default

CudaLucas, mfaktc, the ECM thing and now this? What do we have CPUs for anyway?
TheMawn is offline   Reply With Quote
Old 2013-08-11, 02:32   #297
kracker
ἀβουλία
 
kracker's Avatar
 
"Mr. Meeseeks"
Jan 2012
California, USA

32·241 Posts
Default

Quote:
Originally Posted by TheMawn View Post
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
kracker is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
mfaktc: a CUDA program for Mersenne prefactoring TheJudger GPU Computing 3434 2020-11-07 08:01
World's second-dumbest CUDA program fivemack Programming 112 2015-02-12 22:51
World's dumbest CUDA program? xilman Programming 1 2009-11-16 10:26
Factoring program need help Citrix Lone Mersenne Hunters 8 2005-09-16 02:31
Factoring program ET_ Programming 3 2003-11-25 02:57

All times are UTC. The time now is 22:43.

Wed Dec 2 22:43:30 UTC 2020 up 83 days, 19:54, 2 users, load averages: 1.98, 1.59, 1.97

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.