mersenneforum.org

mersenneforum.org (https://www.mersenneforum.org/index.php)
-   GPU Computing (https://www.mersenneforum.org/forumdisplay.php?f=92)
-   -   mfaktc: a CUDA program for Mersenne prefactoring (https://www.mersenneforum.org/showthread.php?t=12827)

chalsall 2014-10-01 22:55

[QUOTE=owftheevil;384188]The rounding and carying kernel (~8-10% of the iteration time) is mostly integer arithmetic, but the ffts and the pointwise multiplication are dpfp.[/QUOTE]

Did you know the Z80 only had a 4 bit ALU?

F' me over a bread board! No wonder a 6502 beat it's pants off for real-world work!

owftheevil 2014-10-02 03:00

[QUOTE=chalsall;384189]Did you know the Z80 only had a 4 bit ALU?
![/QUOTE]

No I didn't.

[QUOTE]
F' me over a bread board! ... [/QUOTE]

No thanks,not my thing, but thanks for the offer :-)

kracker 2014-10-02 03:02

[QUOTE=chalsall;384189]Did you know the Z80 only had a 4 bit ALU?

F' me over a bread board! No wonder a 6502 beat it's pants off for real-world work![/QUOTE]

...Is that you davieddy?

kladner 2014-10-02 03:53

[QUOTE=kracker;384197]...Is that you davieddy?[/QUOTE]
:devil::goodposting::stirpot: Wonder if he's still on this plane of existence. :davieddy:

Karl M Johnson 2014-10-02 05:12

[QUOTE=owftheevil;384188]The rounding and carying kernel (~8-10% of the iteration time) is mostly integer arithmetic, but the ffts and the pointwise multiplication are dpfp.[/QUOTE]
BAH!
I meant mfaktc.
CuLu is, obviously, mostly about dpfp.

Mark Rose 2014-10-02 15:20

[QUOTE=Karl M Johnson;384201]BAH!
I meant mfaktc.
CuLu is, obviously, mostly about dpfp.[/QUOTE]

Oh, in that case, no. mfaktc doesn't use any DPFP in CUDA.

Ralf Recker 2014-10-16 11:34

[QUOTE=TheJudger;383607]Don't know how you and other act: but I buy my GPUs for playing PC games, GPU computing (mfaktc) is not really a concern when buying GPUs, except that I only choose nvidia GPUs for two reasons:[LIST][*]CUDA[*]used to use nvidia GPU for a long time now, I'm lazy and don't want to teach myself with another driver[/LIST][/QUOTE]
I hope next time NVIDIA tests their cards and drivers on boxes with 32 GB RAM installed.

I had to use msconfig to tell windows to use only 30 GB on boot to avoid a bunch of crashes.

flashjh 2014-10-16 13:35

I don't have any problems with 32gb or more.

James Heinrich 2014-10-16 13:47

[QUOTE=Ralf Recker;385319]I hope next time NVIDIA tests their cards and drivers on boxes with 32 GB RAM installed.[/QUOTE]I've has 64GB in my machine for the last 3 years with (at various times) a GTX 570, GTX 670, two GTX 670s, even an 8800GT and not experienced any issues.

Ralf Recker 2014-10-16 14:20

[QUOTE=James Heinrich;385323]I've has 64GB in my machine for the last 3 years with (at various times) a GTX 570, GTX 670, two GTX 670s, even an 8800GT and not experienced any issues.[/QUOTE]

I had no problems either until I installed a 4GB maxwell card and tested it with a program that can use more than 2GB of video memory. A least it's an already known bug and not defective hardware.

Mark Rose 2014-10-16 19:10

32 GB of RAM is a common setup these days with RAM being so cheap. I'm surprised they weren't testing that configuration.


All times are UTC. The time now is 23:14.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.