double or single precision

astrocrab
astrocrab
Joined: 28 Jan 08
Posts: 208
Credit: 429202534
RAC: 0
Topic 198136

hello!
it's unclear to me, does e@h use DP or SP for gpu crunching?
i'm trying to find most effective gpu for e@h.

Mike Hewson
Mike Hewson
Moderator
Joined: 1 Dec 05
Posts: 6591
Credit: 325517562
RAC: 67378

double or single precision

Quote:
hello!
it's unclear to me, does e@h use DP or SP for gpu crunching?
i'm trying to find most effective gpu for e@h.


To my knowledge they are SP ( 32 bit ) operands. The main merit is in the parallelisation, so the more compute units the better. Bikeman/HB is the real whiz at this stuff ...

Cheers, Mike.

I have made this letter longer than usual because I lack the time to make it shorter ...

... and my other CPU is a Ryzen 5950X :-) Blaise Pascal

astrocrab
astrocrab
Joined: 28 Jan 08
Posts: 208
Credit: 429202534
RAC: 0

so, fury x seems to be the

so, fury x seems to be the crunching leader with it's 8600 gflops of SP?

Mumak
Joined: 26 Feb 13
Posts: 335
Credit: 3573509686
RAC: 1165015

E@H is SP. There are just few

E@H is SP. There are just few other projects that can utilize DPFP (e.g. Milkyway@Home).

Bernd Machenschalk
Bernd Machenschalk
Moderator
Administrator
Joined: 15 Oct 04
Posts: 4332
Credit: 252156425
RAC: 33286

We try to restrict to single

We try to restrict to single precision wherever possible. The Radio Pulsar searches (BRP) are single precision only, the Gravitational Wave searches (of which we occasionally have GPU versions) are mostly single precision, but a few operations still need to be performed in double precision.

BM

BM

Sasa Jovicic
Sasa Jovicic
Joined: 17 Feb 09
Posts: 78
Credit: 94509928
RAC: 91096

Bernd, can you be more

Bernd, can you be more precise please? In the next few months I will build my new PC and E@H is my priority project so I need more information about these "few operations" in double precision.

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
Moderator
Joined: 28 Aug 06
Posts: 3522
Credit: 780110746
RAC: 1197253

RE: Bernd, can you be more

Quote:
Bernd, can you be more precise please? In the next few months I will build my new PC and E@H is my priority project so I need more information about these "few operations" in double precision.

Sorry, neither Bernd nor anyone else from the development team can be more specific, because as far as apps with double precision are concerned, we are talking about things that are yet to come. I guess it's fair to say that you will want to have a card that is capable of doing double precision, but double precision performance should not be your primary concern in choosing which card to buy.

HB

Filipe
Filipe
Joined: 10 Mar 05
Posts: 186
Credit: 415758650
RAC: 203309

Is there any plans to use

Is there any plans to use GPU's for the current GW S6 run?

Bikeman (Heinz-Bernd Eggenstein)
Bikeman (Heinz-...
Moderator
Joined: 28 Aug 06
Posts: 3522
Credit: 780110746
RAC: 1197253

RE: Is there any plans to

Quote:
Is there any plans to use GPU's for the current GW S6 run?

No, the current S6 GW run will finish on CPUs only.

HB

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.