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Old 2018-09-10, 17:30   #1
lycorn
 
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Default Is this possible at all?

From the Recent Cleared Report:

ramgeis Manual testing 999999937 C 2018-09-10 09:52 1843.9 50800.332 4307529C0B5EB6__

A few thoughts:

1. I am under the impression that testing above ~500M is not yet supported by the client(s) used. Even if it is currently possible, this test was started more than 5 years ago, and at that time I´m nearly 100% sure it was not the case.

2. Assuming it is / was possible, shall we have any confidence that a test that ran for 1843.9 days is to be trusted? And no, I will not volunteer to run the DC... LOL.

I am curious about the story of this test, but oh well, that´s probably only me...
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Old 2018-09-10, 17:39   #2
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The longest assignment (as of the end of last year) was the LL test of M332197309 by Lelikoid, which took 3197.2 days (that's 8 ¾ years).

And yeah, it's marked "Suspect"...
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Old 2018-09-10, 17:47   #3
petrw1
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Quote:
Originally Posted by lycorn View Post
From the Recent Cleared Report:

ramgeis Manual testing 999999937 C 2018-09-10 09:52 1843.9 50800.332 4307529C0B5EB6__

A few thoughts:

1. I am under the impression that testing above ~500M is not yet supported by the client(s) used. Even if it is currently possible, this test was started more than 5 years ago, and at that time I´m nearly 100% sure it was not the case.

2. Assuming it is / was possible, shall we have any confidence that a test that ran for 1843.9 days is to be trusted? And no, I will not volunteer to run the DC... LOL.

I am curious about the story of this test, but oh well, that´s probably only me...
All I can add is that Prime95 is limited to a little under 600M.
However, I believe there is other GPU or CUDA based software that does not have this limit.
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Old 2018-09-10, 17:53   #4
lycorn
 
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Quote:
Originally Posted by petrw1 View Post
All I can add is that Prime95 is limited to a little under 600M.
True. I did mean to write "600M", it was a typo.

Quote:
Originally Posted by petrw1 View Post
However, I believe there is other GPU or CUDA based software that does not have this limit.
That´s possible, but were those clients available in summer 2013?
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Old 2018-09-10, 18:49   #5
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Quote:
Originally Posted by lycorn View Post
That´s possible, but were those clients available in summer 2013?
I don't know about CUDA but searching for chalsall in the GPUto72 forum brings up threads for that GPU project that start on 2011 12-01

Last fiddled with by science_man_88 on 2018-09-10 at 18:50
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Old 2018-09-10, 19:12   #6
ATH
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Since version 29.2 there have been 50M FFT for FMA only:
https://mersenneforum.org/showpost.p...14&postcount=1

but that should only be enough for 930M-940M at the most, and that version only came out 1 year and 3 months ago.

CUDALucas has up to 64M FFT and Mlucas at least 64M, but then it should have been a manual turn in.


Edit: Oh it was a manuel test, but with CUDALucas it would not have the information about number of days it took.

Last fiddled with by ATH on 2018-09-10 at 19:23
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Old 2018-09-10, 19:13   #7
chalsall
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Quote:
Originally Posted by science_man_88 View Post
I don't know about CUDA but searching for chalsall in the GPUto72 forum brings up threads for that GPU project that start on 2011 12-01
Sigh... Your point being?
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Old 2018-09-10, 20:07   #8
ramgeis
 
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Quote:
Originally Posted by lycorn View Post
From the Recent Cleared Report:

ramgeis Manual testing 999999937 C 2018-09-10 09:52 1843.9 50800.332 4307529C0B5EB6__

A few thoughts:

1. I am under the impression that testing above ~500M is not yet supported by the client(s) used. Even if it is currently possible, this test was started more than 5 years ago, and at that time I´m nearly 100% sure it was not the case.

2. Assuming it is / was possible, shall we have any confidence that a test that ran for 1843.9 days is to be trusted? And no, I will not volunteer to run the DC... LOL.

I am curious about the story of this test, but oh well, that´s probably only me...
Hi, I'm happy to answer your implicit questions. ;-)

- the software used for the test was CUDALucas v2.06beta
- although I reserved the exponent (mainly for for doing idle TF work) 5 years ago I started with the LL test about half a year ago when the hardware to do it in a reasonable time was available (Nvidia GV100)
- the FFT size used was 57344K, roughly 16 ms/iteration
- I kept some intermediate save files in case someone is interested ;-)
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Old 2018-09-10, 20:19   #9
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Quote:
Originally Posted by ramgeis View Post
Hi, I'm happy to answer your implicit questions. ;-)
Cool. Why did you run a LL test that high?
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Old 2018-09-10, 20:23   #10
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Some additional information:


- beforehand I did a couple of DCs to check the hardware/software combination

- the ROE reported was all the time beween 0.19 and 0.23, mostly in the 0.21 area
- at the moment I'm running a couple of DCs to check the current hardware situation
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Old 2018-09-10, 20:37   #11
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Quote:
Originally Posted by chalsall View Post
Cool. Why did you run a LL test that high?
Because it seemed to be possible, so I had to try it out. :-)
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