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Old 2019-07-15, 16:26   #1
kriesel
 
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"TF79LL86GIMPS96gpu17"
Mar 2017
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Default drafts in progress, comments would probably be premature

(whatever I happen to be writing at the moment, or thinking about doing later)

Please wait.
Your understanding, patience, and cooperation will be appreciated.
And it may save you some time.

Posts by others in this thread will be moved or removed without warning or recourse.


Top of reference tree: https://www.mersenneforum.org/showpo...22&postcount=1

Last fiddled with by kriesel on 2020-10-07 at 19:51
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Old 2019-12-07, 17:38   #2
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"TF79LL86GIMPS96gpu17"
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Default Mfactor for cpu or CUDA gpu

(reference info for starting up with Ernst Mayer's Mfactor program)


Meanwhile, see https://www.mersenneforum.org/showthread.php?t=25009 and other content available from links there


Top of reference tree: https://www.mersenneforum.org/showpo...22&postcount=1

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Old 2019-12-19, 16:41   #3
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"TF79LL86GIMPS96gpu17"
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Default

Gpu memory requirements for PRP versus exponent
Gpu memory requirements for P-1 versus exponent


Top of reference tree: https://www.mersenneforum.org/showpo...22&postcount=1

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Old 2020-01-25, 15:23   #4
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"TF79LL86GIMPS96gpu17"
Mar 2017
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Default Starfish reference thread

Starfish is ...


Top of reference tree: https://www.mersenneforum.org/showpo...22&postcount=1

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Old 2020-01-25, 15:25   #5
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Default Starfish discussion thread

This is the place to discuss the Starfish software, propose new features, ask questions you haven't been able to figure out on your own, etc.


Top of reference tree: https://www.mersenneforum.org/showpo...22&postcount=1

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Old 2020-05-01, 21:05   #6
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"TF79LL86GIMPS96gpu17"
Mar 2017
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Default CEMPLLA

links, test comments, etc

Test environment:

Last fiddled with by kriesel on 2020-05-02 at 17:27
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Old 2020-05-01, 21:06   #7
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"TF79LL86GIMPS96gpu17"
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Default Wagstaff numbers

tf, primality testing, links etc.
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Old 2020-06-10, 23:50   #8
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Default FAQs?

Updated set of FAQs?
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Old 2020-07-23, 17:04   #9
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"TF79LL86GIMPS96gpu17"
Mar 2017
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Default Xeon phi

Selecting hardware
Xeon Phi is a manycore Intel x86 design. https://en.wikipedia.org/wiki/Xeon_Phi


Knight's Corner generation are much more economical than Knight's Landing which has nearly triple the DP performance.
Knight's Corner are mostly PCIe based. Most models end in P indicating they are designed to be cooled passively by separate case-mounted fans in servers or supercomputer designs, but there are 3120A and 7120A models that are PCIe with integral fans. Used 3120A or 7120A units are available sometimes below $200 in 2020.

Knight's Landing are mostly socket-style, for use as the cpu in a system with a special motherboard designed for them, but an occasional PCIe-format coprocessor unit surfaces. Prices of used units tend to range from $600 to above $2000 for Knight's Landing, as of mid 2020.

Pricing and form factor were decisive for me, so I bought a 7120A when I saw one available at a good price.

Installation
The device is a dual-slot PCIe card requiring 300W; 75W from PCIe socket, 75 from a 6-pin power connector, 150W from an 8pin power connector. Power connectors are at the forward end, and the fan air flow discharges out the opposite end. The device is a heavily, solidly constructed brick. It has a partial metal backplate and a nearly complete cover.
Physical installation is like that of a large gpu. I chose to install mine on an active PCIe extender.
Upon power up, there is a blinking blue LED visible through the bracket openings.
Windows 10 Device Manager identifies it as a coprocessor. It has no idea where to find drivers.


Setup
(MPSS download, unzip, install)



Software


Performance


(add photos)

Last fiddled with by kriesel on 2020-11-01 at 15:01
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Old 2020-08-24, 04:11   #10
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"TF79LL86GIMPS96gpu17"
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Default History and evolution of Mersenne prime software

Antiquity (discovery of Mersenne primes, early methods of finding them etc)
Precomputer (Lucas test; Lehmer)

Pre GIMPS

Early GIMPS
Prime95 TF, LL, LLDC. Addition of ECM, P-1. Change from database & emailed assignment blocks, to PrimeNet API internet auto and manual assignents and reporting

GPUs
TF CUDA & OpenCL, P-1 CUDA, LL CUDA & OpenCL

Recent developments (lots of them!)
Jacobi check; PRP with GEC; PRP proof of work and correctness; attempts to use squarings for both PRP and P-1; P-1 error correction;

Cloud computing

Future prospects

Last fiddled with by kriesel on 2020-10-07 at 20:04
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Old 2020-10-07, 06:28   #11
kriesel
 
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"TF79LL86GIMPS96gpu17"
Mar 2017
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112178 Posts
Default installing version upgrades

A post for each app? May be easier for users to find if in each app's specific reference thread. see prime95 for an example

Last fiddled with by kriesel on 2020-10-07 at 20:05
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