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drummers-lowrise
1) Message boards : Generalized Fermat Prime Search : Is there any plan to fix 100% cpu usage on linux? (Message 123176)
Posted 135 days ago by axn
As the thread title says, in linux, running Genefer on Nvidia GPU uses a full CPU. Is there anything in the works to fix this?

Judging from Iain's post here, he was looking into it.
But that post was 60 days ago, so I don't know if it's moving along. Either way, Iain is the person to implement this.

Ok. Maybe we need input from creator(s) of AP27. That one uses very little CPU. PPS-sieve also, but I think that one is CUDA.

EDIT:- GFNSvOCL as well with the help of W1 flag (I don't have direct experience running it, but saw it in the forums)
2) Message boards : Generalized Fermat Prime Search : GFN21 GFN22 Scoreboard, post your times/hardware (Message 123154)
Posted 137 days ago by axn
Gigabyte 1050 Ti OC edition / Core i3-8100 CPU / Ubuntu 18.04

With GFN21 running on the GPU and 3 cores on the CPU,
GPU = 32 hr
CPU = 34 hr

Running only on CPU with all 4 cores,
CPU = 30 hr

I will be doing a testing with CPU = 4 cores and GPU running simultaneously. Will post that once I have the results.
3) Message boards : Generalized Fermat Prime Search : Is there any plan to fix 100% cpu usage on linux? (Message 123087)
Posted 139 days ago by axn
there is a fix described in the complete thread (maybe read it in total); I tried to gave the most important post here

Ok, I haven't looked at that in any detail. Any reason why the fix can't be done in the program itself? The other OpenCL apps are well behaved. Is there anything fundamental about Genefer that prevents the same behavior?
4) Message boards : Generalized Fermat Prime Search : Is there any plan to fix 100% cpu usage on linux? (Message 123085)
Posted 139 days ago by axn
As the thread title says, in linux, running Genefer on Nvidia GPU uses a full CPU. Is there anything in the works to fix this?
5) Message boards : Number crunching : 2019 Challenge Voting (Message 122586)
Posted 154 days ago by axn
SoB
PSP
ESP
TRP
GFN17-MEGA
PPSE
GCW LLR
6) Message boards : Sieving : Bad n value (Message 119971)
Posted 249 days ago by axn
Must be an older version of the program with different n limits. Just running the program without any parameter will print the help. What does it say in terms of supported n ?
7) Message boards : Number crunching : World Cup Challenge (Message 119315)
Posted 287 days ago by axn
Something wrong with users "Team" column.
Mine is showing "The Knights Who Say Ni!", should be "PrimeSearchTeam".
And I noticed errors in "Team" for other users too.

--
Lumiukko

Yep. The pattern of error is a simple off-by-one error, based on the very first challenge. The n-th user in challenge 1 is associated with (n+1)-th user's team.
8) Message boards : Number crunching : 2018 Mega Primes (Message 118965)
Posted 301 days ago by axn
Fixed. Thanks axn & Robish.

Line 53 should be a +1, not a -1. The last SR5 find was on the Sierpinski side.
9) Message boards : Number crunching : 2018 Mega Primes (Message 118918)
Posted 302 days ago by axn
| 53 | 249 | 21/06/2018 | SR5 | 1 775 361 | 81556? * 5^2542838 - 1 | +------+-----+------------+----------+-----------+---------------------------+


Copy/paste error on the last line. Should be 81556 * 5^2539960 + 1
10) Message boards : General discussion : Does primegrid have priorities? (Message 118763)
Posted 306 days ago by axn
PPS-Sieve is the least important of the GPU projects. We'd therefore prefer people run AP27 or any of the GFN tasks, with larger GFN tasks prefered over the shorter tasks. PPS-Sieve is very far ahead of its associated LLR projects and the sieving currently being done won't be useful for a while.

Unfortunately, due to the _huge_ credit difference, this is unlikely to happen for the vast majority of people, whose only/main focus is credits.


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