PrimeGrid
Please visit donation page to help the project cover running costs for this month

Sponsored by:

Hosted at and sponsored by Rackspace.

Join PrimeGrid

Returning Participants

Community

Leader Boards

Results

Other

drummers-lowrise
1) Message boards : Sieving : GFNSvCuda vs gfnsvocl quirk (Message 117828)
Posted 12 days ago by tng*Project donor
Maybe this isn't new, but I discovered that on one of my systems, GFNSvCUDA did not recognize the integrated Intel graphics, but gfnsvocl did and recognized it as device 0. This resulted in me trying out gfnsvocl, running on the Intel graphics, and being appalled at the performance (I thought I was running on a GTX 1080).

something to be aware of.
2) Message boards : Number crunching : GFN22 barely using GPU but manual sieving uses 100%? (Message 117749)
Posted 15 days ago by tng*Project donor
For manual sieving, add the W1 flag for GFN20, 21 and 22 to minimize CPU usage. Probably won't affect GFN20 much, affects GFN21 somewhat, and GFN22 a lot. It doesn't seem to affect GFN18 or GFN19 sieving much if at all.


W1? the B and D flags I use all the time --a W flag doesn't seem to be accepted.

gfnsvocl_w64_2G.exe --help
GFNSvCUDA+ v0.7.1 (c) 2015 Anand Nair (anand.s.nair AT gmail)
OpenCL port by Roman Trunov (stream AT proxyma ru)

Incorrect number of arguments


GFNSvCUDA+ <n> <startp> <endp> [B<n>] [D<n>] [W<n>]

n: n in b^2^n+1. n >= 15 and n <= 24
startp, endp: the p range. specify in PETA (10^15) values.
valid range is between 1 and 604462909
B<n>: Block size. Optional. Controls the size of the block of
work sent to GPU. Should be between 5 and 13 (inclusive).
Defaults to 7 which is a good compromise. On slower systems,
you should reduce it to improve screen lag. On faster systems,
you can try increasing it to improve throughput
Eg:- Use B9 to increase the value to 9
D<n>: Device Number. Optional. For systems with multiple GPU,
indicate the device to use. Defaults to 0 (i.e. Primary device).
Eg:- use D1 to specify running on second GPU
W<n>: activate workaround for high CPU usage on NVidia. Optional.
W0 - do not use (default), W1 - activate.


I'm running Windows -- the app is GFNSvCUDA-0_7_1-win32.exe. What's gfnsvocl_w64_2G.exe and where would I get it if I wanted to use it?
3) Message boards : Number crunching : GFN22 barely using GPU but manual sieving uses 100%? (Message 117745)
Posted 15 days ago by tng*Project donor
For manual sieving, add the W1 flag for GFN20, 21 and 22 to minimize CPU usage. Probably won't affect GFN20 much, affects GFN21 somewhat, and GFN22 a lot. It doesn't seem to affect GFN18 or GFN19 sieving much if at all.


W1? the B and D flags I use all the time --a W flag doesn't seem to be accepted.
4) Message boards : Number crunching : Useful Win 10 feature (Message 117259)
Posted 33 days ago by tng*Project donor
Just so everyone is clear on this: when the computer comes back up, it is logged in, but at a lock screen -- you will have to provide a password to do anything. That should alleviate the security concerns some might have.
5) Message boards : Number crunching : 2018 Mega Primes (Message 116733)
Posted 48 days ago by tng*Project donor
We have found almost as much primes in March than during Tour de primes :)
2 days left to catch up TDP.

2018 Mega Prime Summary:
+----------+-----------------------------------------------------------------------+-------+ | | MP# | | | Project |-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+ Total | | | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | | +----------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-------+ | GFN-17 | 2 | 9 | 4 | | | | | | | | | | 15 | | GFN-18 | 2 | 1 | 1 | | | | | | | | | | 4 | | GFN-19 | 1 | 0 | 1 | | | | | | | | | | 2 | | GC | 1 | 0 | 1 | | | | | | | | | | 2 | | PPS-MEGA | 1 | 6 | 6 | | | | | | | | | | 13 | | WOODALL | 0 | 0 | 1 | | | | | | | | | | 1 | +----------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-------+ | Total | 7 | 16 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 37 | +----------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-------+ | 2017 | 2 | 10 | 6 | 4 | 6 | 4 | 3 | 9 | 4 | 5 | 4 | 4 | 61 | | 2016 | 2 | 60 | 5 | 1 | 4 | 7 | 2 | 4 | 3 | 8 | 8 | 3 | 107 | | 2015 | 3 | 2 | 2 | 1 | 3 | 1 | 0 | 1 | 1 | 2 | 2 | 0 | 18 | | 2014 | 3 | 1 | 3 | 3 | 3 | 1 | 4 | 5 | 2 | 3 | 1 | 1 | 30 | | 2013 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 3 | 5 | | 2012 | 2 | 3 | 0 | 1 | 0 | 3 | 0 | 1 | 0 | 1 | 1 | 0 | 12 | | 2011 | 1 | 2 | 1 | 1 | 4 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 11 | | 2010 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | | 2009 | 0 | 0 | 0 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | | 2008 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | | 2007 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | +----------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-------+



Where does 60 for February 2016 come from?
6) Message boards : Number crunching : Mathematics Awareness Month Challenge - questions (Message 116332)
Posted 59 days ago by tng*Project donor
Hi again,

I'm still a bit new around here but would like to 'dip my toe' into my first challenge starting next month, I have a few questions...
Will there be an announcement prior to the event going live?
Will said announcement have 'basic' instructions on how to best configure your PC for the challenge? (I'm thinking about things like 'turn off multi threading' etc.)
What do I do with WU's from other projects that haven't finished? Or do I just plan waaay ahead and change my preferences for ESPs now?

That's it for now, but it's likely I'll think of more

Thanx in advance

Dad


There will definitely be announcements. Once the current challenge ends, the countdown timer on the Primegrid main page will show the time remaining before the challenge, so you will know to the second when the challenge will officially begin.

There will be basic instructions -- probably the same as for
the current challenge

There are many options on what to do for other tasks. What I do is plan ahead and switch my work fetch over to only short Primegrid tasks in time to finish anything else, then switch to the challenge subproject once the challenge starts. If the tasks you are running are very long, this may be a problem.
7) Message boards : Number crunching : Badges - Full Sets! (Message 116213)
Posted 61 days ago by tng*Project donor
All active subprojects to Emerald.
8) Message boards : Number crunching : Badges III (Message 116212)
Posted 61 days ago by tng*Project donor
thanks to the challenge.
9) Message boards : Number crunching : Badges III (Message 116156)
Posted 62 days ago by tng*Project donor
10) Message boards : Number crunching : Badges III (Message 115949)
Posted 69 days ago by tng*Project donor


Next 10 posts
[Return to PrimeGrid main page]
Copyright © 2005 - 2018 Rytis Slatkevičius (contact) and PrimeGrid community. Server load 0.89, 1.31, 1.43
Generated 21 May 2018 | 0:02:59 UTC