Formula-BOINC Sprint #18 27th-30th Oct 2017

News and Announcements about BOINC, the Team and its Members (including Members birthdays, etc). This section can be used to note progress made (or hoped for) on specific projects. Team Crunchathons are announced here too.
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Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby UBT - Timbo » Sun Oct 08, 2017 5:54 pm

Hi all

Just 3 more Sprints to go (including this one !!) until the end of the year.

The announcement of this particular project Sprint will be made at 6AM BST on Thursday 26th October and starts at 6AM on the Friday.

Note that this one runs until 6AM on the MONDAY !!

This is the list of projects it could be:
BURP
Citizen Science Grid
Cosmology@home
DENIS@Home
Enigma@home
FiND@Home
PRIMABOINCA
PrimeGrid (GPU) < chosen project
SRBase
The dDM-Project
Universe@Home
VGTU@home
Wanless Mersenne +2

regards
Tim

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby UBT - Mikee » Sun Oct 08, 2017 10:13 pm

Hi

The last 3 sprints still haven't been crossed out though. Still a chance for PRIMABOINCA ;-)

Mike
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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby Woodles » Mon Oct 09, 2017 9:28 am

UBT - Mikee wrote:Hi

The last 3 sprints still haven't been crossed out though. Still a chance for PRIMABOINCA ;-)

Mike

Sorry Mike, it's looking a bit bleak for PRIMABOINCA (and Leiden) http://formula-boinc.org/forum/viewtopic.php?f=6&t=93

Mark

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby UBT - Timbo » Mon Oct 09, 2017 1:53 pm

Hi both

WOW - someone actually got a reply from sebastien on the FB forum - that's almost a miracle !!

regards
Tim

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby UBT - Mikee » Wed Oct 25, 2017 5:48 pm

Hi

Seems like someone has managed to get Primaboinca working again so it's back in the mix for the next sprint ;-)

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby Woodles » Wed Oct 25, 2017 9:38 pm

Congratulations Mikee, have at it! :D

Mark

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby Woodles » Thu Oct 26, 2017 6:49 am

Sprint on project PrimeGrid
from 10/27/2017 05:00 (UTC) to 10/30/2017 05:59 (UTC)

Time to power up those GPUs :)

ETA:
Top hosts seem to be running the PPS sieve application (Proth Prime Search Sieve (PPS-Sieve) in preferences)
Seems to be plenty of work available for a change :)

... or maybe not :(
26/10/2017 07:25:56 | PrimeGrid | Project has no tasks available

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby Woodles » Thu Oct 26, 2017 8:01 am

Not sure I've got enough tasks for 24 hours but they're finishing faster than I can replace them!

I still have some Moo and Collatz if I run out so internet off :D

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby chriscambridge » Thu Oct 26, 2017 9:10 am

I have gone with the Genefer 21 and 22 tasks; they take days to complete on a 1080 but if I remember rightly one of these pays out 680K credit.
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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby Woodles » Thu Oct 26, 2017 9:29 am

PPS Sieve takes 5 minutes on a 1080 for 3,371 credits - 971K credits a day :)

Easier to keep a cache filled with 2 day WUs though :D

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby chriscambridge » Thu Oct 26, 2017 10:39 am

What's the best CPU app for PrimeGrid on credits do you think?
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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby Woodles » Thu Oct 26, 2017 11:26 am

I haven't ran Primegrid for over a year so can't speak from recent experience but the highest ranked host without a GPU runs a selection of CPU tasks but mainly PPS sieve.

Most credits per second on a E7-8860 v3:
4746.4 credits for 29.9 hours (159 cr/hr) - Generalized Cullen/Woodall (LLR) v8.00
296.93 credits for 2.33 hours (127 cr/hr) - PPS-Mega (LLR) v8.00
3371.0 credits for 30.9 hours (109 cr/hr) - PPS (Sieve) v1.39 (cpuPPSsieve)
130.02 credits for 1.30 hours (100 cr/hr) - PPS (LLR) v8.00

Some Primegrid applications are multithreaded, I don't know which and it's difficult to tell from the application name but judging by the elapsed time and CPU time being pretty similar, I think these are all single threaded.

A little insignificant compared to a GPU (a GTX650 gives 10,000 cr/hr, a GTX1080ti gives 33,500 cr/hr) but if you've got a dual processor, 128 thread host like he has then it adds up :)

ETA:
An i7-4960X is also running the Seventeen or Bust v8.00 application to give 19,798 credits from 57.6 hours (344 cr/hr) You may not finish many before the sprint ends though :shock:

Mark

[edit]Slight miscalculation on the credits per hour for the GPUs, corrected :oops:[/edit]
Last edited by Woodles on Thu Oct 26, 2017 2:04 pm, edited 2 times in total.

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby UBT - Chris » Thu Oct 26, 2017 11:45 am

So PrimeGrid is the project, but is it just GPU? Or CPU as well?

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby chriscambridge » Thu Oct 26, 2017 11:49 am

Thanks Mark, that is very useful. PPS-Mega (LLR) or Generalized Cullen/Woodall (LLR) it is then.

Chris, PrimeGrid (PG) runs on Both CPU and GPU; Mark's previous post is about runtime and credits for CPU apps on PG.
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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby UBT - Chris » Thu Oct 26, 2017 1:31 pm

Hi Chris,

Thank you :) is the sprint just for GPU though? Or are all tasks counted?

I only ask because the original post says:
Hi all

Just 3 more Sprints to go (including this one !!) until the end of the year.

The announcement of this particular project Sprint will be made at 6AM BST on Thursday 26th October and starts at 6AM on the Friday.

Note that this one runs until 6AM on the MONDAY !!

This is the list of projects it could be:
BURP
Citizen Science Grid
Cosmology@home
DENIS@Home
Enigma@home
FiND@Home
PRIMABOINCA
PrimeGrid (GPU) < chosen project
SRBase
The dDM-Project
Universe@Home
VGTU@home
Wanless Mersenne +2

regards
Tim


Where it says PrimeGrid, it says GPU as well... Does this mean that it's capable of running on GPU or does it mean that the sprint is only for the GPU tasks?

Thanks,
Chris
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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby Woodles » Thu Oct 26, 2017 1:44 pm

Hi Chris,

It means Primegrid is capable of being ran on a GPU. It's generally refered to as a GPU project as the work done (and hence the credits awarded) are much more favourable to GPUs but there's also work and credits for CPUs which can and do crunch the project successfully just not as quickly.

There are also other projects on that list that have a CPU and GPU application. BURP does, PRIMABONCA does and I believe Enigma does as well. They don't tend to favour GPUs as much though so are usually referred to as CPU projects.

The way the Formula Boinc sprints work is that a snapshot is taken of the credits at the sprint starting time and another at the sprint end time and the difference used to calculate the work done. It doesn't matter if the credits come from a GPU, a CPU or worked out with pencil and paper! Neither does it matter if the work is actually done before the project starts and then reported or validated after the start.

Sieving reduces the amount of numbers that need to be checked for primality but if you want to find an actual prime number then you need to run one of the LLR sub-projects. Since you're asking I assume you'll be using CPUs in which case it's perfect for you as GPUs tend to do the sieving and CPUs the prime finding.

CPUs are also useful, welcome to another sprint :)

Mark

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby UBT - Chris » Thu Oct 26, 2017 2:37 pm

Hi Mark,

Thank you! I was hoping that would be the case, just wanted to check :) I have PG running on here now with network off for BOINC - I'll switch it on tomorrow am and let the tasks upload for the sprint :D I don't mind if I find a prime or not (although that would be cool!) - I just want to help the project and the team where possible :D

Thanks again - enjoy the sprint!
Chris
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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby Woodles » Thu Oct 26, 2017 2:40 pm

Hi Chris,

You're getting the hang of these sprints now :lol:

I think I've only found two primes in my years on PrimeGrid, one did briefly make the top 5000 list though :D

You too.

Mark

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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby chriscambridge » Thu Oct 26, 2017 3:16 pm

I have found a few primes, but none large enough to go in any list :(
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Re: Formula-BOINC Sprint #18 27th-30th Oct 2017

Postby chriscambridge » Thu Oct 26, 2017 4:19 pm

Surely the sprint starts at 5am GMT? (as it is stated as starting at 5.59am UTC, and UTC is one hour behind GMT)

https://time.is/UTC
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