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[PrimeGrid] Good Riddance 2020! Challenge starts January 14th

Posted: Mon Jan 11, 2021 12:08 pm
by BOINC_News
The first challenge of the 2021 Series will be a 5-day challenge celebrating the end of the abomination which was the year 2020. The challenge will be offered on the PPS-DIV (LLR) application, beginning 14 January 00:00 UTC and ending 18 January 23:59 UTC. To participate in the Challenge, please select only the Fermat Divisor Search LLR (PPS-DIV) project in your PrimeGrid preferences section. Comments? Concerns? Discuss on the forum post for this challenge. Best of luck!

Source: http://www.primegrid.com/forum_thread.php?id=9528

Re: [PrimeGrid] Good Riddance 2020! Challenge starts January 14th

Posted: Thu Jan 14, 2021 11:04 am
by crashtech
I'm not sure if this is a good place to put this, but I am wondering why this computer:

http://www.primegrid.com/show_host_deta ... tid=533260

Is taking 8 hours to finish WUs! It is a little underclocked, to 3.6GHz I believe, and running 6 tasks of 1 thread each. If this keeps up, I'm going to have it do other things instead!

Re: [PrimeGrid] Good Riddance 2020! Challenge starts January 14th

Posted: Thu Jan 14, 2021 12:35 pm
by emoga
@crashtech The i7-8700K only has 12MB of L3 cache. Each DIV task currently requires 3.5MB, therefore its not able to run all tasks from L3 cache alone.

Try running 3 tasks of 4 threads.

Great job in the challenge by the way ;)

Re: [PrimeGrid] Good Riddance 2020! Challenge starts January 14th

Posted: Thu Jan 14, 2021 1:35 pm
by crashtech
emoga wrote:
Thu Jan 14, 2021 12:35 pm
@crashtech The i7-8700K only has 12MB of L3 cache. Each DIV task currently requires 3.5MB, therefore its not able to run all tasks from L3 cache alone.

Try running 3 tasks of 4 threads.

Great job in the challenge by the way ;)
Aww, crap. I forgot about the stupid anemic cache! Thanks, and thanks! :)

Re: [PrimeGrid] Good Riddance 2020! Challenge starts January 14th

Posted: Sat Jan 16, 2021 12:48 pm
by Skillz
Didn't realize the team was running this. I switched some of my rigs over to it late last night.