Primegrid 2020 Challenge #1

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Gibson Praise
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#1 Primegrid 2020 Challenge #1

Post by Gibson Praise » Sat Jan 18, 2020 2:43 am

Date: 24-Jan-2020, 00:00:00 UTC to 25-Jan-2020 00:00:00 UTC
Project: 321-sieve (CPU only)

As with all PG Challenges, only workunits downloaded after the start of the challenge and completed and returned by the end of the challenge are valid (double-check validation not required).

This is the first of nine challenges this year, the only 1-day challenge in the series ( http://www.primegrid.com/challenge/challenge.php ), and the only one till mid-March.

Workunits are quick ( under 10 min on EYPC 7281 @ 2.1ghz, under 3 min on i9-9900K @ 3.6ghz edit: wrong sieve / wrong times/ right clown. corrected: 1hr 10min - EPYC, 50 min - i9 ) and are best run with hyper-threading on ( as opposed to most PG cpu apps which use the LLR algorithm and prefer HT off ). edit: 609.89 pts / wu

Please feel free to join me in this inaugural challenge,
g
Last edited by Gibson Praise on Wed Feb 12, 2020 6:59 am, edited 2 times in total.
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#2 Re: Primegrid Challenge #1

Post by scole of TSBT » Sat Jan 18, 2020 3:18 am

Perfect. I need less than 5k hours to get WUProp lime 25k hours on that app.
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#3 Re: Primegrid Challenge #1

Post by davidBAM » Sat Jan 18, 2020 12:01 pm

Dipping a toe in the water now. Any reason not to run all available threads? That is, is there a minimum RAM or L3 Cache bottleneck that you know of on larger machines?

ETA : low RAM requirement (137M on Linux)
I think this is fool-proof but could you just try it for me please? • There are 10 types of people in the world; those who understand binary, and those who don’t
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#4 Re: Primegrid Challenge #1

Post by davidBAM » Sat Jan 18, 2020 3:00 pm

Gibson Praise wrote:
Sat Jan 18, 2020 2:43 am
50 min - i9
Yup - same on 3990X https://tsbt.co.uk/forum/viewtopic.php? ... 758#p79758

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#5 Re: Primegrid Challenge #1

Post by davidBAM » Thu Jan 23, 2020 1:24 am

reminder - starts at midnight UTC

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#6 Re: Primegrid Challenge #1

Post by scole of TSBT » Thu Jan 23, 2020 2:49 am

Ready!

For maximum credit during the challenge, clear your cache before the start and don't download any new WU until after the start. It's only a 24 hour challenge so it will make a difference.
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#7 Re: Primegrid Challenge #1

Post by scole of TSBT » Fri Jan 24, 2020 12:10 am

Time to go!

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#8 Re: Primegrid Challenge #1

Post by davidBAM » Fri Jan 24, 2020 12:25 am

I am fully loaded. About 20mins until first WUs turned in

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#9 Re: Primegrid Challenge #1

Post by Bryan » Fri Jan 24, 2020 1:52 am

Somebody get a picture ... we're in 3rd.
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#10 Re: Primegrid Challenge #1

Post by davidBAM » Fri Jan 24, 2020 1:57 am

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#11 Re: Primegrid Challenge #1

Post by Gibson Praise » Fri Jan 24, 2020 4:43 am

davidBAM wrote:
Fri Jan 24, 2020 1:57 am
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.. and still in third :shock: :dance:
and on the individual side davidBAM continues to hold first with Bowmore close behind p10
:clap:
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#12 Re: Primegrid Challenge #1

Post by davidBAM » Fri Jan 24, 2020 4:49 am

Hmm ... no denying first place individual be nice. Maybe some of the Pros will just hire clout from Amazon Web Services though?

Third placed team will ruffle feathers

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#13 Re: Primegrid Challenge #1

Post by Gibson Praise » Fri Jan 24, 2020 5:31 am

There is an entire thread devoted to Google CoLab http://www.primegrid.com/forum_thread.p ... 839#135424 .. mostly devoted to GPU use. Haven't seen anyone try to abuse the CPUs yet.

On a one day challenge I think we might catch them by surprise.

edit: Woohoo! I am back into the top 50 - which for me is fabulous!

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#14 Re: Primegrid Challenge #1

Post by Bryan » Fri Jan 24, 2020 6:56 am

I'm starting to get run over! We're still holding 3rd though.
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#15 Re: Primegrid Challenge #1

Post by davidBAM » Fri Jan 24, 2020 12:21 pm

Bryan wrote:
Fri Jan 24, 2020 6:56 am
I'm starting to get run over!
Me too

We are about to drop to 5th. Any assistance greatly appreciated

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#16 Re: Primegrid Challenge #1

Post by jockmacmad2 » Fri Jan 24, 2020 1:40 pm

Hmmm I'm running 321-sieve but I don't seem to be showing on the Challenge page for the team (or as an individual for that matter).

Checked on the Primegrid Account Page and I am deffo showing as TSBT.

According to BAM (not David) I have done 195,773 so far today.
Last edited by jockmacmad2 on Fri Jan 24, 2020 1:44 pm, edited 1 time in total.
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#17 Re: Primegrid Challenge #1

Post by davidBAM » Fri Jan 24, 2020 1:51 pm


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#18 Re: Primegrid Challenge #1

Post by davidBAM » Fri Jan 24, 2020 2:34 pm

We dropped to 5th - now back at 4th. I've even got 8WU running on my laptop but I doubt if that is the reason.

Laptop crunching not recommended, I know

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#19 Re: Primegrid Challenge #1

Post by Gibson Praise » Fri Jan 24, 2020 6:38 pm

If you can crunch on the laptop, well I just started an old i7-3770. Might get ten or twenty workunits.

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#20 Re: Primegrid Challenge #1

Post by davidBAM » Fri Jan 24, 2020 6:39 pm

:clap: We are just a tad competitive on here :D

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