PrimeGrid Races 2017

Discussion in 'Distributed Computing' started by Ken g6, Dec 29, 2016.

  1. Ken g6

    Ken g6 Programming Moderator, Elite Member
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    Current race: PSP LLR, April 7-22 (12:00 UTC)

    Welcome to another year of PrimeGrid races! Here's the (tentative) list of all races for this year:

    [​IMG]
    What you need:
    • One or more fast x86 processors. (Even slow ones might do!)
    • Windows (Vista or later 64-bit, or XP or later 32-bit), Linux, or MacOS 10.4+.
    • BOINC, attached to PrimeGrid (http://www.primegrid.com/).
    • Your PrimeGrid Preferences with only the above project(s) selected in the Projects section.

    What may help LLR (the central 6 races):
    • An Intel Sandy Bridge or later ("Core series" other than first-generation) processor with AVX may be 20-70% faster than with the default application. Sadly, that does not include Pentium or Celeron processors, or AMD processors.
    • Turning off hyper-threading. It really does help, even more than just doing half as much work as you have virtual cores.
    • Faster RAM might help on many races, as long as it's stable.
    • In certain races, usually those with longer WUs, it may help to enable multi-core processing with app_config.xml.
    • Juggling in some extra WUs may help in all races.
    What may help in other races:
    • A GPU helps in the last two races.
    • Turning on hyper-threading may help.
    • A 64-bit OS may help.

    What won't help (but won't hurt either):
    • A large amount of RAM.
    • Any Android devices.

    What won't help (and will hurt, sort of):
    • Unstable processors. (Invalid work will be deducted! :eek: If Prime95 worked recently on your processor, it should be stable.)
    • Work not downloaded and uploaded within the challenge. (It's not counted.) Should you not be able to be in front of one or more computers at that time, there are several options:
      • You can often set BOINC's network connection preferences to wait until a minute or two after race time.
      • And for short work units, you can just set the queue level very low (0.01 days). This also makes it more likely that you will be a prime finder rather than a double-checker. But you might want to raise their queue size after the challenge is underway.

    Welcome and good luck to all! :)

    P.S. If no one has posted stats lately, try tracking your stats with my user script. With that installed, visit the current race's Team stats link for TeAm stats.
     
    #1 Ken g6, Dec 29, 2016
    Last edited: Apr 18, 2017
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  3. TennesseeTony

    TennesseeTony Elite Member

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    Only two GPU races? :(

    And sheesh, three LONG races. At least the others are short.
     
  4. Ken g6

    Ken g6 Programming Moderator, Elite Member
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    I just noticed the start times vary a lot, too, for no apparent reason.
     
  5. petrusbroder

    petrusbroder Elite Member

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    Thanks a lot for the schedule. I don't know if I'll join, but the schedule makes it easier to plan.
     
  6. StefanR5R

    StefanR5R Senior member

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    After the December F@H adventure I planned to take my two dual-Xeon boxes off of DC for a while. But not having received the December power bill yet, and feeling kind of indebted to this Newton guy, I am on the edge. Or possibly already over the edge.
     
  7. Ken g6

    Ken g6 Programming Moderator, Elite Member
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    [​IMG] You know you're gonna have to face it, you're addicted to love DC. [​IMG] ;)
     
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  8. StefanR5R

    StefanR5R Senior member

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    I feel simultaneously encouraged and frightened.
     
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  9. StefanR5R

    StefanR5R Senior member

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    I checked a dual-socket Broadwell-EP for the effect of hyperthreading on GCW Sieve:
    HT off: 3705 s runtime, 3702 s CPU time per task (average of 28 tasks)
    HT on: 7237 s runtime, 7230 s CPU time per task (average of 56 tasks)
    hence, improvement of throughput with HT on: 2.4 %​
    This was "Generalized Cullen/Woodall (Sieve) v1.00" running on E5-2690 v4 @ 3.2 GHz.
     
  10. Ken g6

    Ken g6 Programming Moderator, Elite Member
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    And we're off!
     
  11. Orange Kid

    Orange Kid Elite Member

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    Yes we are :angry:
     
  12. TennesseeTony

    TennesseeTony Elite Member

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    Regrettably, my contribution to the CPU races will be limited. I and my CPUs are committed to fighting the Zika virus on WCG, as I have many family members and a daughter of child bearing age.

    I only have 3 of 8 cores to offer for a short time, on my primary Milkyway cruncher. (Which I hope to retire before this ten day race is up, pending me finding spare time to build Skeletor.)
     
  13. Ken g6

    Ken g6 Programming Moderator, Elite Member
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    Day 1 stats:

    Rank___Credits____Username
    11_____981236_____xii5ku
    159____81887______Orange Kid
    171____72621______Ken_g6
    183____66081______waffleironhead
    216____50255______GLeeM
    252____38218______geecee
    418____3282___10esseeTony

    Rank__Credits____Team
    6_____2014185____Duke University
    7_____1525923____[H]ard|OCP
    8_____1487447____Rechenkraft.net
    9_____1293583____TeAm AnandTech
    10____1248511____AMD Users
    11____1199660____BOINC@Poland
    12____1052341____Christians

    Tony's not doing much, but xii5ku (Stefan?) is making up for that pretty well. :) It looks like sieves do well with more cores thrown at them, almost regardless of the core's performance. So let's throw more cores at the problem!
     
  14. StefanR5R

    StefanR5R Senior member

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    Yep, xii5ku = StefanR5R. I am surprised to have landed at such a high individual rank, given that there are a bunch of participants who commandeer a whole fleet of DC nodes, whereas I just have my two dual-socket machines (and 4-5 normal PCs, depending on office hours and, as I have just noticed, depending on the occasional unexplained internet outage at the office).
     
  15. Ken g6

    Ken g6 Programming Moderator, Elite Member
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    That looks like a fleet to me, Stefan! I have 4 machines going, totaling 10 real cores. I might be able to add a few more.
     
  16. Ken g6

    Ken g6 Programming Moderator, Elite Member
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    Day 2 stats:

    Rank___Credits____Username
    12_____2006347____xii5ku
    77_____386684___10esseeTony
    167____177458_____Orange Kid
    189____150720_____Ken_g6
    204____133251_____waffleironhead
    224____117411_____geecee
    227____113036_____GLeeM
    382____27304______zzuupp

    Rank__Credits____Team
    7_____4897185____[H]ard|OCP
    8_____3598521____Duke University
    9_____3338269____Rechenkraft.net
    10____3112214____TeAm AnandTech
    11____2846270____BOINC@Poland
    12____2778230____AMD Users
    13____2365779____Christians

    Looks like Tony gave us the boost we needed to get into 10th. :)

    I also updated my user script linked from the first post to support https.
     
  17. TennesseeTony

    TennesseeTony Elite Member

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    I'll put about another days worth into it, if I can stand losing, lol, then back to WCG.
     
  18. StefanR5R

    StefanR5R Senior member

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    This was a 2x quadchannel DDR4 system. I now also checked a 1P singlechannel DDR3 system with an i7-4900MQ (mobile Haswell with 4C/8T):
    HT on, 4 concurrent tasks, 3.3 GHz average core frequency:
    3997 s runtime, 3996 s CPU time per task (average of 20 tasks)
    HT on, 8 concurrent tasks, 3.15 GHz average core frequency:
    7123 s runtime, 7112 s CPU time per task (average of 20 tasks)
    hence, improvement of throughput with hyperthreading: 12 %​
    Surprisingly, the HT benefit is even better than on the Broadwell-EP, even though this mobile CPU clocks down a little bit when subjected to 8 concurrent tasks.
    I did not bother to check whether I can switch HT off in the BIOS, AFAIR I can't do so on this laptop.
     
  19. Orange Kid

    Orange Kid Elite Member

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    Thanks for the updates.
    Tony you know you wanna, you know you wanna, you know you wanna

    trying a little forum hypnotics, probably won't work.:laughing::laughing:
     
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  20. StefanR5R

    StefanR5R Senior member

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    Perhaps my 2P boxes will still be available for DC for a certain time after the Newton Challenge is over. If so, then I'll see if I can produce as many WCG OpenZika credits as TennesseeTony's GCW Sieve credits from the Newton Challenge (converted 7:1 of course).
     
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  21. TennesseeTony

    TennesseeTony Elite Member

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  22. Ken g6

    Ken g6 Programming Moderator, Elite Member
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    Day 3 stats:

    Rank___Credits____Username
    12_____3126985____xii5ku
    50_____976503___10esseeTony
    178____273037_____Orange Kid
    184____257759_____geecee
    201____234275_____Ken_g6
    226____194422_____waffleironhead
    238____176936_____GLeeM
    310____105406_____zzuupp

    Rank__Credits____Team
    6_____13602435___Gridcoin
    7_____8978451____[H]ard|OCP
    8_____5378034____Rechenkraft.net
    9_____5345326____TeAm AnandTech
    10____4651231____BOINC@Poland
    11____4416119____AMD Users
    12____3852378____Christians

    Geecee brought some more power to the party and passed me. He might be about to pass Orange Kid too!

    And we're really close to Rechenkraft.net.
     
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  23. geecee

    geecee Platinum Member

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    Thanks for the stats Ken. Since it's winter, I threw all my boxes into it starting yesterday. So you've got my motley assortment of 12 old sandy/ivy bridge cores, and 2 haswells. Only box I have left is an old X6 box that I haven't booted up in a while. Would it be of any use? My kvm and spare monitor are all connected, so I'll probably have to hook that up to a TV or something lol.
     
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  24. TennesseeTony

    TennesseeTony Elite Member

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    Thanks for the organization and stats, Ken!

    I am humbled that you would contribute to fighting the Zika virus so that I may participate in the PrimeGrid challenge! I don't know what to say except...Thanks! :)

    I am assuming this indicates that you'd like me to continue with PrimeGrid. Be aware though that PrimeGrid awards far more points than WCG, and even your fleet would produce perhaps only 80,000 (after the division) points per day running WCG. So perhaps a time based contribution is more appropriate.

    That said, I hope you get some work for your rigs! Good to have some income I imagine. :)
     
  25. StefanR5R

    StefanR5R Senior member

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    Nice... TeAm's credits/day:
    day 1: 1.3 M
    day 2: 1.8 M
    day 3: 2.2 M​
    According to the challenge forum thread, the percentage of validated work of all returned work was globally:
    day 1: 51 %
    day 2: 64 %
    day 3: 73 %​
    Assuming that percentage is also true for the TeAm's returned tasks, then our daily sum of pending + validated credits/day would be:
    day 1: 2.5 M
    day 2: 2.8 M
    day 3: 3.1 M​
    i.e. 10 % ramp up from day to day so far, if this extrapolation isn't totally off.

    Duke University dropped from 8th to 13th, I hope they are alright... http://emergency.duke.edu/

    Well, I leave it entirely to your judgment, and to Orange Kid's psychic powers. :) I was just excited about the TeAm's figures on day 2.

    Whoops, I wasn't aware of that. I'll see how that pans out. Now that you pointed it out - I actually did a brief warm-up with WCG (all subprojects mixed) shortly before the PG race, and the peak day had 318,000 WCG-credits/day for 56 days CPU-time/day.
    (edit)
    Looking at stats.free-dc.org, Jan 6 of 10esseeTony at PG is 9 times worth of Jan 3 of xii5ku at WCG. :eek: Credit for credit, it'll be tough to match indeed.
     
    #24 StefanR5R, Jan 6, 2017
    Last edited: Jan 6, 2017
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  26. Orange Kid

    Orange Kid Elite Member

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    Thanks for the stats

    An X6.........no, no ,no that's no good, especially if you hook it up to a TV.;) Oh wait that's what's running in the family room.:eek::)