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Message boards : Cullen/Woodall prime search : PowerMac G4 Dual 1.25 MDD not finishing by deadline ???

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Matevz Markovic
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Joined: 4 Feb 11
Posts: 3
ID: 84721
Credit: 14,566,745
RAC: 0
321 LLR Silver: Earned 100,000 credits (132,248)Cullen LLR Bronze: Earned 10,000 credits (96,282)PPS LLR Silver: Earned 100,000 credits (381,970)SoB LLR Silver: Earned 100,000 credits (176,520)TRP LLR Bronze: Earned 10,000 credits (73,661)Woodall LLR Bronze: Earned 10,000 credits (63,285)Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (582,404)PPS Sieve Jade: Earned 10,000,000 credits (11,971,633)TRP Sieve (suspended) Silver: Earned 100,000 credits (263,118)GFN Gold: Earned 500,000 credits (814,318)
Message 32139 - Posted: 5 Feb 2011 | 10:30:33 UTC

Hy!

Yesterday I joined the C/W prime search. After 8 hours of crunching, 4.697% is done!!? I fear that I am not going to finish till deadline, which is the 11th of February.

I am running OS X 10.4 server (10.4.11), and it is always on, just for this task. I configured it so that it will never sleep, 100% of both cpus is utilized. When I look at the process table I see that about 85% of time is spent nice-ing the process, instead of crunching the primes (blue color instead of green, if that helps).

Please help me solve this issue. I really want to participate in this project, and I think that my old Powermac is still not too old for this. After all, I was computing gaussian integers and twin primes on it and it performed in pair (when the application was optimized for the G4) with much "faster" and newer computers.

Thanks for your answers!
____________

Profile Gary Craig
Volunteer tester
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Joined: 30 Dec 09
Posts: 2850
ID: 52890
Credit: 738,929,697
RAC: 26,326
321 LLR Ruby: Earned 2,000,000 credits (2,267,162)Cullen LLR Ruby: Earned 2,000,000 credits (2,277,342)ESP LLR Ruby: Earned 2,000,000 credits (3,085,940)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (794,592)PPS LLR Turquoise: Earned 5,000,000 credits (5,347,108)PSP LLR Ruby: Earned 2,000,000 credits (4,953,171)SoB LLR Ruby: Earned 2,000,000 credits (2,194,447)SR5 LLR Ruby: Earned 2,000,000 credits (3,573,827)SGS LLR Ruby: Earned 2,000,000 credits (3,103,297)TRP LLR Jade: Earned 10,000,000 credits (10,177,325)Woodall LLR Ruby: Earned 2,000,000 credits (2,100,141)321 Sieve (suspended) Silver: Earned 100,000 credits (200,818)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (59,788,598)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,056,778)PPS Sieve Double Silver: Earned 200,000,000 credits (447,302,746)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,130,821)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,074,710)AP 26/27 Silver: Earned 100,000 credits (227,004)GFN Double Bronze: Earned 100,000,000 credits (106,895,222)PSA Emerald: Earned 50,000,000 credits (62,378,755)
Message 32267 - Posted: 7 Feb 2011 | 9:10:16 UTC - in response to Message 32139.

I discovered PrimeGrid about a year ago with an iMac which at the time was a few months old. Then, and now, it runs PG fine (although it is outclassed today by far for GPU work). At some point I thought I'd try attaching my much older mac cube (G4, 450Mhz), which until then had been running seti@home for years. It downloaded only CW Sieve work and I had the same experience as you... it was way too slow, and would not meet deadlines. I gave up on that machine and stick with newer Intel and AMD boxes. Sorry, no good news here.

As for the "blue vs. green" issue, I don't think that's a problem. The processes that actually do the crunching normally run "nice", and that's the blue color. It's not extra overhead. The "green" processes are the real overhead, like the boinc manager itself.

--Gary

Iain BethuneProject donor
Volunteer moderator
Volunteer developer
Volunteer tester
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Joined: 28 Jan 09
Posts: 1507
ID: 34775
Credit: 176,524,812
RAC: 12,133
321 LLR Gold: Earned 500,000 credits (537,871)Cullen LLR Gold: Earned 500,000 credits (621,687)ESP LLR Ruby: Earned 2,000,000 credits (3,714,230)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,443,248)PPS LLR Amethyst: Earned 1,000,000 credits (1,024,781)PSP LLR Sapphire: Earned 20,000,000 credits (28,367,849)SoB LLR Ruby: Earned 2,000,000 credits (2,869,428)SR5 LLR Turquoise: Earned 5,000,000 credits (5,189,992)SGS LLR Amethyst: Earned 1,000,000 credits (1,243,828)TRP LLR Turquoise: Earned 5,000,000 credits (5,169,405)Woodall LLR Amethyst: Earned 1,000,000 credits (1,070,956)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,003)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,371)Generalized Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (11,643,386)PPS Sieve Turquoise: Earned 5,000,000 credits (7,492,709)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,017,144)TRP Sieve (suspended) Gold: Earned 500,000 credits (554,946)AP 26/27 Ruby: Earned 2,000,000 credits (3,577,848)GFN Emerald: Earned 50,000,000 credits (96,553,628)PSA Ruby: Earned 2,000,000 credits (3,210,273)
Message 32839 - Posted: 14 Feb 2011 | 9:06:57 UTC - in response to Message 32267.

Hi, I used to run a G4 PowerMac, and although I ported the GCWSieve app, it doesn't perform well compared to the Intel Macs (or Win/Linux), especially now that we have GPU Sieving, it doesn't appear to be worth the effort.

Your best bet is running PPS tests on PRPNet using the phrot application, which does pretty well on the G4.

Cheers

- Iain

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Message boards : Cullen/Woodall prime search : PowerMac G4 Dual 1.25 MDD not finishing by deadline ???

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