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World Community Grid Forums
Category: Active Research
Forum: Africa Rainfall Project
Thread: The slowest ARP1-task/device |
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Thread Status: Active Total posts in this thread: 17
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BobbyB
Veteran Cruncher Canada Joined: Apr 25, 2020 Post Count: 638 Status: Offline Project Badges: 
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I'll do that, but I fear that will be one bridge too far, for that old machine. My i5 M520 regularly takes over 4 days (96 hours). I don't use it for ARP during hot periods as it shuts itself down too often I don't let my old machines (2) do ARP. After participating in a thread in the hardware forum about PI's, I actually decommissioned one klunker. Just a waste of power for what it could do (compared to a PI). So I gave their ARPs to my Ryzen 9 but still less than half of total threads -1.Why favour ARP over others? [Edit 1 times, last edit by BobbyB at Oct 19, 2021 3:19:02 PM] |
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Grumpy Swede
Master Cruncher Svíþjóð Joined: Apr 10, 2020 Post Count: 2494 Status: Recently Active Project Badges: 
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And the result of the test with ancient equipment is in:
----------------------------------------Q8200 4GB, 1 ARP, 3 MCM1, and the ARP runtime was 37 hours, 41 minutes, and 23 seconds. Validated just fine. https://www.worldcommunitygrid.org/contribution/workunit/850098688 This was just a fun test, with a computer that's normally shut down, and put away. [Edit 1 times, last edit by Grumpy Swede at Oct 20, 2021 2:45:35 AM] |
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spRocket
Senior Cruncher Joined: Mar 25, 2020 Post Count: 280 Status: Offline Project Badges:
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For those running on RAM-limited machines under Linux, zram-swap is your friend:
https://github.com/foundObjects/zram-swap It sounds crazy to carve off some RAM, turn it into compressed swap space, and forgo disk-based swap, but in practice it works beautifully, even on a 1GB Raspberry Pi 3. When OPN1 had their recent hiccup with oversized units, the Pi 3s handled it well. On the other hand, my slowest PCs have 8 GB RAM, so I don't have to take that step, but a throttled i7 L 640 is still shockingly slow. ARP1_0030901_095_1 crawled through in 75.22 hours CPU/75.98 elapsed. |
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nyanthiss
Cruncher Joined: Nov 23, 2012 Post Count: 15 Status: Offline Project Badges: 
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I have a router (APU 2c4, CPU: AMD Embedded G series GX-412TC) where i have a few small apps, and since it has 4GB memory, and i have tried to run some BOINC tasks on it with low priority. ARP's runtime is about 4 days (= 96 hours). Yeah it's slow but... it's always on anyway, and the extra power usage from load is maybe 1-2 watts, so it might as well run BOINC in background. And MCM doesn't work well on it.
----------------------------------------@spRocket: i7 640 is old, but 75 hours sounds like something is badly misconfigured. The GX-412TC in my router runs on average frequency maybe 800mhz, has single-channel DDR3, and it does ARP tasks in 96 hours.
Intel Xeon E3-1231 v3
AMD A10 7800 AMD Ryzen 5 3500U AMD Ryzen 1700X AMD Ryzen 5900X 2x RaspberryPi, 1x Odroid |
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spRocket
Senior Cruncher Joined: Mar 25, 2020 Post Count: 280 Status: Offline Project Badges:
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The i7s (two of them, both in ThinkPad x201 Tablets) throttle down to 1.2 GHz, vs. 2.13 GHz at full speed. I'm running them in the normal mode, which throttles aggressively. There's a performance mode in the BIOS that would give me more, but then they run at 99°C, one degree shy of forced shutdown. In normal mode they stay at about 82°.
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Grumpy Swede
Master Cruncher Svíþjóð Joined: Apr 10, 2020 Post Count: 2494 Status: Recently Active Project Badges:
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And the result of the test with ancient equipment is in: Q8200 4GB, 1 ARP, 3 MCM1, and the ARP runtime was 37 hours, 41 minutes, and 23 seconds. Validated just fine. https://www.worldcommunitygrid.org/contribution/workunit/850098688 This was just a fun test, with a computer that's normally shut down, and put away. And the second ARP, ARP1_0019681_097_0 took longer time to crunch, than the first one. 40 hours, 47 minutes, 52 seconds. With that, the fun experiment with this old computer will be over, and it will be turned off again. Goodnight again, old Vista computer. Sleep tight.  |
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maeax
Advanced Cruncher Joined: May 2, 2007 Post Count: 144 Status: Offline Project Badges: 
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Have a 16 Year old PC with first APU from AMD, running first with Vista and now with Win10pro, no ARP but sometime MCM or Covid-19 (CPU), atm Cosmology.
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AMD Ryzen Threadripper PRO 3995WX 64-Cores/ AMD Radeon (TM) Pro W6600. OS Win11pro
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