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World Community Grid Forums
Category: Active Research
Forum: OpenPandemics - COVID-19 Project
Thread: OpenPandemics - COVID-19 on Raspberry Pi |
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Thread Status: Active Total posts in this thread: 35
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mwroggenbuck
Advanced Cruncher USA Joined: Nov 1, 2006 Post Count: 85 Status: Offline Project Badges: 
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I purchased one of the Pi 400 and have been very impressed. I wish I had had something like that growing up. From a open pandemics point of view, it appears to be working fine. I had an old laptop (Core Duo, which is basically a Pentium). It would draw approximately 40 watts. The Pi 400 draws about 7 watts (at full cpu utilization). I am still scratching my head over this (and I really need to confirm it), but it looks like the Pi 400 is doing twice the work on 1/5 of the power.
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BobbyB
Veteran Cruncher Canada Joined: Apr 25, 2020 Post Count: 638 Status: Offline Project Badges: 
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My reply is here:
https://www.worldcommunitygrid.org/forums/wcg/viewpostinthread?post=651014 And to get just one device go to: My Contribution/Device Statistics and click on one device. Shows points per day (14). This is what I use. |
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mwroggenbuck
Advanced Cruncher USA Joined: Nov 1, 2006 Post Count: 85 Status: Offline Project Badges:
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I have done a rough comparison between my Intel i9 and my Raspberry Pi. The i9 uses approximately 10 watts per CPU. The Pi uses approximately 1.75 watts per CPU. Using these numbers, and how long it takes for the each CPU to do the same amount of work, I estimate that that Pi requires about 2/3 of the energy (length of time * power) of the i9.
I though I would post this just in case anyone was interested. These are rough numbers, but I believe them to be in the ball park. |
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olebole
Cruncher Joined: Nov 25, 2004 Post Count: 12 Status: Offline Project Badges: 
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I built a tower with 12 PI4's. All with heatsinks and 3 120mm fans to keep them all cool. They boot and run diskless off of one of the PI's who serve as boot and fileserver (while crunching itself).
This uses in total 66 Watt. 5,5 Watt pr. PI. Each Pi crunches 4 WU's at a time, taking around 9 hours per unit. I have tested a few desktops and laptops, and for OPN1 points per watthour, nothing beats the PI4. |
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BQL_FFM
Cruncher Germany Joined: Jun 16, 2016 Post Count: 15 Status: Offline Project Badges:
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My 3A+ is coming this week.
@Tony: I want to try to run 4 tasks. Is this working? J. |
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1684 Status: Offline Project Badges: 
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Hi BQL_FFM,
----------------------------------------currently I run 2 RPi 3 with 4 tasks each and remaining <65°C (Winter here). You have only to extend the swap space (swapfile) at least to 256 MB; on my side I configured 512 MB swap space. I recommend you to install RPi Monitor on each RPi for monitoring CPU temperature, CPU load, and memory usage. Cheers, Yves |
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TonyEllis
Senior Cruncher Australia Joined: Jul 9, 2008 Post Count: 286 Status: Offline Project Badges: 
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My 3A+ is coming this week. @Tony: I want to try to run 4 tasks. Is this working? Yes - all 3 of my Pis are running 4 tasks. The 3A+ currently runs Pi-hole and Boinc For many details regarding this machine refer to Pi 3A+
Run Time Stats https://grassmere-productions.no-ip.biz/
----------------------------------------[Edit 1 times, last edit by TonyEllis at Feb 3, 2021 8:42:28 PM] |
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1684 Status: Offline Project Badges:
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@TonyEllis,
----------------------------------------What SD card do you use for the RPi? Or do you use a remote filesystem for them? Cheers, Yves |
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TonyEllis
Senior Cruncher Australia Joined: Jul 9, 2008 Post Count: 286 Status: Offline Project Badges:
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@KerSamson asked :-
----------------------------------------What SD card do you use for the RPi? 2x Pi 3B+ each have a Sandisk Extreme 32 GB SD (and WDC 240 GB Green SSD) Pi 3A+ has a Sandisk Ultra 16 GB SD (and Intel 330 120GB SSD) The SD cards get very little use as they effectively only contain /boot, all subsequent filesystem I/O uses the SSDs. ( /boot/cmdline.txt is "console=serial0,115200 console=tty1 root=/dev/sda1 ... ") The 3A+ has a Genesys Logic, Inc. 4-port hub plugged into its single USB port. This hub actually has 3 USB ports and an integrated USB Ethernet NIC. This USB hub gets all its power from the Pi. All 3 each have a Technology Corp. JMS567 SATA/USB 6Gb/s bridge to connect the SSD to a USB port. Each SSD is powered from the USB cable only. They were chosen for their low power usage. Typical "hdparm -t" figures SSD: 27.99 MB/sec (The Pi 3xx only has USB2) SD card: 22.17 MB/sec
Run Time Stats https://grassmere-productions.no-ip.biz/
----------------------------------------[Edit 2 times, last edit by TonyEllis at Feb 4, 2021 1:55:31 AM] |
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BQL_FFM
Cruncher Germany Joined: Jun 16, 2016 Post Count: 15 Status: Offline Project Badges:
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Indeed. Faster and cheaper. LOL
 Pi 4 model A+ would be nice. Cheers. |
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