Projects that support Raspberry Pi

[zombie67]

Not sure where this should be posted. I guess this place will do.

Some apps are 32 bit, some 64 bit (aarch64). You can run 32bit apps on a 64 bit OS by adding to your cc_config.xml. See later post.

Not all of these apps always have work.

Project			Application				Pi app?
Amicable Numbers	Amicable Numbers up to 10^21		Yes
Asteroids@home		Period Search Application		Yes
Einstein@Home		Binary Radio Pulsar Search (Arecibo)	Yes
GoofyxGrid@Home		Monkeys v1				Yes
GoofyxGrid@Home		Monkeys v2				Yes
GoofyxGrid@Home		Monkeys v3				Yes
GoofyxGrid@Home		Monkeys v4				Yes
iThena			iThena CNode				Yes
LHC@home		sixtract				Yes
Rosetta@home		Rosetta					Yes
Ralph@home		Rosetta					Yes
T.Brada Experiment Grid	PADLS Total				Yes
T.Brada Experiment Grid	Symmetric Prime Tuples			Yes
T.Brada Experiment Grid	Lua Alfa				Yes
TN-Grid Platform	gene@home PC-IM				Yes
Universe@Home		Universe BHspin v2			Yes
Universe@Home		Universe ULX				Yes
Universe@Home		Neutron Star and Black Hole formation	Yes
wanless2		Random-base WEP Factorization		Yes
World Community Grid	Beta Test				Sometimes
World Community Grid	OpenPandemics - COVID 19		Yes
WUProp@Home		Data collect version 4			Yes
yoyo@home		Cruncher ogr				Yes
yoyo@home		ecm					Yes
yoyo@home		ecm P2					Yes
yoyo@home		M Queens				Yes
yoyo@home		Siever					Yes

[zombie67]

Some tips running 64 bit. This definitely applies to Raspberry Pi 4, running Raspberry Pi OS (64 bit version). These may apply to other 64 bit versions of linux too, but I haven't tested any of them yet. Also, may apply to other ARM machines, but I don't have any to try.:

- Add these to your cc_config.xml, so that your 64bit OS will request 32bit apps, if necessary:

<alt_platform>arm-unknown-linux-gnueabihf</alt_platform>
<alt_platform>armv7l-unknown-linux-gnueabihf</alt_platform>

- With 64bit linux on intel/amd, in order to run some of the 32bit apps, you also need to add the 32bit libraries (ia32-libs). Similar situation with 64bit linux on ARM. To do that:

sudo dpkg --add-architecture armhf
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install libc6:armhf libstdc++6:armhf
sudo reboot

- For Einstein in particular, even doing all of the above doesn't prevent the tasks to error out on the "Binary Radio Pulsar Search (Arecibo)" sub-project. Apparently there is some issue with the app from the project. So manually add a custom-built application and app_info.xml:

cd /var/lib/boinc-client
sudo wget http://kerbodyne.com/einstein/einstein_64bit_0.13.tar
sudo tar -xvf einstein_64bit_0.13.tar
sudo systemctl restart boinc-client

[zombie67]

Updated the original post of projects/apps.

[zombie67]

Some Raspberry Pi management tips.

I have monitor, keyboard, and mouse connected physically during initial boot and set up. Then I disconnect all that hardware. I manage them only over network after that.

To enable ssh:
Menu -> preferences -> Raspberry Pi Configuration -> Interfaces -> ssh (enable)
(Also, change host name here under system tab, if you want)

Then from a terminal on my mac:
ssh -Y pi@192.168.7.111 (replace with whatever the IP address of your machine is)

you will be asked to allow whatever, and reply with "yes".

Once logged into your raspberry pi, you can type the following commands:
To display GUI: startlxde-pi
To display CPU freq: watch -n 1 vcgencmd measure_clock arm
To display CPU temp: /opt/vc/bin/vcgencmd measure_temp

To make those commands easier

Create command line aliases, add these lines to your .bash_aliases on your raspberry pi. I use vi, but whatever command line editor you like will do the trick.
alias freq='watch -n 1 vcgencmd measure_clock arm'
alias temp='watch -n 1 vcgencmd measure_temp'
alias gui='startlxde-pi'

To overclock, you *really* need a kit of heatsinks and a case with a fan. But take heart! You can buy them for only a few dollars.:

https://magpi.raspberrypi.org/articl...raspberry-pi-4

Raspberry Pi OS:
sudo vi /boot/config.txt

Ubuntu and their variants:
/boot/firmware/config.txt (or maybe /boot/firmware/usrconfig.txt)

From this:
#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

To this:
#uncomment to overclock the arm. 700 MHz is the default.
over_voltage=2
arm_freq=1750

Or to this:
over_voltage=6
arm_freq=2000

After every change:
sudo reboot

There is a hard limit at 80 degrees. It throttles at that point, so that is why you want to monitor temps until you understand the heat range of your Raspberry Pi.

And the apps are not equal with regard to temp! Rosetta runs about 5 degrees higher than the others as I write this.

FWIW, when temps get high, the wifi tends to fail. So it looks like the machine is dead when using a bionic management app like BOINCtasks. But the Pi has just dropped wifi connection. So I use the hard-wired ethernet instead, and that is rock-solid.

Stressberry to stress-test for the Raspberry Pi:
https://pypi.org/project/stressberry/

[zombie67]

A couple more points, that were not made clear in the previous post:

To learn the IP address of your Raspberry Pi, in a terminal: ifconfig -a

In order to do the ssh stuff, and then display the Raspberry Pi GUI desktop on your Mac, you must install XQuartz (an X windows system) on your Mac. I assume you have to have something similar for it to work on your windows machine too.

https://www.xquartz.org

[Ron Shurtz]

I have my Raspberry Pi 3 in a case that includes a dedicated 7" touch screen.

Ron RBP3.jpg


But, I found on Windows, I can access the GUI on the Pi remotely using TeamViewer.
(You can see the TeamViewer icon in the lower right corner of the Pi screen in the picture.)
I may try messing with a RP4 sometime in the future.

[zombie67]

Here is my mini farm.

[Dave gpu]

Boy thats not a farm that's ART It needs to be on YouTube.

[Ron Shurtz]

Cool!
Nice setup.
Five slices of Pi.

What temps are you getting with those fans and heatsinks?

[zombie67]

Cool!
Nice setup.
Five slices of Pi.

What temps are you getting with those fans and heatsinks?

It *really* depends on the apps running. For Einstein Binary Radio Pulsar Search (Arecibo), mid 50s. For Rosetta, 65-75. FWIW, adding a small external USB fan drops the temps about 5 degrees.

My machines are running at 2000 mhz and a voltage setting of 6.

over_voltage=6
arm_freq=2000

I changed the layout a bit, to accommodate the fan.