Raspberry Pi & Other SBC Computers Discussion Thread :)

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Profile Siran d'Vel'nahr
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Message 1987833 - Posted: 29 Mar 2019, 20:20:51 UTC - in response to Message 1987831.  

The app_config.xml goes in the seti project directory, not BOINC.

Hi Brent,

I am not finding a projects directory at all. I only find the /etc/boinc-client directory and that is where cc_config.xml is located. I'm at a loss... :\

Have a great day! :)

Siran

[edit]
I finally found it. It's in /var/lib/boinc... . Now I gotta wait to run outta WUs before putting the app_config.xml file there. Now I know where to go. :)
[/edit]

Not sure which host you are referencing. A Linux host or a Pi host. Anyway, the projects directories are in the other boinc-client directory located at /var/lib/boinc-client/projects/setiathome.berkeley.edu.

Hi Keith,

The new Linux box I built. In /var/lib... there is /boinc and /boinc-client. The /boinc directory has an arrow on it. Does that mean it is pointing to /var/lib/boinc-client or somewhere else? Both /boinc and /boinc-client contain the same files. Makes no sense in having a directory point to another directory that contains the same stuff. ;)

Have a great day!

Siran
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Message 1987835 - Posted: 29 Mar 2019, 20:36:52 UTC - in response to Message 1987833.  

The new Linux box I built. In /var/lib... there is /boinc and /boinc-client. The /boinc directory has an arrow on it. Does that mean it is pointing to /var/lib/boinc-client or somewhere else? Both /boinc and /boinc-client contain the same files. Makes no sense in having a directory point to another directory that contains the same stuff. ;)

Yes it does. Especially so for Linux. Linux uses lots of symbolic links which are sort of aliases pointing a copy of a file to the original. No point in duplicating the file over and over again in multiple directories for some program that needs access to the file. So a symbolic link is created which is just a pointer to the original. Much smaller in size. The "boinc" directory is just the "common name" version for the project without getting into the specifics that the program is actually installed into boinc-client. Just one of the confusing aspects of the distro versions of boinc. Why I like the TBar versions of BOINC. Everything all in one place with me as the owner.
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Message 1987963 - Posted: 30 Mar 2019, 12:25:16 UTC - in response to Message 1987810.  

The new Odroid SBC has a RJ-45 ethernet port. But I don't have any more ethernet ports near it to connect to. I would have to either run a new cable across half the house and two bedrooms to get to a router or switch. Or upgrade the fully occupied 5 port switch 3 inches away from the rpi3 SBC to an 8 port switch which obviously would be the easiest. There is the extra $40 buck in project cost I defined in my OP.


The gadget I spoke off replaces a Wifi device by being powered by a USB port and plugging into an RJ47 port. There is no driver(s) needed because it is smarter than your average "dongle" :)

It does not need another port off your switch. Just the usual WiFi connection. Yes, you have to set it up because it doesn't talk to your OS at all. Except to send it the equivalent of hardwired communications.

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Message 1988000 - Posted: 30 Mar 2019, 15:46:04 UTC - in response to Message 1987963.  

The gadget I spoke off replaces a Wifi device by being powered by a USB port and plugging into an RJ47 port. There is no driver(s) needed because it is smarter than your average "dongle" :)

Guess I still haven't made you understand. So what good is converting a USB port on the Odroid to a RJ-45 jack if there is no matching available RJ-45 jack on the switch to plug it into? Or do you think that a switch has USB ports to convert to a RJ-45 jack? A switch is just a box with RJ-45 jacks. No other ports or connections.
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Message 1988009 - Posted: 30 Mar 2019, 16:21:16 UTC - in response to Message 1988000.  
Last modified: 30 Mar 2019, 16:22:38 UTC

The gadget I spoke off replaces a Wifi device by being powered by a USB port and plugging into an RJ47 port. There is no driver(s) needed because it is smarter than your average "dongle" :)

Guess I still haven't made you understand. So what good is converting a USB port on the Odroid to a RJ-45 jack if there is no matching available RJ-45 jack on the switch to plug it into? Or do you think that a switch has USB ports to convert to a RJ-45 jack? A switch is just a box with RJ-45 jacks. No other ports or connections.


I think you missed the bit where he says it uses Wi-Fi.

It makes the RJ-45 port on the odroid think it is plugged into a switch, but the device uses the USB for power and basically makes a standard LAN port into Wi-Fi

Something like this I suspect

https://www.amazon.co.uk/Generic-Bridge-Convert-RJ45-Ethernet-Wireless/dp/B01HMJ5CFO
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Message 1988011 - Posted: 30 Mar 2019, 16:27:24 UTC - in response to Message 1988009.  

The gadget I spoke off replaces a Wifi device by being powered by a USB port and plugging into an RJ47 port. There is no driver(s) needed because it is smarter than your average "dongle" :)

Guess I still haven't made you understand. So what good is converting a USB port on the Odroid to a RJ-45 jack if there is no matching available RJ-45 jack on the switch to plug it into? Or do you think that a switch has USB ports to convert to a RJ-45 jack? A switch is just a box with RJ-45 jacks. No other ports or connections.


I think you missed the bit where he says it uses Wi-Fi.

It makes the RJ-45 port on the odroid think it is plugged into a switch, but the device uses the USB for power and basically makes a standard LAN port into Wi-Fi

Something like this I suspect

https://www.amazon.co.uk/Generic-Bridge-Convert-RJ45-Ethernet-Wireless/dp/B01HMJ5CFO

OK. Now I understand. I just couldn't get the gist of Tom's answer.
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Message 1988055 - Posted: 30 Mar 2019, 22:21:55 UTC - in response to Message 1988011.  
Last modified: 30 Mar 2019, 22:22:59 UTC


I think you missed the bit where he says it uses Wi-Fi.

It makes the RJ-45 port on the odroid think it is plugged into a switch, but the device uses the USB for power and basically makes a standard LAN port into Wi-Fi

Something like this I suspect

https://www.amazon.co.uk/Generic-Bridge-Convert-RJ45-Ethernet-Wireless/dp/B01HMJ5CFO

OK. Now I understand. I just couldn't get the gist of Tom's answer.


I am sorry I apparently wasn't able to write clearly enough. Its enough to embarrass an aspiring writer :)
I have a switch on order so that I can drive more than one system at a time. Like you, I have boxes in the other end of the house that I am not willing to run a cable, even though I think I have free ports.

I am getting ready to run some week long tests on some more motherboards and I so I am going to see if I can get by without switching it around.

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Message 1988068 - Posted: 30 Mar 2019, 22:47:22 UTC - in response to Message 1988055.  

I ran a new line from the router to the second north bedroom back when I built the last 3 computers. Using a five port switch. I have to unbury all the telescope equipment (500 lbs) out of the hall closet to get access to the crawlspace access. I pulled a line down through the east north bedroom floor and and back up through the west north bedroom floor. About 3-4 hours of work depending on how many times I flub putting the RJ-45 connectors on the bitter ends. Three times as long a pull to get from the living room switch. I still prefer hardline for permanent installations.
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Message 1988100 - Posted: 31 Mar 2019, 6:41:32 UTC

OK, who is going to try out the Nvidia Jetson Nano SoC computer that is going to sell for $99 bucks at the end of April. Ubuntu 18.04 running aarch64 architecture and there is a Seti app for that architecture I see, The kicker is that is has a Maxwell 128 CUDA core co-processor also. Will it run the special app?
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Message 1988133 - Posted: 31 Mar 2019, 13:47:02 UTC - in response to Message 1988100.  

OK, who is going to try out the Nvidia Jetson Nano SoC computer that is going to sell for $99 bucks at the end of April. Ubuntu 18.04 running aarch64 architecture and there is a Seti app for that architecture I see, The kicker is that is has a Maxwell 128 CUDA core co-processor also. Will it run the special app?


A very good question about the Special Sauce App. I had a GT 710 that crashed and burned when it tried the special app.

GPU-Z reports a CUDA# 3.5 even though it has 384 cores (shaders?). But it is "Kepler 2.0" so I think the comparison(s) may not be useful.

I am running a Maxwell with 5.0 CUDA. My gtx 750Ti has run the Linxu/CUDA91 without a problem showing a speed up of 100%. (Going from 15 under Win10/SOG to around 7 minutes).

If the scaling is linear it sounds like the Jetson Soc gpu should "take" about 35 minutes to run a Linux/Cuda9.1 app. Since the cpus take hours, it would be a significant jump in production.

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Message 1988150 - Posted: 31 Mar 2019, 15:35:25 UTC - in response to Message 1988133.  

I can't find the CC value on the Nano in its specs. Just that the gpu side of it is based on Maxwell. Maxwell has a CC rating of 5.0 so should be able to run the app. If it has enough memory..
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Message 1988256 - Posted: 1 Apr 2019, 3:59:32 UTC

Wow, just looked at my Pi's results. Shocking. There are 5 pending validation out of 16 total right now.
https://setiathome.berkeley.edu/results.php?hostid=8173315
Uh, my Pi can't be that much faster that those desktops that have GPU's!
Seti isn't the only project on the Pi and BOINC isn't the only program running on the Pi!
Are there that many boxes that only crunch part time? Are there that many people with caches stuffed to the gills?
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Message 1988263 - Posted: 1 Apr 2019, 4:55:57 UTC

Yup - there can be that many computers that only crunch a matter of hours a day while running the screen saver.
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Message 1988421 - Posted: 2 Apr 2019, 13:22:24 UTC - in response to Message 1988100.  

OK, who is going to try out the Nvidia Jetson Nano SoC computer that is going to sell for $99 bucks at the end of April. Ubuntu 18.04 running aarch64 architecture and there is a Seti app for that architecture I see, The kicker is that is has a Maxwell 128 CUDA core co-processor also. Will it run the special app?


It looks like they are taking orders.
https://www.nvidia.com/en-us/autonomous-machines/embedded-systems/jetson-nano/ Claiming a ship date of 4/19/2019.

That is VERY tempting.

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Message 1989189 - Posted: 7 Apr 2019, 19:33:05 UTC

Well I took a leap of faith and ordered up a Nvidia Jetson Nano Developer Kit when Amazon auto notified me of availability. Won't get it until sometime between May 15 and June 20. Will be interested to see just what it is capable of running. Should be fine with the cpu app I think. Question is what the gpu will be able to run. Took a cursory look at the system image to see what kind of Nvidia drivers it runs. Inconclusive. Will need to actually install it on the hardware to see what is what I think. For $99 I'm game in experimenting.
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Message 1989244 - Posted: 8 Apr 2019, 3:52:52 UTC
Last modified: 8 Apr 2019, 3:53:15 UTC

Phoronix look at the Jetson Nano. It's very low powered compared to the other Jetson systems (but they cost 5 times as much & go up from there), but it can leave a Raspberry Pi way behind in certain applications.
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Message 1989660 - Posted: 11 Apr 2019, 15:14:36 UTC

Greetings,

I have an intermittent noisy fan on my #1 Pi. Need to look into getting a few replacements. :)

Have a great day! :)

Siran
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Message 1989672 - Posted: 11 Apr 2019, 17:10:31 UTC

The small 40mm fans are notorious for being cheap and use sleeve bearings which fail very fast. You can get good quality 40mm fans if you spend some money for a decent one with a ball bearing or advanced bearing design. Noctua makes a very good 40mm fan. I have it and has been running for years. Noctua quality means it is going to cost more than the typical throwaway 40mm fan.
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Message 1989678 - Posted: 11 Apr 2019, 17:45:08 UTC - in response to Message 1989672.  
Last modified: 11 Apr 2019, 18:21:55 UTC

The small 40mm fans are notorious for being cheap and use sleeve bearings which fail very fast. You can get good quality 40mm fans if you spend some money for a decent one with a ball bearing or advanced bearing design. Noctua makes a very good 40mm fan. I have it and has been running for years. Noctua quality means it is going to cost more than the typical throwaway 40mm fan.

Hi Keith,

Yeah, those fans that come with those open cases are the cheapest on the planet. I'll look into Noctua. Never bought them before. Guess there's a first time for everything. ;)

Have a great day! :)

Siran

[edit]
Wow, so many fans! I can only find 40x10mm 5v Noctua fans with a USB power adapter cable for power. I guess, since there are 4 USB ports on each Pi, I could run them that way instead of on the GPIO connector for power. Might as well put them to some use. ;) $15 bucks a pop, not too bad.
[/edit]
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Message 1989687 - Posted: 11 Apr 2019, 20:16:40 UTC

That fan also has the Omnijoin Adapter set which is just some Scotchlocks so you could adapt the existing fan headers that are attached to the GPIO pins to the new Noctua fan and avoid using the USB adapter.
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