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#76 Re: Raspberry Pi

Posted: Mon Sep 02, 2019 2:11 pm
by davidbam
Not sure about that. With courier services in this area, September would be good :P

#77 Re: Raspberry Pi

Posted: Mon Sep 02, 2019 2:17 pm
by Dirk Broer
I've even ordered at two different stores, to see which courier service/shop combination will be first.
When I was courier myself I once arrived together with two others...

#78 Re: Raspberry Pi

Posted: Wed Sep 04, 2019 11:51 am
by davidbam
Mine arrived - only to find that I don't have a suitable HDMI cable. Sigh.

I thought I did but turns out mine is mini-HDMI to HDMI, the Pi4 uses micro-HDMI which I've never seen before. Ah well - only £2 but another 2 or 3 days

#79 Re: Raspberry Pi

Posted: Wed Sep 04, 2019 1:42 pm
by Dirk Broer
Mine have still to arrive, but I have a suitable cable -from my de-commissioned BeagleBone Black.
This is the difference:
Image

P.S.: What are you using for cooling? The Pi 4 needs a fan+heatsink combo for BOINC. This is by far the most capable-looking Pi cooler:

Image

#80 Re: Raspberry Pi

Posted: Wed Sep 04, 2019 1:51 pm
by davidbam
Glad you posted. I had only just put on my usual passive copper heatsinks which let me Boinc happily on Pi3. I pulled one off before the thermal glue dried :lol: :lol:

I left the other one on as, TBH, I am mainly keen to see how the Pi4 copes with the server-side of btsk. Actual crunching is very much secondary & only if btsk copes well with extreme bunkering (I think the Pi4 will cope well as an old laptop runs it fine).

#81 Re: Raspberry Pi

Posted: Wed Sep 04, 2019 1:53 pm
by davidbam
My pi3 rack is pictured in post #69 - before I put on heatsinks. Actually - I see 3 still need them, I wonder if that explains the performance difference I've been seeing

#82 Re: Raspberry Pi

Posted: Sat Sep 07, 2019 7:02 pm
by Dirk Broer
davidBAM wrote: Sun Jun 30, 2019 4:05 amLooked at the CPU specs on the new Pi4 and didn't see a game-changing leap in performance (at least not on paper)
Benchmarks for the original Raspberry Pi 3 Model B -so not the B+ as used by DavidBAM-, using Raspbian Buster:
1137 floating point MIPS (Whetstone) per CPU
25507 integer MIPS (Dhrystone) per CPU

Benchmarks for the Raspberry Pi 4 Model B, using Raspbian Buster:
2076 floating point MIPS (Whetstone) per CPU
57237 integer MIPS (Dhrystone) per CPU

#83 Re: Raspberry Pi

Posted: Thu Sep 12, 2019 1:43 pm
by Dirk Broer
Main competitors for the Raspberry Pi 4 Model B 4GB seem to be the 2GB and 1GB models of the same Raspberry Pi 4 Model B, by virtue of their lower price.
And as long as you're running a 32-bit OS there might be competition from the ASUS Tinker Board or the Odroid XU4, but they're nearly double the price.

Also at almost double the price are the 64-bit Odroid-N2 and the Rock Pi 4.

The Odroid-N2 has an AmLogic S922X -a quad Cortex-A73 @1800 MHz and a dual Cortex-A53 @1900 MHz in big-LITTLE. It also has a eMMC Module Socket and a capable GPU, the Mali G52 MP6 @846Mhz, supporting OpenGL ES 1.1/2.0/3.x, OpenCL 1.1/1.2/2.0, so superior specs as compared to the Raspberry Pi 4. Oh, and it also runs Android 9.x [When can we have a new NativeBoinc, Scole?]

The Rock Pi 4 -that comes in both an A and a B variant with 1GB/2GB/4GB DDR4 RAM that both have already undergone at least 3 revisions so far- has fittingly a Rockchip SOC: the well-known RK3399, which is a Dual Cortex-A72 @1800 MHz coupled to a quad Cortex-A53 @1400 MHz in big-LITTLE. This gets sometimes advertised as a quad Cortex-A72 by nearsighted/incompetent/ruthless marketeers. The GPU is a Mali T860 MP4 @600MHz, supporting OpenGL ES 1.1/2.0/3.x, Vulkan 1.0, Open CL 1.1/1.2 and DX11. It has not only a eMMC module, but also a M.2 connector supporting up to 2TB M.2 NVMe SSD. So, while CPU and GPU do not impress -especially not when compared to the Odroid-N2- the other features are quite good.

Note that it is possible to run the GPU app for MilkyWay@Home, using the ARM Mali T-628, on an Odroid XU4 board, and MilkyWay@Home is not known for having the easiest hardware requirements. The Mali T-628 is -per core- not stronger than e.g. the Videocore IV of the Raspberry Pi...
If you want real ARM GPU power, then use the Adreno 680 of a Snapdragon 8cx.

#84 Re: Raspberry Pi

Posted: Mon Oct 07, 2019 11:21 pm
by Dirk Broer
Funny, running a Pi4 with 32-bit Raspbian gives:
cat /proc/cpuinfo
processor : 0
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 270.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3

running a Pi4 with a 64-bit kernel gives:
cat /proc/cpuinfo
processor : 0
BogoMIPS : 108.00
Features : fp asimd evtstrm crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3


On the net I found a similair output for an Odroid-C2, running Android:
Hardware : ODROID-C2
processor : 0
model name : AArch64 Processor rev 4 (aarch64)
Features : fp asimd evtstrm crc32 wp half thumb fastmult vfp edsp neon vfpv3 tlsi vfpv4 idiva idivt
CPU implementer : 0x41
CPU architecture : 8
CPU variant : 0x0
CPU part : 0xd03
CPU revision : 4

Android is a 32bit user land and the /proc/cpuinfo information is "emulated" for backward compatibility.
Only "fp", "asimd", "evtstrm", "aes", "pmull", "sha1", "sha2" and "crc32" are valid AArch64 feature flags.
The rest are implied. Running a 32bit program will show the same feature flags as Android on Linux.

An ASUS Tinker Board running Tinker OS 2.03 (Armbian seems to be much better):
cat /proc/cpuinfo
processor : 0
model name : ARMv7 Processor rev 1 (v7l)
BogoMIPS : 10.08
Features : half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xc0d
CPU revision : 1

to be continued

BTW: both Pi4's fly through the WEP M2 WUs like hot knives through butter...

#85 Re: Raspberry Pi

Posted: Fri Jun 05, 2020 2:25 am
by Dirk Broer
Let's say you bought yourself the latest Raspberry Pi, the Raspberry Pi 4B with 8GB of RAM, what can you do with it? And what couldn't be done with earlier Pi's?

Let me first stress that the 8GB, together with the ARM Cortex-A72 allows for a 64-bit OS -e.g. Raspberry Pi OS to be used to the fullest extent.
From the Raspberry Pi 3B on (and even the 2nd edition of the Raspberry Pi 2B) the board had a 64-bit ARM Cortex-A53, but with only 1 GB of RAM. The Pi 4B was originally introduced with 1, 2 and 4 GB, the latter just having enough RAM to be able to run a 64-bit OS (and more than enough to run a 32-bit OS). The 1 GB model has been withdrawn since a few months and a 8 GB model has now been added to the line. That is as much RAM as is there in the PC of my missus, and twice the RAM as in the PC of my daughter! (she uses a hand-me-down Socket 775 Dell that won't accept more than 4GB and is due for a Ryzen 5 upgrade)

What projects have apps for ARM/Linux? And do they cater 64-bit?
*Does anyone have an overview for WCG? MIP and OPN can be done 32-bit natively and 64-bit with a hack at least*
Raspberry Pi apps
ProjectApplication32-bit64-bit
Albert@HomeBinary Radio Pulsar SearchYes
Amicable NumbersAmicable Numbers up to 10^21Yes
AsteroidsPeriod Search ApplicationYes
Einstein@HomeBinary Radio Pulsar SearchYes
GoofyxGrid@Home NCIMonkeys v1Yes
Monkeys v2Yes
Monkeys v3Yes
Monkeys v4Yes
iThenaiThena CNodeYesYes
LHC@HomeSixTrackYes
sixtracktestYes
RakeSearchRakeSearch for rank 10Yes
Ralph@HomeRosettaYes
Rosetta@HomeRosettaYes
Seti@HomeSeti@Home v8YesYes
Seti@Home BetaSeti@Home v8YesYes
T.Brada Experimental GridPADLS TotalYes
Symmetric Prime TuplesYes
TN-Grid Platformgene@home PC-IMYesYes
UniverseUniverse ULXYes
Universe BHspin v2Yes
Neutron Star and Black Hole formationYesYes
WEP-M+2Random-base WEP FactorizationYes
WUProp@HomeData collect version 4Yes
YoyoCruncher ogrYes
ecmYesYes
ecm P2YesYes
SieverYes
M QueensYes
If you have installed a 64-bit OS and want/need to run 32-bit apps, you might need to install 32-bit libraries to do so.
In case of wanting to run 32-bit apps under a 64-bit OS you get a message like "This project doesn't support computers of type aarch64-unknown-linux-gnu" from that project.
You then need to add:

Code: Select all

<options>
  <alt_platform>arm-unknown-linux-gnueabihf</alt_platform>
</options>
to the cc_config.xml file

#86 Re: Raspberry Pi

Posted: Sat Jun 06, 2020 12:39 pm
by Megacruncher
Would a few Pi s be a useful way to add some cores to the farm without splashing out on yet another Threadripper? Any information on how the per core performance compares with say a 2990WX?
And where is the best place to buy these beasties?

#87 Re: Raspberry Pi

Posted: Sat Jun 06, 2020 12:50 pm
by davidbam
I use the Pi Hut - either on eBay or their own site

Would help if a few more projects supported them

#88 Re: Raspberry Pi

Posted: Sun Jun 07, 2020 9:53 am
by Dirk Broer
davidBAM wrote: Sat Jun 06, 2020 12:50 pmWould help if a few more projects supported them
I think that all projects that have Android apps as their sole non-x86 architecture app could easily port it to Linux/ARM, be it either 32- or 64-bit.
If their apps are opensource, even the community could do that.

#89 Re: Raspberry Pi

Posted: Sat Jun 13, 2020 12:56 pm
by Megacruncher
Okay so I've got my 8GB RPi 4B up and running.
It's lovely and cool (50degC) with it's splendid ICE-Tower cooler.
It's currently running Universe and early indications are that it might produce 20-25K Credits/pd.
I also got it running with a static IP.

I'm ordering another 3.

In the meanwhile I'd appreciate some advice:
Firstly -how to get it connected to btsk?
Secondly - can I use the Linux scripts previously uploaded by scole to set up multiple instances on the Pi (running Raspbian)? There's not much point in having loads of instances but 2 or 3 would be useful.

#90 Re: Raspberry Pi

Posted: Sat Jun 13, 2020 1:04 pm
by davidbam
yes - I use multi-instance on rpi

for btsk - run WUprop in every instance, usual password in gui_rpc_auth.cfg & btsk server IP in remote_hosts.cfg

Then add 3 lines at the end of /etc/hosts on btsk server. For EXAMPLE

Code: Select all

92.168.0.160	rpi1        #boinc= cpu=4   groups=rpi
92.168.0.161	rpi2        #boinc= cpu=4   groups=rpi
92.168.0.162	rpi3        #boinc= cpu=4   groups=rpi
That will find all instances on each

#91 Re: Raspberry Pi

Posted: Sat Jun 13, 2020 1:08 pm
by Megacruncher
TYVM!

#92 Re: Raspberry Pi

Posted: Sat Jun 13, 2020 1:20 pm
by davidbam
They won't be found instantly BTW - either wait a while or use yellow menu > hover > machine config > re-sync hosts

#93 Re: Raspberry Pi

Posted: Tue Jun 16, 2020 11:42 pm
by Megacruncher
the multiple instance thing worked. Then didn't. Now after a uninstall/reinstall of Boinc on the Pi, I've got it recognised on btsk which is cool, even if it's only as a single instance. Which on balance is still cool!
The other 3 are enroute!

#94 Re: Raspberry Pi

Posted: Wed Jun 17, 2020 11:06 am
by davidbam
Megacruncher wrote: Tue Jun 16, 2020 11:42 pm the multiple instance thing worked. Then didn't. Now after a uninstall/reinstall of Boinc on the Pi, I've got it recognised on btsk which is cool, even if it's only as a single instance. Which on balance is still cool!
The other 3 are enroute!
You can use the the same /etc/rc.local file to auto-start any additional instances. Sounds like a reboot may have killed them off

#95 Re: Raspberry Pi

Posted: Wed Jun 17, 2020 1:18 pm
by Megacruncher
You can use the the same /etc/rc.local file to auto-start any additional instances.
Can you remind me how this works? Explain like I'm five y.o. sort of thing, please.
Thanks.

#96 Re: Raspberry Pi

Posted: Wed Jun 17, 2020 1:40 pm
by davidbam
Okay - we'll do it after you go to the toilet for Daddy

#97 Re: Raspberry Pi

Posted: Wed Jun 17, 2020 1:55 pm
by davidbam
Did you wash your hands?

Put this into a file called /etc/rc.local on the Rasp Pi. Save it. chmod +x /etc/rc.local and reboot. It will start an additional instance for every boinc directory it finds commencing at port 31501

Code: Select all

#!/bin/sh -e
# rc.local
# This script is executed at the end of each multiuser runlevel. Make sure that the script
# will "exit 0" on success or any othervalue on error.
#
# In order to enable or disable this script just change the execution bits.

# start all extra boinc instances.  By David Foubister, TSBT
ls -d /var/lib/boinc[0-9]* | while read dir
do
  j=`echo $dir | tr -d a-z/`
  i=`expr 31500 + $j`
  /usr/bin/boinc4k --allow_multiple_clients --gui_rpc_port $i --dir $dir &
done
exit 0

#98 Re: Raspberry Pi

Posted: Wed Jun 17, 2020 3:18 pm
by Megacruncher
Splendid. I'll try that as soon as I get the chance.
Will it work on windows or do I need something equivant but different?

#99 Re: Raspberry Pi

Posted: Wed Jun 17, 2020 3:25 pm
by davidbam
I think you already use that on your other Linux crunchers TBH. I can see no value in additional instances if they don't auto-start :)

Talk to your Grandfather about auto-start on Windows as I haven't a clue ;)

#100 Re: Raspberry Pi

Posted: Fri Jun 19, 2020 10:16 pm
by scole of TSBT
Have you chaps seem the new Raspberry Pi Turing board coming out? Will support 7x Pi 3+ compute modules. The Pi4 compute modules rumored to come out later this year.

https://turingpi.com/

#101 Re: Raspberry Pi

Posted: Tue Jun 23, 2020 2:01 pm
by Dirk Broer
Some news about the future Compute 4 modules https://iot-industrial-devices.com/upco ... ease-date/

#102 Re: Raspberry Pi

Posted: Thu Jul 02, 2020 12:44 am
by Dirk Broer
Dirk Broer wrote: Sat Sep 07, 2019 7:02 pm
davidBAM wrote: Sun Jun 30, 2019 4:05 amLooked at the CPU specs on the new Pi4 and didn't see a game-changing leap in performance (at least not on paper)
Benchmarks for the original Raspberry Pi 3 Model B -so not the B+ as used by DavidBAM-, using Raspbian Buster:
1137 floating point MIPS (Whetstone) per CPU
25507 integer MIPS (Dhrystone) per CPU

Benchmarks for the Raspberry Pi 4 Model B, using Raspbian Buster:
2076 floating point MIPS (Whetstone) per CPU
57237 integer MIPS (Dhrystone) per CPU
Benchmarks for the Raspberry Pi 4 Model B@1500MHz, using Raspberry Pi OS 64-bit:
2081 floating point MIPS (Whetstone) per CPU
60385 integer MIPS (Dhrystone) per CPU

As I bought myself a 52Pi Ice Tower Cooler for the Pi 4, I decided a modest overclock.
Benchmarks for the Raspberry Pi 4 Model B@1800MHz, using Raspberry Pi OS 64-bit:
2511 floating point MIPS (Whetstone) per CPU
72845 integer MIPS (Dhrystone) per CPU
The 52Pi Ice Tower Cooler keeps it at 52°C / 125.6°F

I upgraded the firmware, as it promised lower temperatures and overclocked the Pi 4 to 2000 MHz
2771 floating point MIPS (Whetstone) per CPU
79748 integer MIPS (Dhrystone) per CPU
The 52Pi Ice Tower Cooler keeps it at 47 to 48°C / 116.6 to 118.4°F....

#103 Re: Raspberry Pi

Posted: Sun Aug 02, 2020 12:05 am
by Dirk Broer
It is almost a year later now and the field has changed yet again. Contenders have come and gone.

Biggest game-changer was the bringing out at the almost same time of a 64-bit Raspberry Pi OS and a new 8 GB model of the Pi. On top of that there came more heavy-duty cooling solutions, like shown here

Contender Hardkernel first brought out a 4 GB Odroid-C4, basically a Cortex-A55 equipped improvement of their Cortex-A53 C2 with more (DDR4) RAM, but at the very speed that originally was intended for the C2: 2000 MHz.
The C4, like the C2 and the C1 can be used in open casings that fit the Raspberry, like this Image
Secondly, Hardkernel brought out an improved version of its Odroid-N2, the Odroid-N2+ where the maximum CPU clock of the Quad-core Cortex-A73 is increased to 2400 Mhz (from 1800 Mhz) and the maximum CPU clock of the Dual-core Cortex-A53 is increased to 2000 Mhz (from 1900 Mhz). The on-board RTC backup battery pin-out is now replaced by a battery holder mounted on the board. The heatsink is not as high as the original and has provision to mount a fan underneath -as had the old N2, but the N2+ needs the fan to maintain the higher speeds. The fan's stand-off screws bring the N2+ up to normal height. We now await a 8 GB model of the N2+.....

Where's the rest of the field? Banana Pi's M4 model already fell short last year and they really should bring out their Banana Pi M5 pretty soon now.
Most of the other contenders seem to have put their money on the Rockchip RK3399, which is sometimes -misleadingly- advertised as an "overclocked Cortex-A72" six-core. It *IS* a six-core chip, but in LITTLE.big format, LITTLE being here four Cortex-A53 cores, and big two Cortex-A72s cores.
You can get RK3399 boards from Rock Pi -the Rock Pi 4 (in three main versions)-, Orange Pi -the Orange Pi 4B being the most interesting model-, Nano Pi - the NanoPi M4B- and loads of other, less known companies.

There is a RK3399Pro as well, with embedded neural processing unit (NPU) delivering up to 3 TOPS for AI acceleration. RockPi has one, the RockPi N10. It is rumoured to outperform the quad-core Cortex-A57 nVidia Jetson Nano in some AI-tasks....though the software you can download at nVidia for the Jetson Nano (the JetPack and Deepstream SDKs) might suit a project like MLC much better. MLC needs to bring out an ARM app though to make use of it.

#104 Re: Raspberry Pi

Posted: Sat Oct 03, 2020 12:09 am
by scole of TSBT
I'm trying this Pi 4 heatsink. It covers the CPU, memory chip and USB chip. Running 4x WCG OP and WUProp. Temp hasn't gone above 47C so far.

https://www.amazon.com/dp/B07VWM4J4L

#105 Re: Raspberry Pi

Posted: Sat Oct 03, 2020 5:40 am
by davidbam
Got any overclocking on that? Should be good for 2ghz or more

#106 Re: Raspberry Pi

Posted: Wed Oct 21, 2020 1:36 am
by Dirk Broer
scole of TSBT wrote: Fri Jun 19, 2020 10:16 pm Have you chaps seem the new Raspberry Pi Turing board coming out? Will support 7x Pi 3+ compute modules. The Pi4 compute modules rumored to come out later this year.

https://turingpi.com/
The compute module 4's are out (32 different ones: WiFi/BT vs none; 1, 2, 4 or 8GB of RAM; no eMMC, 8GB eMMC, 16 GB eMMC or 32 GB eMMC+ 2 x 4 x 4 = 32), and: shock!
...gone is the SODIMM format. What does that do for our beloved Turing Pi? Enter the Turing Pi 2.

In its most minimal format a quad-core Cortex-A72 without wifi/bluetooth and 1 GB of RAM, without eMMC,
In its most maximal format a hexadeca-core Cortex-A72 with wifi/bluetooth on all four modules and 32 GB RAM, with 128 GB of eMMC storage space (32 GB for each module).

#107 Re: Raspberry Pi

Posted: Wed Oct 21, 2020 1:53 am
by scole of TSBT
Do the RPIs mount in the 4 260 pin DIMM slots?

#108 Re: Raspberry Pi

Posted: Wed Oct 21, 2020 12:42 pm
by Dirk Broer
scole of TSBT wrote: Wed Oct 21, 2020 1:53 am Do the RPIs mount in the 4 260 pin DIMM slots?
Like this: heatsink, compute module, 260 pin DIMM connector. Briljant!
Image

Now, would seven of those 260 pin DIMM connectors fit in the original Turing Pi? No, that had a 200 pin connector interface. Bummer....

#109 Re: Raspberry Pi

Posted: Fri Nov 13, 2020 10:59 pm
by Dirk Broer
Raspberry cooling-wise there has been a nice article on en.itcooky.com, where the two 52Pi solutions outperform the rest by a considerable margin.
#2 in the contest was Image
but this is the winner:Image
Results were close though especially at stock speed (1500 MHz), but at 2000 MHz the 'low ice tower' -let's call it 'ice-shield'- is definitely more effective.

#110 Re: Raspberry Pi

Posted: Tue Dec 01, 2020 5:30 pm
by davidbam
@Dirk Broer or anyone else

What do I need to do for maximum compatibility of Boinc projects on 64bit raspios please? I want to be able to run the new Rosetta WU but also any of the other projects

#111 Re: Raspberry Pi

Posted: Thu Dec 03, 2020 3:51 pm
by Dirk Broer
davidBAM wrote: Tue Dec 01, 2020 5:30 pm @Dirk Broer or anyone else

What do I need to do for maximum compatibility of Boinc projects on 64bit raspios please? I want to be able to run the new Rosetta WU but also any of the other projects
In case you are running a 64-bit OS on a Raspberry Pi 3 or 4 (preferably the latter and 4GB or 8GB in that case), following commands will install the 32-bit libs needed to run most BOINC apps:

Code: Select all

sudo dpkg --add-architecture armhf
sudo apt update
sudo apt install libc6:armhf libstdc++6:armhf
Additionally you have to add two alternate platform identifiers to your cc_config.xml file:

Code: Select all

<cc_config>
    <options>
        <alt_platform>arm-unknown-linux-gnueabihf</alt_platform>
        <alt_platform>armv7l-unknown-linux-gnueabihf</alt_platform>
    </options>
</cc_config>
If you run a 64-bit OS on a Raspberry Pi 3, or a 4 with 1 or 2 GB of RAM (perhaps even with 4GB), be sure to install ZRAM as well

#112 Re: Raspberry Pi

Posted: Thu Dec 03, 2020 3:55 pm
by davidbam
many thanks @Dirk Broer

#113 Re: Raspberry Pi

Posted: Thu Dec 03, 2020 4:00 pm
by Dirk Broer
And mind you, the same about 32-bit libc, libstdc++6 and ZRAM holds true for Odroids -or any other 64-bit ARM crunching platform, e.g. when you have plans around the new 2GB nVidia Jetson Nano, or even the original 4GB model.

#114 Re: Raspberry Pi

Posted: Fri Jan 01, 2021 1:47 am
by Dirk Broer
Dirk Broer wrote: Wed Oct 21, 2020 12:42 pm
scole of TSBT wrote: Wed Oct 21, 2020 1:53 am Do the RPIs mount in the 4 260 pin DIMM slots?
Like this: heatsink, compute module, 260 pin DIMM connector. Briljant!
Image

Now, would seven of those 260 pin DIMM connectors fit in the original Turing Pi? No, that had a 200 pin connector interface. Bummer....
Not so bummer after all: Gumstix Introduces CM4 to CM3 Adapter, Carrier Boards for Raspberry Pi Compute Module 4 They even let you choose between a Pi CM4 Uprev & UprevAI CM3 adapter board.
ImageThe AI version also has a Google Coral accelerator module

Note however this remark by Jeff Geerling in his review of the Turing Pi 1 "The CPU is ... constrained by the fact that the Compute Module is clocked at a maximum of 1.2 GHz. And that's not a limitation of the Turing Pi, it's because the DIMM connection can't provide enough power using the Compute Module's current design to support faster clock speeds."
This might let you decide to go for the Turing Pi 2 when using the compute module 4 (CM4). If you already have a running Turing Pi 1 it is a nice experiment though...

#115 Rosetta Stone

Posted: Mon Jan 04, 2021 6:59 pm
by davidbam
Introducing my new machine : Rosetta Stone, because the plan is to add to it until it weighs 14lbs & run Rosetta :P

20 pi4 8Gb machines. One serves as a network boot server / NFS server for all the others so no fiddly SD cards or USB sticks.

Server has one 128Gb SSD on USB3. No boinc on that guy
Clients have no media whatsoever.
three 8-port hubs
trays are free from local mushroom wholesaler

End result is 80 cores (76 set-and-forget on Rosetta), 160Gb RAM. Total power draw is only 145W

Image

Image

#116 Re: Raspberry Pi

Posted: Mon Jan 04, 2021 7:29 pm
by Miklos M
I do not understand some of it, lol, but it sounds like a one hack of a computing power.

#117 Re: Raspberry Pi

Posted: Mon Jan 04, 2021 7:46 pm
by davidbam
It is a fair bit of RAM which will suit Rosetta 64bit and the big WCG project (Open Pandemics?). Overclocked to 2GHz - not monsters but would maybe give an old Xeon a good race.

Definitely good in WCG time challenges

#118 Re: Raspberry Pi

Posted: Tue Jan 05, 2021 1:26 am
by Dirk Broer
This would take five Turing Pi 2's and but one 8-port switch, as a 5-port switch would be one port short.
It would take three Turing Pi 1's (with 21 CM4 to CM3 adapters, or just plain 21 CM3's) - but a 4-port switch would already be enough.

And that is all without consideration for the network boot server / NFS server module. You'll need another Turing Pi 2 to get a decent amount of cores dedicated to crunching:
6x (4-1) = 18
The Turing Pi 1 would do: 3x (7-1) = 18 too, but the CM3 is limited to 1200MHz -and I don't know if the same applies for the CM4 to CM3 adapter.

Cooling-wise you'll have to look out for a bitcoin miner that wants to get rid of a 6x 120mm bitcoin rack casing because the increased power consumption of the newest video cards needs him/her to look out for bigger cases and dito fans/radiators.

#119 Re: Rosetta Stone

Posted: Tue Jan 05, 2021 6:43 am
by Saetia
davidBAM wrote: Mon Jan 04, 2021 6:59 pm trays are free from local mushroom wholesaler
Mushroom pi :-)

#120 Re: Raspberry Pi

Posted: Tue Jan 05, 2021 7:02 am
by davidbam
:rofl:

#121 Re: Raspberry Pi

Posted: Tue Jan 05, 2021 12:40 pm
by Saetia
@davidBAM How long does a Pi4 take to crunch each Rosetta WU?

#122 Re: Raspberry Pi

Posted: Tue Jan 05, 2021 12:48 pm
by davidbam
Rosetta works differently from other projects. You set the run-time yourself in project preferences and you get paid based on how much work it gets through.

So far, it has to be said, I am a bit underwhelmed by the points earned. The jury is still out but I might try Africa Rainfall on WCG to see how that goes

#123 Re: Raspberry Pi

Posted: Tue Jan 05, 2021 6:04 pm
by Dirk Broer
davidBAM wrote: Tue Jan 05, 2021 12:48 pm Rosetta works differently from other projects. You set the run-time yourself in project preferences and you get paid based on how much work it gets through.

So far, it has to be said, I am a bit underwhelmed by the points earned. The jury is still out but I might try Africa Rainfall on WCG to see how that goes
It won't, OpenPandemics is all that lands on my ARM fleet -only my Android-running Odroid-N2+ also gets MCM, but no Africa Rainfall either.

#124 Re: Raspberry Pi

Posted: Tue Jan 05, 2021 6:35 pm
by Saetia
davidBAM wrote: Tue Jan 05, 2021 12:48 pm Rosetta works differently from other projects. You set the run-time yourself in project preferences and you get paid based on how much work it gets through.
Huh. I didn't realize that was the case! I've been using the default setting of 8 hours uptime and just assumed my CPU was 'slow' at doing them.

#125 Re: Raspberry Pi

Posted: Tue Jan 05, 2021 8:54 pm
by davidbam
I think I've sussed it. Rosetta WU read from a huge input file so are putting a heavy burden on file system reads. A pi4 booted from SD card or USB3 stick will die - my 76 WU using a network file system puts a huge load on the NFS server and also saturates the network.

This could even be why some of my main crunchers struggle under a full load of Rosetta

Run from an SSD and limit WU count, I think