Posts by MarkJ

1) Message boards : Number crunching : BOINC won't upload (Message 1958732)
Posted 6 Oct 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Yes I can now get to BOINC and Seti, using the Telstra connection so it looks like they've fixed whatever it was. I was able to get to GPUgrid in Spain so maybe it was their undersea cable to the states.
2) Message boards : Number crunching : BOINC won't upload (Message 1958683)
Posted 5 Oct 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
I am having problems with web browsing and Seti uploads and downloads on Telstra network for the last couple of days. I have a second network using iiNet that is working fine. I’m in Sydney. Both are using ADSL. I even had browsing issues on the mobile phone which is also on Telstra.
3) Message boards : Number crunching : Anyone have any SuperMicro Boards? China hardware hack (Message 1958421)
Posted 4 Oct 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Great I have two as file servers. I wonder how you check for this chip, and if one can do anything about it apart from junking an otherwise perfectly good motherboard.
4) Questions and Answers : Getting started : Delete requests (Message 1955468)
Posted 15 Sep 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
BOINC (website) has an option to delete your account next to the change password link. Einstein has one at the bottom right corner of the Account -> Credentials page. I couldn’t see one for Seti though.
5) Message boards : Number crunching : Debian kernel 4.16.16 breaks Nvidia drivers (Message 1943490)
Posted 9 Jul 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
And they've pushed the 390.67-2 drivers all the way to stretch-backports, so its now safe to upgrade again :-)
6) Message boards : Number crunching : TLBleed another security flaw in modern CPU`s (Message 1942824)
Posted 6 Jul 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
OpenBSD were going to disable HT due to the various security concerns, see Phoronix article
7) Message boards : Number crunching : Debian kernel 4.16.16 breaks Nvidia drivers (Message 1942822)
Posted 6 Jul 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Apparently fixed in 390.67-2. Now waiting for it to get pushed through Debian repos.
8) Message boards : Number crunching : Debian kernel 4.16.16 breaks Nvidia drivers (Message 1942792)
Posted 5 Jul 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Debian only have 375.82 in Stretch and 390.48 in their testing repos. Did you get the later one direct from Nvidia?
9) Message boards : Number crunching : Debian kernel 4.16.16 breaks Nvidia drivers (Message 1942737)
Posted 5 Jul 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
I got a Linux kernel update to 4.16.16 from stretch-backports a couple of days ago and installed it on an i7-8700 without any issues. Went to install it on a Ryzen 7-1700 which also has a GTX1060. It won't boot any more. It hangs in the boot process with a blank screen and you can't ssh into the machine.

There is a Debian bug 901919 raised for it. It also appears to effect multiple NVidia driver versions. Going back to the previous kernel (4.16.04) seems to get it going. If you get offered a Linux kernel update and have nvidia-kernel-dkms you might not want to install it.
10) Message boards : Number crunching : Don't know where it should go? Stick it here! (Message 1940883)
Posted 22 Jun 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
AMD are offering the first 40 winners in the US to swap their Intel i7-8086 with an AMD epyc. See article here
11) Message boards : Number crunching : Power9 anyone? (Message 1940599)
Posted 21 Jun 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Raptor Computing have a Talos II Lite which is somewhat cheaper. Link to the Phoronox artice here.

Its a single CPU EATX machine in a tower case with power supply for $1399 (USD) and then you buy a CPU and memory.

The Power9 chips have 4 or 8 threads per core, so the 22 core CPU gives 88 threads. Expected to ship in July 2018.
12) Message boards : Number crunching : Power9 anyone? (Message 1940049)
Posted 18 Jun 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
IBM have an AC922 compute server using their latest Power9 processors. It can take up to 2 CPUs and they have a couple of different models, up to 22 cores with 4 threads per core. It also supports PCIe gen4 and has a 120MB level 3 cache.

Price tag looks like $5100 (USD) for the system, then $2999 for the base model CPU or $3999 for more cores. Link here

There is also the Talos Raptor II system reviewed by Phoronix. Its only a 16 core/64 thread machine. Link here

They both look quite inpressive as compute servers. You can get an open source Linux for it and then you’d have to compile the Seti apps and threads galore.
13) Message boards : Number crunching : Boinc 7.12.0 problem with headless computer on Linux [Solved] (Message 1937355)
Posted 27 May 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
I have seen issues with boinccmd which go away if you cd to /etc/boinc-client. From memory they seem to have been fixed with a kernel update, even though it shouldn’t have anything to do with it. I think 4.15 or 4.16 work. What kernel and linux flavour are you using?

I assume your gui_rpc_auth.cfg has the same password for both local and remote computers and the machine making the request is listed in remote_hosts.cfg on the remote one.

Can you use BOINCtasks to query the remote host? If the local machine is a Linux one you might need to run it under wine.
14) Message boards : Number crunching : Back into the party! (Message 1934819)
Posted 10 May 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Now Pi-1 - shows all it's tasks, both completed and in-progress, but Pi-2 shows no tasks at all, but it is currently happily working on 3 tasks. Also, Pi-1 shows 3 abandoned tasks in it's listing for May 9 (today). I never abandoned any tasks today for any computer.

Does this make any sense to anyone? I wonder if the Seti software that adds computers has a weird bug?

That sounds like its got the same host id as the other one. Did you copy the SD card from one to make the other? You need to have each one start off with a clean BOINC data directory if possible. When the tasks finish exit boinc-client and nuke the client_state.xml and client_state_prev.xml files then start it up again. It will recreate them and should assign a new host id.

I have seen problems with Seti giving me new hostid's when it should retain the old one (the opposite of what you have). Its supposed to use the mac address to assign a hostid. I have heard of it happening when people use the internet sharing feature in windows.
15) Message boards : Number crunching : Back into the party! (Message 1934401)
Posted 8 May 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Powering the Pis
I use a number of 5 port USB chargers to run them and a couple of official power adapters as well. The USB chargers are technically rated at 3 x 2A plus 2 x 1A output but I have successfully run 4 Pi3's off a single one plus the fans on the top of the case using the 5th port. They're Astrotek AT-UPS-008 or 008B.

Cooling them
One solution that our team founder over at Einstein uses is to stack them and have a couple of 80mm fans on one side of the stack. He has made a few videos about his Bramble as they're called. You can see the video here
16) Message boards : Number crunching : Back into the party! (Message 1934176)
Posted 7 May 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
You can get the temp from the Pi via vcgencmd:
vcgencmd measure_temp

The Pi3's need active cooling as they get quite hot under load. I have a few running Einstein work. I designed a 3D printed case with room for 4 of them side by side and fans on top. Pictures here
17) Message boards : Number crunching : Building on Arm Linux (Message 1930678)
Posted 18 Apr 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Have you read https://setiweb.ssl.berkeley.edu/beta/forum_thread.php?id=2275?

As you will see we had an ARM app done with the help of Claggy and Tom Rinehart so the existing one should simply work out of the box and use neon if the CPU supports it. They may be able to assist you with compiling your own version.
18) Message boards : Number crunching : Debian: Lightdm stopped working after kernel update (Message 1930052)
Posted 15 Apr 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Last night I got an updated kernel from stretch-backports (4.15). I was running the 4.14 from there without any issues. On my boxes with Nvidia drivers they all refused to start up the desktop complaining about lighdm has stopped working. My intel-GPU machines were fine so it seems to be the combination of the Kernel + Nvidia drivers

After reinstalling one box I discovered an easier way assuming you can login to the machine by some other method (ssh).

After it reboots and the desktop gets stuck with the lightdm failure message, login via ssh to it. As root remove the nvidia-kernel-dkms and reinstall it:

apt remove nvidia-kernel-dkms -y
apt install -t stretch-backports nvidia-kernel-dkms linux-headers-amd64 -y
nvidia-xconfig

Reboot and lighdm should now work. You probably don't need to redo the nvidia-xconfig but that's what I normally do after a Nvidia driver update.
19) Message boards : Number crunching : What happened to Hard Drive Quality????? (Message 1925962)
Posted 23 Mar 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Laptop HDDs tend to fail more often due to the laptop moving around. I replaced the mechanical drive in my current laptop with a SSD. Apart from being faster there is no moving parts so less chance of failure as a result. Then it all comes down to the quality of the electronics, pay a bit more for a decent one.

I only have WD hard drives in my rigs. Haven’t had any issues with them in the last 5 years or so. If a cruncher died I would swap out the drive and reinstall it. For a daily driver you need regular backups of it, and you only realise how good your backup plan is (or lack of) when it dies. Heck I even backup my file server which has enterprise grade drives on a raid controller.
20) Message boards : Number crunching : Anyone still using a raspberry pi 3 (Message 1924948)
Posted 16 Mar 2018 by Profile MarkJ Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Post:
Here are the BOINC benchmark results from a 3B and the 3B+

Rpi 3B
Number of CPUs: 4
975 floating point MIPS (Whetstone) per CPU
15364 integer MIPS (Dhrystone) per CPU

Rpi 3B+
Number of CPUs: 4
1123 floating point MIPS (Whetstone) per CPU
17834 integer MIPS (Dhrystone) per CPU

Over on Einstein I am seeing run times of approx 42,000 seconds for the 3B and 37,000 for the 3B+


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SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.