1) Message boards : CMS Application : New Version 70.00 (Message 47462)
Posted 1 Nov 2022 by Jim1348
Post:
OK, I have been wanting to do it. I am in again.
2) Message boards : CMS Application : New Version 70.00 (Message 47459)
Posted 1 Nov 2022 by Jim1348
Post:
CMS never runs test units, not even on the dev server.

OK, I had gotten the opposite impression.
https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=5855&postid=47122#47122
3) Message boards : CMS Application : New Version 70.00 (Message 47454)
Posted 1 Nov 2022 by Jim1348
Post:
I am wondering if this means that CMS is "operational", or still doing test units.
I will try it if they are doing actual work units.
4) Message boards : ATLAS application : Is ATLAS limited to to 4 WUs per computer? (Message 47406)
Posted 21 Oct 2022 by Jim1348
Post:
Like I said, one CPU per WU. Or as Preferences phrases it, "Max # of CPUs for this project" = 1.

That is your mistake. (The work server has no reasonable idea of anything you set, to answer your other question).

You set both Max # jobs and Max # CPUs to "No limit"

Then, you use the following app_config to run only one core per work unit (or any number you want):
<app_config>
<app>
  <name>ATLAS</name>
</app>
<app_version>
    <app_name>ATLAS</app_name>
    <plan_class>native_mt</plan_class>
    <avg_ncpus>1.0</avg_ncpus>
    <cmdline>--nthreads 1</cmdline> 
</app_version>
</app_config>


However, this trick works only for native ATLAS. I forget what you do for VirtualBox, but I think you just try at random until you find something more or less acceptable.
5) Message boards : Number crunching : VirtualBox ~^~~-- 6.1.38 --~~^~ (released September 02 2022) (Message 47321)
Posted 28 Sep 2022 by Jim1348
Post:
Now I get an error in BOINC:

"LHC@home: Notice from BOINC
Your app_config.xml file refers to an unknown application 'Theory'. Known applications: None"

That is not an error. It just means that you have not run one yet.
It will go away when you do.

But I don't see any obvious problems. Maybe the Windows experts around here can suggest something. Good luck.
6) Message boards : Number crunching : VirtualBox ~^~~-- 6.1.38 --~~^~ (released September 02 2022) (Message 47317)
Posted 27 Sep 2022 by Jim1348
Post:
Any comments you have on this would be welcomed.

Are you on Windows? (Your computer is hidden).
I don't know much about that.

But you don't really need it on Theory, except for the max_concurrent if you want it. Theory runs only one CPU core per work unit anyway.
7) Message boards : Number crunching : VirtualBox ~^~~-- 6.1.38 --~~^~ (released September 02 2022) (Message 47315)
Posted 27 Sep 2022 by Jim1348
Post:
I am not sure that this is particularly relevant, but I just set up my Ryzen 3900X again after a clean install of Ubuntu 20.04.5 (BOINC 7.16.6).
I ran only native ATLAS at first, but noticed that I was downloading only a few (maybe 12?) work units at a time even though I set it to "Max # jobs No limit" and "Max # CPUs 1".
That is not particularly surprising, and has happened many times before. So I added native Theory and even Sixtrack to the mix, but it did not help to get more native ATLAS.

Finally, I used the old trick that always works for me. I set "Max # CPUs No Limit". That allows me to download more native ATLAS, but then they all run on multiple cores (I think maybe 16?).
To fix that, I used an app_config.xml as follows:

<app_config>
 <app>
  <name>ATLAS</name>
</app>
<app_version>
    <app_name>ATLAS</app_name>
    <plan_class>native_mt</plan_class>
    <avg_ncpus>1.0</avg_ncpus>
    <cmdline>--nthreads 1</cmdline> 
</app_version>
</app_config>

Problem solved, and I am now running as many as 20 native ATLAS at a time, as set by BOINC Manager.
This does not apply to VirtualBox unfortunately, so I don't know how useful it is.
8) Message boards : LHC@home Science : Ready to restart! (Message 47173)
Posted 25 Aug 2022 by Jim1348
Post:
A bit OT, but I have been wondering whether all the energy problems in Europe will affect LHC.
They should have access to nuclear power from France and hydro from Switzerland, but if things get tough, even they may be hard to come by.

It is not something that you usually have to worry about, but these are not exactly usual times.
9) Message boards : CMS Application : Is there a Native version in the pipeline? (Message 47169)
Posted 24 Aug 2022 by Jim1348
Post:
Thanks for the update. But it seems to me that we should have been warned about their lack of enthusiasm, and the type of work we were doing.
10) Message boards : LHC@home Science : Physicists surprised to discover the proton contains a charm quark (Message 47163)
Posted 19 Aug 2022 by Jim1348
Post:
The proton, a particle found at the heart of every atom, appears to have a more complicated structure than is traditionally given in textbooks. The find could have ramifications for sensitive particle physics experiments like the Large Hadron Collider (LHC).
https://www.newscientist.com/article/2334076-physicists-surprised-to-discover-the-proton-contains-a-charm-quark/

You will need a free account to read this.
11) Message boards : ATLAS application : Problem setting up cvmfs (Message 47139)
Posted 10 Aug 2022 by Jim1348
Post:
Has anyone else had this issue with the latest release of Mint / Ubuntu?

I used Apptainer on a new Ubuntu 20.04.4 installation a month ago with no problem.
https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=5817#46537
12) Message boards : ATLAS application : ATLAS vbox v2.02 (Message 47132)
Posted 10 Aug 2022 by Jim1348
Post:
I thought I should mention that not only is Hyper V incompatible with VirtualBox, but apparently so is WSL2.

I have WSL2 installed on my Win10 machine, and am running BOINC 7.16.6 just fine under Ubuntu 20.04.4.
Also, I have VirtualBox 6.1.36 installed on the Windows side, and also BOINC 7.20.2, where VB shows up properly in the log file.
But LHC does not see it (neither does Rosetta for that matter).
"Virtualbox (6.1.36) installed, CPU does not have hardware virtualization support"

I was able to run VBox just fine before enabling WSL2.
So you choose one or the other.
13) Message boards : LHC@home Science : How the revamped Large Hadron Collider will hunt for new physics (Message 46829)
Posted 29 May 2022 by Jim1348
Post:
The hunt for new physics is back on. The world’s most powerful machine for smashing high-energy particles together, the Large Hadron Collider (LHC), has fired up after a shutdown of more than three years. Beams of protons are once again whizzing around its 27-kilometre loop at CERN, Europe’s particle-physics laboratory near Geneva. By July, physicists will be able to switch on their experiments and watch bunches of particles collide.

In its first two stints, in 2009–13 and 2015–18, the LHC explored the known physics world. All of that work — including the triumphant 2012 discovery of the Higgs boson — reaffirmed physicists’ current best description of the particles and forces that make up the Universe: the standard model. But scientists sifting through the detritus of quadrillions of high-energy collisions have yet to find proof of any surprising new particles or anything else completely unknown.

This time could be different. The LHC has so far cost US$9.2 billion to build, including the latest upgrades: version three comes with more data, better detectors and innovative ways to search for new physics. What’s more, scientists start with a tantalizing shopping list of anomalous results — many more than at the start of the last run — that hint at where to look for particles outside the standard model.

“We’re really starting with adrenaline up,” says Isabel Pedraza, a particle physicist at the Meritorious Autonomous University of Puebla (BUAP) in Mexico. “I’m sure we will see something in run 3.”

https://www.nature.com/articles/d41586-022-01388-6
14) Message boards : LHC@home Science : A Theory of Reality as More Than the Sum of Its Parts (Message 46679)
Posted 25 Apr 2022 by Jim1348
Post:
The true causes, to a physicist, are the fundamental forces acting between particles; all effects ripple out from there. Indeed, these forces, when they can be isolated, appear perfectly deterministic and reliable — physicists can predict with high precision the outcomes of particle collisions at the Large Hadron Collider, for instance. In this view, causes and effects become hard to predict from first principles only when there are too many variables to track.

Furthermore, philosophers have argued that causal power existing at two scales at once would be twice what the world needs; to avoid double-counting, the “exclusion argument” says all causal power must originate at the micro level. But it’s almost always easier to discuss causes and effects in terms of macroscopic entities. When we look for the cause of a fatal car crash, or Romeo’s decision to start climbing, “it doesn’t seem right to go all the way down to microscopic scales of neurons firing,” DeDeo said. “That’s where Erik [Hoel] is jumping in. It’s a bit of a bold thing to do to talk about the mathematics of causation.”
https://getpocket.com/explore/item/a-theory-of-reality-as-more-than-the-sum-of-its-parts

I hope they learn something useful from banging all these particles together.
15) Message boards : LHC@home Science : About the science (Message 46670)
Posted 23 Apr 2022 by Jim1348
Post:
Here are two new projects from the link that maeax posted, though they are not on LHC@home:

Other things to look forward to in Run 3 include the operation of two new experiments, FASER and SND@LHC, designed to look for physics beyond the Standard Model; special proton–helium collisions to measure how often the antimatter counterparts of protons are produced in these collisions; and collisions involving oxygen ions that will improve physicists’ knowledge of cosmic-ray physics and the quark–gluon plasma, a state of matter that existed shortly after the Big Bang.

https://home.cern/news/news/accelerators/large-hadron-collider-restarts
16) Message boards : LHC@home Science : Large hadron collider: A revamp that could revolutionise physics (Message 46664)
Posted 22 Apr 2022 by Jim1348
Post:
https://www.bbc.com/news/science-environment-61149387
17) Message boards : ATLAS application : many download errors: "-186 (0xFFFFFF46) ERR_RESULT_DOWNLOAD" (Message 46660)
Posted 21 Apr 2022 by Jim1348
Post:
I can't say that I monitor the downloads very often, but I am running 22 cores of a Ryzen 3900X on native ATLAS and CMS, and have not noticed any problems yet.
I never see any stuck in transfers when I look.
https://lhcathome.cern.ch/lhcathome/results.php?hostid=10750296&offset=0&show_names=0&state=4&appid=

I do have a good cable modem with 110 Mbps download though.
18) Message boards : LHC@home Science : Shock result in particle experiment could spark physics revolution (Message 46597)
Posted 7 Apr 2022 by Jim1348
Post:
Scientists just outside Chicago have found that the mass of a sub-atomic particle is not what it should be. The measurement is the first conclusive experimental result that is at odds one of the most important and successful theories of modern physics.

The team has found that the particle, known as a W boson, is more massive than the theories predicted.

https://www.bbc.com/news/science-environment-60993523
19) Questions and Answers : Unix/Linux : [Solved] Virtualbox and NS_ERROR_SOCKET_FAIL (Message 46541)
Posted 27 Mar 2022 by Jim1348
Post:
So I modified the file /usr/lib/systemd/system/boinc-client.service and uncommented this line in the [Service] section:

PrivateTmp=true

Thanks, but it was already uncommented on my system (Ubuntu 20.04.4 and BOINC 7.16.6, with VirtualBox 6.1.32).

Do you mean that it should be commented out?
# PrivateTmp=true
20) Message boards : ATLAS application : Guide to Getting Quickly Started Running Native ATLAS (Ubuntu 20.04 on WSL2) (Message 46535)
Posted 26 Mar 2022 by Jim1348
Post:
I played around with WSL2 BOINC configurations, to be able to control it from Windows BOINC Manager and it doesn't seem to work cleanly. Configurations seem to be crisis-crossing somehow, WSL2 BOINC data directory seems to be getting changed or duplicated (still not sure which happens). Proxy settings on one affect the other. I'm still not all clear on what's going on but it doesn't seem to function like I expected, where you can manage both independently without one affecting the other. Unlike you, I don't have anything else connected, so I can see how your set up can get even more complicated. Do you have your BOINC clients set up to listen to different ports? That's what I had to do to prevent a problem in the last post. I changed the WSL2 one as it was easier but that made managing it through command line more difficult.

If this is still an issue for anyone, I used BoincTasks to control both the Windows and Linux (Ubuntu 20.04) side:
https://www.cpdn.org/cpdnboinc/forum_thread.php?id=9025&postid=63488#63488
https://www.cpdn.org/cpdnboinc/forum_thread.php?id=9025&postid=63489#63489

I am sure WSL2 has changed in the meantime, but that part of it should still be the same I expect.


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