1) Message boards : Sixtrack Application : Sixtrack BOINC application on track to be ported to GPUs? (Message 47417)
Posted 24 Oct 2022 by bozz4science
Post:
Just read up on the news in this forum thread and the recent news about Xtrack dev sound very interesting! Thanks for sharing these insights!
2) Message boards : Sixtrack Application : Sixtrack BOINC application on track to be ported to GPUs? (Message 45654)
Posted 9 Nov 2021 by bozz4science
Post:
Exciting news! I'll read through the whole message again later to digest all of the information you relayed to us!

I am curious though as to what your affilition to LHC is as you mention "your teams" a couple times. Your structured and informed message lets me only speculate but I'd guess that you are part of a team of scienctiests working directly with LHC, am I right? Is there already a public Github or Gitlab repo for the XTrack code where we can take a look and track the progress? Can you give us a ballpark number of what performance improvement we could expect with a GPU client version?

Surely, your plan sounds ambitious to deploy the new application here on LHC@Home in the future but I am excited to see the sparked interest in improving the SixTrack code! I'll keep tabs on you and would appreciate if you could occasionally update us on the overall progress.

Have a great week
3) Message boards : Sixtrack Application : Sixtrack BOINC application on track to be ported to GPUs? (Message 45071)
Posted 18 Jun 2021 by bozz4science
Post:
Thanks Toby for referencing this helpful information. I will make time tonight to carefully read all about the Sixtrack app. I definitely see why this wasn't enforced/followed up on as nearly no volunteer would meet the requirements that would allow for this performance boost. Just was curious after it was explicitly mentioned in the talk and stated on the slides to know about the application and potential plans surrounding it. And I also see the point of infrequent Sixtrack work submission.

Unfortunately, I am not proficient in the programming languages needed to develop such a CUDA/opencl app. I'll be happy to continue contributing with my little machines to the CPU app version whenever there is work. But I'll take a closer look at the open source code as you sparked my interest to dig a little deeper.

Thx again for your sources! (The last paper/slide deck mentioned from 2020 definitely looks intimidating...)
4) Message boards : Sixtrack Application : Sixtrack BOINC application on track to be ported to GPUs? (Message 45068)
Posted 18 Jun 2021 by bozz4science
Post:
Here is the link of the YouTube video I referred to in my initial post. You can watch it here: 2021 BOINC Workshop - Day 02 - Laurence Field

By the way, here is a recent news post (27 May, 2021), that mentioned the video recordings of the 2 talks given by LHC representatives at the BOINC workshop. Both very worthwhile watching IMHO. Cheers
5) Message boards : Sixtrack Application : Six second SixTrack? (Message 45011)
Posted 26 May 2021 by bozz4science
Post:
Jim, here is a short technical explanation from a recent BOINC workshop recording. 2021 BOINC Workshop - Day 01 - Nils Høimyr

At ~6:00-6:20 he explains that the short SixTrack runs are essentially particles that are lost in the accelerator.
6) Message boards : Sixtrack Application : Sixtrack BOINC application on track to be ported to GPUs? (Message 45008)
Posted 25 May 2021 by bozz4science
Post:
That much I am aware of. I see your point but don't get really get your reference in regard to my question. I am just curious in the potential energy efficiency boost and core allocation of my machine if this idea were to materialise into a BOINC application. And I wouldn't have brought it up, if it wasn't for the explicit note on the slides in the mentioned BOINC workshop talk.

Would highly appreciate any insight into LHC@H's plans on this!
7) Message boards : Sixtrack Application : Sixtrack BOINC application on track to be ported to GPUs? (Message 45005)
Posted 25 May 2021 by bozz4science
Post:
Recently I have watched the recordings from the BOINC workshop this year and in a video from LHC@Home it was mentioned that the initial code base for the Sixtrack application goes back almost 30 yrs if I am not mistaken. Furthermore, Laurence Field mentioned in his talk that the application had already successfully been developed/deployed and tested server side at LHC and was found to be performing at a level roughly equivalent of 250 CPU cores.

As this was referred to as an ongoing investigation into the possibility of bringing this app to GPUs here on LHC@Home, I was wondering if so from the project lead / management could provide some information about the plans for the future in the sense of a roadmap for Q3/4 2021 for the Sixtrack application.

Thank you
8) Message boards : CMS Application : EXIT_NO_SUB_TASKS (Message 44392)
Posted 26 Feb 2021 by bozz4science
Post:
Thanks for the pointer!

Didn't realize mine were hidden. I usually never do this. Now they should be visible. I'll keep running CMS tasks in the meantime :)
9) Message boards : CMS Application : EXIT_NO_SUB_TASKS (Message 44385)
Posted 24 Feb 2021 by bozz4science
Post:
I just checked my work results, and it seems that I have 70 CMS faulty tasks that all errored out after ~1000 sec. So can I assume this is connected to the said condor problem?

If so, why weren't jobs cancelled then?

Still, happy to see that the issue has been resolved meanwhile and CMS WU are crunching fine again.



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