1) Message boards : Sixtrack Application : Very long Tasks (Message 39280)
Posted 4 Jul 2019 by Profile ritterm
Post:
Whoa...

Workunit 117930579

Workunit 117930567

Workunit 117930673

Great job, many many thanks!

Always a pleasure to grind it out for my favorite project... :-)
2) Message boards : Sixtrack Application : Very long Tasks (Message 39248)
Posted 3 Jul 2019 by Profile ritterm
Post:
Whoa...

Workunit 117930579

Workunit 117930567

Workunit 117930673
3) Message boards : Theory Application : Improving Performance of a 4GB RAM Host (Message 37580)
Posted 9 Dec 2018 by Profile ritterm
Post:
Vboxwrapper is running on a lower priority than VirtualBox's VBoxSVC.exe.
Therefore on busy systems the communications between those 2 processes is sometimes too slow for the wrapper.
You could lower VBoxSVC.exe priority to 'below normal' before a Vbox-task has started and raise the priority of vboxwrapper to 'below normal' too or even 'normal'.

Thanks for the feedback, Lammert (I was hoping I might hear from you!).

While trying to figure out what -- if anything -- I can do to get more out of this host on LHC, I haven't been running any other projects. On this Windows machine, I'm not sure how identify and change the vboxwrapper and vboxsvc process priorities and I'm not sure it's worth the trouble to do that every time a new task starts (if that's what you mean). I think I'll probably just move this host to another project. I've got 18 other cores running Theory and Atlas tasks without any problem.
4) Message boards : Theory Application : Improving Performance of a 4GB RAM Host (Message 37577)
Posted 9 Dec 2018 by Profile ritterm
Post:
I have a host (Win10-64, 4GB RAM, Q6600, BOINC 7.14.2, VBox 5.2.8) that I'm pretty sure used to be able to run at least 2 (if not 3 or 4) Theory tasks at a time in the days before the multi-threaded app. It seems now that it will successfully and consistently complete a Theory task using the MT app when running only one task at a time that is allotted one core (leaving the other three cores mostly idle).

Although it has completed one task at a time using both two and four cores, they ran for only a short period of time (less than 30 minutes). Otherwise, all tasks with (1) more that one core allotted or (2) multiple tasks with a single core allotted, resulted in a computation error with an EXIT_ABORTED_BY_CLIENT code and a line in the stderr output "VM Heartbeat file specified, but missing heartbeat."

Also, although the one task/one core tasks complete, the VM log is full of the "Giving up catch-up attempt" messages.

Is there anything I can do to improve the performance or is this host simply underpowered for today's VM work? It's disappointing that I can't fully utilize it at LHC when there are no SixTrack tasks... :-(
5) Message boards : Theory Application : New version 263.90 (Message 37503)
Posted 3 Dec 2018 by Profile ritterm
Post:
However, even several hours after you wrote your posting, I got the "no subtasks" error many times...

Maybe I'm just lucky or am missing the point, but I have a Theory task that's been running on my 8-core AMD for over 8 hours. If it wasn't getting any jobs, wouldn't it crash, eventually?
6) Message boards : ATLAS application : New specific file upload error (Message 33619)
Posted 2 Jan 2018 by Profile ritterm
Post:
What's this all about?

There are several mentions of this kind of error in the Uploads of finished tasks not possible since last night thread. Of particular interest might be Message 33420.
7) Message boards : Sixtrack Application : Transfer issues (Message 33503)
Posted 25 Dec 2017 by Profile ritterm
Post:
I am still getting "12/25/2017 12:41:47 AM | LHC@home | No tasks are available for SixTrack"

Same here. I think I stopped getting them soon after the time of my last post! :D
8) Message boards : Sixtrack Application : Transfer issues (Message 33498)
Posted 24 Dec 2017 by Profile ritterm
Post:
...Oh and on the status page it says 1,360,881 SixTracks to send so since I can't get any of them maybe they stopped sending just so this upload before deadline problem doesn't get worse than it is.

I'm getting tasks on my two hosts (both Linux) that are running Sixtrack right now. It hasn't been steady -- I'm getting the "no tasks are available" message, too -- but enough tasks come in to keep the caches relatively full.
9) Message boards : News : BOINC server update Thursday (Message 33430)
Posted 17 Dec 2017 by Profile ritterm
Post:
I suggest a different color be used for the text for the following links so they are easier to see:

1) "Show names" for tasks on the user tasks pages
2) "Switch View" on the user preferences pages
10) Message boards : ATLAS application : Uploads of finished tasks not possible since last night (Message 33396)
Posted 15 Dec 2017 by Profile ritterm
Post:
Some progress, perhaps... I've manged to upload and report six of eight tasks that were stuck uploading. The two that are still there were the first ones to get stuck, I believe.
11) Message boards : CMS Application : no new WUs available (Message 33270)
Posted 11 Dec 2017 by Profile ritterm
Post:
CMS jobs have spiked back up and I just got a task. Are we back for good?
12) Message boards : CMS Application : no new WUs available (Message 33262)
Posted 10 Dec 2017 by Profile ritterm
Post:
...so I opened a ticket with CERN IT. I don't really expect a response from them until some time tomorrow, unfortunately.

Sounds like a good time to open the spigot and run a few more Theory jobs... :D
13) Questions and Answers : Sixtrack : VirtualBox is not installed (Message 33254)
Posted 9 Dec 2017 by Profile ritterm
Post:
...im not gonna waste time on something that is so obviously flawed...

It does take a bit of effort to get VM tasks at this project running smoothly, but I don't think that "flawed" is a fair characterization. If you want to participate in this project and don't want to wait for the times that there is Sixtrack work, I recommend you follow Yeti's excellent checklist to see if you can get VM tasks up and running (perhaps starting with Theory which has the lowest RAM requirement and is not multi-core).
14) Message boards : News : BOINC server update Thursday (Message 33251)
Posted 8 Dec 2017 by Profile ritterm
Post:
Further feedback:

-- Message board: font for quotes too large....

+1
15) Questions and Answers : Sixtrack : VirtualBox is not installed (Message 33245)
Posted 8 Dec 2017 by Profile ritterm
Post:
...i recently reinstalled my whole OS and apps, and after that LHC worked. it crunched a couple of units, and now i get this "virtualbox not installed" nonsense...so whats going on here?

Sixtrack is the only sub-project at LHC that does not require VirtualBox and there are no Sixtrack tasks available to run right now (see "Tasks by application" on the server status page). Are your preferences set to only accept work for Sixtrack?
16) Message boards : ATLAS application : Performance 4-core VM versus 3-core VM (Message 33227)
Posted 7 Dec 2017 by Profile ritterm
Post:
For several days now, I've been running the vbox64_mt_mcore app set to use four cores of my six-core, 16GB RAM AMD/Linux host. Of 39 valid results, I'm seeing CPU-time/Run-time efficiencies of 63%-83%, depending on the length of the task.

Is that about what I can expect or should they be doing better than that? Right now, I'm running CPDN tasks on the other two cores and I haven't checked to see if leaving those cores idle makes a difference. Maybe I'm naive, but I wouldn't expect that to make a difference.
17) Message boards : Number crunching : VM environment need to be cleaned up. (Message 33182)
Posted 1 Dec 2017 by Profile ritterm
Post:
...I always just check my VB Manager/File/Virtual Media Manager and *remove* them myself...

So, do you just remove/delete the vm_image.vki files that aren't attached to anything?
18) Message boards : CMS Application : no new WUs available (Message 33166)
Posted 30 Nov 2017 by Profile ritterm
Post:
Looks like the CMS queue is running dry... Server Status shows 7 unsent tasks and I returned 3 results that ended like this:

2017-11-30 00:34:19 (23855): Guest Log: [ERROR] No jobs were available to run.
19) Message boards : Number crunching : -152 (0xFFFFFF68) ERR_NETOPEN and 206 (0x000000CE) EXIT_INIT_FAILURE (Message 33163)
Posted 29 Nov 2017 by Profile ritterm
Post:
I just wanted to bump this up and report that I've been seeing bursts of these same errors recently. Maybe I should be posting this is the LHCb forum, because, for me, they've been occurring primarily, if not exclusively, on LHCb tasks.

Perhaps I should have added that I'm seeing this LHCb behavior on two 16GB RAM Linux hosts that are running two CMS, two Theory, and two LHCb tasks concurrently. No significant issues with CMS or Theory, that I can tell.
20) Message boards : LHCb Application : Relative Efficiency of LHCb Tasks (Message 33161)
Posted 29 Nov 2017 by Profile ritterm
Post:
I see LHCb jobs running from 18 minutes to 13 hours on an i7-4770. So it appears that it varies a lot.

Yeah, I've had those long runners, too, but not in the last couple of days. Maybe my real question is about the nature or amount of the current LHCb work or how it's distributed.


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