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Erich56

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Message 29392 - Posted: 18 Mar 2017, 16:01:57 UTC

I now changed with one of my PCs on which I have been crunching ATLAS for more than a year, from the ATLAS Project to the LHC@home Project.
Although according to the Project Status page more than 200 ATLAS Tasks are shown as "unsent", BOINC tells me that none are available.

Am I doing something wrong, or is the error somewhere else?
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PHILIPPE

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Message 29393 - Posted: 18 Mar 2017, 16:31:41 UTC - in response to Message 29392.  

What are the parameters you put in your preferences account for :
#max cpu and #max job?
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Jim1348

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Message 29394 - Posted: 18 Mar 2017, 16:33:54 UTC

Also, ATLAS is still in beta, so you must check "Run test applications?" in the preferences.
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Erich56

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Message 29395 - Posted: 18 Mar 2017, 17:18:54 UTC - in response to Message 29393.  

What are the parameters you put in your preferences account for :
#max cpu and #max job?

3 each.

so far, on the ATLAS Project, I ran 3 tasks with 3 cores each (using a total of 9 cores).

Is my assumption right that with Parameters 3 and 3 I will have same situation?
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Erich56

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Message 29396 - Posted: 18 Mar 2017, 17:20:23 UTC - in response to Message 29394.  

Also, ATLAS is still in beta, so you must check "Run test applications?" in the preferences.

if I read correctly in another thread of the message board, the test application are all "longrunners" with 10-fold crunching time - correct?
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Message 29398 - Posted: 18 Mar 2017, 17:26:25 UTC
Last modified: 18 Mar 2017, 17:27:17 UTC

the test application are all "longrunners" with 10-fold crunching time - correct?

Not all, it is a combination of "normal" and "long" runners. The normal ones have a run time similar to the tasks in ALTAS project. For the time being there is no mean to select normal only or long only tasks.
We are the product of random evolution.
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Erich56

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Message 29400 - Posted: 18 Mar 2017, 19:01:30 UTC

it all works well now. New tasks were downloaded (so far, no "longrunners").
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Erich56

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Message 29402 - Posted: 18 Mar 2017, 21:00:20 UTC

what I noticed now:

in contrast to how it worked with the former ATLAS Project, now with the LHC@home Project no jobs beyond the preset number of jobs can be downloaded.

In other words: before, for example I had 3 tasks running, and - depending of the computing preferences in BOINC - several additional jobs were "ready to start".
Now, with LHC@home this is impossible. When I have 3 tasks running and push the "update" button in BOINC, it says "the computer has reached a limit on tasks in progress".
Why so?
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Message 29403 - Posted: 19 Mar 2017, 2:42:38 UTC

Erich, if you want to have, say, 6 tasks downloaded and only 3 running concurrently, you need:
1. To set Max # jobs to 6 in LHC@Home preferences.
2. To set max_concurrent to 3 in app_config.xml
<app>
<name>ATLAS</name>
<max_concurrent>3</max_concurrent>
</app>
This should achieve what you are looking for.
We are the product of random evolution.
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Erich56

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Message 29414 - Posted: 19 Mar 2017, 12:00:04 UTC - in response to Message 29403.  

This should achieve what you are looking for.

Thanks, Herve - it does :-)
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David Cameron
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Message 29432 - Posted: 20 Mar 2017, 9:42:24 UTC

We should have more tasks later today (the normal ones, not the longrunners). If these tasks look ok I plan to take ATLAS out of beta.
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Message 29440 - Posted: 20 Mar 2017, 15:15:00 UTC - in response to Message 29432.  

New tasks are available now, but they look like they will run a bit longer than the previous batch. They are not as long as the "longrunners" but probably 4 times as long as before.
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maeax

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Message 29441 - Posted: 20 Mar 2017, 15:51:22 UTC

2 CPU's and Virtualbox 5.1.18. Ended after 15 Minutes.

https://lhcathome.cern.ch/lhcathome/result.php?resultid=127234256

Any idea?
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Message 29444 - Posted: 20 Mar 2017, 16:53:12 UTC - in response to Message 29441.  

2 CPU's and Virtualbox 5.1.18. Ended after 15 Minutes.

https://lhcathome.cern.ch/lhcathome/result.php?resultid=127234256

Any idea?

Not shure if my clients have already picked up the latest WUs, but from my latest WUs the runtime has already climbed up to 50 minutes


Supporting BOINC, a great concept !
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Crystal Pellet
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Message 29445 - Posted: 20 Mar 2017, 17:06:41 UTC - in response to Message 29441.  

2 CPU's and Virtualbox 5.1.18. Ended after 15 Minutes.

https://lhcathome.cern.ch/lhcathome/result.php?resultid=127234256

Any idea?

From your stderr output:

2017-03-20 16:27:28 (5920): Setting Memory Size for VM. (3600MB)
2017-03-20 16:27:28 (5920): Setting CPU Count for VM. (2)


As written before, a multi core (so also a dual core) needs at least 4400MB of RAM.
You can manage that with an app_config.xml or select in your preferences 1 job with 3 cores to get a VM with 4600MB of RAM running.
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maeax

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Message 29449 - Posted: 20 Mar 2017, 18:33:14 UTC

Thanks Crystal,

the long-runner had 3 CPU's and finished correct.
Atlas@home tasks with 2 CPU's had running without app_config.xml a long time for me.

Than must Atlas under LHCatHome need more RAM?
Had made no change in boinc-manager.
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Crystal Pellet
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Message 29450 - Posted: 20 Mar 2017, 18:53:05 UTC - in response to Message 29449.  

Than must Atlas under LHCatHome need more RAM?

Only for a dual core. It's not configured well for 2 core VM's, cause the server is using the formula 1.6GB + 1GB/core.
For 1 core it's OK and for 3 and more cores also.
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Message 29460 - Posted: 20 Mar 2017, 21:11:41 UTC
Last modified: 20 Mar 2017, 21:12:06 UTC

See this post for a bit more explanation on the changes between ATLAS and LHC:
https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=4166&postid=29459#29459
We are the product of random evolution.
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