1) Message boards : ATLAS application : 100% errors (Message 29968)
Posted 19 Apr 2017 by Profile den777
Post:

You think the problem of the failing long-runners has to do with the memory size?

Nope, I didn't say that.
2) Message boards : ATLAS application : 100% errors (Message 29957)
Posted 18 Apr 2017 by Profile den777
Post:
Ok, with 1 cpu it works fine.
"Bad tasks" fail by itself after some minutes and "good tasks" successfully finish and get validated.

4200-4800Mb of memory is not enough for 2 cores (or 6Gb is not enough for virtualbox to run such virtual machines, I'm not sure)
4200Mb is enough for single-core core VMs :)
3) Message boards : ATLAS application : 100% errors (Message 29942)
Posted 16 Apr 2017 by Profile den777
Post:
Given your machine only seems to have two cores and 6GB of RAM (if I've read the specs page for that computer correctly), maybe it's underpowered for running ATLAS on two cores and you should consider cutting back to using only one core with a commensurate drop in the RAM setting.

This is the main problem, I think.
2 cores VB machine has 4200 Mb memory limit by default, my computer has 6 Gb. What wrong with this? And what is the real memory requirement for such tasks? If 4.2Gb is not enough for 2 cores, why virtual machines still misconfigured? If 6Gb of total memory is not enough for 2 cores VB machine, why this tasks is still being sent?
It's an old issue, since atlas@home were a separate project. But nobody's care.

I changed app_config.xml to 1 avg_ncpus, so let's see how it works.
4) Message boards : ATLAS application : 100% errors (Message 29940)
Posted 16 Apr 2017 by Profile den777
Post:
Why all tasks finish with errors?
I checked everything, I even increased memory for VM for 2CPUs up to 4800Mb, but still cannot get any successfull task.
https://lhcathome.cern.ch/lhcathome/results.php?userid=269482
EVERY task is either computation error or validation error, not only for me but for wingmen too. Is this subproject really working?



But wait, miracle happened, I got 1 (one) successfull task. Only one task between 20. Is this rate ok for this project?

This is my app_config.xml
<app_config>
<app>
<name>ATLAS</name>
<max_concurrent>1</max_concurrent>
</app>
<app_version>
<app_name>ATLAS</app_name>
<avg_ncpus>2.000000</avg_ncpus>
<plan_class>vbox64_mt_mcore_atlas</plan_class>
<cmdline>--memory_size_mb 4800</cmdline>
</app_version>
</app_config>
5) Message boards : Number crunching : VirtualBox and Linux (Message 28114)
Posted 14 Dec 2016 by Profile den777
Post:
Actually default Linux installation is the same as "service install" in Windows. Separate accounts for security reasons. Theoretically you can download and unpack boinc client in your home directory and run it under your account manually, and this is supposed to be the same as in Windows without service install (I din't try this, but I think it is possible).
Nevertheless, this is not LHC issue, this is common issue of BOINC with other OSes. If you want, ask about this on boinc offical forums.
PS: Sry for my English, hope you understand what I meant.
6) Message boards : Number crunching : VirtualBox and Linux (Message 28111)
Posted 14 Dec 2016 by Profile den777
Post:
BOINC in Linux uses separate account, so you need to run VboxManager under "boinc" username.
It's kinda like
$ sudo su -s /bin/sh -c VirtualBox boinc



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