1) Message boards : ATLAS application : Only 6 concurrent tasks per computer? (Message 34354)
Posted 9 days ago by Toby Broom
Post:
I will just leave on 3, I wanted to contribute more to ATLAS but I can get more out of my computer with the settings that are favorable for the other projects.
2) Message boards : ATLAS application : Only 6 concurrent tasks per computer? (Message 34348)
Posted 10 days ago by Toby Broom
Post:
Maybe the 10k is to limit backend issues like we saw reciently?

The boinc scheduing will work out how many tasks to buffer so that the limits can be reached.
3) Message boards : ATLAS application : Only 6 concurrent tasks per computer? (Message 34316)
Posted 11 days ago by Toby Broom
Post:
I could only get 3 WU/Host with the unlimited settings, setting back to 8 allowed 8.

before it was 24, is there a plan to allow 24 again?
4) Message boards : Sixtrack Application : AVX Sixtrack version (Message 34296)
Posted 13 days ago by Toby Broom
Post:
Happy to try for you in a few weeks when I can build my x299 rig
5) Message boards : Sixtrack Application : AVX Sixtrack version (Message 34294)
Posted 14 days ago by Toby Broom
Post:
HI, any benefit for AVX-512?
6) Message boards : Number crunching : How many cores does a vbox64 LHC use? (Message 34201)
Posted 18 days ago by Toby Broom
Post:
The number of cores used can be adjusted here:



The default is 1 for ATLAS tasks.
7) Message boards : CMS Application : CMS Tasks Failing (Message 34155)
Posted 21 days ago by Toby Broom
Post:
I checked today I'm at similar %. Of these failed it's 75% Error 152 (Could not connect to Condor) or 206 can not ping condor.

The a few where the VM could be started and one heartbeat missing.

Just for reference:

LHCb = 1.49%
ATLAS = 1.23%
Theory = 26.82% :( = Seems mostly as there was no work in the queue or same 152 errors.
SixTrack = 0.19% :)
8) Message boards : Number crunching : Please give the scheduler a kick ... (Message 34148)
Posted 21 days ago by Toby Broom
Post:
Mine were bad this morning but now they are OK so kick was provided?
9) Message boards : News : Thanks for supporting SixTrack at LHC@Home and updates (Message 34147)
Posted 21 days ago by Toby Broom
Post:
Hello Donotneedtono, wellcome, 1st post.

The project does not have any GPU work units currently so your not missing out.

In theory there would be a speed to use a GPU but in practice I think it would be limited, when you think about sixtrack you have to calculate the path of a particle at close the the speed of light, I imgaine the caculations are done in double precision to get the most accurate possiable results. With consumer GPUs the double precision performance is lowered to ensure there is value in the profession products. In addition there is probally singinificant work to port the code to GPU and ensure numerical accuracy, even with different OS's there is a challenge here. So unlikly that there would be a GPU app but never say never :)
10) Message boards : Sixtrack Application : "no tasks are available for Sixtrack", over 1 million visible (Message 34140)
Posted 21 days ago by Toby Broom
Post:
I just got some on one computer, the only think I notice is that the 2 that are stuck have AMD GPU, so maybe the fact the the project is missconfigured for AMD GPU causes a problem?
11) Message boards : Sixtrack Application : "no tasks are available for Sixtrack", over 1 million visible (Message 34138)
Posted 21 days ago by Toby Broom
Post:
I see the same, athough one of my computers cached 150 tasks even though I have it set for 0.5day
12) Message boards : CMS Application : CMS Tasks Failing (Message 34132)
Posted 22 days ago by Toby Broom
Post:
For me I have 2.6% of CMS fail, it's OK for me normally they only waste 10min.
13) Message boards : Sixtrack Application : Transfer issues (Message 34128)
Posted 22 days ago by Toby Broom
Post:
Hi Alessio,

There is an option in BOINC to priotrise re-issues, called https://boinc.berkeley.edu/trac/wiki/ProjectOptions#Acceleratingretries

May you can check the settings with IT?
14) Message boards : LHC@home Science : Use of AVX App (Message 34068)
Posted 26 days ago by Toby Broom
Post:
There is some list here:

https://en.wikipedia.org/wiki/Advanced_Vector_Extensions

You can check in BOINC at start up

13-Jan-2018 12:20:43 [---] Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss htt tm pni ssse3 fma cx16 sse4_1 sse4_2 movebe popcnt aes f16c rdrandsyscall nx lm avx avx2 vmx tm2 dca pbe fsgsbase bmi1 hle smep bmi2

Seems like on SixTrack uses at the moment
15) Message boards : ATLAS application : Unable to upload an Atlas task (Message 34059)
Posted 26 days ago by Toby Broom
Post:
This is discussed in the news section, they are working to improve things, if you wait then they'll upload eventually.
16) Message boards : Sixtrack Application : AVX Sixtrack version (Message 33985)
Posted 20 Jan 2018 by Toby Broom
Post:
I agree I think it's BOINC issue.

What about "grep avx /proc/cpuinfo"

Green in HWINFO means eanabled and feature is there, red woudl be ther ebut dissabled and grey is not there.

Worked it out, WindowsXP doesn't support AVX, so you need another OS for support.
17) Message boards : Sixtrack Application : AVX Sixtrack version (Message 33979)
Posted 20 Jan 2018 by Toby Broom
Post:
There is an office test data set in the code, I think you have to build it yourself though.

https://github.com/SixTrack/SixTrack
18) Message boards : Sixtrack Application : AVX Sixtrack version (Message 33978)
Posted 20 Jan 2018 by Toby Broom
Post:
hwinfo64 shows if the feature is on vs avaliable
19) Message boards : Sixtrack Application : AVX Sixtrack version (Message 33954)
Posted 20 Jan 2018 by Toby Broom
Post:
@Magic, that how the sixtrack tasks work, if the calculations aren't stable then it will be short task, I see a mix of long and short tasks as per normal for sixtrack. I scheduler probally needs some more time to create the correct buffer although with the nature of six tract that is tough too. Maybe you can edit a config file to spoof that you don't have avx?

@Erich, on my windows 10 computer I don't see this avx dll and have crunched many WU, so I don't think that is the problem. What do you see under [---] Processor features: on startup?
20) Message boards : Number crunching : Impossible to send some result to LHC (Message 33943)
Posted 19 Jan 2018 by Toby Broom
Post:
This is the problem that is discussed in the news.

https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=4567


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