| TPC digitization for more than 1000 events [message #11926] |
Fri, 27 May 2011 14:05  |
donghee
Messages: 385
Registered: January 2009
Location: Germnay
|
first-grade participant |
From: *kph.uni-mainz.de
|
|
Hi all,
I want to get some advice from all PANDA user!
I'm trying to optimize events numbers for simulation with may11 stable version in my local farm.
I have electron particle simulated mainly in central part, TPC make huge amount of avalanche electron at some particular events in digitization process.
Of course it should take really time....but also not likely, usage of memory increase more and more if the events are going to more than ~1000 events. Then finally jobs crash...without output.
Memory RAM set 8 GB and swap allocates 10.0G in my local machine.
But roughly 5% of run, which has 1000 events, have such kind of problem in my machine.
In order to avoid this inefficient memory handling at TPC dig,
I reduce my event number as 200 in run, then looks fine for all.
Does anyone test already TPC Digi part with stable PANDAroot and with more than 10000 events for instance?
Thanks,
Donghee
|
|
|
|
|
|
| Re: TPC digitization for more than 1000 events [message #11929 is a reply to message #11928] |
Fri, 27 May 2011 14:34  |
donghee
Messages: 385
Registered: January 2009
Location: Germnay
|
first-grade participant |
From: *kph.uni-mainz.de
|
|
Hi Felix,
I'm trying now with may11, that is before last stable version at two days ago. It is not really last version at today.
Just one electron in central part ( 100 - 160 degree), gamma and proton only into very forward direction ( 10 degree).
Please don't ask me why there are proton... that is my hobby event. And interaction point is (0,0,30).
So then I have seen some avalanche creation and digitiztion in print out during run of digi macro. It looks like typically this...
| Quote: |
-------------------------------------------------
2020 Avalanches created
0 aggregations done.
3577 Signals created
PndTpcElectronicsTask::Exec
Building up padmap ...finished. 116 pads hit
...........
119 Digis created
|
If TPC procuded really big number of "avalanches created", sometimes more than 200000 for example, here I need quite a time to go further digitization or next event, then increasing memory more and more.
I submit jobs ~100 runs with each 1000 events, got 5% no output due to this problem. Simply machines are down!
If the situation will be improved with really last stable may11 version, then I'm happy, but I think there are not so much diffrences between last and before last.
Best wishes,
Donghee
|
|
|
|
|
|
|
|
|
|
| Re: TPC digitization for more than 1000 events [message #11933 is a reply to message #11932] |
Fri, 27 May 2011 15:00 |
donghee
Messages: 385
Registered: January 2009
Location: Germnay
|
first-grade participant |
From: *kph.uni-mainz.de
|
|
Hi all,
The electron has mostly momentum below 3 GeV. only 2-3% exceed more than 3 GeV.
I'm slightly confusing because of argue of felix.
You produced pion without any problem at (0,0,0).
I have also seen that TPC is very stable with 6 outgoing pion or kaon tracks of psi(3770) decay at interaction IR(0,0,0).
I will inform you further studies after updating of may11.
And I think this is good reference view to know, if we change IR(0,0,30) region, how will TPC perform.
Anyhow, thank you for your listening.
Best regards.
Donghee
|
|
|
|
GSI Forum
Search
Help
Members
Login
Home
