GSI Forum
GSI Helmholtzzentrum für Schwerionenforschung

Home » PANDA » PandaRoot » Bugs, Fixes, Releases » Error during PndTpcElectronicsTask
Re: Error during PndTpcElectronicsTask [message #11365 is a reply to message #11362] Mon, 20 December 2010 19:17 Go to previous messageGo to previous message
Felix Boehmer is currently offline  Felix Boehmer
Messages: 149
Registered: May 2007
Location: Munich
first-grade participant

From: *natpool.mwn.de
Dear Stefano,

let's try to be a little more constructive. The "Symbol___G exception" hints towards an uncaught system signal, most likely a bad alloc. Memory load seems to be the most likely reason for these crashes.

In a nutshell: The only way to approach this problem is by scrutinizing some key questions, beginning with memory consumption. The people who have a setup configuration where this problem persistently appears could start by checking the time evolution of memory consumption (a couple of minutes and using simple tools like top should be fine) in different scenarios:

  1. FairLinks in the chain
  2. FairLinks commented out

In this way we can immediately learn if we have a memory leak (continuous growth) or rather one single "bad" event leading to catastrophic memory allocation, and how the presence of the FairLinks affects this - verifying or ruling out your idea that the TPC structure "fights" the FairLinks and that lead to non-linear growth of memory load. Per se, the presence of pointers as member variables shouldn't do ANY harm, since they are nothing more than one 32 (64) bit data block each.

I think this is the baseline homework that has to be done. Please try and let me know.

Cheers

Felix

 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Out of memory problem in EmcPoint - FairLink ?
Next Topic: problem with DpmEvtGen library
Goto Forum:
  


Current Time: Fri Oct 11 16:24:51 CEST 2024

Total time taken to generate the page: 0.00730 seconds