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Entry  04 Feb 2008, Robert Pattie, Forum, analyzer crashes at high rates 
    Reply  05 Feb 2008, Stefan Ritt, Forum, analyzer crashes at high rates 
Message ID: 420     Entry time: 04 Feb 2008     Reply to this: 421
Author: Robert Pattie 
Topic: Forum 
Subject: analyzer crashes at high rates 
I'm using midas to read data from a waveform digitizer at event rates of
10-30kHz. To accomplish this the digitizer is read via Block transfers and the
raw data put into a single MIDAS event.  Thus a MIDAS event could contain upto
250 physical events and at maximum 350kBytes.  In the analyzer modules I had
been analyzing the first physics event contained in a MIDAS event with no
problem.  Recently I tried to analyze all the physical events.  At low rates,
100hz-1khz, this was no problem, 1-5 physical events in a MIDAS event.  At
higher rates 10-20kHz, where there are about 40physical events per MIDAS event,
 the analyzer keeps up for a  few seconds then seg faults with " 'shared object
read from target memory' has disappear; keeping it symbols".  Any suggestions as
to why the analyzer is crashing would be very helpful.


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