[Halld-offline] observations after updating to the latest trunk version and hangup problem

[Richard Jones]

Kei,

Once again, I want to emphasize that "DISABLE_SIMD=1" is not a satisfactory fix.  Please see my earlier note to Matt for a diagnosis of the segfaults you were seeing earlier.  IMO, you are better off to understand the fault than stumble around it like this.  In the long run, we should all be running with SSE or without, not some with and some without.  All presently running hardware (except museum pieces) supports SSE, but you have to build on the hardware where you want to run it.

-Richard J.

On 3/2/2011 4:02 PM, Kei Moriya wrote:
> Dear all,
>
> After three days of struggling, I have finally
> been able to install the current trunk code and
> run my analysis programs. Most of my trouble seems
> to have stemmed from
> 1. an older jana version being used,
> 2. omitting the DISABLE_SIMD=1 flag for make
> For 2., it seems setting this in my .tcshrc does
> not have an effect, and I need to type
>   >  make DISABLE_SIMD=1
> on the command line.
>
> One more thing I noticed is that the "workaround"
> for the hangup/infinite loop problem still needs to be
> implemented. I tried running my analysis program
> without the workaround, and it silently stopped
> processing after ~2k events. After implementing
> the workaround, the code successfully ran on 10k
> events. Although I do not expect any, I will run
> several million events on the clusters tonight to see
> if there are further problems.
>
> Just to be sure, the "workaround" is setting the
> optimization flag to 0 in Makefile.common and then
> compiling DTrackCandidate_factory_CDC.cc
> After that, the flag is returned to 2 to compile
> other programs.
>
> 	Kei
>
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