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Re: bzip2 unaligned trap

Hello Norbert,

At 08:00 25.08.2005, you wrote:
With this kernel I get permanent unaligned trap errors from bzip2:
bzip2(10013): unaligned trap at 00000200000c3074: 00020c5100020c3d 28 1

Does anyone know wether this is a hardware or software problem?

This is a software problem that lies in the ALPHA RISC processor architecture. The processor cannot access memory that is not aligned at boundaries conforming to the datatype to be read/written. The kernel fixes this by doing separate reads/writes that are aligned.
The only drawback with this is that it is a performance problem.
To fix this write a bug report for BZIP or the software that generates the problem. But do not exspect that they fix this because alpha is not the main platform and most developers do not have such a processor.


Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de - http://www.schindlers-software.de
eMails: uwe@thetaphi.de (private); info@schindlers-software.de (company)
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