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- From: Rocky Rhodes <rhodes@sgi.com>
- To: "'James Bigler'" <bigler@cs.utah.edu>
- Cc: manta@sci.utah.edu
- Subject: RE: [MANTA] bad exit from bin/manta on Altix
- Date: Wed, 25 May 2005 08:31:52 -0700
It will show up in other linux distributions. Google'ing "nptl
linuxthreads" gave me a bunch of hits including:
http://linuxdevices.com/articles/AT6753699732.html
I had tried older versions of the main trunk and didn't have any luck
isolating a change. I tried versions back to 308 that all failed similarly,
and version 300 doesn't build for me. It has probably always been this way
and I just had this environment variable set when I tried it before.
Rocky
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-----Original Message-----
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From: owner-manta@sci.utah.edu [mailto:owner-manta@sci.utah.edu] On Behalf
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Of James Bigler
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Sent: Tuesday, May 24, 2005 7:59 PM
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Cc: manta@sci.utah.edu
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Subject: Re: [MANTA] bad exit from bin/manta on Altix
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You could try checking out an older version and see if it happens.
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The Thread_pthread.cc file is pretty hairy. The altix is the only
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machine we've had complaints about, though. Should this be showing up
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in other modern distributions? What do the SGI docs say about that?
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>
James
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Rocky Rhodes wrote:
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> If I run "bin/manta -bench 10 10 -imagedisplay null -np 2" on an Altix,
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> the program exits in a bad way, complaining of "ERROR: Incorrect Phase"
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> and then telling me that "Thread 'idle or main'" got a SIGSEGV. If I
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> run this again with the LD_ASSUME_KERNEL environment variable set to
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> "2.4.19" it exits cleanly.
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> SGI's documentation says that this behavior is indicative of an
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> application "which depends on behaviors in which the LinuxThreads
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> implementation deviates from the POSIX standard". The LD_ASSUME_KERNEL
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> environment variable forces the application to use the old LinuxThreads
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> implementation rather than NPTL (Native POSIX Thread Library). I think
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> the new thread package was included with ProPack 3.0 on the Altix. You
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> might not see this problem on your Altix if it is running an earlier
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> version of the system software.
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> I thought I had tried this earlier and didn't have this problem, but as
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> it is just an environment variable, now I'm wondering if this has always
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> been broken this way. Is anyone aware of any changes in the pthread
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> code made over the last week or so that may have changed this behavior?
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> Does anyone feel more qualified than I do about mucking around in this
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> code and trying to understand what goes on when the program exits?
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> Rocky
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