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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 09:40:18 -0700
What does "getconf GNU_LIBPTHREAD_VERSION" report? On my altix I see:
% getconf GNU_LIBPTHREAD_VERSION
NPTL 0.60
%
After setting LD_ASSUME_KERNEL to "2.4.19" I see:
% getconf GNU_LIBPTHREAD_VERSION
linuxthreads-0.10
%
It is only when using the NPTL thread library that I see the problem.
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
>
Of James Bigler
>
Sent: Wednesday, May 25, 2005 9:05 AM
>
Cc: manta@sci.utah.edu
>
Subject: Re: [MANTA] bad exit from bin/manta on Altix
>
>
So this is the kernel I'm using (stock from Mandrake 10.0), and I don't
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see the errors you report. I'm using a fresh update as well.
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>
Linux muzzle.sci.utah.edu 2.6.3-7mdk-p3-smp-64GB #1 SMP Wed Mar 17
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15:34:39 CET 2004 i686 unknown unknown GNU/Linux
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>
Perhaps my kernel isn't new enough?
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>
James
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>
Rocky Rhodes wrote:
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> It will show up in other linux distributions. Google'ing "nptl
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> linuxthreads" gave me a bunch of hits including:
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>
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> http://linuxdevices.com/articles/AT6753699732.html
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>
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> I had tried older versions of the main trunk and didn't have any luck
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> isolating a change. I tried versions back to 308 that all failed
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similarly,
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> and version 300 doesn't build for me. It has probably always been this
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way
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> and I just had this environment variable set when I tried it before.
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>
>
> Rocky
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>
>
>
>
>>-----Original Message-----
>
>>From: owner-manta@sci.utah.edu [mailto:owner-manta@sci.utah.edu] On
>
Behalf
>
>>Of James Bigler
>
>>Sent: Tuesday, May 24, 2005 7:59 PM
>
>>Cc: manta@sci.utah.edu
>
>>Subject: Re: [MANTA] bad exit from bin/manta on Altix
>
>>
>
>>You could try checking out an older version and see if it happens.
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>>
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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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>>
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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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>>>
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>>>
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>>>
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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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>>>
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>>>
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>>>
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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
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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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>>>
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>>>
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>>>
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>>> Rocky
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>>>
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>>>
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>>>
- [MANTA] bad exit from bin/manta on Altix, Rocky Rhodes, 05/24/2005
- <Possible follow-up(s)>
- RE: [MANTA] bad exit from bin/manta on Altix, Rocky Rhodes, 05/25/2005
- RE: [MANTA] bad exit from bin/manta on Altix, Rocky Rhodes, 05/25/2005
- RE: [MANTA] bad exit from bin/manta on Altix, Rocky Rhodes, 05/25/2005
- RE: [MANTA] bad exit from bin/manta on Altix, Rocky Rhodes, 05/25/2005
- RE: [MANTA] bad exit from bin/manta on Altix, Rocky Rhodes, 05/25/2005
- RE: [MANTA] bad exit from bin/manta on Altix, Rocky Rhodes, 05/25/2005
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