What version of LAM are you using?
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On Oct 26, 2006, at 6:28 PM, Lily Li wrote:
> Hi, Andrew,
>
> The workload for LAM/MPI is about the same. The only thing changed
> lately is the kernel, that's why we are wondering if we should
> recompile
> LAM or our applications.
>
> When upgrading kernel, does the system header files (those in
> /usr/include) change ?
> Probably not, from 2.6.9-34 to 2.6.9-42.
>
> We've been having this lamnodes hanging problem for a while, but
> roughly
> in a rate of once a month. Lately it increases to once in less than a
> week.
>
> Regards,
> Lily
>
> -----Original Message-----
> From: Andrew Friedley [mailto:afriedle_at_[hidden]]
> Sent: Thursday, October 26, 2006 9:49 AM
> To: General LAM/MPI mailing list
> Subject: Re: LAM: Do we need to recompile LAM and applications after
> weupgrade the linux kernel ?
>
> Lily Li wrote:
>>
>> Hello, everyone,
>>
>> It seems that after we upgrade the linux kernel from
>> 2.6.9-34.Elsmp to
>
>> 2.6.9-42.Elsmp for our Pentium III cluster, we start having a higher
>> rate of lamd hanging problem on the headnode. The lamd will not
>> response to the command "lamnodes" after the LAM is booted and used
>> for couple of days.
>>
>> The question is : do we need to recompile/link the LAM and the
>> applications after we upgrade the linux kernel ?
>
> I'm not sure why lamd would hang, but I certainly wouldn't expect
> changing the kernel to cause it.. especially when both are 2.6.9.
>
> Exactly how often was lamd hanging before, and how often is it hanging
> now?
>
> I'm wondering if something else on the system is causing it.. Does
> changing back to the old kernel take you back to the old lamd
> behavior?
> Has your LAM/MPI workload changed? Anything else?
>
> Andrew
>
>
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--
Jeff Squyres
Server Virtualization Business Unit
Cisco Systems
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