Re: Hangs and reboots under high loads, oops with DEBUG_SHIRQ

[Mr. James W. Laferriere]

	Hello Atilla ,

On Thu, 2 Aug 2007, Attila Nagy wrote:
> On 2007.08.01. 0:08, Roger Heflin wrote:
> > Attila Nagy wrote:
> > > HARDWARE ERROR
> > > HARDWARE ERROR. This is *NOT* a software problem!
> > > Please contact your hardware vendor
> > > CPU 1 BANK 0 TSC 1167e915e93ce
> > > MCG status:RIPV MCIP
> > > MCi status:
> > > Uncorrected error
> > > Error enabled
> > > Processor context corrupt
> > > MCA: Internal Timer error
> > > STATUS b200004010000400 MCGSTATUS 5
> > > This is not a software problem!
> > > Run through mcelog --ascii to decode and contact your hardware vendor
> > >
> > > HARDWARE ERROR
> > > HARDWARE ERROR. This is *NOT* a software problem!
> > > Please contact your hardware vendor
> > > CPU 1 BANK 5 TSC 1167e915e9ea8
> > > MCG status:RIPV MCIP
> > > MCi status:
> > > Uncorrected error
> > > Error enabled
> > > Processor context corrupt
> > > MCA: Internal Timer error
> > > STATUS b200221024080400 MCGSTATUS 5
> > > This is not a software problem!
> > > Run through mcelog --ascii to decode and contact your hardware vendor
> >
> > Attila,
> >
> > We had some issues with very similar boards all of the problems
> > seem to be around the PCIX bus area of the machine, setting the
> > PCIX buses to 66 mhz in the bios made things stable (but slow).   Not using
> > the PCIX bus also seemed to make things work.   We got MCE's and
> > other odd crashes under heavy IO loads.   I believe turning things
> > down to 100mhz made things more stable, but things still crashed.
> >
> > Supermicro reported being able to fix the issue with:
> > setting the PCI Configuration -> PCI-e I/O performance
> > setting to Colasce 128B.
> >
> > I am not exactly sure where to set it as we did not try it
> > as we had already changed to a different motherboard that did not
> > have the issue.
> >
> > If this works please tell me.
> Roger, you are my hero. :)
> With that PCI-e setting (again, for the record, this is on a Supermicro X7DBE 
> motherboard,
> and the BIOS setting is PCIe I/O performance, which has two states: Coalesce 
> and Payload 256B)
> all of the four machines have survived a half day of continous bashing. 
> Previously one, or two
> machines typically fell off after such amount of IO load, so it looks 
> promising so far.
> I hope this won't change over the time.
>
> BTW, this is still with 2.6.21.5, because the SCSI target stuff I use (SCST) 
> has some
> -I hope temporary- problems with changed (deleted) interfaces in newer 
> kernels.
>
> Should the DEBUG_SHIRQ problem in e1000 affect stability (or performance)?
>
> Thanks,

	I too have a SuperMicro MB ,  But it is a X7DB8 .  Same symptoms . 
Reported MCE problems here a couple of times .
	I set the BIOS setting 'PCIe I/O performance', to 'Coalesce' .
 	For everyones information ,  stability went way up ,  scsi IO is ~ half 
,  But if there's no stability ...

	I'm going to try their 1.3b bios update & see if that helps any .
	iirc ,  Some said they'd already acquired the lastest for their MB & 
that did not help them at all .  What th eheck I'll give it a try anyway .
		Hth ,  JimL
--
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| James   W.   Laferriere | System   Techniques | Give me VMS     |
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