Re: Memory/data errors

On Mon, 19 Mar 2018 22:06:34 +0000 (UTC)
Eduardo Horvath <[email protected]> wrote:

> On Mon, 19 Mar 2018, Sad Clouds wrote:
> 
> > On Mon, 19 Mar 2018 16:15:56 +0000 (UTC)
> > Eduardo Horvath <[email protected]> wrote:
> > 
> > > On Sun, 18 Mar 2018, Sad Clouds wrote:
> > > 
> > > > Mar 15 17:53:42 ultra10 /netbsd: data error type 32 sfsr=0
> > > > sfva=425de020 afsr=400008 afva=17ff7b6fbf8 tf=0x1186c7ed0
> > > 
> > > Trap type 32 is a memory access error fault.  It happens when
> > > trying to access a device fails.  
> > > 
> > > Since the synchronous fault status register (SFSR) is zero, the
> > > contents of SFVA is probably irrelevent. 
> > > 
> > > The AFSR, however, does have interesting values, so the AFVA is
> > > probably valid.  Ths AFSR has the EDP bit set which indicates data
> > > parity in the E$ SRAM.  Bit 3 in the syndrome is set pointing to
> > > data bits 31-24.
> > > 
> > > The memory coherence domain on ultrasparc processors is the E$.
> > > Since neither the UE nor CE bits are set, this is probably not
> > > indicative of bad DRAM.  And the AFSR is not updated when the EDP
> > > bit is set.
> > > 
> > > The EDP bit indicates an ECC error on data read.
> > > 
> > > I'd say either your E$ SRAM is dying, or some operation is causing
> > > the contents of the E$ SRAM to get corrupted.
> > > 
> > > Eduardo
> > 
> > OK thanks for the info. I have a spare CPU from another Ultra 10,
> > which I can try.  Maybe that one is still OK.
> 
> I don't think the E$ SRAM is on-chip.
> 
> Eduardo

I think it is all part of the same CPU module

https://sep.yimg.com/ay/mxsun/440mhz-sun-ultra-5-10-ultrasparc-iii-cpu-module-p-n-501-5149-5.gif

I've just swapped the module and running build.sh. Let's see what
happens next.