Re: NetBSD 5.0.2 can't handle 7455 CPU @ 1 GHz?

[Donald Lee <MacPPC2%caution.icompute.com@localhost>]

The 7600 "upgrade" card is physically differnt from the G4 tower upgrade
CPUs.

I note that my syslogs also have the cache notation:

>Dec 19 08:30:10 charm /netbsd: cpu0 at mainbus0: 7455 (Revision 2.1), ID 0 
>(primary)
>Dec 19 08:30:10 charm /netbsd: cpu0: HID0 
>8450c0bc<EMCP,TBEN,NAP,DPM,ICE,DCE,SGE,BTIC,LRSTK,FOLD,BHT>, powersave: 1
>Dec 19 08:30:10 charm /netbsd: cpu0: 1000.00 MHz, 256KB L2 cache no parity 
>parity enabled, 2MB no-parity L3 cache (PB2 SRAM) at 4:1 ratio

Yours is a newer CPU rev, too, which may be significant.

I have my doubts about the HW being simply flaky.  Running NetBSD 2.1, it is
rock solid, and as I noted in my other posts, I can track the freezes
to the post 2.1 kernel.

... but I don't know.  I'm speculating.

-dgl-

>Donald,
>
>I am running a sonnet 1 Ghz upgrade card in my powermac 7600 and netbsd 5.0.1 
>with no issue.  I had to compile a custom kernel to enable the backside cache. 
> Here is the kernel output for my cpu:
>
>cpu0 at mainbus0: 7455 (Revision 3.3), ID 0 (primary)
>cpu0: HID0 8450c2bc<EMCP,TBEN,NAP,DPM,ICE,DCE,SPD,SGE,BTIC,LRSTK,FOLD,BHT>, 
>powersave: 1
>cpu0: 1000.00 MHz, 256KB L2 cache no parity parity enabled, 2MB no-parity L3 
>cache (PB2 SRAM) at 4:1 ratio
>
>The system is very stable for me.  Maybe it is the other hardware and not the 
>cpu causing the problems.
>
>Erik
>
>On Dec 19, 2010, at 7:50 PM, Donald Lee wrote:
>
>> Update:
>> 
>> I booted from the CD for NetBSD 2.1, 3.0.3, 4.0.1, 5.0.1, 5.0.2, and 5.1.
>> 
>> It does not fail reliably by any means.  About half the time on average
>> I get the hang.  The symptom is a complete freeze at the console.  Kernel
>> appears dead, network pings are without response, FWIW.
>> 
>> All but 2.1 behave the similarly.  NetBSD 2.1 runs reliably.  I went through
>> 7 installs without any problems.
>> 
>> NetBSD 3.0.3 is particularly bad, in that version, it can't get through the
>> install's first newfs on the "a" partition. (7 GB partition)
>> 
>> Any ideas out there?
>> 
>> It looks like some change between 2.1 and 3.0.3 broke my CPU, but that
>> is just a guess at this point.
>> 
>> -dgl-