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Re: AMD FX-6100 boot pauses with ACPI

On 02/01/12 14:42, Paul Goyette wrote:
It would be best to get the output of 'cpuctl identify 0' from the
system in question. AMD cpu families include the extended family field,
and it could be that Bulldozer is family 16 or 17...

Bulldozer is family 0x15.


On Wed, 1 Feb 2012, Jukka Ruohonen wrote:

On Wed, Feb 01, 2012 at 09:56:22AM +0000, Ian Clark wrote:
Yup, I think it's 0x15. Even checked with a printf in the above code
to be sure. :) (As I don't really know what I'm doing.)

However applying the above didn't seem to change anything.

The last time I checked, AMD did not have a BKDG ("bios and kernel
developer's guide") for family 15h yet, so I don't know about the
details of C1E on Bulldozers. Of course this is entirely NetBSD's fault,
as all C1E-problems are caused by the fact that C-states are not
supported, whatever their name may be.

When fiddling again last night I did notice the bios setting has 'on,
off and auto', is there any chance that 'on' could be causing the
above to be ignored?

Could be, but no idea.

(root:/usr2/src)# cvs diff sys/arch/x86/acpi/acpi_cpu_md.c
Index: sys/arch/x86/acpi/acpi_cpu_md.c
RCS file: /cvsroot/src/sys/arch/x86/acpi/acpi_cpu_md.c,v
retrieving revision 1.69
diff -r1.69 acpi_cpu_md.c
case 0x15:


AS the problem can be addressed by flipping a setting I'm not worried
about it so please don't spend too much time, however I'm happy to try
stuff if you want help tracking it down.

Well, as I wrote above, we don't need to track it down or add more weird
quirks -- we simply need to support C-states. Unfortunately, this is
said than done (requires in-depth knowledge particularly about x86
which are kind of a mess in NetBSD ATM).

- Jukka.


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