Bumping MAXCPU for MIPS configurations

[Attilio Rao]

2011/7/3 Jayachandran C. <c.jayachandran at gmail.com>:
> On Wed, Jun 29, 2011 at 4:48 PM, Attilio Rao <attilio at freebsd.org> wrote:
>> 2011/6/29 Jayachandran C. <c.jayachandran at gmail.com>:
>>> On Wed, Jun 29, 2011 at 3:10 PM, Attilio Rao <attilio at freebsd.org> wrote:
>>>> [ Please CC me in replies as I'm not subscribed to this mailing list ]
>>>>
>>>> I'm planning to bump MAXCPU for all the kernel configurations
>>>> requiring it, as long as the latest cut of largeSMP changes is
>>>> completed.
>>>>
>>>> Anyway, I'm not really sure what MIPS configurations may benefit from
>>>> a larger number of MAXCPU. Probabilly XLP should, for what I've heard,
>>>> but I'd like to get a precise mapping between configurations that want
>>>> to bump the number and the actual maximum number of CPUs to be
>>>> supported.
>>>
>>> An XLP SoC has 32 cpus (8cores x 4 hw threads per core), and 4 of
>>> these can be interconnected to have upto 128 cpus.  We have an XLP
>>> port running on one chip with 32cpus, but there is interest in trying
>>> out 2 chip (64cpus) and 4 chip(128 cpus) configurations, so this is
>>> something I want to do when I get access to multi-chip boards for
>>> FreeBSD development.
>>
>> I'll bump MAXCPU to 128 for XLP then, thanks.
>> Do you have informations about XLR?
>
> For XLR the the MAXCPU should be 32 (8 cores x 4 threads per core on
> the SoC). We cannot connect multiple chips together like the XLP.

So what do you think about this patch?:
http://www.freebsd.org/~attilio/maxcpu_bump.diff

I already got Marcel's approval on ia64 part, but I need you review
the mips bits.

Thanks,
Attilio


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