Re: Bumping MAXCPU on amd64?

2010/9/22 Maxim Sobolev <sobomax_at_freebsd.org>:
> Hi,
>
> Is there any reason to keep MAXCPU at 16 in the default kernel config? There
> are quite few servers on the market today that have 24 or even 32 physical
> cores. With hyper-threading this can even go as high as 48 or 64 virtual
> cpus. People who buy such hardware might get very disappointed finding out
> that the FreeBSD is not going to use such hardware to its full potential.
>
> Does anybody object if I'd bump MAXCPU to 32, which is still low but might
> me more reasonable default these days, or at least make it an kernel
> configuration option documented in the NOTES?

Please correct me, if I'm about smth. different, but isn't it already?

/sys/amd64/include/param.h:#define MAXCPU               32
/sys/arm/include/param.h:#define        MAXCPU          2
/sys/i386/include/param.h:#define MAXCPU                32
/sys/ia64/include/param.h:#define       MAXCPU          32
/sys/mips/include/param.h:#define       MAXCPU          MAXSMPCPU
/sys/powerpc/include/param.h:#define    MAXCPU          2
/sys/sparc64/include/param.h:#define MAXCPU             16
/sys/sun4v/include/param.h:#define MAXCPU               32

(almost 2y ago for x86)

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