Re: FreeBSD Foundation and iXsystems Collaborate to Further the Cause of High Performance Computing on FreeBSD

For some more insight, Dillon explained it here a few years ago:
http://leaf.dragonflybsd.org/mailarchive/users/2010-12/msg00079.html
//Jonas

--
Jonas


2014-02-09 21:26 GMT+01:00 John Marino <[email protected]>:

> On 2/9/2014 21:17, Justin Sherrill wrote:
> > You are the second person to mention this that I've heard in the last
> > few days.  I remember that there was some arbitrary limit on processor
> > count in DragonFly - 63, I think.  I don't know how much of an obstacle
> > that actually is.
> >
>
> It's not arbitrary.
> It's 2^6-1 -- IIUC there are only 6 bits available on some key location
> although I am missing some information to explain why the limit isn't 64.
>
> Anyway, apparently it will take some significant rework to increase the
> max CPU count, but I'll leave that for Matt to explain.
>
> John
>