Date: Sun, 22 Mar 2015 09:50:43 -0600 From: Ian Lepore <ian@freebsd.org> To: Sven Brehmer <sven.brehmer@polycoresoftware.com> Cc: freebsd-arm@freebsd.org Subject: Re: Booting < 4 SMP cores on Wandboard-Quad? Message-ID: <1427039443.49126.2.camel@freebsd.org> In-Reply-To: <000001d0642f$56f59540$04e0bfc0$@polycoresoftware.com> References: <000001d0642f$56f59540$04e0bfc0$@polycoresoftware.com>
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On Sat, 2015-03-21 at 16:32 -0700, Sven Brehmer wrote: > Hello, > > > > We are working with FreeBSD on the Wandboard and we are trying to boot less > than 4 cores in SMP mode. We have tried a number of way's with settings in > sysctl.conf, loader.conf and customizing the kernel build with "options > MAXCPU=2", but without success. > > > > Any advice would be appreciated. Set the hw.ncpu tunable to the number you want. If you have forth enabled add to loader.conf: hw.ncpu=2 otherwise (no forth) add to loader.rc: set hw.ncpu=2 I'm not sure there's good error checking, so don't set it to more cores than you actually have. :) -- Ian
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