Date: Mon, 7 Nov 2005 11:44:36 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-smp@freebsd.org Subject: Re: Multi CPU support in 6.0 Message-ID: <200511071144.36915.jhb@freebsd.org> In-Reply-To: <10EFEEF4-D1D4-45FC-991C-60A4E60FB391@bnc.net> References: <01d301c5e3ae$b2461840$b3db87d4@multiplay.co.uk> <20051107152718.GA4743@tara.freenix.org> <10EFEEF4-D1D4-45FC-991C-60A4E60FB391@bnc.net>
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On Monday 07 November 2005 11:15 am, Achim Patzner wrote: > Am 07.11.2005 um 16:27 schrieb Ollivier Robert: > > According to Steven Hartland: > >> I believe previously smp support in FreeBSD has been limited > >> to smaller numbers of CPU's, we've got the opportunity to test > >> an 8 way dual core ( 16 cpu's ) this week, is 6.0 up to this? > > > > I recall seeing someone on IRC saying they had a 14 CPU machine > > (Sparc64 > > E4500) to play with so I think it should be ok. > > I remember someone writing that the intermediate state of -CURRENT > while removing the giant lock around the kernel wasn't viable with > more than four CPUs as it would completely deadlock from time to > time. I guess we're a bit further down the road... That might still be the case but it doesn't seem to have triggered on the 14-CPU sparc. FreeBSD/i386 and FreeBSD/amd64 both support up to 16 CPUs (counting hyperthreads, so a 4-package box with dual cores that each have 2 hyperthreads should recognize all 16 cpus). -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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