Date: Thu, 12 Feb 2009 08:29:19 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-smp@freebsd.org Cc: James Chang <james.technew@gmail.com> Subject: Re: FreeBSD could use how many cpu(x86) max? Message-ID: <200902120829.19312.jhb@freebsd.org> In-Reply-To: <a951c2910902120007t55d8b513qae2adf0e4380cc2f@mail.gmail.com> References: <a951c2910902120007t55d8b513qae2adf0e4380cc2f@mail.gmail.com>
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On Thursday 12 February 2009 3:07:30 am James Chang wrote: > Dear all, > > Does any ever try FreeBSD on box that has more than 16 CPU? > > I got an HP ProLiant DL 785 G5 with 32 core (Quad-Core AMD Opteron(tm) > Processor 8356 (2300.10-MHz K8-class CPU) and 256G memory. > When I boot this machine, it could detect 32 core, but only use 16 core!? > > What should do to get FreeBSD 7.1 work with 32 core? > Or, FreeBSD 7.1 only 16 Core Max ? Out of the box FreeBSD only supports 16 CPUs. You can increase that to 32 by changing MAX_CPU in sys/(amd64|i386)/include/param.h and rebuilding. On amd64 you can actually bump it up to 64 if desired. I don't make any promises as to how well the system will perform with that many CPUs enabled though. -- John Baldwin
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