Date: Sat, 24 May 2014 03:42:31 +0100 From: Tim Bishop <tim-lists@bishnet.net> To: Alan Somers <asomers@freebsd.org> Cc: FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: Re: Processor cores not properly detected/activated? Message-ID: <20140524024231.GG13462@carrick-users.bishnet.net> In-Reply-To: <CAOtMX2gyeLYs4nAKOa-u=PQ63TakreG0CW_Fc%2BRrdDv8NtZ3XQ@mail.gmail.com> References: <20140524014713.GF13462@carrick-users.bishnet.net> <CAOtMX2gyeLYs4nAKOa-u=PQ63TakreG0CW_Fc%2BRrdDv8NtZ3XQ@mail.gmail.com>
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On Fri, May 23, 2014 at 08:07:03PM -0600, Alan Somers wrote: > On Fri, May 23, 2014 at 7:47 PM, Tim Bishop <tim-lists@bishnet.net> wrote: > > I have a new quad CPU system containing four of these processors: > > > > Intel(R) Xeon(R) CPU E7-4830 v2 @ 2.20GHz (2200.05-MHz K8-class CPU) > > > > I've tried FreeBSD 10.0, stable/10 and head, but all of them only detect > > a maximum of 64 "CPUs". There should be 80. Here's the relevant dmesg > > output (full output attached): > > > > FreeBSD/SMP: Multiprocessor System Detected: 64 CPUs > > FreeBSD/SMP: 3 package(s) x 10 core(s) x 2 SMT threads > > ... > > Try setting MAXCPU higher. It's defined by default to 64 in, > sys/amd64/include/param.h Ah! Thank you, yes, that fixed it: FreeBSD/SMP: Multiprocessor System Detected: 80 CPUs FreeBSD/SMP: 4 package(s) x 10 core(s) x 2 SMT threads Given the number of "CPUs" in some top end processors (up to 30 per socket), a limit of 64 is starting to seem low. Is it worth doubling it to 128? Or even higher? It'd be nice to be able to use a stock kernel with freebsd-update at least. Anyway, thanks for your help Alan, at least my system is working fully now :-) Tim. -- Tim Bishop http://www.bishnet.net/tim/ PGP Key: 0x6C226B37FDF38D55
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