Date: Wed, 28 May 2014 12:11:30 +0800 From: Jia-Shiun Li <jiashiun@gmail.com> To: Tim Bishop <tim-lists@bishnet.net> Cc: FreeBSD CURRENT <freebsd-current@freebsd.org>, Alan Somers <asomers@freebsd.org> Subject: Re: Processor cores not properly detected/activated? Message-ID: <CAHNYxxPAqrRcJyxY8ZDnL87FdRAUxBL522nAAEQpA19uByYE2w@mail.gmail.com> In-Reply-To: <20140524103835.GI13462@carrick-users.bishnet.net> References: <20140524014713.GF13462@carrick-users.bishnet.net> <CAOtMX2gyeLYs4nAKOa-u=PQ63TakreG0CW_Fc%2BRrdDv8NtZ3XQ@mail.gmail.com> <20140524024231.GG13462@carrick-users.bishnet.net> <CAOtMX2hnQNhb%2BaGPogTMwxnVVKuuz3Buq1Cb3xBPYW7p7M8=Tw@mail.gmail.com> <20140524103835.GI13462@carrick-users.bishnet.net>
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On Sat, May 24, 2014 at 6:38 PM, Tim Bishop <tim-lists@bishnet.net> wrote: > On Fri, May 23, 2014 at 09:03:12PM -0600, Alan Somers wrote: >> Yeah, I think so. It seems like a GENERIC kernel ought to be able to >> handle the biggest commonly available quad socket systems. Anything >> with more than 4 sockets, though, is probably too exotic to deserve >> such special treatment. > > I submitted a PR to that effect: > > http://www.freebsd.org/cgi/query-pr.cgi?pr=190169 > > Thanks again for your help. > > Tim. > Hi, I read in the follow-up of the PR that current hard limit is 256. Currently available systems* can already push usage up to 240. IVB-EX aka Xeon E7v2 supports 8-socket * 15-core * 2-thread. Expect something to break 256 in less than a year I think. X2APIC support will be required then. In theory it is already possible to build larger systems with custom glue logic, but I am not aware of any. *: E.g. IBM System x3950 X6 -Jia-Shiun.
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