Date: Wed, 1 Dec 2004 16:25:58 -0800 (PST) From: Doug White <dwhite@gumbysoft.com> To: Joseph Koshy <joseph.koshy@gmail.com> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: Dual CPU detection problem Message-ID: <20041201162501.H71481@carver.gumbysoft.com> In-Reply-To: <84dead720411300329249d4bf3@mail.gmail.com> References: <84dead720411300329249d4bf3@mail.gmail.com>
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On Tue, 30 Nov 2004, Joseph Koshy wrote: > Strange problem. > > On an IBM xSeries 335 machine with TWO P4 HTT cpus (mptable, dmesg output > enclosed) FreeBSD -CURRENT will sometimes detect both the physical CPUs > and will sometimes detect only one. > > FreeBSD 5.3 reliably detects the 2 physical / 4 logical CPUs that are present. > > Any suggestions on how to debug this? dmesg + mptable + acpidump output in both situations would be a good start. Sounds like one of the physical CPUs might be flakey; you see 2 CPUs since you see the solitary core's hyperthreaded pair. -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org
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