Date: Fri, 24 Feb 2006 17:20:41 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Subject: Re: CFT: src/tools/tools/npcus Message-ID: <200602241720.42863.jhb@freebsd.org> In-Reply-To: <43FF79A0.8040809@errno.com> References: <43FF79A0.8040809@errno.com>
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On Friday 24 February 2006 16:24, Sam Leffler wrote: > I need folks to test some code committed recently for identifying the > number of cpu's on a machine. The plan is to use this code to choose an > SMP or UP kernel during an install. > > cd /usr/src/tools/tools/ncpus > make > su > ./ncpus > > You should get output like this: > > trouble# ./ncpus > acpi0_check: nexus0 attached > acpi0_check: legacy0 not-present > acpi0_check: npx0 attached > acpi0_check: acpi0 attached > ncpus: MADT: Found CPU APIC ID 1 enabled > ncpus: MADT: Found CPU APIC ID 2 disabled > acpi: 1 > ncpus: MPTable: Found CPU APIC ID 0 enabled > mptable: 1 > > acpi: 1 means checking ACPI configuration info we found 1 cpu. mptable: > 1 means MPTable indicated there was 1 cpu. The rest of the stuff > printed out is for debugging. > > If you run this test and DON'T see the correct number of cpus for your > machine please mail me (directly) with the output and dmesg output from > booting your kernel. FWIW acpi info is considered more definitive than > MPTable so if acpi gives you the right answer but MPTable does not > that's ok. Specifically, MPTable is likely (except on a few early Xeon's with HTT) to not include enabled HTT CPUs in its count. The ACPI count should reflect any HTT CPUs if and only if HTT is enabled in the BIOS. -- 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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