Date: Fri, 27 May 2005 11:23:04 -0700 From: Julian Elischer <julian@elischer.org> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-smp@freebsd.org, "Singh, Vijay" <Vijay.Singh@netapp.com> Subject: Re: SMP with HTT disabled Message-ID: <42976588.8030807@elischer.org> In-Reply-To: <200505271049.06850.jhb@FreeBSD.org> References: <637A278D8D0DBC438EA5E75C6E1818B9044107CB@magenta.hq.netapp.com> <200505271049.06850.jhb@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
John Baldwin wrote: >On Thursday 26 May 2005 05:04 pm, Singh, Vijay wrote: > > >>Hello, I am trying to disable HTT to run some tests. From dmesg I have: >> >>CPU: Intel(R) Xeon(TM) CPU 2.66GHz (2666.77-MHz 686-class CPU) >> Origin = "GenuineIntel" Id = 0xf29 Stepping = 9 >> >>Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE >>,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,S >>SE2,SS,HTT,TM,PBE> >> Hyperthreading: 2 logical CPUs >>real memory = 1073676288 (1023 MB) >>avail memory = 1041121280 (992 MB) >>ACPI APIC Table: <A M I OEMAPIC > >>FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs >> cpu0 (BSP): APIC ID: 0 >> cpu1 (AP): APIC ID: 1 >> >># cat /boot/loader.conf >>machdep.hlt_logical_cpus=1 >> >>And mptable output is below. It seems to me that the kernel does not >>bring up the 2nd physical CPU. Am I right or wrong. >> >> > >The kernel only sees 1 physical CPU. The MPTable only shows 1 physical CPU as >well: > > note that mptable shows both HTT cpus on some motherboards and only one entry per chip on others. >>MP Config Base Table Entries: >> >>-- >> >>Processors: APIC ID Version State Family Model Step Flags >> >>0 0x14 BSP, usable 15 2 9 0xbfebfbff >> >>-- >> >> > > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?42976588.8030807>