As someone else mentioned, my guess would be it's turned off on the board. If there's no bios setting, how about a jumper on the board? There has to be some way to turn it on/off.
-----Original Message----- From: A. Khattri [mailto:[EMAIL PROTECTED] Sent: Sun 9/25/2005 1:36 AM To: [email protected] Cc: Subject: Re: [gentoo-server] HT on P4? On Fri, 23 Sep 2005, Joao Patricio wrote: > Did you enable SMP when you compiled your kernel? Both SMP and SMT are enabled in this kernel: # grep SMP /usr/src/linux/.config # CONFIG_X86_BIGSMP is not set CONFIG_SMP=y CONFIG_X86_FIND_SMP_CONFIG=y CONFIG_X86_SMP=y # grep SMT /usr/src/linux/.config CONFIG_SCHED_SMT=y > > Em Sexta, 23 de Setembro de 2005 23:05, o A. Khattri escreveu: > > On Fri, 23 Sep 2005, kashani wrote: > > > A. Khattri wrote: > > > > I switched on SMP and HT when building my kernel but I see this among > > > > the boot messages: > > > > > > > > CPU: After generic identify, caps: bfebfbff 00000000 00000000 00000000 > > > > 0000441d 00000000 00000000 > > > > CPU: After vendor identify, caps: bfebfbff 00000000 00000000 00000000 > > > > 0000441d 00000000 00000000 > > > > monitor/mwait feature present. > > > > using mwait in idle threads. > > > > CPU: Trace cache: 12K uops, L1 D cache: 16K > > > > CPU: L2 cache: 1024K > > > > CPU: Hyper-Threading is disabled > > > > > > Is it possible it's disabled in the Bios? Some servers shipped that way > > > when they first came out IIRC. > > > > I didn't find any BIOS setting unfortunately... > > > > This is a Supermicro 5013C-T server with a P4 (P4SCE?) board in it. > > > > # cat /proc/cpuinfo > > processor : 0 > > vendor_id : GenuineIntel > > cpu family : 15 > > model : 4 > > model name : Intel(R) Pentium(R) 4 CPU 2.40GHz > > stepping : 1 > > cpu MHz : 2395.003 > > cache size : 1024 KB > > fdiv_bug : no > > hlt_bug : no > > f00f_bug : no > > coma_bug : no > > fpu : yes > > fpu_exception : yes > > cpuid level : 5 > > wp : yes > > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca > > cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pni monitor > > ds_cpl cid xtpr > > bogomips : 4718.59 > > > > > > -- > -- wheel of reincarnation [coined in a paper by T. H. Myer and I.E. Sutherland "On the Design of Display Processors", Comm. ACM, Vol. 11, no. 6, June 1968)] Term used to refer to a well-known effect whereby function in a computing system family is migrated out to special-purpose peripheral hardware for speed, then the peripheral evolves toward more computing power as it does its job, then somebody notices that it is inefficient to support two asymmetrical processors in the architecture and folds the function back into the main CPU, at which point the cycle begins again. Several iterations of this cycle have been observed in graphics-processor design, and at least one or two in communications and floating-point processors. Also known as `the Wheel of Life', `the Wheel of Samsara', and other variations of the basic Hindu/Buddhist theological idea. See also blitter, bit bang. -- [email protected] mailing list
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