On May 21, 2007, at 10:30 AM, drew einhorn wrote: > Thanks, Is there a guide somewhere on how to read the cpu info. Not that I know of, but there's always the source: * http://lxr.linux.no/ident?i=cpuinfo_op * http://lxr.linux.no/source/arch/i386/kernel/cpu/proc.c#L11 * http://lxr.linux.no/source/include/asm-i386/cpufeature.h In particular, "lm" (a.k.a. X86_FEATURE_LM) appears to indicate 64- bit support. > I do remember seeing stuff about hyperthreading on this box. > Does hyperthreading imply 64 bit. No. > Here's the cpu from another box that has hyperthreading, but I > was assuming it was not 64 bit. Can I run a 64-bit kernel on this > one? > processor : 0 > vendor_id : GenuineIntel > cpu family : 15 > model : 2 > model name : Intel(R) Pentium(R) 4 CPU 3.40GHz > stepping : 5 > cpu MHz : 3392.058 > cache size : 2048 KB > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 2 > 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 up No. It doesn't have "lm", so it must not support 64-bit. -- Scott Lamb <http://www.slamb.org/>