Look at the flags. The lm flag means 64-bit for both the AMD and the Intel chips. In addition, the model name will tell you the type of processor as well as the CPU family. Here is one for an Opteron and an Itanium. You'll see that in the x86_64 chips you will have the longmode flag (lm) where you won't in an Itanium. From Software, 'uname -p' will give you the processor. processor : 0 vendor_id : AuthenticAMD cpu family : 16 model : 2 model name : Quad-Core AMD Opteron(tm) Processor 2352 stepping : 3 cpu MHz : 2100.000 cache size : 512 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow constant_tsc pni monitor cx16 lahf_lm cmp_legacy svm cr8_legacy bogomips : 5256.88 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc [6] [7] [8] processor : 0 vendor : GenuineIntel arch : IA-64 family : Itanium 2 model : 2 revision : 2 archrev : 0 features : branchlong cpu number : 0 cpu regs : 4 cpu MHz : 1600.017400 itc MHz : 1600.017400 BogoMIPS : 2390.75 -- Jerry Feldman <Jerry.Feldman@xxxxxxxxxxxxxxxx> Algorithmics (US), Inc Suite 2-400 275 Grove St. Newton, MA 02466 617-663-5220 617-663-5391 (fax) > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list- > bounces@xxxxxxxxxx] On Behalf Of Vivek Mangal > Sent: Sunday, August 10, 2008 11:49 PM > To: Red Hat > Subject: Re: cpu architecture > > Thanks for reply > but Jai Rangi ji > How you can say it 64 bits ? > and how i detect that it is a x86_64 bit ? > Please tell me... > > > On Sat, Aug 9, 2008 at 11:36 AM, Vivek Mangal > <vivek.mangal9685@xxxxxxxxx>wrote: > > > Thanks for reply > > the output of unamr -a is > > Linux mangal.example.com 2.6.23.1-42.fc8 #1 SMP Tue Oct 30 13:18:33 EDT > > 2007 x86_64 x86_64 x86_64 GNU/Linux > > and the /proc/cpuinfo file is > > ***************************** > > processor : 0 > > vendor_id : GenuineIntel > > cpu family : 6 > > model : 15 > > model name : Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz > > stepping : 13 > > cpu MHz : 2001.000 > > cache size : 2048 KB > > physical id : 0 > > siblings : 2 > > core id : 0 > > cpu cores : 2 > > fpu : yes > > fpu_exception : yes > > cpuid level : 10 > > 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 syscall > nx lm > > constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est > tm2 > > ssse3 cx16 xtpr lahf_lm ida > > bogomips : 3993.31 > > clflush size : 64 > > cache_alignment : 64 > > address sizes : 36 bits physical, 48 bits virtual > > power management: > > > > processor : 1 > > vendor_id : GenuineIntel > > cpu family : 6 > > model : 15 > > model name : Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz > > stepping : 13 > > cpu MHz : 2001.000 > > cache size : 2048 KB > > physical id : 0 > > siblings : 2 > > core id : 1 > > cpu cores : 2 > > fpu : yes > > fpu_exception : yes > > cpuid level : 10 > > 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 syscall > nx lm > > constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est > tm2 > > ssse3 cx16 xtpr lahf_lm ida > > bogomips : 3989.79 > > clflush size : 64 > > cache_alignment : 64 > > address sizes : 36 bits physical, 48 bits virtual > > power management: > > ******************* > > And by seeing lm flags how i will get cpu arch ? > > Please explane it... > > > > > > > > On Wed, Aug 6, 2008 at 10:02 AM, Vivek Mangal > <vivek.mangal9685@xxxxxxxxx>wrote: > > > >> Hello All, > >> I was configuring VMWare on Fedora 8 x86_64 > >> but when i create a virtual machine then it gives me a error that your > cpu > >> is not a x86_64 arch. > >> i tried to check it in /proc/cpuinfo file > >> but nothing found > >> can any one tell me how i check my processor arch or cpu arch. > >> > >> -- > >> With Regards, > >> Vivek Mangal > >> Project Assistant > >> IC Design Group > >> CEERI, Pilani > >> Call +91-9829681753 > >> > >> > > > > > > -- > > With Regards, > > Vivek Mangal > > Project Assistant > > IC Design Group > > CEERI, Pilani > > Call +91-9829681753 > > > > > > > -- > With Regards, > Vivek Mangal > Project Assistant > IC Design Group > CEERI, Pilani > Call +91-9829681753 > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list -------------------------------------------------------------------------- This email and any files transmitted with it are confidential and proprietary to Algorithmics Incorporated and its affiliates ("Algorithmics"). 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