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On Wednesday 05 March 2008, Chris Brennan wrote: |
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> Here is the output of my cpuinfo, I'll point out where it will mean |
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> 64bit. For the sake of this demonstration, I have only pasted one |
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> (1) CPU. |
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> |
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> xaero@Leviathan ~ $ cat /proc/cpuinfo |
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> processor : 0 |
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> vendor_id : AuthenticAMD |
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> cpu family : 15 |
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> model : 75 |
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> model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ <-- |
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> Here will be your first indication. 64 bit processors, weather they |
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> are SPARC, AMD or intel, must identify themselves clearly in the |
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> model name field. |
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> stepping : 2 |
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> cpu MHz : 1000.000 <-- forgive this, my cpu's are idle at the |
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> moment and speedstep droped me down for the moment. |
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> cache size : 512 KB |
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> physical id : 0 |
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> siblings : 2 |
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> core id : 0 |
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> cpu cores : 2 <-- If you are a multi-core CPU, this will tell you |
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> how many cores per processor. All cores are identical, so if you |
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> have a 64-bit Dual/Quad-Core CPU, then all cores are 64bit. |
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> fpu : yes |
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> fpu_exception : yes |
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> cpuid level : 1 |
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> wp : yes |
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> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca |
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> cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext |
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> fxsr_opt rdtscp lm 3dnowext 3dnow rep_good pni cx16 lahf_lm |
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> cmp_legacy svm extapic cr8_legacy <-- you can look for flags that |
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> may give away 64bit, such as lahf_lm, lm and nx. |
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> bogomips : 2010.67 |
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> TLB size : 1024 4K pages |
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> clflush size : 64 |
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> cache_alignment : 64 |
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> address sizes : 40 bits physical, 48 bits virtual |
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> power management: ts fid vid ttp tm stc |
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|
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I am a bit confused now. I always thought my CPU was 32bit. Here are |
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the relevant two lines from my /proc/cpuinfo: |
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|
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model name : Intel(R) Pentium(R) 4 CPU 3.00GHz |
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flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge |
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mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx |
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lm constant_tsc pebs bts sync_rdtsc pni monitor ds_cpl cid cx16 xtpr |
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lahf_lm |
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|
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So the model name does not indicate anything 64bit while the flags |
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contain lm, nx and lahf_lm. |
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|
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What gives? |
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|
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Uwe |
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|
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-- |
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Informal Linux Group Namibia: |
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http://www.linux.org.na/ |
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SysEx (Pty) Ltd.: |
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http://www.SysEx.com.na/ |
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-- |
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