Difference between pages "CPU" and "Dmidecode"

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imported>ThorstenStaerk
 
imported>ThorstenStaerk
(Created page with "<tt>'''dmidecode'''</tt> is a command for displaying BIOS hardware information. When working remotely with several computers, you sometimes want to verify that you are on th...")
 
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'''CPU''' ('''C'''entral '''P'''rocessing '''U'''nit)s consist of logic circuitry that interprets and executes the [[software]] instructions that drive a computer. For more information, see http://en.wikipedia.org/wiki/Cpu
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<tt>'''dmidecode'''</tt> is a [[command]] for displaying BIOS hardware information.
  
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= What CPUs do I have? =
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When working remotely with several computers, you sometimes want to verify that you are on the right iron. For that, the program dmidecode exists - just start it by typing <tt>dmidecode</tt>.
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To find out what CPUs you have at what speed, [[open a console]] and call [[hwinfo]], e.g.:
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You get all information about the computer that the vendor put into the BIOS. There are different paragraphs ("handles"), for example like that:
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$ hwinfo --cpu
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    Handle 0x0100
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01: None 00.0: 10103 CPU
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          DMI type 1, 25 bytes.
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  [Created at cpu.301]
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          System Information
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  Unique ID: rdCR.j8NaKXDZtZ6
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                  Manufacturer: Dell Computer Corporation
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  Hardware Class: cpu
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                  Product Name: Dimension 4600i
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  Arch: X86-64
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                  Version: Not Specified
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  Vendor: "GenuineIntel"
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                  Serial Number: 664S31J
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  '''Model: 6.15.11 "Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz"'''
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                  UUID: 44454C4C-3600-1034-8053-B6C04F33314A
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  Features: 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
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                  Wake-up Type: APM Timer
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  '''Clock: 1600 MHz'''
 
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  BogoMips: 4791.54
 
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  Cache: 4096 kb
 
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  '''Units/Processor: 4'''
 
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  Config Status: cfg=new, avail=yes, need=no, active=unknown
 
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The block in this example is repeated 4 times because there this is a quad-core processor (Units/Processor: 4). The "clock" value is different because this is a 2.40GHz processor, running at 1600 MHz.
 
  
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To reduce complexity:
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[[Category:Command]]
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$ hwinfo --cpu --short
 
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cpu:
 
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                        Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz, 1600MHz
 
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                        Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz, 1600MHz
 
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                        Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz, 1600MHz
 
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                        Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz, 1600MHz
 
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tells me I have a quad-core processor and 4 processor cores, so one processor with 4 cores, 2.4GHz ones running at 1600MHz.
 
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= Load average =
 
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'''load average''' is a measure to tell how busy the [[CPU]] is. load average shows the average number of [[process]]es waiting for [http://en.wikipedia.org/wiki/Execution execution]. Usually there are three numbers presented where the first show average last minute, second average for last five minutes and the third show average load for the last fifteen minutes.
 
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Show your computer's [http://en.wikipedia.org/wiki/Load_average load average] with the [[command]]s uptime or [[top]].
 
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= See also =
 
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* [[hardware]]
 
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* [[top]] - what does your CPU do
 
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* [[diagnostics]] - what is your hardware and what does it do
 
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[[Category:Hardware]]
 

Revision as of 01:51, 23 January 2012

dmidecode is a command for displaying BIOS hardware information.

When working remotely with several computers, you sometimes want to verify that you are on the right iron. For that, the program dmidecode exists - just start it by typing dmidecode. You get all information about the computer that the vendor put into the BIOS. There are different paragraphs ("handles"), for example like that: 

    Handle 0x0100
          DMI type 1, 25 bytes.
          System Information
                 Manufacturer: Dell Computer Corporation
                 Product Name: Dimension 4600i
                 Version: Not Specified
                 Serial Number: 664S31J
                 UUID: 44454C4C-3600-1034-8053-B6C04F33314A
                 Wake-up Type: APM Timer
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