Editing BogoMips (section)

== Proper BogoMips ratings ==
As a very approximate guide, the BogoMips can be pre-calculated by the following table. The given rating is typical for that [[Central processing unit|CPU]] with the then current and applicable [[Linux]] version. The index is the ratio of "BogoMips per clock speed" for any CPU to the same for an Intel 386DX CPU, for comparison purposes.<ref>{{cite web|last=Bekman|first=Stas|title=What is a BogoMip?|url=http://stason.org/TULARC/os/linux-faq/019-What-is-a-BogoMip.html}}</ref><ref name="BogoMips HOWTO">{{cite web|url=http://tldp.org/HOWTO/BogoMips/bogo-list.html|title=BogoMips mini-Howto}}</ref>

{| class="sortable wikitable"
!System!!Rating!!Index
|-
|[[Intel 8088]] ||clock × 0.004||0.02
|-
|[[Intel 80386|Intel/AMD 386SX]] ||clock × 0.14||0.8
|-
|[[Intel 80386|Intel/AMD 386DX]] ||clock × 0.18||1 (definition)
|-
|[[Motorola 68030]]||clock × 0.25||1.4
|-
|[[Cyrix]]/[[IBM]] 486||clock × 0.34||1.8
|-
|Intel [[Intel P5|Pentium]]||clock × 0.40||2.2
|-
|[[Intel 80486|Intel 486]] ||clock × 0.50||2.8
|-
|[[AMD 5x86]]||clock × 0.50||2.8
|-
|[[MIPS Technologies|MIPS]] R4000/R4400||clock × 0.50||2.8
|-
|[[ARM9]]||clock × 0.50||2.8
|-
|[[Motorola 68040]]||clock × 0.67||3.7
|-
|[[PowerPC]] 603||clock × 0.67||3.7
|-
|Intel [[StrongARM]]||clock × 0.66||3.7
|-
|[[NexGen]] Nx586||clock × 0.75||4.2
|-
|[[PowerPC]] 601||clock × 0.84||4.7
|-
|[[Alpha 21064]]/21064A||clock × 0.99||5.5
|-
|[[Alpha 21064|Alpha 21066]]/21066A||clock × 0.99||5.5
|-
|[[Alpha 21164]]/21164A||clock × 0.99||5.5
|-
|Intel [[Pentium Pro]]||clock × 0.99||5.5
|-
|[[Cyrix Cx5x86|Cyrix 5x86]]/[[Cyrix 6x86|6x86]] ||clock × 1.00||5.6
|-
|Intel [[Pentium II]]/[[Pentium III|III]]||clock × 1.00||5.6
|-
|[[Athlon|AMD K7/Athlon]]||clock × 1.00||5.6
|-
|Intel [[Celeron]]||clock × 1.00||5.6
|-
|Intel [[Itanium]]||clock × 1.00||5.6
|-
|[[R4600]]||clock × 1.00||5.6
|-
|[[Hitachi, Ltd.|Hitachi]] SH-4||clock × 1.00||5.6
|-
|[[Raspberry Pi|Raspberry Pi (Model B)]]||clock × 1.00||5.6
|-
|Intel [[Itanium 2]]||clock × 1.49||8.3
|-
|[[Alpha 21264]]||clock × 1.99||11.1
|-
|[[VIA Technologies|VIA Centaur]]||clock × 1.99||11.1
|-
|[[AMD K6|AMD K5/K6/K6-2/K6-III]]||clock × 2.00||11.1
|-
|AMD [[Duron]]/[[Athlon]] XP||clock × 2.00||11.1
|-
|AMD [[Sempron]]||clock × 2.00||11.1
|-
|[[SPARC|UltraSparc]] II||clock × 2.00||11.1
|-
|Intel [[Pentium MMX]]||clock × 2.00||11.1
|-
|Intel [[Pentium 4]]||clock × 2.00||11.1
|-
|Intel [[Pentium M]]||clock × 2.00||11.1
|-
|Intel [[Core Duo]]||clock × 2.00||11.1
|-
|Intel [[Core 2 Duo]]||clock × 2.00||11.1
|-
|Intel [[Intel Atom|Atom]] N455||clock × 2.00||11.1
|-
|Centaur C6-2||clock × 2.00||11.1
|-
|[[PowerPC]] 604/604e/750||clock × 2.00||11.1
|-
|Intel [[Pentium III#Coppermine|Pentium III Coppermine]]||clock × 2.00||11.1
|-
|Intel [[Xeon#Pentium III Xeon|Pentium III Xeon]]||clock × 2.00||11.1
|-
|[[Motorola 68060]]||clock × 2.00||11.1
|-
|Intel [[Xeon#Xeon .28DP.29 .26 Xeon MP .2832-bit.29|Xeon MP (32-bit)]] ([[hyper-threading]])||clock × 3.97||22.1
|-
|Rockchip 3588||||48.0
|}

With the 2.2.14 Linux kernel, a [[CPU cache|caching]] setting of the CPU state was moved from behind to before the BogoMips calculation. Although the BogoMips algorithm itself wasn't changed, from that kernel onward the BogoMips rating for then current Pentium CPUs was twice that of the rating before the change. The changed BogoMips outcome had no effect on real processor performance.{{Citation needed|reason=Performance claim with no evidence|date=January 2020}}

In a shell, BogoMips can be easily obtained by searching the [[Procfs#cpuinfo|cpuinfo]] file:<ref name="BogoMips HOWTO"/>
<syntaxhighlight lang="console">
$ grep -i bogomips /proc/cpuinfo
</syntaxhighlight>