Bogomips mini-Howto - Directory UMM

BogoMips mini−Howto
Table of Contents
1. Introduction.....................................................................................................................................................1
2. The highest and lowest BogoMips ratings....................................................................................................2
2.1. The highest single−CPU Linux boot sequence BogoMips value.....................................................2
2.2. The lowest Linux boot sequence BogoMips value...........................................................................2
2.3. The highest multiple−CPU Linux boot sequence BogoMips value.................................................2
2.4. The highest non−Linux BogoMips value.........................................................................................2
3. The frequently asked questions about BogoMips........................................................................................3
3.1. What are BogoMips..........................................................................................................................3
3.2. How to estimate what the proper BogoMips rating should be..........................................................4
3.3. How to determine what the current BogoMips rating is...................................................................5
3.4. Variations in BogoMips rating.........................................................................................................5
3.5. New BogoMips algorithm?...............................................................................................................6
3.6. BogoMips ... failed...........................................................................................................................6
3.7. What about clone CPUs (Cyrix, NexGen, AMD, etc)......................................................................6
3.8. Why to pay attention to BogoMips...................................................................................................7
4. Compilation of ratings....................................................................................................................................8
4.1. 386 systems: SX, DX, Nexgen.........................................................................................................8
4.2. Oddly or faultily configured 386 systems.........................................................................................9
4.3. 486 systems.....................................................................................................................................10
4.4. Oddly or faultily configured 486 systems.......................................................................................13
4.5. 486 variations: Cyrix/IBM, UMC, Intel Overdrive........................................................................14
4.6. Pentium systems.............................................................................................................................15
4.7. Oddly or faultily configured Pentium systems...............................................................................17
4.8. Pentium variations: Intel (MMX, Pro, II, Celeron, III, 4)..............................................................18
4.9. Pentium variations: Cyrix, AMD (K5/K6/K7, Duron, Athlon, Opteron), Centaur........................22
4.10. Alpha systems...............................................................................................................................28
4.11. Motorola systems..........................................................................................................................29
4.12. Sparc systems................................................................................................................................30
4.13. PowerPC systems..........................................................................................................................31
4.14. Other CPU systems: Mips, Intel 8088/286 ELKS, IBM, Transmeta Crusoe, PA−RISC,
Hitachi SH, Arm and StrongArm, iDragon, Vax, CRIS Etrax, XScale................................................32
4.15. Multi−CPU systems (SMP2, SMP4, others)................................................................................33
4.16. Non−Linux systems (reference only)...........................................................................................36
5. Signature........................................................................................................................................................39
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