Module core.cpuid

References

Some of this information was extremely difficult to track down. Some of the documents below were found only in cached versions stored by search engines! This code relies on information found in:

• "Intel(R) 64 and IA-32 Architectures Software Developers Manual, Volume 2A: Instruction Set Reference, A-M" (2007).
• "AMD CPUID Specification", Advanced Micro Devices, Rev 2.28 (2008).
• "AMD Processor Recognition Application Note For Processors Prior to AMD Family 0Fh Processors", Advanced Micro Devices, Rev 3.13 (2005).
• "AMD Geode(TM) GX Processors Data Book", Advanced Micro Devices, Publication ID 31505E, (2005).
• "AMD K6 Processor Code Optimisation", Advanced Micro Devices, Rev D (2000).
• "Application note 106: Software Customization for the 6x86 Family", Cyrix Corporation, Rev 1.5 (1998)
• http://www.datasheetcatalog.org/datasheet/nationalsemiconductor/GX1.pdf
• "Geode(TM) GX1 Processor Series Low Power Integrated X86 Solution", National Semiconductor, (2002)
• "The VIA Isaiah Architecture", G. Glenn Henry, Centaur Technology, Inc (2008).
• http://www.sandpile.org/ia32/cpuid.htm
• http://www.akkadia.org/drepper/cpumemory.pdf
• "What every programmer should know about memory", Ulrich Depper, Red Hat, Inc., (2007).
• "CPU Identification by the Windows Kernel", G. Chappell (2009). http://www.geoffchappell.com/viewer.htm?doc=studies/windows/km/cpu/cx8.htm
• "Intel(R) Processor Identification and the CPUID Instruction, Application Note 485" (2009).

Bugs

Currently only works on x86 and Itanium CPUs. Many processors have bugs in their microcode for the CPUID instruction, so sometimes the cache information may be incorrect.