NAME

	cpuid – x86 cpuid instriction

SYNOPSIS

	cpuid [ mach ] [–efisvt] [–n fn]

DESCRIPTION

Cpuid prints out information gleaned from the Intel CPUID instruction. A function number may be specified with the –n flag. Alternatively, a few known functions are available –e     decode extended feature information from function 0x80000001. –f     decode feature information from function 1. –i     print the informational brand string gathered from functions 0x80000002–6. –s     print the processor signature returned in AX from function 0x01 in raw form and also as family.model.stepping. –v     print the manufacturer's identification string returnd by function 0x00. –t     Intel only? print the X2APIC processor topology. EXAMPLE chula; aux/cpuid –t thread      00000001 00000002 00000100 00000000 core        00000004 00000008 00000201 00000000 mach0       apic 00000000 mach1       apic 00000002 mach2       apic 00000004 mach3       apic 00000006 4 machs inactive

SOURCE

	/sys/src/cmd/aux/cpuid

BUGS

	Functions are architecture and vendor specific.