NAME

	cpuid, icanhasvmx – print processor information

SYNOPSIS

	aux/cpuid [ –ar ] aux/icanhasvmx [ –r ]

DESCRIPTION

Intel and compatible processors since the Pentium(tm) (or late 486) provide the CPUID instruction that returns information about the chip. The cpuid program enumerates and prints this information in a simple textual format. The output consists of multiple lines prefixed with a keyword describing the information that follows. With the –r option, the format changes to raw hexadecimal output with the keyword being the AX input register to the CPUID instruction followed by 4 colums with the output registers AX, BX, CX and DX. The –a option prints enumerated items in raw format if no keyword is known instead of omitting it (default). The keywords supported so far are: vendor Processor vendor string procmodel, extmodel Processor model, hexadecimal model / family id features, extfeatures Feature bits, a variable list of feature acronyms procname Processor name string physbits, virtbits, guestbits Address lines, decimal in bits Icanhasvmx queries the virtual machine extension (VMX) capabilities. If –r is specified, it prints the results in raw hexadecimal; otherwise it produces a human–readable format. In any case it prints a summary on fd 2.

EXAMPLE

	term% aux/cpuid vendor GenuineIntel procmodel 000006b4 / 00000006 features fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 features mmx fxsr sse extmodel 00000000 / 00000000 procname Mobile Intel(R) Pentium(R) III CPU – M    1133MHz

SOURCE

	/sys/src/cmd/aux/cpuid.c