cpuid

CPUID is a command line tool used to retrieve information about the processor and its capabilities. It is commonly available on Linux and Unix-like operating systems. The tool works by accessing the x86 CPUID instruction, which provides low-level information about the processor.

CPUID provides various details about the CPU, such as its brand, model, architecture, family, and stepping. It also indicates the number of logical and physical processors available. This tool can be useful in determining the specific CPU model and its features.

Furthermore, CPUID provides details about the cache hierarchy of the processor, including the sizes and associativity of the different cache levels. It also offers information about specific instruction set extensions supported by the CPU, such as SSE, AVX, or AES.

CPUID can be used for system analysis and optimization, allowing developers to tailor their code to the specific capabilities of the target processor. It is particularly helpful for identifying the CPU features required for certain software or hardware requirements.

The tool also includes options to display the hexadecimal representation of the CPUID instruction, allowing users to examine the raw output. Additionally, CPUID can be used to determine whether a processor supports virtualization technologies like Intel VT-x or AMD-V.

Overall, CPUID is a powerful command line tool that provides detailed information about the CPU, its cache hierarchy, and instruction set extensions. It is a valuable resource for system administrators, software developers, and anyone interested in understanding their processor's capabilities.