#UBUNTU CPUINFO GENERATOR#
#UBUNTU CPUINFO FULL#

perfctr_nb: NB Performance Counter Extensions.

perfctr_core: Core Performance Counter Extensions.

topoext: Topology Extensions CPUID leafs.

osvw: indicates OS Visible Workaround, which allows the OS to work around processor errata.

3dnowprefetch: 3DNow prefetch instructions.

Also depends on CR0 and Alignment Checking bit

misalignsse: indicates if a general-protection exception (#GP) is generated when some legacy SSE instructions operate on unaligned data.

cmp_legacy: If yes HyperThreading not valid.

lahf_lm: Load AH from Flags (LAHF) and Store AH into Flags (SAHF) in long mode.

More extended AMD flags: CPUID level 0x80000001, ecx

#UBUNTU CPUINFO GENERATOR#

rng_en: Random Number Generator enabled.

rng: Random Number Generator present (xstore).

VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001

rdrand: Read Random Number from hardware random number generator instruction.

xsave: Save Processor Extended States: also provides XGETBY, XRSTOR, XSETBY.

aes/ aes-ni: Advanced Encryption Standard (New Instructions).

popcnt: Return the Count of Number of Bits Set to 1 instruction ( Hamming weight, i.e.

movbe: Move Data After Swapping Bytes instruction.

vmx: Hardware virtualization: Intel VMX.

monitor: Monitor/Mwait support ( Intel SSE3 supplements).

pclmulqdq: Perform a Carry-Less Multiplication of Quadword instruction - accelerator for GCM).

pni: SSE-3 (“ Prescott New Instructions”).

See also Wikipedia and table 2-26 in Intel Advanced Vector Extensions Programming Reference Intel-defined CPU features, CPUID level 0x00000001 (ecx)

mce_recovery: CPU has recoverable machine checks.

tsc_known_freq: TSC has known frequency.

nonstop_tsc_s3: TSC doesn't stop in S3 state.

extd_apicid: has extended APICID (8 bits).

cpuid: CPU has CPUID instruction itself.

nonstop_tsc: TSC does not stop in C states.

tsc_reliable: TSC is known to be reliable.

xtopology: cpu topology enum extensions.

acc_power: AMD accumulated power mechanism.

arch_perfmon: Intel Architectural PerfMon.constant_tsc: TSC ticks at a constant rate.Transmeta-defined CPU features, CPUID level 0x80860001 3dnow: 3DNow! (AMD vector instructions, competing with Intel's SSE1).lm: Long Mode ( x86-64: amd64, also known as Intel 64, i.e.rdtscp: Read Time-Stamp Counter and Processor ID.pdpe1gb: One GB pages (allows hugepagesz=1G).syscall: SYSCALL (Fast System Call) and SYSRET (Return From Fast System Call).See also Wikipedia and table 2-23 in Intel Advanced Vector Extensions Programming Reference pbe: Pending Break Enable (PBE# pin) wakeup supportĪMD-defined CPU features, CPUID level 0x80000001.ia64: Intel Itanium Architecture 64-bit (not to be confused with Intel's 64-bit x86 architecture with flag x86-64 or 'AMD64' bit indicated by flag lm).tm: Automatic clock control (Thermal Monitor).acpi: ACPI via MSR (temperature monitoring and clock speed modulation).dts: Debug Store (buffer for debugging and profiling instructions).cmov: CMOV instructions (conditional move) (also FCMOV).pge: Page Global Enable (global bit in PDEs and PTEs).cx8: CMPXCHG8 instruction (64-bit compare-and-swap).pae: Physical Address Extensions (support for more than 4GB of RAM).msr: Model-Specific Registers (RDMSR, WRMSR).pse: Page Size Extensions (4MB memory pages).

fpu: Onboard FPU (floating point support).

See also Wikipedia and table 2-27 in Intel Advanced Vector Extensions Programming Reference Intel-defined CPU features, CPUID level 0x00000001 (edx)

#UBUNTU CPUINFO FULL#

The full listing is in the kernel source, in the file arch/x86/include/asm/cpufeatures.h. Most of the other features are only of interest to compiler or kernel authors. a hypervisor (announced as such)? hypervisor.Hardware virtualization (VMX/AMD-V)? vmx (Intel), svm (AMD).In other words, your workstation, laptop or server.) FAQ: Do I have…

Ubuntu cpuinfo