Note that BSD-derived systems other than anycodings_bash macOS - e.g., FreeBSD - only support the anycodings_bash hw.ncpu key for sysctl, which are anycodings_bash deprecated on macOS I'm unclear on anycodings_bash which of the new keys hw.npu corresponds anycodings_bash to: hw.(logical|physical)cpu_. # Counting the *unique* cores across lines tells us the # - in the case of hyperthreading - more logical CPUs. # Linux: The 2nd column contains the core ID, with each core ID having 1 or # which tells us the number of *logical* CPUs. # Linux: Simply count the number of (non-comment) output lines from `lscpu -p`, # Number of LOGICAL CPUs (includes those reported by hyper-threading cores) # systems, currently disabled (offline) CPUs are NOT # `-p` reports *online* CPUs only - i.e., on hot-pluggable # generated by `-p` to support older distros, too.
![bash return proc cpuinfo bash return proc cpuinfo](https://proc-cpuinfo.fixstars.com/wp-content/uploads/2017/05/cscope-4-300x181.png)
# formats, but we stick with the parseable legacy format # Note: Newer versions of `lscpu` support more flexible output # Linux: Parse output from `lscpu -p`, where each output line represents # number of *currently* available ones see below. # available dropping the "_max" suffix would report the # current power-management mode could make *fewer* CPUs # available number of CPUs is reported, whereas the # CAVEAT: Using the "_max" key suffixes means that the *maximum* # macOS: Use `sysctl -n hw.*cpu_max`, which returns the values of With anycodings_bash each level comprising 1 or more anycodings_bash instances of the next lower level. Linux anycodings_bash uses the following taxonomy, starting anycodings_bash with the smallest unit:ĬPU < core anycodings_bash < socket < book < node Non-hyper-threading cores each anycodings_bash correspond to 1 CPU, whereas anycodings_bash hyper-threading cores contain more than anycodings_bash 1 (typically: 2) - logical - CPU. Terminology note: CPU refers to the anycodings_bash smallest processing unit as seen by the anycodings_bash OS. Uses lscpu for Linux, and sysctl for anycodings_bash macOS. Here's a sh (POSIX-compliant) snippet anycodings_bash that works on Linux and macOS for anycodings_bash determining the number of - online - anycodings_bash logical or physical CPUs see the anycodings_bash comments for details.
![bash return proc cpuinfo bash return proc cpuinfo](https://pic3.zhimg.com/v2-4c8be142b778dc4305035fcf3c367b06_r.jpg)
Getconf _NPROCESSORS_ONLN / getconf anycodings_bash NPROCESSORS_ONLN doesn't distinguish anycodings_bash between logical and physical CPUs.
![bash return proc cpuinfo bash return proc cpuinfo](http://www.bitbenderforums.com/~grogan/kernhowto/cpuinfo.gif)
cache size – Tells you the amount of level 2 memory cache available to the processor.
![bash return proc cpuinfo bash return proc cpuinfo](https://cdn2.peterdavehello.org/wp-content/uploads/2016/04/screenshot-from-Linux-Command-Line-on-Windows-video-demo-apt-install-gcc-2.png)
cpu MHz – Shows the processor’s precise speed, in megahertz, to the thousandth decimal point.model name – Gives you the common name of the processor, including the project name.This is helpful to determine the type of architecture of an older system and is helpful in determining which compiled RPM package would best suit that system. If your computer is an Intel-based system, simply place the number in front of “86” to determine the value. cpu family – Authoritatively tells you the type of processor you have in the system.If you have more than one processor it will display all processor information separately counting the processors using zero notation. If you have one processor it will display a 0. processor – Provides each processor with an identifying number.Model name : Intel(R) Xeon(R) CPU E5-2660 0 2.20GHzįlags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid xsaveoptĪddress sizes : 46 bits physical, 48 bits virtualīelow is the various items you would see in the output and their respective explanations.