![]() ![]() # 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. # 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 each level comprising 1 or more instances of the next lower level. Linux uses the following taxonomy, starting with the smallest unit: Non-hyper-threading cores each correspond to 1 CPU, whereas hyper-threading cores contain more than 1 (typically: 2) - logical - CPU. Terminology note: CPU refers to the smallest processing unit as seen by the OS. Uses lscpu for Linux, and sysctl for macOS. Here's a sh (POSIX-compliant) snippet that works on Linux and macOS for determining the number of - online - logical or physical CPUs see the comments for details. Getconf _NPROCESSORS_ONLN / getconf NPROCESSORS_ONLN doesn't distinguish between logical and physical CPUs. Please provide your feedback in the below comment section.The problem with the /proc/cpuinfo-based answers is that they parse information that was meant for human consumption and thus lacks a stable format designed for machine parsing: the output format can differ across platforms and runtime conditions using lscpu -p on Linux (and sysctl on macOS) bypasses that problem. In this guide, we explored different commands to get the CPU speed information on Linux OS. MCP L2 cache: 3072 KiB Speed: 2128 MHz min/max: N/A Core speed (MHz): 1: 2128 Conclusion Run inxi command with '-C' option to print the processor related information: $ sudo inxi -CĬPU: Topology: Single Core model: Intel Core i3 M 330 bits: 64 type: Inxi is a featured rich and powerful script to print the system's hardware information in Linux. To print cpu speed, run: $ sudo dmidecode -t processor | grep "Speed"Ĭurrent Speed: 2666 MHz 8. Using dmidecodeĭmidecode is a command used in Linux to gives detailed information about the system's hardware components such as Processor, DIMMs, BIOS, etc in a human-readable format. Load optimal, suggesting to set turbo boost: off Procesor: Intel(R) Core(TM) i3 CPU M 330 2.13GHz Linux distro: UNKNOWN distro UNKNOWN version It actively monitors the laptop's battery state, CPU usage, and system load for CPU speed and power optimization. Model: 6.37.2 "Intel(R) Core(TM) i3 CPU M 330 2.13GHz"Īuto-cpufreq is a modern tool to automatically optimize CPU speed & power on the Linux platform. The following snapshot shows the output of the above command. Run the following command to get CPU speed: $ sudo hwinfo -cpu Hwinfo command is used in Linux to print detailed information about each hardware device. True Frequency (without accounting Turbo) 2128 MHz 5. Linux's inbuilt cpu_khz code emulated now To guess correctly try estimating via tsc Run 'sudo i7z' command to gives the following output: Cpu speed from cpuinfo 2128.00MhzĬpuinfo might be wrong if cpufreq is enabled. The i7z is a dedicated tool for intel i3, i5, and i7 based CPUs to display processor states. The /proc/cpuinfo system file gives the individual speed for each CPU Core system. We can filter Dmesg output using grep command, to find cpu speed: $ sudo dmesg | grep MHz Model name: AMD EPYC 7601 32-Core Processorĭmesg is a command used in Linux to display messages from the kernel ring buffer and dumped to /var/log/messages. ![]()
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