get_nprocs - Linux
Overview
get_nprocs is a command-line utility that retrieves the number of online processors (CPU cores) on the current system. It provides a quick way to get the number of available CPU cores, which can be useful for various tasks such as optimizing system resources, performance analysis, and task distribution.
Syntax
get_nprocs [OPTIONS]
Options/Flags
- -h, –help: Display usage information and exit.
- -v, –version: Print version information and exit.
Examples
- Get the number of CPU cores:
$ get_nprocs
8
- Check if the system has at least 4 CPU cores:
$ if [ $(get_nprocs) -ge 4 ]; then echo OK; fi
OK
- Use with other commands:
$ taskset -c 0-$(($(get_nprocs) - 1)) my_program # Distribute a task across all CPU cores
Common Issues
- Incorrect output: Make sure to run the command as the root user for accurate results.
- Not found: Ensure that the
get_nprocs
command is installed and available in your PATH.
Integration
- Combine with other commands: Use
get_nprocs
with commands liketaskset
ornumactl
to optimize task scheduling and memory usage. - Scripting: Integrate
get_nprocs
into scripts to automate performance analysis or resource optimization tasks.
Related Commands
nproc
: Similar toget_nprocs
, but typically includes virtual cores.lscpu
: Provides detailed information about the CPU, including core count.htop
: A graphical tool to monitor CPU usage and core distribution.