CPU_ISSET - Linux
Overview
CPU_ISSET
is a Linux command that checks if a specific CPU feature is supported by the current CPU. It is a convenient tool for optimizing code by tailoring it to the capabilities of the target system.
Syntax
CPU_ISSET feature
Parameters
- feature: The CPU feature to check, such as
sse3
,avx2
, orvmx
.
Options/Flags
None.
Examples
Checking for SSE2 support
CPU_ISSET sse2
Contingency code based on CPU features
if CPU_ISSET avx512; then
# Use AVX-512 optimized code
else
# Use a fallback implementation
fi
Common Issues
- Typographical errors: Ensure the feature name is spelled correctly.
Integration
CPU_ISSET
can be used in conjunction with other commands to enhance functionality:
- With
grep
to search for features in a file:grep CPU_ISSET output.txt
- With
xargs
to check multiple features:echo sse2 avx2 | xargs -n1 CPU_ISSET
Related Commands
cat /proc/cpuinfo
: Display detailed CPU information.lscpu
: Provide detailed information about the CPU architecture.