/proc/cpuinfo CPU flags?
Ever wonder what those CPU flags meant when looking at /proc/cpuinfo?
Check out cpufeature.h under /usr/src/kernels/<kernel>/include/
It’ll give you a basic description of what you’re looking at.
$ pwd
/usr/src/kernels/2.6.18-92.el5-i686/include
$ find . -name cpufeature.h
./asm-i386/cpufeature.h
$ grep flags /proc/cpuinfo
flags : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
So what is fxsr?
$ grep -i fxsr /usr/src/kernels/2.6.18-92.el5-i686/include/asm-i386/cpufeature.h
#define X86_FEATURE_FXSR (0*32+24) /* FXSAVE and FXRSTOR instructions (fast save and restore */
/* of FPU context), and CR4.OSFXSR available */
Richard on August 27th, 2008
Just the information i am looking for. Thank you!