Debian 8 Uses only One Core of a Multi Core CPU
Problem: A fresh installed Debian 8 (Jessie) 32bit 686 uses only one core of a 6 core Xeon CPU. amd64 kernels don’t have this problem. Solution: The HP Proliant DL360 Gen9 has a BIOS option called “Processor x2APIC Support”. When you set this option to “Disabled” the Linux kernel uses all 6 cores. x2APIC is a …