Performance Tuning

Setting IRQ Affinity

CPU cores designated by bitmap

cat /proc/cpuinfo to determine how the BIOS presented
the CPUs to the system
●
Some go Socket0, core0, socket1, core0
●
Others go Socket0, core0, socket0, core1

Understand the layout of L2 cache in relationship to the cores

Remember these values do not persistent across reboots!

Set IRQ affinity
●
echo 80 > /proc/irq/192/smp_affinity
●
Use “TUNA”