Step 1: Turn off swap
Turn off swap to prevent accidental swapping. Do not that disabling swap without sufficient memory can have undesired effects
Step 2: Turn off NUMA balancing
NUMA balancing can have undesired effects and since it is possible to bind the ranks and memory in HPC, this setting is not needed
echo 0 > /proc/sys/kernel/numa_balancing
Step 3: Disable ASLR (Address Space Layout Ranomization) is a security feature used to prevent the exploitation of memory vulnerabilities
echo 0 > /proc/sys/kernel/randomize_va_space
Step 4: Set CPU governor to performance and disable cc6. Setting the CPU perfomance to governor to perfomrnaces ensures max performances at all times. Disabling cc6 ensures that deeper CPU sleep states are not entered.
cpupower frequency-set -g performance
Setting cpu: 0 Setting cpu: 1 ..... .....
cpupower idle-set -d 2
Idlestate 2 disabled on CPU 0 Idlestate 2 disabled on CPU 1 Idlestate 2 disabled on CPU 2 ..... .....