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AMD Performance (Tunings (NPS1 (1 NUMA per socket), NPS4 (4 NUMA per…
AMD Performance
Tunings
NPS1 (1 NUMA per socket)
NPS4 (4 NUMA per Socket)
Force Clk Source to TSC (Time Stamp Counter - 2%) not HPET (High Precision Event Timer - 45%
NUMA CTL Mem Binding for NPS4
FIO CPU Binding
A0 vs B0
Bandwidth
Many Core Performance
Binding
Driver
Arch POC
Stock Driver
Updated Stock Driver
Linux Kernel
RHEL 7.6 (Kernel 4.20.6)
RHEL 7.7
Kernel 5.2.x
Server DDR Memory Configuration
N-way Interleave
Most Likely Customer Configuration
Worst Performance (each CPU vyes for some pool of memory) (NPS1 or 4 impact?)
Occurs with symmetrically populated memory
Non-Interleave
Missing Dimms
Different Capacity Dimms
Less likely customer config
Best Performance (NPS1 or 4 impact?)