Platform Settings for Altos Intel-based servers

Firmware / BIOS / Microcode Settings

DCU Streamer Prefetcher: Allows users to configure the overall power and performance policy for the system, which adjusts a predefined set of options accordingly.; The default setting of this option is "Enable".
Power Performance Tuning: Allows the OS or BIOS to control the system's Energy Performance Bias setting.; The default setting of this option is "OS Controls EPB".; [OS Controls EPB] The Energy Performance Bias setting is controlled by the OS.; [BIOS Controls EPB] The Energy Performance Bias setting is controlled by the BIOS.
SNC (Sub-NUMA Cluster): Divides the LLC into multiple clusters based on address ranges to improve data locality and reduce average LLC access latency.; The default setting of this option is "AUTO".; [AUTO] Automatically selects the setting based on the silicon's preferred value.; [Enable SNC2 (2-clusters)] SNC2 divides the CPU socket into two clusters, creating two NUMA domains per socket.; [Disable] Disable Sub-NUMA Cluster.
LLC Dead Line Alloc: Controls whether dead lines evicted from the MLC can be allocated into the LLC when free space is available.; The default setting of this option is "Enable".
Patrol Scrub: Controls whether the system proactively scans memory to detect and repair correctable errors.; The default setting of this option is "Enable".
drop_caches: Writing 3 to this setting causes the Linux kernel to drop clean page cache and reclaimable slab objects such as dentries and inodes. The reclaimed memory becomes available for reuse. Set through "sysctl -w vm.drop_caches=3" to free page cache and reclaimable slab objects.