Oracle Corporation SPEC CPU Flags: Oracle-platform-x86_64

Compilers: n/a

Operating systems: Linux

Last updated: 13-Sep-2010 blw

This document has a description of Platform Settings

System and Other Tuning Information

Platform settings

One or more of the following settings may have been applied to the testbed. If so, the "Platform Notes" section of the report will say so; and you can read below to find out more about what these settings mean.

Boot time, BIOS settings

Intel VT-d: Disabled
VT-d, if enabled, supports remapping of I/O DMA transfers for virtualization.

Hardware Prefetch
This BIOS option allows the enabling/disabling of a processor mechanism to prefetch data into the cache according to a pattern-recognition algorithm.

Adjacent Cache Line Prefetch
This BIOS option allows the enabling/disabling of a processor mechanism to fetch the adjacent cache line within an 128-byte sector that contains the data needed due to a cache line miss.

C-State : Disabled
Enable/Disable CPUs to enter C-State (lower power CPU state) while the system is idle. This helps to lower power consumption when enabled.

Data Reuse Optimization : Disabled
Enabling this BIOS option reduces the frequency of L3 cache updates from L1.

This may improve performance by reducing the internal bandwidth consumed by constantly updating L1 cache lines in L3.

Since this results in more fetches to main memory, setting this option to Disabled may improve performance in some cases. Users should only disable this option after performing application benchmarking to verify improved performance in their environment.