NEC ExpressA1160 - Manual (Page 160)

Analyzing Processor Sockets and Cores
8-10
Caution
• If warning messages or inconsistencies appear on the partitioning Web
page, resolve the problem before continuing with a task, such as powering
up all cells. The system does not prevent you from performing partitioning
actions when warnings or inconsistencies exist. Some inconsistencies are
resolved only by performing partitioning actions, which you should do
before performing new actions. In general, inconsistencies do not occur if
you handle all warnings correctly.
• As a last resort, you can use Restore Defaults on the EXPRESSSCOPE®
Monitor cell menu to impose management firmware default settings. Refer
to
4.6 Default Settings for more information. However, this drastic
measure results in lost data and requires configuring most of the settings
on the Service Processor.
8.10. Analyzing Processor Sockets and Cores
Processor sockets are components in which processors are installed. Each cell has four
processor sockets, and each processor has up to six cores. Therefore, each cell has up
to 24 cores and a system with four cells has up to 96 cores.
Your system configuration determines how many cores are available in each partition.
The operating system in the partition usually has a maximum number of cores that it can
use. If more cores are available than it can use, the operating system usually has a
method of defining which cores it uses. Refer to the documentation for your operating
system to determine how many cores it can use and how it defines which cores it uses.
If more cores are available in a partition than the operating system can use, you can
consider the following actions:
• Reduce the number of cells in the partition by moving one or more cells to other
partitions. However, you must consider the total need for processor cores, memory,
and I/O capabilities in the partition. Reducing resources can negatively affect
application performance.
• Disable processor sockets using the remote console interface or individual
processor cores using the BIOS interface. You can select which processor sockets
or cores to disable to meet the operating system restrictions. However, you must
consider that the choice of which sockets and cores to disable can affect the
resulting application performance.
You can contact NEC services for a performance analysis to optimize your configuration
and achieve the best performance possible for your applications.