Oracle X4 series, Руководство администратора

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Configure Elastic Computing (Oracle Linux Operating System)
Note -
If a core is deactivated in BIOS, it cannot be activated in the OS.
Before You Begin
This task is supported on Oracle Linux 5.10 and 6.5 (x64-bit) or newer, based on UEK R3
(Unbreakable Enterprise Kernel Release 3).
This task requires root privileges.
Elastic computing requires Intel Speed Step, which can be enabled or disabled in the Advanced
- CPU Power Management Configuration screen in the BIOS Setup Utility. This setting is
enabled by default.
Note -
For Linux operating systems virtual processors are called logical processors.
In the Linux command line, logical processors are referred to as
cpu
NN , where NN is the logical
processor number. For example, logical processor 15 appears as
cpu15
.
1.
To find out how many logical processors your server has, use the command:
ls /sys/devices/system/cpu/cpu*/online | wc -l
■
If hyperthreading is enabled, this returns the number of sockets x 30.
■
If hyperthreading is disabled, this returns the number of sockets x 15.
2. To find the logical processor mapping, use the command:
grep . /sys/devices/system/node*/cpulist
Note -
You can also find the logical processor and core numbers using the instructions in
“Calculate Socket and Core Numbers” on page 209 .
This returns a list of sockets and logical processors.
■
If hyperthreading is enabled, this returns two ranges of 15 logical processors per socket.
■
If hyperthreading is disabled, this returns one range of 15 logical processors per socket.
The following example shows a four-socket server with hyperthreading enabled:
# grep . /sys/devices/system/node*/cpulist
socket 0: 0-14, 60-74
socket 1: 15-29, 75-89
socket 2: 30-44, 90-104
socket 3: 45-59, 105-119
Configure Elastic Computing 213