Sous Linux, la commande 'lscpu' permet d'afficher les informations concernant l'architecture CPU de la partition.
# lscpu
lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 1
On-line CPU(s) list: 0
Thread(s) per core: 1
Core(s) per socket: 1
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 58
Model name: Intel(R) Xeon(R) CPU E5-2695 v2 @ 2.40GHz
Stepping: 0
CPU MHz: 2400.000
BogoMIPS: 4800.00
Hypervisor vendor: VMware
Virtualization type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 30720K
NUMA node0 CPU(s): 0
Il est ainsi possible de voir le nombre de processeurs, l'architecture, le codage.
Ci-dessous la documentation anglaise sur la commande, selon RedHat.
NAME
lscpu - display information about the CPU architecture
SYNOPSIS
lscpu [-a|-b|-c] [-x] [-s directory] [-e [=list]|-p [=list]]
lscpu -h|-V
DESCRIPTION
lscpu gathers CPU architecture information from sysfs and
/proc/cpuinfo. The command output can be optimized for parsing or for
easy readability by humans.
The information includes, for example, the number of CPUs, threads,
cores, sockets, and Non-Uniform Memory Access (NUMA) nodes. There is
also information about the CPU caches and cache sharing, family, model,
bogoMIPS, byte order, and stepping.
Options that result in an output table have a list argument. Use this
argument to customize the command output. Specify a comma-separated
list of column labels to limit the output table to only the specified
columns, arranged in the specified order. See COLUMNS for a list of
valid column labels. The column labels are not case sensitive.
Not all columns are supported on all architectures. If an unsupported
column is specified, lscpu prints the column but does not provide any
data for it.
COLUMNS
CPU The logical CPU number of a CPU as used by the Linux kernel.
CORE The logical core number. A core can contain several CPUs.
SOCKET The logical socket number. A socket can contain several cores.
BOOK The logical book number. A book can contain several sockets.
NODE The logical NUMA node number. A node may contain several books.
CACHE Information about how caches are shared between CPUs.
ADDRESS
The physical address of a CPU.
ONLINE Indicator that shows whether the Linux instance currently makes
use of the CPU.
CONFIGURED
Indicator that shows if the hypervisor has allocated the CPU to
the virtual hardware on which the Linux instance runs. CPUs that
are configured can be set online by the Linux instance. This
column contains data only if your hardware system and hypervisor
support dynamic CPU resource allocation.
POLARIZATION
This column contains data for Linux instances that run on vir-
tual hardware with a hypervisor that can switch the CPU dis-
patching mode (polarization). The polarization can be:
horizontal The workload is spread across all available CPUs.
vertical The workload is concentrated on few CPUs.
For vertical polarization, the column also shows the degree of
concentration, high, medium, or low. This column contains data
only if your hardware system and hypervisor support CPU polar-
ization.
OPTIONS
-a, --all
Include lines for online and offline CPUs in the output (default
for -e). This option may only specified together with option -e
or -p.
-b, --online
Limit the output to online CPUs (default for -p). This option
may only be specified together with option -e or -p.
-c, --offline
Limit the output to offline CPUs. This option may only be speci-
fied together with option -e or -p.
-e, --extended [=list]
Display the CPU information in human readable format.
If the list argument is omitted, all columns for which data is
available are included in the command output.
When specifying the list argument, the string of option, equal
sign (=), and list must not contain any blanks or other white
space. Examples: ’-e=cpu,node’ or ’--extended=cpu,node’.
-h, --help
Display help information and exit.
-p, --parse [=list]
Optimize the command output for easy parsing.
If the list argument is omitted, the command output is compati-
ble with earlier versions of lscpu. In this compatible format,
two commas are used to separate CPU cache columns. If no CPU
caches are identified the cache column is omitted.
If the list argument is used, cache columns are separated with a
colon (:).
When specifying the list argument, the string of option, equal
sign (=), and list must not contain any blanks or other white
space. Examples: ’-p=cpu,node’ or ’--parse=cpu,node’.
-s, --sysroot directory
Gather CPU data for a Linux instance other than the instance
from which the lscpu command is issued. The specified directory
is the system root of the Linux instance to be inspected.
-x, --hex
Use hexadecimal masks for CPU sets (for example 0x3). The
default is to print the sets in list format (for example 0,1).
-V, --version
Display version information and exit.
BUGS
The basic overview about CPU family, model, etc. is always based on the
first CPU only.
Sometimes in Xen Dom0 the kernel reports wrong data.
On virtual hardware the number of cores per socket, etc. can be wrong.
AUTHOR
Cai Qian <Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser. ;
Karel Zak <Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser. ;
Heiko Carstens <Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser. ;
SEE ALSO
chcpu(8)
AVAILABILITY
The lscpu command is part of the util-linux package and is available
