-.TH LSCPU 1 "November 2015" "util-linux" "User Commands"
+.TH LSCPU 1 "March 2019" "util-linux" "User Commands"
.SH NAME
lscpu \- display information about the CPU architecture
.SH SYNOPSIS
.B lscpu
-.RB [ \-a | \-b | \-c | \-J "] [" \-x "] [" \-y "] [" \-s " \fIdirectory\fP] [" \-e [=\fIlist\fP]| \-p [=\fIlist\fP]]
-.br
-.B lscpu
-.BR \-h | \-V
+[options]
.SH DESCRIPTION
.B lscpu
gathers CPU architecture information from sysfs, /proc/cpuinfo and any
.sp
Not all columns are supported on all architectures. If an unsupported column is
specified, \fBlscpu\fP prints the column but does not provide any data for it.
-
+.sp
+The default output formatting on terminal maybe optimized for better
+readability. The output for non-terminals (e.g., pipes) is never affected by
+this optimization and it is always in "Field: data\\n" format.
+.sp
+The cache sizes are reported as summary from all CPUs. The versions before
+v2.34 reported per-core sizes, but this output was confusing due to complicated
+CPUs topology and the way how caches are shared between CPUs. For more details
+about caches see \fB\-\-cache\fP.
.SS COLUMNS
Note that topology elements (core, socket, etc.) use a sequential unique ID
starting from zero, but CPU logical numbers follow the kernel where there is
.SH OPTIONS
.TP
.BR \-a , " \-\-all"
-Include lines for online and offline CPUs in the output (default for \fB-e\fR).
-This option may only be specified together with option \fB-e\fR or \fB-p\fR.
+Include lines for online and offline CPUs in the output (default for \fB\-e\fR).
+This option may only be specified together with option \fB\-e\fR or \fB\-p\fR.
+.TP
+.BR \-B , " \-\-bytes"
+Print the sizes in bytes rather than in a human-readable format.
.TP
.BR \-b , " \-\-online"
-Limit the output to online CPUs (default for \fB-p\fR).
-This option may only be specified together with option \fB-e\fR or \fB-p\fR.
+Limit the output to online CPUs (default for \fB\-p\fR).
+This option may only be specified together with option \fB\-e\fR or \fB\-p\fR.
+.TP
+.BR \-C , " \-\-caches" [=\fIlist\fP]
+Display details about CPU caches. For details about available information see \fB\-\-help\fR
+output.
+
+If the \fIlist\fP argument is omitted, all columns for which data is available
+are included in the command output.
+
+When specifying the \fIlist\fP argument, the string of option, equal sign (=), and
+\fIlist\fP must not contain any blanks or other whitespace.
+Examples: '\fB\-C=NAME,ONE-SIZE\fP' or '\fB\-\-caches=NAME,ONE-SIZE\fP'.
.TP
.BR \-c , " \-\-offline"
Limit the output to offline CPUs.
-This option may only be specified together with option \fB-e\fR or \fB-p\fR.
+This option may only be specified together with option \fB\-e\fR or \fB\-p\fR.
.TP
.BR \-e , " \-\-extended" [=\fIlist\fP]
Display the CPU information in human-readable format.
When specifying the \fIlist\fP argument, the string of option, equal sign (=), and
\fIlist\fP must not contain any blanks or other whitespace.
-Examples: '\fB-e=cpu,node\fP' or '\fB--extended=cpu,node\fP'.
+Examples: '\fB\-e=cpu,node\fP' or '\fB\-\-extended=cpu,node\fP'.
.TP
.BR \-h , " \-\-help"
Display help text and exit.
When specifying the \fIlist\fP argument, the string of option, equal sign (=), and
\fIlist\fP must not contain any blanks or other whitespace.
-Examples: '\fB-p=cpu,node\fP' or '\fB--parse=cpu,node\fP'.
+Examples: '\fB\-p=cpu,node\fP' or '\fB\-\-parse=cpu,node\fP'.
.TP
.BR \-s , " \-\-sysroot " \fIdirectory\fP
Gather CPU data for a Linux instance other than the instance from which the
of the Linux instance to be inspected.
.TP
.BR \-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).
+Use hexadecimal masks for CPU sets (for example "ff"). The default is to print
+the sets in list format (for example 0,1). Note that before version 2.30 the mask
+has been printed with 0x prefix.
.TP
.BR \-y , " \-\-physical"
Display physical IDs for all columns with topology elements (core, socket, etc.).
.TP
.B \-\-output\-all
Output all available columns. This option must be combined with either
-.BR \-\-extended " or " \-\-parse .
+.BR \-\-extended ", " \-\-parse " or " \-\-caches .
.SH BUGS
The basic overview of 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.
-.SH AUTHOR
+.SH AUTHORS
.nf
Cai Qian <qcai@redhat.com>
Karel Zak <kzak@redhat.com>
Heiko Carstens <heiko.carstens@de.ibm.com>
.fi
-.SH "SEE ALSO"
+.SH SEE ALSO
.BR chcpu (8)
.SH AVAILABILITY
The lscpu command is part of the util-linux package and is available from
projects / thirdparty / util-linux.git / blobdiff