lsmem(1) - phpMan

LSMEM(1) User Commands LSMEM(1)

NAME
lsmem - list the ranges of available memory with their online status

SYNOPSIS
lsmem [options]

DESCRIPTION
The lsmem command lists the ranges of available memory with their online status. The
listed memory blocks correspond to the memory block representation in sysfs. The command
also shows the memory block size and the amount of memory in online and offline state.

The default output compatible with original implementation from s390-tools, but it's
strongly recommended to avoid using default outputs in your scripts. Always explicitly
define expected columns by using the --output option together with a columns list in
environments where a stable output is required.

The lsmem command lists a new memory range always when the current memory block
distinguish from the previous block by some output column. This default behavior is
possible to override by the --split option (e.g., lsmem --split=ZONES). The special word
"none" may be used to ignore all differences between memory blocks and to create as large
as possible continuous ranges. The opposite semantic is --all to list individual memory
blocks.

Note that some output columns may provide inaccurate information if a split policy forces
lsmem to ignore differences in some attributes. For example if you merge removable and
non-removable memory blocks to the one range than all the range will be marked as
non-removable on lsmem output.

Not all columns are supported on all systems. If an unsupported column is specified, lsmem
prints the column but does not provide any data for it.

Use the --help option to see the columns description.

OPTIONS
-a, --all
List each individual memory block, instead of combining memory blocks with similar
attributes.

-b, --bytes
Print the SIZE column in bytes rather than in a human-readable format.

-h, --help
Display help text and exit.

-J, --json
Use JSON output format.

-n, --noheadings
Do not print a header line.

-o, --output list
Specify which output columns to print. Use --help to get a list of all supported
columns. The default list of columns may be extended if list is specified in the
format +list (e.g., lsmem -o +NODE).

--output-all
Output all available columns.

-P, --pairs
Produce output in the form of key="value" pairs. All potentially unsafe value
characters are hex-escaped (\x<code>).

-r, --raw
Produce output in raw format. All potentially unsafe characters are hex-escaped
(\x<code>).

-S, --split list
Specify which columns (attributes) use to split memory blocks to ranges. The supported
columns are STATE, REMOVABLE, NODE and ZONES, or "none". The other columns are
silently ignored. For more details see DESCRIPTION above.

-s, --sysroot directory
Gather memory data for a Linux instance other than the instance from which the lsmem
command is issued. The specified directory is the system root of the Linux instance to
be inspected.

-V, --version
Display version information and exit.

--summary[=when]
This option controls summary lines output. The optional argument when can be never,
always or only. If the when argument is omitted, it defaults to "only". The summary
output is suppressed for --raw, --pairs and --json.

AUTHORS
lsmem was originally written by Gerald Schaefer for s390-tools in Perl. The C version for
util-linux was written by Clemens von Mann, Heiko Carstens and Karel Zak.