Provided by: smem_1.0-1_all
smem - Report memory usage with shared memory divided proportionally.
smem reports physical memory usage, taking shared memory pages into
account. Unshared memory is reported as the USS (Unique Set Size).
Shared memory is divided evenly among the processes sharing that
memory. The unshared memory (USS) plus a process's proportion of
shared memory is reported as the PSS (Proportional Set Size). The USS
and PSS only include physical memory usage. They do not include memory
that has been swapped out to disk.
Memory can be reported by process, by user, by mapping, or systemwide.
Both text mode and graphical output are available.
By default, smem will pull most of the data it needs from the /proc
filesystem of the system it is running on. The --source option lets
you used a tarred set of /proc data saved earlier, possibly on a
different machine. The --kernel and --realmem options let you specify
a couple things that smem cannot discover on its own.
-K KERNEL, --kernel=KERNEL
Path to an uncompressed kernel image. This lets smem include
the size of the kernel's code and statically allocated data in
the systemwide (-w) output. (To obtain an uncompressed image of
a kernel on disk, you may need to build the kernel yourself,
then locate file vmlinux in the source tree.)
-R REALMEM, --realmem=REALMEM
Amount of physical RAM. This lets smem detect the amount of
memory used by firmware/hardware in the systemwide (-w) output.
If provided, it will also be used as the total memory size to
base percentages on. Example: --realmem=1024M
-S SOURCE, --source=SOURCE
/proc data source. This lets you specify an alternate source of
the /proc data. For example, you can capture data from an
embedded system using smemcap, and parse the data later on a
different machine. If the --source option is not included, smem
reports memory usage on the running system.
If none of the following options are included, smem reports memory
usage by process.
Report memory usage by mapping.
Report memory usage by user.
Report systemwide memory usage summary.
If none of these options are included, memory usage is reported for all
processes, users, or mappings. (Note: If you are running as a non-root
user, and if you are not using the --source options, then you will only
see data from processes whose /proc/ information you have access to.)
-M MAPFILTER, --mapfilter=MAPFILTER
Mapping filter regular expression.
-P PROCESSFILTER, --processfilter=PROCESSFILTER
Process filter regular expression.
-U USERFILTER, --userfilter=USERFILTER
User filter regular expression.
-c COLUMNS, --columns=COLUMNS
Columns to show.
Disable header line.
Show unit suffixes.
Show numeric user IDs instead of usernames.
-s SORT, --sort=SORT
Field to sort on.
These options specify graphical output styles.
Show bar graph.
Show pie graph.
· Linux kernel 2.6.27 or newer.
· Python 2.x (at least 2.4 or so).
· The matplotlib library (only if you want to generate graphical
To capture memory statistics on resource-constrained systems, the the
smem source includes a utility named smemcap. smemcap captures all
/proc entries required by smem and outputs them as an uncompressed .tar
file to STDOUT. smem can analyze the output using the --source option.
smemcap is small and does not require Python.
To use smemcap:
1. Obtain the smem source at http://selenic.com/repo/smem
2. Compile smemcap.c for your target system.
3. Run smemcap on the target system and save the output:
smemcap > memorycapture.tar
4. Copy the output to another machine and run smem on it:
smem -S memorycapture.tar
Main Web Site: http://www.selenic.com/smem
Source code repository: http://selenic.com/repo/smem
Mailing list: http://selenic.com/mailman/listinfo/smem
free(1), pmap(1), proc(5), ps(1), top(1), vmstat(8)
Copyright (C) 2008-2009 Matt Mackall. Free use of this software is
granted under the terms of the GNU General Public License version 2 or
smem was written by Matt Mackall.