-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.

REPORT BY
    If none of the following options are included, smem reports memory usage by process.

-m, --mappings
       Report memory usage by mapping.

-u, --users
       Report memory usage by user.

    -w, --system
           Report systemwide memory usage summary.

FILTER BY
    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.

OUTPUT FORMATTING
    -c COLUMNS, --columns=COLUMNS
           Columns to show.

-H, --no-header
       Disable header line.

-k, --abbreviate
       Show unit suffixes.

-n, --numeric
       Show numeric user IDs instead of usernames.

-p, --percent
       Show percentages.

-r, --reverse
       Reverse sort.

-s SORT, --sort=SORT
       Field to sort on.

    -t, --totals
           Show totals.

OUTPUT TYPE
    These options specify graphical output styles.

--bar=BAR
       Show bar graph.

--pie=PIE
       Show pie graph.