pcp-buddyinfo(1) — Linux manual page


PCP-BUDDYINFO(1)         General Commands Manual        PCP-BUDDYINFO(1)

NAME         top

       pcp-buddyinfo - Report statistics for buddy algorithm shown in
       cat /proc/buddyinfo

SYNOPSIS         top

       pcp [pcp options] buddyinfo [-s samples] [-a archive] [-Z
       --timezone] [-z --hostzone] [-V Version]

DESCRIPTION         top

       The pcp-buddyinfo command is used for viewing different stats
       related to buddyinfo. It helps users analyze useful information
       related to the buddy algorithm. The information includes the
       total number of zones that are currently active, order pages etc.
       By default, pcp-buddyinfo reports live data for the local host.

       The statistics shown are as follows:

       HEADER          DESCRIPTION
       _               _
       Normal          zones available
       Nodes           available nodes
       Order0          available pages of order 0
       Order1          available pages of order 1
       Order2          available pages of order 2
       Order3          available pages of order 3
       Order4          available pages of order 4
       Order5          available pages of order 5
       Order6          available pages of order 6
       Order7          available pages of order 7
       Order8          available pages of order 8
       Order9          available pages of order 9
       Order10         available pages of order 10

       Each column represents the number of pages of a certain order (a
       certain size) that are available at any given time. For example,
       for zone DMA (direct memory access), there are 90 of
       2^(0*PAGE_SIZE) chunks of memory. Similarly, there are 6 of
       2^(1*PAGE_SIZE) chunks, and 2 of 2^(2*PAGE_SIZE) chunks of memory

       The DMA row references the first 16 MB on a system, the HighMem
       row references all memory greater than 4 GB on a system, and the
       Normal row references all memory in between.

OPTIONS         top

       -a, --archive
              Fetch /proc/buddyinfo for a specified archive file

       -s, --samples
              Get the buddyinfo for the specified number of samples

       -z, --hostzone
              Set the reporting timezone to the local time of metrics

       -Z, --timezone
              Set the reporting timezone

       -V, --version
              Display the version number and exit.

       -?, --help
              Display the usage message and exit.

NOTES         top

       pcp-buddyinfo collects information from /proc/buddyinfo and aims
       to be command-line and output compatible with it.


       Environment variables with the prefix PCP_ are used to
       parameterize the file and directory names used by PCP. On each
       installation, the file /etc/pcp.conf contains the local values
       for these variables. The $PCP_CONF variable may be used to
       specify an alternative configuration file, as described in

       For environment variables affecting PCP tools, see

SEE ALSO         top

       PCPIntro(1), pcp(1), pmParseInterval(3), environ(7).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at 
       ⟨http://www.pcp.io/⟩.  If you have a bug report for this manual
       page, send it to pcp@groups.io.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/performancecopilot/pcp.git⟩ on 2023-12-22.
       (At that time, the date of the most recent commit that was found
       in the repository was 2023-12-16.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

Performance Co-Pilot               PCP                  PCP-BUDDYINFO(1)