ovs-dpctl-top(8) — Linux manual page


ovs-dpctl-top(8)           Open vSwitch Manual          ovs-dpctl-top(8)

NAME         top

       ovs-dpctl-top - Top like behavior for ovs-dpctl dump-flows

SYNOPSIS         top

       ovs-dpctl-top [-h] [-v] [-f FLOWFILES] [-V] [-s] [--host HOST]
       [-a | --accumulate] [--accumulate-decay ACCUMULATEDECAY] [-d

DESCRIPTION         top

       This program summarizes ovs-dpctl flow content by aggregating the
       number of packets, total bytes and occurrence of the following

              - Datapath in_port

              - Ethernet type

              - Source and destination MAC addresses

              - IP protocol

              - Source and destination IPv4 addresses

              - Source and destination IPv6 addresses

              - UDP and TCP destination port

              - Tunnel source and destination addresses

   Output shows four values:
              - FIELDS: the flow fields for example in_port(1).

              - COUNT: the number of lines in the dump-flow output
              contain the flow field.

              - PACKETS: the total number of packets containing the flow

              - BYTES: the total number of bytes containing the flow
              field.  If units are not present then values are in bytes.

              - AVERAGE: the average packets size (BYTES/PACKET).

   Top Behavior
       While in top mode, the default behavior, the following single
       character commands are supported:

              a - toggles top in accumulate and live mode.  Accumulate
              mode is described below.

              s - toggles which column is used to sort content in
              decreasing order.  A DESC title is placed over the column.

              _ - a space indicating to collect dump-flow content again

              h - halt output.  Any character will restart sampling

              f - cycle through flow fields

              q - q for quit.

   Accumulate Mode
       There are two supported modes: live and accumulate.  The default
       is live.  The parameter --accumulate  or the 'a' character in top
       mode enables the latter.  In live mode, recent dump-flow content
       is presented.  Where as accumulate mode keeps track of the prior
       historical information until the flow is reset not when the flow
       is purged.  Reset flows are determined when the packet count for
       a flow has decreased from its previous sample.  There is one
       caveat, eventually the system will run out of memory if, after
       the accumulate-decay period any flows that have not been
       refreshed are purged.  The goal here is to free memory of flows
       that are not active.  Statistics are not decremented.  Their
       purpose is to reflect the overall history of the flow fields.

   Debugging Errors
       Parsing errors are counted and displayed in the status line at
       the beginning of the output.  Use the --verbose option with
       --script to see what output was not parsed, like this:

       $ ovs-dpctl dump-flows | ovs-dpctl-top --script --verbose

       Error messages will identify content that failed to parse.

   Access Remote Hosts
       The --host must follow the format user@hostname.  This script
       simply calls 'ssh user@Hostname' without checking for login
       credentials therefore public keys should be installed on the
       system identified by hostname, such as:

       $ ssh-copy-id user@hostname

       Consult ssh-copy-id man pages for more details.

   Expected usage
       $ ovs-dpctl-top

       or to run as a script:

       $ ovs-dpctl dump-flows > dump-flows.log

       $ ovs-dpctl-top --script --flow-file dump-flows.log

       -h, --help
              show this help message and exit.

       -v, --version
              show program's version number and exit.

       -f FLOWFILES, --flow-file FLOWFILES
              file containing flows from ovs-dpctl dump-flow.

       -V, --verbose
              enable debug level verbosity.

       -s, --script
              Run from a script (no user interface).

       --host HOST
              Specify a user@host for retrieving flows see Accessing
              Remote Hosts for more information.

       -a, --accumulate
              Accumulate dump-flow content.

       --accumulate-decay ACCUMULATEDECAY
              Decay old accumulated flows.  The default is 5 minutes. A
              value of 0 disables decay.

       -d DELAY, --delay DELAY
              Delay in milliseconds to collect dump-flow content (sample

COLOPHON         top

       This page is part of the Open vSwitch (a distributed virtual
       multilayer switch) project.  Information about the project can be
       found at ⟨http://openvswitch.org/⟩.  If you have a bug report for
       this manual page, send it to bugs@openvswitch.org.  This page was
       obtained from the project's upstream Git repository
       ⟨https://github.com/openvswitch/ovs.git⟩ on 2023-12-22.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2023-12-21.)  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

Open vSwitch                     3.2.90                 ovs-dpctl-top(8)