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   dcb-buffer    ( 8 )

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Имя (Name)

dcb-buffer - show / manipulate port buffer settings of the DCB (Data Center Bridging) subsystem

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Синопсис (Synopsis)

dcb [ OPTIONS ] buffer { COMMAND | help }

dcb buffer show dev DEV [ prio-buffer ] [ buffer-size ] [ total- size ]

dcb buffer set dev DEV [ prio-buffer PRIO-MAP ] [ buffer-size SIZE-MAP ]

PRIO-MAP := [ PRIO-MAP ] PRIO-MAPPING

PRIO-MAPPING := { PRIO | all }:BUFFER

SIZE-MAP := [ SIZE-MAP ] SIZE-MAPPING

SIZE-MAPPING := { BUFFER | all }:SIZE

PRIO := { 0 .. 7 }

BUFFER := { 0 .. 7 }

SIZE := { INTEGER | INTEGERK | INTEGERM | ... }

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Описание (Description)

dcb buffer is used to configure assignment of traffic to port buffers based on traffic priority, and sizes of those buffers. It can be also used to inspect the current configuration, as well as total device memory that the port buffers take.

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Параметры (Parameters)

For read-write parameters, the following describes only the write
       direction, i.e. as used with the set command. For the show
       command, the parameter name is to be used as a simple keyword
       without further arguments. This instructs the tool to show the
       value of a given parameter. When no parameters are given, the
       tool shows the complete buffer configuration.

       total-size
              A read-only property that shows the total device memory
              taken up by port buffers. This might be more than a simple
              sum of individual buffer sizes if there are any hidden or
              internal buffers.

       prio-buffer PRIO-MAP
              PRIO-MAP uses the array parameter syntax, see dcb(8) for
              details. Keys are priorities, values are buffer indices.
              For each priority sets a buffer where traffic with that
              priority is directed to.

       buffer-size SIZE-MAP
              SIZE-MAP uses the array parameter syntax, see dcb(8) for
              details. Keys are buffer indices, values are sizes of that
              buffer in bytes.  The sizes can use the notation
              documented in section PARAMETERS at tc(8).  Note that the
              size requested by the tool can be rounded or capped by the
              driver to satisfy the requirements of the device.

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Примеры (Examples)

Configure the priomap in a one-to-one fashion:

       # dcb buffer set dev eth0 prio-buffer 0:0 1:1 2:2 3:3 4:4 5:5 6:6
       7:7

       Set sizes of all buffers to 10KB, except for buffer 6, which will
       have the size 1MB:

       # dcb buffer set dev eth0 buffer-size all:10K 6:1M

       Show what was set:

       # dcb buffer show dev eth0
       prio-buffer 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7
       buffer-size 0:10Kb 1:10Kb 2:10Kb 3:10Kb 4:10Kb 5:10Kb 6:1Mb
       7:10Kb
       total-size 1222Kb

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Статус выхода (Exit)

Exit status is 0 if command was successful or a positive integer upon failure.

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Смотри также (See also)

dcb(8)

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Сообщение об ошибках (Reporting bugs)

Report any bugs to the Network Developers mailing list <netdev@vger.kernel.org> where the development and maintenance is primarily done. You do not have to be subscribed to the list to send a message there.

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