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314 lines
6.4 KiB
314 lines
6.4 KiB
4 months ago
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.TH DEVLINK\-SB 8 "14 Apr 2016" "iproute2" "Linux"
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.SH NAME
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devlink-sb \- devlink shared buffer configuration
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.SH SYNOPSIS
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.sp
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.ad l
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.in +8
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.ti -8
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.B devlink
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.RI "[ " OPTIONS " ]"
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.B sb
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.RI " { " COMMAND " | "
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.BR help " }"
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.sp
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.ti -8
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.IR OPTIONS " := { "
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\fB\-V\fR[\fIersion\fR] |
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\fB\-n\fR[\fIno-nice-names\fR] }
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.ti -8
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.BR "devlink sb show "
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.RI "[ " DEV " [ "
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.B sb
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.IR SB_INDEX " ] ]"
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.ti -8
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.BR "devlink sb pool show "
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.RI "[ " DEV " [ "
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.B sb
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.IR SB_INDEX " ] "
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.br
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.B pool
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.IR POOL_INDEX " ]"
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.ti -8
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.BI "devlink sb pool set " DEV "
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.RB "[ " sb
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.IR SB_INDEX " ] "
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.br
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.BI pool " POOL_INDEX "
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.br
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.BI size " POOL_SIZE "
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.br
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.BR thtype " { " static " | " dynamic " }"
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.ti -8
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.BR "devlink sb port pool show "
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.RI "[ " DEV/PORT_INDEX " [ "
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.B sb
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.IR SB_INDEX " ] "
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.br
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.B pool
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.IR POOL_INDEX " ]"
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.ti -8
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.BI "devlink sb port pool set " DEV/PORT_INDEX "
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.RB "[ " sb
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.IR SB_INDEX " ] "
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.br
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.BI pool " POOL_INDEX "
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.br
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.BI th " THRESHOLD "
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.ti -8
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.BR "devlink sb tc bind show "
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.RI "[ " DEV/PORT_INDEX " [ "
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.B sb
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.IR SB_INDEX " ] "
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.br
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.BI tc " TC_INDEX "
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.br
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.B type
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.RB "{ " ingress " | " egress " } ]"
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.ti -8
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.BI "devlink sb tc bind set " DEV/PORT_INDEX "
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.RB "[ " sb
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.IR SB_INDEX " ] "
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.br
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.BI tc " TC_INDEX "
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.br
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.BR type " { " ingress " | " egress " }"
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.br
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.BI pool " POOL_INDEX "
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.br
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.BI th " THRESHOLD "
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.ti -8
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.BR "devlink sb occupancy show "
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.RI "{ " DEV " | " DEV/PORT_INDEX " } [ "
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.B sb
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.IR SB_INDEX " ] "
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.ti -8
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.BR "devlink sb occupancy snapshot "
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.IR DEV " [ "
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.B sb
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.IR SB_INDEX " ]"
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.ti -8
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.BR "devlink sb occupancy clearmax "
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.IR DEV " [ "
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.B sb
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.IR SB_INDEX " ]"
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.ti -8
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.B devlink sb help
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.SH "DESCRIPTION"
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.SS devlink sb show - display available shared buffers and their attributes
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.PP
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.I "DEV"
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- specifies the devlink device to show shared buffers.
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If this argument is omitted all shared buffers of all devices are listed.
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.PP
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.I "SB_INDEX"
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- specifies the shared buffer.
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If this argument is omitted shared buffer with index 0 is selected.
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Behaviour of this argument it the same for every command.
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.SS devlink sb pool show - display available pools and their attributes
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.PP
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.I "DEV"
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- specifies the devlink device to show pools.
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If this argument is omitted all pools of all devices are listed.
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.SS devlink sb pool set - set attributes of pool
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.PP
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.I "DEV"
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- specifies the devlink device to set pool.
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.TP
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.BI size " POOL_SIZE"
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size of the pool in Bytes.
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.TP
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.BR thtype " { " static " | " dynamic " } "
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pool threshold type.
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.I static
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- Threshold values for the pool will be passed in Bytes.
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.I dynamic
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- Threshold values ("to_alpha") for the pool will be used to compute alpha parameter according to formula:
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.br
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.in +16
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alpha = 2 ^ (to_alpha - 10)
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.in -16
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.in +10
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The range of the passed value is between 0 to 20. The computed alpha is used to determine the maximum usage of the flow:
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.in -10
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.br
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.in +16
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max_usage = alpha / (1 + alpha) * Free_Buffer
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.in -16
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.SS devlink sb port pool show - display port-pool combinations and threshold for each
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.I "DEV/PORT_INDEX"
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- specifies the devlink port.
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.TP
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.BI pool " POOL_INDEX"
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pool index.
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.SS devlink sb port pool set - set port-pool threshold
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.I "DEV/PORT_INDEX"
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- specifies the devlink port.
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.TP
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.BI pool " POOL_INDEX"
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pool index.
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.TP
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.BI th " THRESHOLD"
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threshold value. Type of the value is either Bytes or "to_alpha", depends on
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.B thtype
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set for the pool.
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.SS devlink sb tc bind show - display port-TC to pool bindings and threshold for each
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.I "DEV/PORT_INDEX"
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- specifies the devlink port.
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.TP
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.BI tc " TC_INDEX"
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index of either ingress or egress TC, usually in range 0 to 8 (depends on device).
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.TP
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.BR type " { " ingress " | " egress " } "
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TC type.
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.SS devlink sb tc bind set - set port-TC to pool binding with specified threshold
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.I "DEV/PORT_INDEX"
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- specifies the devlink port.
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.TP
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.BI tc " TC_INDEX"
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index of either ingress or egress TC, usually in range 0 to 8 (depends on device).
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.TP
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.BR type " { " ingress " | " egress " } "
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TC type.
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.TP
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.BI pool " POOL_INDEX"
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index of pool to bind this to.
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.TP
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.BI th " THRESHOLD"
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threshold value. Type of the value is either Bytes or "to_alpha", depends on
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.B thtype
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set for the pool.
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.SS devlink sb occupancy show - display shared buffer occupancy values for device or port
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.PP
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This command is used to browse shared buffer occupancy values. Values are showed for every port-pool combination as well as for all port-TC combinations (with pool this port-TC is bound to). Format of value is:
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.br
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.in +16
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current_value/max_value
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.in -16
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Note that before showing values, one has to issue
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.b occupancy snapshot
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command first.
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.PP
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.I "DEV"
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- specifies the devlink device to show occupancy values for.
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.I "DEV/PORT_INDEX"
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- specifies the devlink port to show occupancy values for.
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.SS devlink sb occupancy snapshot - take occupancy snapshot of shared buffer for device
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This command is used to take a snapshot of shared buffer occupancy values. After that, the values can be showed using
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.B occupancy show
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command.
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.PP
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.I "DEV"
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- specifies the devlink device to take occupancy snapshot on.
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.SS devlink sb occupancy clearmax - clear occupancy watermarks of shared buffer for device
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This command is used to reset maximal occupancy values reached for whole device. Note that before browsing reset values, one has to issue
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.B occupancy snapshot
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command.
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.PP
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.I "DEV"
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- specifies the devlink device to clear occupancy watermarks on.
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.SH "EXAMPLES"
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.PP
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devlink sb show
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.RS 4
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List available share buffers.
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.RE
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.PP
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devlink sb pool show
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.RS 4
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List available pools and their config.
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.RE
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.PP
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devlink sb port pool show pci/0000:03:00.0/1 pool 0
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.RS 4
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Show port-pool setup for specified port and pool.
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.RE
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.PP
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sudo devlink sb port pool set pci/0000:03:00.0/1 pool 0 th 15
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.RS 4
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Change threshold for port specified port and pool.
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.RE
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.PP
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devlink sb tc bind show pci/0000:03:00.0/1 tc 0 type ingress
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.RS 4
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Show pool binding and threshold for specified port and TC.
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.RE
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.PP
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sudo devlink sb tc bind set pci/0000:03:00.0/1 tc 0 type ingress pool 0 th 9
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.RS 4
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Set pool binding and threshold for specified port and TC.
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.RE
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.PP
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sudo devlink sb occupancy snapshot pci/0000:03:00.0
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.RS 4
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Make a snapshot of occupancy of shared buffer for specified devlink device.
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.RE
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.PP
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devlink sb occupancy show pci/0000:03:00.0/1
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.RS 4
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Show occupancy for specified port from the snapshot.
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.RE
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.PP
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sudo devlink sb occupancy clearmax pci/0000:03:00.0
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.RS 4
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Clear watermarks for shared buffer of specified devlink device.
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.SH SEE ALSO
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.BR devlink (8),
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.BR devlink-dev (8),
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.BR devlink-port (8),
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.BR devlink-monitor (8),
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.br
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.SH AUTHOR
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Jiri Pirko <jiri@mellanox.com>
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