{"id":3128,"date":"2022-12-20T16:43:33","date_gmt":"2022-12-20T19:43:33","guid":{"rendered":"http:\/\/lode.uno\/linux-man\/index.php\/2022\/12\/20\/devlinksb-man8\/"},"modified":"2022-12-20T16:43:33","modified_gmt":"2022-12-20T19:43:33","slug":"devlinksb-man8","status":"publish","type":"post","link":"https:\/\/lode.uno\/linux-man\/2022\/12\/20\/devlinksb-man8\/","title":{"rendered":"DEVLINK−SB (man8)"},"content":{"rendered":"

DEVLINK\u2212SB<\/h1>\n

NAME<\/a>
SYNOPSIS<\/a>
DESCRIPTION<\/a>
EXAMPLES<\/a>
SEE ALSO<\/a>
AUTHOR<\/a> <\/p>\n

\n

NAME <\/a> <\/h2>\n

devlink-sb \u2212 devlink shared buffer configuration<\/p>\n

SYNOPSIS <\/a> <\/h2>\n

devlink<\/b> [ OPTIONS<\/i> ] sb<\/b> { COMMAND<\/i> | help<\/b> }<\/p>\n

OPTIONS<\/i> := { \u2212V<\/b>[ersion<\/i>] | \u2212n<\/b>[no-nice-names<\/i>] }<\/p>\n

devlink sb show<\/b> [ DEV<\/i> [ sb<\/b> SB_INDEX<\/i> ] ]<\/p>\n

devlink sb pool show<\/b> [ DEV<\/i> [ sb<\/b> SB_INDEX<\/i> ]
pool<\/b> POOL_INDEX<\/i> ]<\/p>\n

devlink sb pool set<\/b> DEV<\/i> [ sb<\/b> SB_INDEX<\/i> ]
pool<\/b> POOL_INDEX<\/i>
size<\/b> POOL_SIZE<\/i>
thtype<\/b> { static<\/b> | dynamic<\/b> }<\/p>\n

devlink sb port pool show<\/b> [ DEV\/PORT_INDEX<\/i> [ sb<\/b> SB_INDEX<\/i> ]
pool<\/b> POOL_INDEX<\/i> ]<\/p>\n

devlink sb port pool set<\/b> DEV\/PORT_INDEX<\/i> [ sb<\/b> SB_INDEX<\/i> ]
pool<\/b> POOL_INDEX<\/i>
th<\/b> THRESHOLD<\/i><\/p>\n

devlink sb tc bind show<\/b> [ DEV\/PORT_INDEX<\/i> [ sb<\/b> SB_INDEX<\/i> ]
tc<\/b> TC_INDEX<\/i>
type<\/b> { ingress<\/b> | egress<\/b> } ]<\/p>\n

devlink sb tc bind set<\/b> DEV\/PORT_INDEX<\/i> [ sb<\/b> SB_INDEX<\/i> ]
tc<\/b> TC_INDEX<\/i>
type<\/b> { ingress<\/b> | egress<\/b> }
pool<\/b> POOL_INDEX<\/i>
th<\/b> THRESHOLD<\/i><\/p>\n

devlink sb occupancy show<\/b> { DEV<\/i> | DEV\/PORT_INDEX<\/i> } [ sb<\/b> SB_INDEX<\/i> ]<\/p>\n

devlink sb occupancy snapshot<\/b> DEV<\/i> [ sb<\/b> SB_INDEX<\/i> ]<\/p>\n

devlink sb occupancy clearmax<\/b> DEV<\/i> [ sb<\/b> SB_INDEX<\/i> ]<\/p>\n

devlink sb help<\/b><\/p>\n

DESCRIPTION <\/a> <\/h2>\n

devlink sb show – display available shared buffers and their attributes<\/b>
DEV<\/i> – specifies the devlink device to show shared buffers. If this argument is omitted all shared buffers of all devices are listed.<\/p>\n

SB_INDEX<\/i> – specifies the shared buffer. If this argument is omitted shared buffer with index 0 is selected. Behaviour of this argument it the same for every command.<\/p>\n

devlink sb pool show – display available pools and their attributes<\/b>
DEV<\/i> – specifies the devlink device to show pools. If this argument is omitted all pools of all devices are listed.<\/p>\n

Display available pools listing their type, size, thtype<\/b> and cell_size. cell_size<\/b> is the allocation granularity of memory within the shared buffer. Drivers may round up, round down or reject size<\/b> passed to the set command if it is not multiple of cell_size.<\/b><\/p>\n

devlink sb pool set – set attributes of pool<\/b>
DEV<\/i> – specifies the devlink device to set pool.
size<\/b> POOL_SIZE<\/i><\/p>\n

size of the pool in Bytes.<\/p>\n

thtype<\/b> { static<\/b> | dynamic<\/b> }<\/p>\n

pool threshold type.<\/p>\n

static<\/i> – Threshold values for the pool will be passed in Bytes.<\/p>\n

dynamic<\/i> – Threshold values (“to_alpha”) for the pool will be used to compute alpha parameter according to formula:<\/p>\n

alpha = 2 ^ (to_alpha – 10)<\/p>\n

The range of the passed value is between 0 to 20. The computed alpha is used to determine the maximum usage of the flow:<\/p>\n

max_usage = alpha \/ (1 + alpha) bodies manpages.csv script_extrae_body.sh script.sh usr Free_Buffer<\/p>\n

devlink sb port pool show – display port-pool combinations and threshold for each<\/b>
DEV\/PORT_INDEX<\/i> – specifies the devlink port.
pool<\/b> POOL_INDEX<\/i><\/p>\n

pool index.<\/p>\n

devlink sb port pool set – set port-pool threshold<\/b>
DEV\/PORT_INDEX<\/i> – specifies the devlink port.
pool<\/b> POOL_INDEX<\/i><\/p>\n

pool index.<\/p>\n

th<\/b> THRESHOLD<\/i><\/p>\n

threshold value. Type of the value is either Bytes or “to_alpha”, depends on thtype<\/b> set for the pool.<\/p>\n

devlink sb tc bind show – display port-TC to pool bindings and threshold for each<\/b>
DEV\/PORT_INDEX<\/i> – specifies the devlink port.
tc<\/b> TC_INDEX<\/i><\/p>\n

index of either ingress or egress TC, usually in range 0 to 8 (depends on device).<\/p>\n

type<\/b> { ingress<\/b> | egress<\/b> }<\/p>\n

TC type.<\/p>\n

devlink sb tc bind set – set port-TC to pool binding with specified threshold<\/b>
DEV\/PORT_INDEX<\/i> – specifies the devlink port.
tc<\/b> TC_INDEX<\/i><\/p>\n

index of either ingress or egress TC, usually in range 0 to 8 (depends on device).<\/p>\n

type<\/b> { ingress<\/b> | egress<\/b> }<\/p>\n

TC type.<\/p>\n

pool<\/b> POOL_INDEX<\/i><\/p>\n

index of pool to bind this to.<\/p>\n

th<\/b> THRESHOLD<\/i><\/p>\n

threshold value. Type of the value is either Bytes or “to_alpha”, depends on thtype<\/b> set for the pool.<\/p>\n

devlink sb occupancy show – display shared buffer occupancy values for device or port<\/b>
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:<\/p>\n

current_value\/max_value<\/p>\n

Note that before showing values, one has to issue occupancy snapshot<\/b> command first.<\/p>\n

DEV<\/i> – specifies the devlink device to show occupancy values for.<\/p>\n

DEV\/PORT_INDEX<\/i> – specifies the devlink port to show occupancy values for.<\/p>\n

devlink sb occupancy snapshot – take occupancy snapshot of shared buffer for device<\/b>
This command is used to take a snapshot of shared buffer occupancy values. After that, the values can be showed using occupancy show<\/b> command.<\/p>\n

DEV<\/i> – specifies the devlink device to take occupancy snapshot on.<\/p>\n

devlink sb occupancy clearmax – clear occupancy watermarks of shared buffer for device<\/b>
This command is used to reset maximal occupancy values reached for whole device. Note that before browsing reset values, one has to issue occupancy snapshot<\/b> command.<\/p>\n

DEV<\/i> – specifies the devlink device to clear occupancy watermarks on.<\/p>\n

EXAMPLES <\/a> <\/h2>\n

devlink sb show<\/p>\n

List available share buffers.<\/p>\n

devlink sb pool show<\/p>\n

List available pools and their config.<\/p>\n

devlink sb port pool show pci\/0000:03:00.0\/1 pool 0<\/p>\n

Show port-pool setup for specified port and pool.<\/p>\n

sudo devlink sb port pool set pci\/0000:03:00.0\/1 pool 0 th 15<\/p>\n

Change threshold for port specified port and pool.<\/p>\n

devlink sb tc bind show pci\/0000:03:00.0\/1 tc 0 type ingress<\/p>\n

Show pool binding and threshold for specified port and TC.<\/p>\n

sudo devlink sb tc bind set pci\/0000:03:00.0\/1 tc 0 type ingress pool 0 th 9<\/p>\n

Set pool binding and threshold for specified port and TC.<\/p>\n

sudo devlink sb occupancy snapshot pci\/0000:03:00.0<\/p>\n

Make a snapshot of occupancy of shared buffer for specified devlink device.<\/p>\n

devlink sb occupancy show pci\/0000:03:00.0\/1<\/p>\n

Show occupancy for specified port from the snapshot.<\/p>\n

sudo devlink sb occupancy clearmax pci\/0000:03:00.0<\/p>\n

Clear watermarks for shared buffer of specified devlink device.<\/p>\n

SEE ALSO <\/a> <\/h2>\n

devlink<\/b>(8), devlink-dev<\/b>(8), devlink-port<\/b>(8), devlink-monitor<\/b>(8),<\/p>\n

AUTHOR <\/a> <\/h2>\n

Jiri Pirko <\/p>\n

\n","protected":false},"excerpt":{"rendered":"

devlink-sb \u2212 devlink shared buffer configuration <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[5,52,273,4],"class_list":["post-3128","post","type-post","status-publish","format-standard","hentry","category-8-administracion-del-sistema","tag-5","tag-administracion","tag-devlink-sb","tag-man8"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/3128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=3128"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/3128\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=3128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=3128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=3128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}