{"id":3252,"date":"2022-12-20T16:43:58","date_gmt":"2022-12-20T19:43:58","guid":{"rendered":"http:\/\/lode.uno\/linux-man\/index.php\/2022\/12\/20\/hfsc-man8\/"},"modified":"2022-12-20T16:43:58","modified_gmt":"2022-12-20T19:43:58","slug":"hfsc-man8","status":"publish","type":"post","link":"https:\/\/lode.uno\/linux-man\/2022\/12\/20\/hfsc-man8\/","title":{"rendered":"HFSC (man8)"},"content":{"rendered":"

HFSC<\/h1>\n

NAME<\/a>
SYNOPSIS<\/a>
DESCRIPTION (qdisc)<\/a>
DESCRIPTION (class)<\/a>
SEE ALSO<\/a>
AUTHOR<\/a> <\/p>\n

\n

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

HFSC \u2212 Hierarchical Fair Service Curve\u2019s control under linux<\/p>\n

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

tc qdisc add … hfsc [ default<\/b> CLASSID ]<\/p>\n

tc class add … hfsc [ [ rt<\/b> SC ] [ ls<\/b> SC ] | [ sc<\/b> SC ] ] [ ul<\/b> SC ]<\/p>\n

rt<\/b> : realtime service curve
ls<\/b> : linkshare service curve
sc<\/b> : rt+ls service curve
ul<\/b> : upperlimit service curve<\/p>\n

\u2022 at least one of rt<\/b>, ls<\/b> or sc<\/b> must be specified
\u2022 ul<\/b> can only be specified with ls<\/b> or sc<\/b>
SC := [ [ m1<\/b> BPS ] d<\/b> SEC ] m2<\/b> BPS<\/p>\n

m1<\/b> : slope of the first segment
d<\/b> : x\u2212coordinate of intersection
m2<\/b> : slope of the second segment<\/p>\n

SC := [ [ umax<\/b> BYTE ] dmax<\/b> SEC ] rate<\/b> BPS<\/p>\n

umax<\/b> : maximum unit of work
dmax<\/b> : maximum delay
rate<\/b> : rate<\/p>\n

For description of BYTE, BPS and SEC \u2212 please see UNITS<\/b> section of tc<\/b>(8).<\/p>\n

DESCRIPTION (qdisc) <\/a> <\/h2>\n

HFSC qdisc has only one optional parameter \u2212 default<\/b>. CLASSID specifies the minor part of the default classid, where packets not classified by other means (e.g. u32 filter, CLASSIFY target of iptables) will be enqueued. If default<\/b> is not specified, unclassified packets will be dropped.<\/p>\n

DESCRIPTION (class) <\/a> <\/h2>\n

HFSC class is used to create a class hierarchy for HFSC scheduler. For explanation of the algorithm, and the meaning behind rt<\/b>, ls<\/b>, sc<\/b> and ul<\/b> service curves \u2212 please refer to tc\u2212hfsc<\/b>(7).<\/p>\n

As you can see in SYNOPSIS<\/b>, service curve (SC) can be specified in two ways. Either as maximum delay for certain amount of work, or as a bandwidth assigned for certain amount of time. Obviously, m1<\/b> is simply umax<\/b>\/dmax<\/b>.<\/p>\n

Both m2<\/b> and rate<\/b> are mandatory. If you omit other parameters, you will specify linear service curve.<\/p>\n

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

tc<\/b>(8), tc\u2212hfsc<\/b>(7), tc\u2212stab<\/b>(8)<\/p>\n

Please direct bugreports and patches to: <\/p>\n

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

Manpage created by Michal Soltys (soltys@ziu.info)<\/p>\n

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

HFSC \u2212 Hierarchical Fair Service Curve\u2019s control under linux <\/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":[5,52,4,389],"class_list":["post-3252","post","type-post","status-publish","format-standard","hentry","category-8-administracion-del-sistema","tag-5","tag-administracion","tag-man8","tag-tc-hfsc"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/3252","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=3252"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/3252\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=3252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=3252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=3252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}