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    Command:

    tc-hfsc

    
    
    

    SYNOPSIS

           tc qdisc add ... hfsc [ default CLASSID ]
    
           tc class add ... hfsc [ [ rt SC ] [ ls SC ] | [ sc SC ] ] [ ul SC ]
    
           rt : realtime service curve
           ls : linkshare service curve
           sc : rt+ls service curve
           ul : upperlimit service curve
    
           ? at least one of rt, ls or sc must be specified
           ? ul can only be specified with ls or sc
    
           SC := [ [ m1 BPS ] d SEC ] m2 BPS
                  m1 : slope of the first segment
                  d  : x-coordinate of intersection
                  m2 : slope of the second segment
    
           SC := [ [ umax BYTE ] dmax SEC ] rate BPS
                  umax : maximum unit of work
                  dmax : maximum delay
                  rate : rate
    
           For  description  of  BYTE,  BPS  and SEC - please see UNITS section of
           tc(8).
    
    
    

    DESCRIPTION (qdisc)

           HFSC qdisc has only one optional parameter - default.   CLASSID  speci-
           fies  the  minor part of the default classid, where packets not classi-
           fied by other means (e.g. u32 filter, CLASSIFY target of iptables) will
           be  enqueued. If default is not specified, unclassified packets will be
           dropped.
    
    
    

    DESCRIPTION (class)

           HFSC class is used to create a class hierarchy for HFSC scheduler.  For
           explanation  of the algorithm, and the meaning behind rt, ls, sc and ul
           service curves - please refer to tc-hfsc(7).
    
           As you can see in SYNOPSIS, service curve (SC) can be specified in  two
           ways. Either as maximum delay for certain amount of work, or as a band-
           width assigned for certain amount of  time.  Obviously,  m1  is  simply
           umax/dmax.
    
           Both  m2 and rate are mandatory. If you omit other parameters, you will
           specify linear service curve.
    
    
    

    SEE ALSO

           tc(8), tc-hfsc(7), tc-stab(8)
    
           Please direct bugreports and patches to: <net...@vger.kernel.org>
    
    
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