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
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 bandwidth 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.
Please direct bugreports and patches to: <email@example.com>
|31 October 2011||iproute2|