Thossapron Apinyapanha wrote:
> tc command's HFSC have a lot parameter with 4 curve type
>
> SC curve -> umax dmax rate
> LS curve -> umax dmax rate
> RT curve -> umax dmax rate
> UL curve -> umax dmax rate
>
> so i'dont know which parameter are appropriate for my test case
> such real time class which curve are appropriate and good working result.
LS = link-share service curve, defines relation of service between
sibling classes. Can be used for intermediate and leaf classes.
UL = upper-limit service curve, limits LS curve.
RS = real-time service curve, defines absolute service guarantees
for leaf classes. Can be used, but does nothing for intermediate
classes.
SC = service curve, sets LS and RS to the same curve. Should usually
be used for leaf-classes instead of RS.
> my assumption about umax,dmax,rate ... this is true
> first, HFSC will doing with "umax" rate but after delay exceed "dmax" rate,
> HFSC will change rate to "rate"
No, this is true for m1, d and m2 (use rate m1 for time d, then m2).
umax, dmax and rate are another way to specify the curve, m2 == rate
and m1 and d are calculated from umax and dmax.
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