[LARTC] CBQ: sibling isolated-classes lend out bandwidth

Sebastian Spies sspies@sloc.de
Fri, 29 Oct 2004 18:24:25 +0200 

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How can it be, that class 1:3 in my case borrows, when all sibling
classes are isolated ?


nessus:~# tc -s -d class show dev eth1
class cbq 1: root rate 100Mbit cell 8b (bounded,isolated) prio
no-transmit/8 weight 100Mbit allot 1514b
level 2 ewma 5 avpkt 1000b maxidle 1us
Sent 484 bytes 7 pkts (dropped 0, overlimits 0)
  borrowed 0 overactions 0 avgidle 77 undertime 0

class cbq 1:1 parent 1: rate 768Kbit cell 8b (bounded,isolated) prio
no-transmit/8 allot 1500b
level 1 ewma 5 avpkt 1000b maxidle 3772us
Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
  borrowed 47589 overactions 0 avgidle 123622 undertime 0

class cbq 1:2 parent 1:1 leaf 20: rate 702Kbit cell 8b (isolated) prio
no-transmit/8 weight 8985bps allot 1500b
level 0 ewma 5 avpkt 1000b maxidle 4129us
Sent 0 bytes 0 pkts (dropped 0, overlimits 0)
  borrowed 0 overactions 0 avgidle 135332 undertime 0

class cbq 1:3 parent 1:1 leaf 30: rate 64Kbit cell 8b (isolated) prio
no-transmit/8 weight 819bps allot 1500b
level 0 ewma 5 avpkt 1000b maxidle 45584us
Sent 68718965 bytes 47597 pkts (dropped 0, overlimits 0)
  borrowed 47589 overactions 0 avgidle -5.67627e+06 undertime 5.57184e
+06




Greets

Sebastian Spies <sspies@sloc.de>

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How can it be, that class 1:3 in my case borrows, when all sibling classes are isolated ?<BR>
<BR>
<BR>
nessus:~# tc -s -d class show dev eth1<BR>
class cbq 1: root rate 100Mbit cell 8b (bounded,isolated) prio no-transmit/8 weight 100Mbit allot 1514b<BR>
level 2 ewma 5 avpkt 1000b maxidle 1us<BR>
Sent 484 bytes 7 pkts (dropped 0, overlimits 0)<BR>
&nbsp; borrowed 0 overactions 0 avgidle 77 undertime 0<BR>
<BR>
class cbq 1:1 parent 1: rate 768Kbit cell 8b (bounded,isolated) prio no-transmit/8 allot 1500b<BR>
level 1 ewma 5 avpkt 1000b maxidle 3772us<BR>
Sent 0 bytes 0 pkts (dropped 0, overlimits 0)<BR>
&nbsp; borrowed 47589 overactions 0 avgidle 123622 undertime 0<BR>
<BR>
class cbq 1:2 parent 1:1 leaf 20: rate 702Kbit cell 8b (isolated) prio no-transmit/8 weight 8985bps allot 1500b<BR>
level 0 ewma 5 avpkt 1000b maxidle 4129us<BR>
Sent 0 bytes 0 pkts (dropped 0, overlimits 0)<BR>
&nbsp; borrowed 0 overactions 0 avgidle 135332 undertime 0<BR>
<BR>
class cbq 1:3 parent 1:1 leaf 30: rate 64Kbit cell 8b (isolated) prio no-transmit/8 weight 819bps allot 1500b<BR>
level 0 ewma 5 avpkt 1000b maxidle 45584us<BR>
Sent 68718965 bytes 47597 pkts (dropped 0, overlimits 0)<BR>
&nbsp; borrowed 47589 overactions 0 avgidle -5.67627e+06 undertime 5.57184e+06<BR>
<BR>
<BR>
<BR>
<BR>
Greets<BR>
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Sebastian Spies &lt;<A HREF="mailto:sspies@sloc.de">sspies@sloc.de</A>&gt;
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