[Bloat] Bismark router + ecn + red tested

[Pedro Tumusok]

Hi,

I got a Linux based router, ZyXEL P2612 (ADSL2+) and also the P2812
(VDSL2) both got an ethernet wan port also.
I can mess around with qdisc on it, since the web ui QoS setup just
creates qdisc settings to correspond.

Can I have a copy of the red settings commands you used?

My router basically creates a HTB with 3 SFQ for the QoS and when I
poked at it, it looked like it would let me change the SFQ to RED.
But at that time, I did not have the time to really poke around with it.

# tc -s -d qdisc show
qdisc htb 1: dev eth0 r2q 500 default 10 direct_packets_stat 4 ver 3.17
 Sent 7150514979 bytes 10846403 pkt (dropped 0, overlimits 0 requeues 0)
 rate 154592bit 14pps droprate 0bit backlog 0b 0p requeues 0
qdisc sfq 10: dev eth0 parent 1:10 limit 128p quantum 1514b flows
128/1024 perturb 10sec
 Sent 7150491288 bytes 10846212 pkt (dropped 0, overlimits 0 requeues 0)
 rate 154592bit 14pps droprate 0bit backlog 0b 0p requeues 0
qdisc sfq 110: dev eth0 parent 1:110 limit 128p quantum 1514b flows
128/1024 perturb 10sec
 Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
 rate 0bit 0pps droprate 0bit backlog 0b 0p requeues 0
qdisc sfq 120: dev eth0 parent 1:120 limit 128p quantum 1514b flows
128/1024 perturb 10sec
 Sent 22796 bytes 185 pkt (dropped 0, overlimits 0 requeues 0)
 rate 0bit 0pps droprate 0bit backlog 0b 0p requeues 0
qdisc pfifo_fast 0: dev ra0 root bands 3 priomap  1 2 2 2 1 2 0 0 1 1
1 1 1 1 1 1
 Sent 19767464443 bytes 29505220 pkt (dropped 0, overlimits 0 requeues 0)
 rate 0bit 0pps droprate 0bit backlog 0b 0p requeues 0
qdisc pfifo 8009: dev eth0.3900 limit 1p
 Sent 6661359886 bytes 9028157 pkt (dropped 0, overlimits 0 requeues 0)
 rate 154128bit 14pps droprate 0bit backlog 0b 0p requeues 0
#

eth0 = LAN interface
ra0 = WLAN interface
eth0.3900 = Ethernet WAN interface



Its got an old kernel, with lots of patches to kernel I think, so not
sure if its easily done to create a new kernel for it either.

# uname -an
Linux P-2612HNU-F3 2.6.20.19 #44 Wed Mar 30 10:58:43 CST 2011 mips unknown
# cat /proc/cpuinfo
system type             : AR9
processor               : 0
cpu model               : MIPS 34K V4.12
BogoMIPS                : 261.32
wait instruction        : yes
microsecond timers      : yes
tlb_entries             : 16
extra interrupt vector  : yes
hardware watchpoint     : yes
ASEs implemented        : mips16 dsp mt
VCED exceptions         : not available
VCEI exceptions         : not available

# cat /proc/meminfo
MemTotal:       124096 kB
MemFree:         27316 kB
Buffers:          7512 kB
Cached:          64772 kB
SwapCached:          0 kB
Active:          44640 kB
Inactive:        37276 kB
SwapTotal:           0 kB
SwapFree:            0 kB
Dirty:               0 kB
Writeback:           0 kB
AnonPages:        9640 kB
Mapped:          27800 kB
Slab:             9620 kB
SReclaimable:     1388 kB
SUnreclaim:       8232 kB
PageTables:        760 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:     62048 kB
Committed_AS:    43156 kB
VmallocTotal:  1048404 kB
VmallocUsed:      4164 kB
VmallocChunk:  1043016 kB
#



Pedro

On Wed, May 11, 2011 at 1:22 AM, Dave Taht <dave.taht at gmail.com> wrote:
> I did a preliminary test of a bismark router with ECN and red enabled using
> a lightly modified
> version of openwrt's (nbd's) qos-scripts, doing a scp upload from my laptop
> to a server at bufferbloat.net.
>
> I artificially throttled the uplink at 1Mbit  and downlink to 10Mbit (the
> measured real values are 24Mbit and 67Mbit respectively) for this test.
>
> (there are a few other qdiscs in use, too)
>
>
> I won't claim to have configured red properly but...
>
> http://www.teklibre.com/~d/bismarkredc2d_owin.png
>
> Look better than usual bufferbloat to y'all?
>
> This was over ipv4. Thus far I've been unable to tunnel ipv6 out of gatech.
> There is native
> IPv6 around here... somewhere....
>
> --
> Dave Täht
> SKYPE: davetaht
> US Tel: 1-239-829-5608
> http://the-edge.blogspot.com
>
> _______________________________________________
> Bloat mailing list
> Bloat at lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat
>
>



-- 
Best regards / Mvh
Jan Pedro Tumusok