sele:

It appears on Cake / Layer Cake. Pice of Cake works better, but still with performance problems.

moeller0:

How does fq_codel/simple.qos and fq_codel/simplest.qos work for you.
Also could you please post the output of:
cat /etc/config/sqm
tc -s qdisc
tc -d qdisc

Also please post links to dslreports spedtests (ideally following the howto at [[http://example.com|External Linkhttps://forum.openwrt.org/t/sqm-qos-recommended-settings-for-the-dslreports-speedtest-bufferbloat-testing/2803]]) with and without SQM (if you have the time it would be nice to see cake/layer_cake, fq_codel/simple.qos).
And finally you could try to look at the output of "top -d 1" on your router while running the sppedtest, if %idle falls bellow 5% for single core and below 55% for dual core this might indicate you running out of CPU cycles.

sele:

##cat /etc/config/sqm

config queue 'eth1'
option qdisc_advanced '0'
option enabled '1'
option interface 'pppoe-wan'
option upload '40000'
option debug_logging '0'
option verbosity '5'
option qdisc 'cake'
option linklayer 'ethernet'
option overhead '36'
option script 'layer_cake.qos'
option download '94000'

tc -s qdisc

qdisc noqueue 0: dev lo root refcnt 2
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc mq 0: dev eth0 root
Sent 108223648 bytes 201569 pkt (dropped 0, overlimits 0 requeues 3959)
backlog 0b 0p requeues 3959
qdisc fq_codel 0: dev eth0 parent :1 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn
Sent 108223648 bytes 201569 pkt (dropped 0, overlimits 0 requeues 3959)
backlog 0b 0p requeues 3959
maxpacket 1514 drop_overlimit 0 new_flow_count 2744 ecn_mark 0
new_flows_len 0 old_flows_len 0
qdisc mq 0: dev eth1 root
Sent 129021872 bytes 129379 pkt (dropped 0, overlimits 0 requeues 7753)
backlog 0b 0p requeues 7753
qdisc fq_codel 0: dev eth1 parent :1 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn
Sent 129021872 bytes 129379 pkt (dropped 0, overlimits 0 requeues 7753)
backlog 0b 0p requeues 7753
maxpacket 1514 drop_overlimit 0 new_flow_count 11744 ecn_mark 0
new_flows_len 0 old_flows_len 0
qdisc noqueue 0: dev br-lan root refcnt 2
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc noqueue 0: dev eth1.1 root refcnt 2
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc noqueue 0: dev eth0.2 root refcnt 2
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc noqueue 0: dev wlan1 root refcnt 2
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc cake 8008: dev pppoe-wan root refcnt 2 bandwidth 40Mbit diffserv3 triple-isolate nonat nowash no-ack-filter split-gso rtt 100.0ms noatm overhead 36
Sent 103410198 bytes 159936 pkt (dropped 314, overlimits 74905 requeues 0)
backlog 0b 0p requeues 0
memory used: 311168b of 4Mb
capacity estimate: 40Mbit
min/max network layer size: 28 / 1492
min/max overhead-adjusted size: 64 / 1528
average network hdr offset: 0

               Bulk  Best Effort        Voice

thresh 2500Kbit 40Mbit 10Mbit
target 7.3ms 5.0ms 5.0ms
interval 102.3ms 100.0ms 100.0ms
pk_delay 0us 7.5ms 31us
av_delay 0us 4.0ms 10us
sp_delay 0us 11us 5us
backlog 0b 0b 0b
pkts 0 159733 517
bytes 0 103797561 81125
way_inds 0 211 0
way_miss 0 4523 339
way_cols 0 0 0
drops 0 314 0
marks 0 0 0
ack_drop 0 0 0
sp_flows 0 1 0
bk_flows 0 1 0
un_flows 0 0 0
max_len 0 11936 576
quantum 300 1220 305

qdisc ingress ffff: dev pppoe-wan parent ffff:fff1 ----------------
Sent 221754539 bytes 207433 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc noqueue 0: dev wlan0 root refcnt 2
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
qdisc cake 8009: dev ifb4pppoe-wan root refcnt 2 bandwidth 94Mbit besteffort triple-isolate nonat wash no-ack-filter split-gso rtt 100.0ms noatm overhead 36
Sent 221510921 bytes 207269 pkt (dropped 164, overlimits 62146 requeues 0)
backlog 0b 0p requeues 0
memory used: 444Kb of 4700000b
capacity estimate: 94Mbit
min/max network layer size: 28 / 1492
min/max overhead-adjusted size: 64 / 1528
average network hdr offset: 0

              Tin 0

thresh 94Mbit
target 5.0ms
interval 100.0ms
pk_delay 136us
av_delay 8us
sp_delay 6us
backlog 0b
pkts 207433
bytes 221754539
way_inds 94
way_miss 4776
way_cols 0
drops 164
marks 0
ack_drop 0
sp_flows 0
bk_flows 1
un_flows 0
max_len 1492
quantum 1514

tc -d qdisc

qdisc noqueue 0: dev lo root refcnt 2
qdisc mq 0: dev eth0 root
qdisc fq_codel 0: dev eth0 parent :1 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn
qdisc mq 0: dev eth1 root
qdisc fq_codel 0: dev eth1 parent :1 limit 10240p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn
qdisc noqueue 0: dev br-lan root refcnt 2
qdisc noqueue 0: dev eth1.1 root refcnt 2
qdisc noqueue 0: dev eth0.2 root refcnt 2
qdisc noqueue 0: dev wlan1 root refcnt 2
qdisc htb 1: dev pppoe-wan root refcnt 2 r2q 10 default 18 direct_packets_stat 0 ver 3.17 direct_qlen 3
linklayer ethernet overhead 36
qdisc fq_codel 120: dev pppoe-wan parent 1:12 limit 1001p flows 1024 quantum 300 target 5.0ms interval 100.0ms memory_limit 4Mb ecn
qdisc fq_codel 130: dev pppoe-wan parent 1:13 limit 1001p flows 1024 quantum 300 target 5.0ms interval 100.0ms memory_limit 4Mb ecn
qdisc fq_codel 110: dev pppoe-wan parent 1:11 limit 1001p flows 1024 quantum 300 target 5.0ms interval 100.0ms memory_limit 4Mb ecn
qdisc ingress ffff: dev pppoe-wan parent ffff:fff1 ----------------
qdisc noqueue 0: dev wlan0 root refcnt 2
qdisc htb 1: dev ifb4pppoe-wan root refcnt 2 r2q 10 default 16 direct_packets_stat 0 ver 3.17 direct_qlen 32
linklayer ethernet overhead 36
qdisc fq_codel 110: dev ifb4pppoe-wan parent 1:10 limit 1001p flows 1024 quantum 1514 target 5.0ms interval 100.0ms memory_limit 4Mb ecn

sele:

Speedtest with Cace / Layer Cake

sele:

Speedtest with fq_codel / simple.qos

sele:

But the results are strange, it seems that the Cake / Layer Cake setup workst for some reason better now.

moeller0:

So with your shaper settings the expected maximum speedtest results for down- and upstream are:
94000 * (1500-8-20-20)/(1528) = 87.95 Mbps
40000 * (1500-8-20-20)/(1528) = 38.01 Mbps

I believe you are not doing that badly currently. If you could press the "Results + Share" button after a test has finished you could copy a link to the detailed results page, but from the overview graphs I fail to see the exact problem.

Now the next question is going to be CPU usage during these tests...