On Thu, 3 Sep 2020, Sebastian Moeller wrote:
Mmmh, how did you measure the sirq percentage? Some top versions
show overall percentage with 100% meaning all CPUs, so 35% in a quadcore
could mean 1 fully maxed out CPU (25%) plus an additional 10% spread
over the other three, or something more benign. Better top (so not
busybox's) or htop versions also can show the load per CPU which is
helpful to pinpoint hotspots...
If I run iperf3 with 10 parallel sessions then htop shows this (in the
CAKE upstream direction I believe):
1 [*
0.7%] Tasks: 19, 0 thr; 2 running
2
[*********************************************************************************100.0%]
Load average: 0.48 0.16 0.05
3 [#***************************************
44.4%] Uptime: 10 days, 04:46:37
4 [************************************************
54.2%]
Mem[|#*
36.7M/3.84G]
Swp[
0K/0K]
The other direction (-R), typically this:
1 [#***********
13.0%] Tasks: 19, 0 thr; 2 running
2 [***********************************************
53.9%] Load average: 0.54 0.25 0.09
3 [#*************************************************
55.8%] Uptime: 10 days, 04:47:36
4 [**************************************************************************
84.4%]
Topology is:
PC - HGW -> Internet
iperf3 is run on the PC, HGW has CAKE in the -> Internet direction.
Best Regards
Sebastian
root@OpenWrt:~# 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 cake 8034: dev eth0 root refcnt 9 bandwidth 900Mbit diffserv3
triple-isolate nonat nowash no-ack-filter split-gso rtt 100.0ms raw overhead 0
Sent 1111772001 bytes 959703 pkt (dropped 134, overlimits 221223 requeues 179)
backlog 0b 0p requeues 179
memory used: 2751976b of 15140Kb
capacity estimate: 900Mbit
min/max network layer size: 42 / 1514
min/max overhead-adjusted size: 42 / 1514
average network hdr offset: 14
Bulk Best Effort Voice
thresh 56250Kbit 900Mbit 225Mbit
target 5.0ms 5.0ms 5.0ms
interval 100.0ms 100.0ms 100.0ms
pk_delay 0us 22us 232us
av_delay 0us 6us 7us
sp_delay 0us 4us 5us
backlog 0b 0b 0b
pkts 0 959747 90
bytes 0 1111935437 39440
way_inds 0 22964 0
way_miss 0 275 2
way_cols 0 0 0
drops 0 134 0
marks 0 0 0
ack_drop 0 0 0
sp_flows 0 3 1
bk_flows 0 1 0
un_flows 0 0 0
max_len 0 68130 3714
quantum 1514 1514 1514
--
Mikael Abrahamsson email:
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Mikael Abrahamsson email: [email protected]
_______________________________________________
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