Hi Mikael,
Thanks! That looks like a fully saturated core, no? I do not know how to parse
the symbols here, so not sure what "class" of load is denoted by the star, but
I would guess something including sirqs? Anyway the average is ~49% load, while
clearly CPU is pegged already. I assume the htop data is from the HGW...
best regards
Sebastian
> On Sep 4, 2020, at 15:37, Mikael Abrahamsson <swm...@swm.pp.se> wrote:
>
> 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:
>>> swm...@swm.pp.se_______________________________________________
>>> Bloat mailing list
>>> Bloat@lists.bufferbloat.net
>>> https://lists.bufferbloat.net/listinfo/bloat
>>
>
> --
> Mikael Abrahamsson email: swm...@swm.pp.se
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