From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Sebastian Moeller <moeller0@gmx.de>
Cc: "Toke Høiland-Jørgensen" <toke@toke.dk>, bloat@lists.bufferbloat.net
Subject: Re: [Bloat] CAKE in openwrt high CPU
Date: Fri, 4 Sep 2020 15:37:09 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.2009041530360.20021@uplift.swm.pp.se> (raw)
In-Reply-To: <F6F30701-7A44-460F-8651-CED6B436D35A@gmx.de>
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: swmike@swm.pp.se_______________________________________________
>> Bloat mailing list
>> Bloat@lists.bufferbloat.net
>> https://lists.bufferbloat.net/listinfo/bloat
>
--
Mikael Abrahamsson email: swmike@swm.pp.se
next prev parent reply other threads:[~2020-09-04 13:37 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-30 17:27 Mikael Abrahamsson
2020-08-30 17:52 ` Dave Taht
2020-08-31 11:35 ` Toke Høiland-Jørgensen
2020-08-31 12:22 ` Mikael Abrahamsson
2020-08-31 13:29 ` Toke Høiland-Jørgensen
2020-09-03 13:10 ` Mikael Abrahamsson
2020-09-03 13:29 ` Toke Høiland-Jørgensen
2020-09-03 13:34 ` Sebastian Moeller
2020-09-03 13:32 ` Sebastian Moeller
2020-09-04 13:37 ` Mikael Abrahamsson [this message]
2020-09-04 14:12 ` Sebastian Moeller
2020-09-01 15:41 ` Jonathan Foulkes
2020-09-01 16:11 ` Toke Høiland-Jørgensen
2020-09-01 16:25 ` Sebastian Moeller
2020-09-01 18:45 ` Toke Høiland-Jørgensen
2020-09-01 19:05 ` Jonathan Morton
2020-09-01 21:09 ` Toke Høiland-Jørgensen
2020-09-01 19:01 ` Jonathan Foulkes
2020-09-01 21:11 ` Toke Høiland-Jørgensen
2020-09-02 20:26 ` Jonathan Foulkes
2020-09-02 20:57 ` Toke Høiland-Jørgensen
2020-09-03 13:19 ` Mikael Abrahamsson
2020-09-03 13:27 ` Luca Muscariello
2020-09-03 14:32 ` Toke Høiland-Jørgensen
2020-09-03 15:31 ` Luca Muscariello
2020-09-03 18:39 ` Toke Høiland-Jørgensen
2020-09-03 18:53 ` Jonathan Morton
2020-09-03 22:14 ` [Bloat] Other CAKE territory (was: CAKE in openwrt high CPU) David Collier-Brown
2020-09-04 1:19 ` Jonathan Morton
2020-09-04 13:41 ` Mikael Abrahamsson
2020-09-04 11:11 ` Toke Høiland-Jørgensen
2020-09-03 13:27 ` [Bloat] CAKE in openwrt high CPU Toke Høiland-Jørgensen
2020-09-01 16:18 ` Sebastian Moeller
2020-09-01 19:31 ` Jonathan Foulkes
2020-09-01 20:04 ` Sebastian Moeller
2020-09-01 20:09 ` Jonathan Morton
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