From: Dave Taht <dave.taht@gmail.com>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] CAKE in openwrt high CPU
Date: Sun, 30 Aug 2020 10:52:37 -0700 [thread overview]
Message-ID: <CAA93jw4qBkBw==xXoLOdmpYOp8q6Aq-ow1oAd-jyR-+oi4zg3w@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.20.2008301921450.11025@uplift.swm.pp.se>
cake reschedules too much compared to the tweaks we have to keep htb
fed, at these rates.
It was kind of my hope to gain a hw assist in future versions of the
apu series. a programmable completion interrupt is available in some
versions of that chipset,
On Sun, Aug 30, 2020 at 10:27 AM Mikael Abrahamsson via Bloat
<bloat@lists.bufferbloat.net> wrote:
>
>
> Hi,
>
> I migrated to an APU2 (https://www.pcengines.ch/apu2.htm) as residential
> router, from my previous WRT1200AC (marvell armada 385).
>
> I was running OpenWrt 18.06 on that one, now I am running latest 19.07.3
> on the APU2.
>
> Before I had 500/100 and I had to use FQ_CODEL because CAKE took too much
> CPU to be able to do 500/100 on the WRT1200AC. Now I upgraded to 1000/1000
> and tried it again, and even the APU2 can only do CAKE up to ~300
> megabit/s. With FQ_CODEL I get full speed (configure 900/900 in SQM in
> OpenWrt).
>
> Looking in top, I see sirq% sitting at 50% pegged. This is typical what I
> see when CPU based forwarding is maxed out. From my recollection of
> running CAKE on earlier versions of openwrt (17.x) I don't remember CAKE
> using more CPU than FQ_CODEL.
>
> Anyone know what's up? I'm fine running FQ_CODEL, it solves any
> bufferbloat but... I thought CAKE supposedly should use less CPU, not
> more?
>
> --
> Mikael Abrahamsson email: swmike@swm.pp.se
> _______________________________________________
> Bloat mailing list
> Bloat@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat
--
"For a successful technology, reality must take precedence over public
relations, for Mother Nature cannot be fooled" - Richard Feynman
dave@taht.net <Dave Täht> CTO, TekLibre, LLC Tel: 1-831-435-0729
next prev parent reply other threads:[~2020-08-30 17:53 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 [this message]
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
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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