From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Jonathan Morton <chromatix99@gmail.com>
Cc: davecb@spamcop.net, bloat@lists.bufferbloat.net
Subject: Re: [Bloat] Other CAKE territory (was: CAKE in openwrt high CPU)
Date: Fri, 4 Sep 2020 15:41:06 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.2009041540230.20021@uplift.swm.pp.se> (raw)
In-Reply-To: <8AA690BF-B027-420B-81B1-8E9F445D5BB7@gmail.com>
On Fri, 4 Sep 2020, Jonathan Morton wrote:
> We're usually seeing problems with the smaller-scale CPUs found in CPE
> SoCs, which are very much geared to take advantage of hardware
> accelerated packet forwarding. I think in some cases there might
> actually be insufficient internal I/O bandwidth to get 1Gbps out of the
> NIC, into the CPU, and back out to the NIC again, only through the
> dedicated forwarding path. That could manifest itself as a lot of
> kernel time spent waiting for the hardware, and can only really be
> solved by redesigning the hardware.
There are lots of SoCs where CPU routing results in ~100 megabit/s of
throughput, whilst the HW offload engine is perfectly capable of full gig
speeds. MT7621 being one that actually is supported in OpenWrt.
--
Mikael Abrahamsson email: swmike@swm.pp.se
next prev parent reply other threads:[~2020-09-04 13:41 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-30 17:27 [Bloat] CAKE in openwrt high CPU 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
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 [this message]
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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