From: Eric Dumazet <eric.dumazet@gmail.com>
To: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: "Toke Høiland-Jørgensen" <toke@toke.dk>,
"Mike Frysinger" <vapier@gentoo.org>,
"Jiri Pirko" <jpirko@redhat.com>,
netdev@vger.kernel.org, "Jiri Benc" <jbenc@redhat.com>,
"Patrick McHardy" <kaber@trash.net>,
"Steven Barth" <cyrus@openwrt.org>,
bloat@lists.bufferbloat.net, "David Miller" <davem@redhat.com>,
"Jussi Kivilinna" <jussi.kivilinna@mbnet.fi>,
"Felix Fietkau" <nbd@nbd.name>, "Michal Soltys" <soltys@ziu.info>
Subject: Re: [Bloat] Bad shaping at low rates, after commit 56b765b79 (htb: improved accuracy at high rates)
Date: Tue, 04 Jun 2013 08:18:53 -0700 [thread overview]
Message-ID: <1370359133.24311.208.camel@edumazet-glaptop> (raw)
In-Reply-To: <20130604141342.00c8eb9f@redhat.com>
On Tue, 2013-06-04 at 14:13 +0200, Jesper Dangaard Brouer wrote:
> Hi again,
>
> I found another regression by commit 56b765b79 (htb: improved accuracy
> at high rates).
>
> After the commit HTB does not honor network rate limiting below 500kbps.
>
> I have found that the bandwidth problem is related to GSO being enabled
> on the device. To test the situation, I had to use a real NIC (as I
> were not allowed to disable GSO on dev "lo", test below).
Well, do not forget lo mtu is 64K, so you'll also have to lower it for
your tests.
I have a good idea of what's going on for htb at low rates, I am testing
a fix, thanks for the report !
next prev parent reply other threads:[~2013-06-04 15:18 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-29 13:13 [Bloat] tc linklayer ADSL calc broken " Jesper Dangaard Brouer
2013-05-29 15:52 ` Eric Dumazet
2013-05-29 22:50 ` Stephen Hemminger
2013-05-29 23:18 ` Eric Dumazet
2013-05-30 9:15 ` Jesper Dangaard Brouer
2013-05-30 9:52 ` Steinar H. Gunderson
2013-05-30 0:34 ` Dave Taht
2013-05-30 8:09 ` Jesper Dangaard Brouer
2013-05-30 7:51 ` Jesper Dangaard Brouer
2013-05-30 14:39 ` Eric Dumazet
2013-05-30 15:55 ` Jesper Dangaard Brouer
2013-06-02 21:15 ` Eric Dumazet
2013-06-04 12:13 ` [Bloat] Bad shaping at low rates, " Jesper Dangaard Brouer
2013-06-04 15:18 ` Eric Dumazet [this message]
2013-06-04 15:55 ` Eric Dumazet
2013-06-04 16:02 ` Eric Dumazet
2013-06-04 17:11 ` [Bloat] [PATCH] net_sched: htb: do not mix 1ns and 64ns time units Eric Dumazet
2013-06-04 20:21 ` Jesper Dangaard Brouer
2013-06-04 20:26 ` Dave Taht
2013-06-04 21:02 ` Eric Dumazet
2013-06-04 20:50 ` Eric Dumazet
2013-06-05 0:44 ` David Miller
2013-06-06 13:55 ` [Bloat] RFC: Proposed fix for tc linklayer calc broken after commit 56b765b79 (htb: improved accuracy at high rates) Jesper Dangaard Brouer
2013-06-06 14:28 ` Eric Dumazet
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