From: Jarek Poplawski <jarkao2@gmail.com>
To: Patrick McHardy <kaber@trash.net>
Cc: Simon Horman <horms@verge.net.au>,
netdev@vger.kernel.org, David Miller <davem@davemloft.net>,
Martin Devera <devik@cdi.cz>
Subject: Re: Possible regression in HTB
Date: Wed, 8 Oct 2008 06:55:51 +0000 [thread overview]
Message-ID: <20081008065551.GB4174@ff.dom.local> (raw)
In-Reply-To: <48EBFF5E.1090902@trash.net>
On Wed, Oct 08, 2008 at 02:31:26AM +0200, Patrick McHardy wrote:
...
> I'm pretty sure that the differences are caused by HTB not being
> in control of the queue since the device is the real bottleneck
> in this configuration.
Yes, otherwise there would be no requeuing. And, btw. the golden rule
of scheduling/shaping is limiting below "hardware" limits.
> Its quite possible that there simply might
> a subtle timing change that causes feedback through HTBs borrowing
> and ceiling.
I'd add my previous suspicion there could be not enough enqeuing on
time for the fastest class (could be also very bursty), so other
classes can borrow more.
>
> So what would really be useful to understand this is to make HTB
> control the queue and see if it behaves as expected.
>
Right, trying with lower rates/ceils should explain this.
Jarek P.
next prev parent reply other threads:[~2008-10-08 6:55 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-07 1:15 Possible regression in HTB Simon Horman
2008-10-07 4:51 ` Simon Horman
2008-10-07 7:44 ` Jarek Poplawski
2008-10-07 12:03 ` Patrick McHardy
2008-10-08 0:09 ` Simon Horman
2008-10-08 6:37 ` Jarek Poplawski
2008-10-08 7:22 ` Simon Horman
2008-10-08 7:53 ` Jarek Poplawski
2008-10-07 12:20 ` Jarek Poplawski
2008-10-07 12:48 ` Patrick McHardy
2008-10-07 22:00 ` Jarek Poplawski
2008-10-08 0:21 ` Simon Horman
2008-10-08 0:31 ` Patrick McHardy
2008-10-08 0:40 ` Patrick McHardy
2008-10-08 7:34 ` Martin Devera
2008-10-08 8:53 ` Jarek Poplawski
2008-10-08 10:47 ` Martin Devera
2008-10-08 12:04 ` Jarek Poplawski
2008-10-09 1:09 ` Simon Horman
2008-10-09 6:22 ` Martin Devera
2008-10-09 9:56 ` Jarek Poplawski
2008-10-09 10:14 ` Jarek Poplawski
2008-10-09 10:52 ` Martin Devera
2008-10-09 11:04 ` Jarek Poplawski
2008-10-09 11:11 ` Simon Horman
2008-10-09 11:22 ` Martin Devera
2008-10-08 6:55 ` Jarek Poplawski [this message]
2008-10-08 7:06 ` Denys Fedoryshchenko
2008-10-08 7:46 ` [PATCH] " Jarek Poplawski
2008-10-08 18:36 ` David Miller
2008-10-08 7:22 ` Simon Horman
2008-10-08 8:03 ` Jarek Poplawski
2008-10-09 0:54 ` Simon Horman
2008-10-09 6:21 ` Jarek Poplawski
2008-10-09 6:53 ` Martin Devera
2008-10-09 11:18 ` Simon Horman
2008-10-09 11:58 ` Patrick McHardy
2008-10-09 12:36 ` Jarek Poplawski
2008-10-10 6:59 ` Jarek Poplawski
2008-10-10 8:57 ` Jarek Poplawski
2008-10-10 12:12 ` Jarek Poplawski
2008-10-08 0:10 ` Simon Horman
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