From: jaypee@hotpop.com
To: linux-mips <linux-mips@linux-mips.org>
Subject: Re: Au1550 ethernet throughput low
Date: Thu, 14 Jul 2005 13:52:36 +0000 [thread overview]
Message-ID: <1121349173l.5178l.0l@cavan> (raw)
In-Reply-To: <A8A67F242940E246A515077CF9ECACC16B16C4@dbde01.ent.ti.com> (from ajaysingh@ti.com on Thu Jul 14 06:02:22 2005)
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On 14/07/05 06:02:22, Singh, Ajay wrote:
> Is your driver on Linux 2.6 NAPI enabled ? And is CONFIG_PREEMPT=y?
Turning preempt on made no difference, maybe a little worse.
I put a scope on the TX enable line and it is high for ~100us and low
~50us. With the 2.4 kernel on au1000 it is high all the time.
This to me suggest there is some thing wrong in the au1000_eth driver/
interrupt handling/ packet scheduling in 2.6 as it is not keeping the
DMA buffers full.
- --
mailto:jaypee@hotpop.com
http://www.jaypee.org.uk
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next prev parent reply other threads:[~2005-07-14 14:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-14 5:02 Au1550 ethernet throughput low Singh, Ajay
2005-07-14 5:02 ` Singh, Ajay
2005-07-14 13:52 ` jaypee [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-07-13 16:00 jaypee
2005-07-14 15:02 ` Matej Kupljen
2005-07-14 15:06 ` Pete Popov
2005-07-14 15:15 ` jaypee
2005-07-15 0:13 ` Clem Taylor
2005-07-15 8:21 ` jaypee
2005-07-15 9:17 ` Bruno Randolf
2005-07-18 9:57 ` jaypee
2005-07-18 12:56 ` Dan Malek
2005-07-18 13:41 ` jaypee
[not found] ` <ecb4efd105071809082628bb27@mail.gmail.com>
2005-07-18 17:25 ` jaypee
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