|Subject:||Re: Au1550 ethernet throughput low|
|Date:||Thu, 14 Jul 2005 13:52:36 +0000|
|In-reply-to:||<A8A67F242940E246A515077CF9ECACC16B16C4@dbde01.ent.ti.com> (from email@example.com on Thu Jul 14 06:02:22 2005)|
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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.
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