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From: Shriram Janardhan <shriramjanardhan@yahoo.com>
To: linuxppc-embedded@ozlabs.org
Subject: Gianfar - MPC8541 - tx buffer overrun errors
Date: Wed, 5 Sep 2007 18:48:44 -0700 (PDT)	[thread overview]
Message-ID: <852639.90580.qm@web58514.mail.re3.yahoo.com> (raw)

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All,
   
  I am running 2.6.11 version of the kernel on MPC8541.  Have one of the TSECs configured at 100Mbps/Full Duplex.  The TSEC MAC is connected to a Marvell Ethernet switch MAC without any PHY in between.  MAC level flow control is enabled but no pause frames sent or received.
   
  I see a high number of transmit buffer overrun errors (tx_fifo_empty errors in the gianfar driver).  I don't have NAPI enabled.  In addition to other things, I was thinking of enabling NAPI and see if it helps - is there any downside to it??  Are there any other parameters that I could tweak to reduce/eliminate the overrun errors??
   
  Thanks,
  Shriram.
   

       
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             reply	other threads:[~2007-09-06  1:55 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-06  1:48 Shriram Janardhan [this message]
  -- strict thread matches above, loose matches on Subject: below --
2007-09-06  8:43 Gianfar - MPC8541 - tx buffer overrun errors Joyeau Sylvain

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