From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <384FF0B4.E59398ED@netx4.com> Date: Thu, 09 Dec 1999 13:11:00 -0500 From: Dan Malek MIME-Version: 1.0 To: Marcus Sundberg CC: Graham Stoney , linuxppc-embedded@lists.linuxppc.org Subject: Re: FEC ERROR 41200000 on CLLF-860T References: <19991209002442.41D86118CD@elph.research.canon.com.au> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Marcus Sundberg wrote: > On vxworks the same program gives about 27 Mbit throughput, and > Windriver claims this is a limitation in the hardware... Of course they would. There are lots of stories floating around about the 8xx hardware limitations. There are manual pages and application notes that describe how the 8xx hardware works (in particular the CPM), and how you compute the capabilities. In my experience, it has lived up to the publications. You can do things that are simply inefficient, or think about the system architecture or application and program it to do the things it can perform. Even if it is "only" 20 something Mbits, how does that affect your application? That is more than double what Graham was expecting for his. Remember Ethernet is a shared resource without any deterministic or bandwidth guarantees. If it doesn't meet your requirements, perhaps you should choose from the variety of other interfaces the 8xx provides. It can run an infinite loop as fast as anything else........ -- Dan ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/