[ECOS] Slow MPC board?

[Gary Thomas]

On Tue, 2003-08-26 at 08:16, Daniel Lidsten wrote:
> Hi,
> 
> I think that my board is quite slow but i cannot find why. When i look
> in the user manual/realtime characterization for the Cogent CMA MPC860
> 33Mhz then i find it much faster then my MPC823e 50Mhz. The cogent board
> handles a clock interrupt in 14 us, i do it in 50us. A thread switch
> takes 7.5us on the cogent board and 14us on my board.
> 
> The above big difference goes through all measurements - my board is
> clocked faster then the cogent board but have half the performance. I
> have the caches (both I and D) enabled.
> 
> Ideas? Can it be any configuration issue?
> 

It could be DRAM timings - does the 823 use a UPM?

-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates


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