Hi Sandeep
On Wed, Jan 30, 2013 at 6:35 PM, sandeep kumar <[email protected]> wrote: > > Hi Dave. > Ok > Can you tell me which thing runs faster ? > 1)Copy zImage(compressed kernel) from flash to Ram, jump to start, Relocate compress kernel, uncompress it... > 2)Copy Image(uncompressed one) from flash to RAM and run it right away... > > My gut feeling says second one is better, thats what i m trying to prove here... :) It depends on numerous factors: 1 - Your flash speed 2 - Your RAM speed 3 - Your CPU speed 4 - Whether you have code and/or data caches enabled If you enable the caches, use DMA from NAND (so make your NAND as fast as possible), then option 1 usually blows away option 2, but your mileage may vary. Dave Hylands
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