On Wed, Feb 6, 2013 at 3:53 AM, sandeep kumar <coolsandyforyou@xxxxxxxxx> wrote:
Dear AllFYI:I got the below data in my board...For Zimage:Copy from eMMC to RAM(bootloader) & other stuff in bootloader -- 200msecKernel relocation --- 1msecKernel uncompression -- 700msecTotal time taken --- 900msec approxFor Image:Copy from eMMC to RAM(bootloader) & other stuff in bootloader -- 1400msecSo in case of Uncompressed kernel image.. even though it doesnt need kernel uncompression, it is taking 500msec more in bootloader.ThanksSandeep
How did you measure these times ?
On Thu, Jan 31, 2013 at 12:46 PM, Dave Hylands <dhylands@xxxxxxxxx> wrote:
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.3 - Your CPU speed2 - Your RAM speed1 - Your flash speedHi SandeepIt depends on numerous factors:
On Wed, Jan 30, 2013 at 6:35 PM, sandeep kumar <coolsandyforyou@xxxxxxxxx> 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... :)
4 - Whether you have code and/or data caches enabled
Dave Hylands--
With regards,
Sandeep Kumar Anantapalli,
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