Hi Weijie,
On 10.01.20 11:48, Weijie Gao wrote:
<snip>
Did you compare the boot speed with using SPL + main U-Boot vs U-Boot only?
As far as I tested the difference of boot time should be less than 1s.
1 second is quite a lot of time. I prefer to stay with the non compressed boot configuration then. Testing shows that the new SPL based version also boots pretty fast, when the main U-Boot proper is not compressed.
In the current combined image the non-compressed U-Boot proper is included. Why did you not include the LZMA compressed image per default? Is the decompression too slow?
I just kept these two boards untouched. I can switch them to compressed mode if you have no concern.
I did not test yet. If its really a difference in time of 1 second (or similar), then let stay with uncompressed for these board please.
Thanks, Stefan
I did a precise measurement, and this is the result:
type | spl load/decompression time | boot to shell (total time) spl + lzma | 75ms | 563ms spl + none | 139ms | 627ms non-spl | N/A | 626ms
Great. Thanks for doing these tests and reporting here.
Actually spl+lzma is the fastest. I think this is because it has the smallest binary size.
Makes sense. SPI NOR load time savage is bigger than the added decompression time.
It's OK to switch all of them to compressed mode.
Yes, please do so. This might be a nice boot time increase for other boards as well. I'll do some tests on i.MX6 soon. :)
Thanks, Stefan