Hi Aaron,
On Thu, Oct 17, 2013 at 12:24 AM, Aaron Williams Aaron.Williams@caviumnetworks.com wrote:
Hi all,
In our bootloader based off of 2013.07 we make extensive use of the flat device tree. In profiling our bootloader in our simulator I found that the function eating up the most time is fdt_next_tag. Looking at it, especially fdt_offset_ptr, it looks like there is a lot of room for improvement especially in the skip name section.
Some of the checks in fdt_offset_ptr also look useless, such as if ((offset
- len) < offset) which will always be false, or
if (p + len < p)
len is always positive.
Are you using CONFIG_OF_CONTROL?
If so, as a higher-level point, we could bring in an efficient DT library, which converts the the FDT into a tree structure for faster parsing. I can point you to a starting point if you like.
Regards, Simon
-Aaron
-- Aaron Williams Software Engineer Cavium, Inc. (408) 943-7198 (510) 789-8988 (cell)
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