On Mon, Jul 08, 2013 at 11:48:25AM -0500, Scott Wood wrote: > On 07/03/2013 08:08:18 PM, Kevin Hao wrote: > >On Wed, Jul 03, 2013 at 03:38:27PM -0500, Scott Wood wrote: > >> On 07/02/2013 10:00:44 PM, Kevin Hao wrote: > >> >On Tue, Jul 02, 2013 at 05:39:18PM -0500, Scott Wood wrote: > >> >> How much overhead (space and time) is this really? > >> > > >> >The following is the additional sections when relocatable is > >> >enabled for > >> >a p2020rdb board. > >> > section size > >> > .dynsym 000007f0 > >> > .dynstr 00000926 > >> > .dynamic 00000080 > >> > .hash 00000388 > >> > .interp 00000011 > >> > .rela.dyn 00215250 > >> > > >> >The time for the relocation is about 32ms on a p2020rdb board. > >> > >> Hmm... more relocations than I expected. What percentage is this of > >> the total image size? > > > >The size of vmlinux.bin is about 10M. The percentage of the relocation > >section is about 20%. But look on the bright side of thing, all > >the relocation > >stuff are in init section and should be discarded at runtime. :-) > > That doesn't reduce the space it takes up in flash...
Yes. But since we always use a compressed uImage kernel in flash, the increasing size of the image would shrink to about 500K. Thanks, Kevin > > -Scott
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