Hi Wolfgang,
On 02.11.2011 23:48, Wolfgang Denk wrote:
Dear Daniel Schwierzeck,
In messageCACUy__UjmnRYKMWiMB9pqr0_dS6cgiyo-MsoVY4eSH2zT6ZKHA@mail.gmail.com you wrote:
On Wed, Nov 2, 2011 at 7:54 AM, Wolfgang Denkwd@denx.de wrote:
U-Boot Makefiles contain a number of tests for compiler features etc. which so far are executed again and again. =C2=A0On some architectures (especially ARM) this results in a large number of calls to gcc.
This patch makes sure to run such tests only once, thus largely reducing the number of "execve" system calls.
maybe you want to try this experimental patch. http://patchwork.ozlabs.org/patch/123313/
It significantly reduces the count of gcc calls by caching the results. This also improves compilation times.
Do you suggest this in addition or instead of the patch I posted?
as an additional but separate patch to further reduce the execution time of MAKEALL.
Can you provide some measurements of build times and/or execve system calls?
I have attached the results of some MAKEALL runs in the patch mail (I cc-ed you).
Best regards, Daniel