Re: toolchain/26072 (Request: an option to build.sh, to build kernels without running "config" and "make depend")

[Luke Mewburn <luke%mewburn.net@localhost>]

On 23-05-19 20:31, Luke Mewburn wrote:
  | I did some testing on a modern system (AMD Ryzen 9 5950X 16-Core),
  | comparing using build.sh (with the config and make depend passes)
  | versus just building the kernel, both without any file changes
  | as well as touching a single source file:
  | 
  |         time ./build.sh -j32 kernel=GENERIC
  |         4.31s
  | 
  |         time nbmake-amd64 -C $SOMEDIR/sys/arch/amd64/compile/GENERIC
  |         1.18s    

Oops, I forgot to use -j 32 in the nbmake-amd64 cases.
I didn't mean that, because I wanted a fair comparison.

Didn't matter; takes the same time.


  |         touch ./sys/dev/usb/xhci.c
  |         time ./build.sh -j32 kernel=GENERIC
  |         15.51s
  | 
  |         touch ./sys/dev/usb/xhci.c
  |         time nbmake-amd64 -C $SOMEDIR/sys/arch/amd64/compile/GENERIC
  |         12.33s

With -j 32, nbmake isn't any quicker here either, recompiling a single file.


regards,
Luke.