[Buildroot] [PATCH 2/2] core/instrumentation: shave minutes off the build time
Thomas Petazzoni
thomas.petazzoni at bootlin.com
Mon Mar 19 16:50:10 UTC 2018
Hello,
On Mon, 19 Mar 2018 16:30:52 +0000, Trent Piepho wrote:
> After fixing s/L/l/, here are the timings for a 15 minute build:
>
> configure 510.29
> build 166.12
> extract 45.53
> other 43.88
> hostinstall 35.43
> check_host_rpath 33.37
> check_bin_arch 28.30
> targetinstall 23.37
> stageinstall 15.97
> step_pkg_size 9.49
Thanks for those measurements. I still find it a bit annoying that we
spend 1m10sec on instrumentation related topics on a 15 minutes build.
The use of ccache makes the build time lower than it normally is, and
therefore makes the instrumentation cost even more visible, but using
ccache is a valid use case.
Should we move the check_host_rpath and check_bin_arch checks as
finalize hooks, instead of running them at the end of each package
installation ? We can always get the package that installed the "bogus"
file through the package-file-list*.txt files, no ?
This would save 1 minute of build time on the above test.
Best regards,
Thomas
--
Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
http://bootlin.com
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