On 2018-03-14 8:41 AM, Burton, Ross wrote:
On 6 March 2018 at 18:11, Bruce Ashfield <bruce.ashfi...@windriver.com
<mailto:bruce.ashfi...@windriver.com>> wrote:
Integrating a configuration change for systemtap:
features/systemtap/systemtap.cfg: enable CONFIG_KERNEL_DEBUG
I noticed that all the performance machines had a big spike in kernel
build time and build directory size, and annoyingly spent too long
bisecting builds before noticing this in the commit message for the
offending commit. If I re-read the logs I might have spotted this
sooner. :)
Agreed. I should have realized this as well, we went through a process
about a year ago of moving all of the debug configs with the split into
a production/debug set of kernel configurations.
$ buildstats-diff 20180314122002-3a8cce8b5c2 20180314122610-a7c9bc7020a/
Ignoring tasks less than 00:03.0 (3.0s)
Ignoring differences less than 00:01.0 (1.0s)
PKG TASK ABSDIFF RELDIFF CPUTIME1
-> CPUTIME2
linux-yocto do_package 20.2s +153.0% 13.2s
-> 33.3s
linux-yocto do_deploy 29.9s +1502.8% 2.0s
-> 31.9s
linux-yocto do_package_write_ipk 125.5s +310.2% 40.5s
-> 166.0s
linux-yocto do_compile_kernelmodules 142.6s +17.8% 800.3s
-> 942.9s
linux-yocto do_package_write_rpm 156.0s +563.6% 27.7s
-> 183.7s
linux-yocto do_compile 174.8s +18.7% 934.3s
-> 1109.1s
Cumulative cputime:
649.5s +35.0% 30:56.0 (1856.0s) -> 41:45.5 (2505.5s)
$ buildhistory-diff | grep SIZE
packages/qemux86-poky-linux/linux-yocto/kernel-vmlinux: PKGSIZE changed
from 19587044 to 300944172 (+1436%)
Is this really what we want out of the box? Can the kernel have the
debugging bits stripped out into a separate package so even if we have
the build time hit, we don't have the kernel size change?
I'll revert this for now (or see if I can quickly move it to a debug
kernel build), and yes, there is a better way to do this. I'm just not
sure I can get it done in time for the release.
Bruce
Ross
--
_______________________________________________
Openembedded-core mailing list
Openembedded-core@lists.openembedded.org
http://lists.openembedded.org/mailman/listinfo/openembedded-core
