<div dir="ltr">On 6 March 2018 at 18:11, Bruce Ashfield <span dir="ltr"><<a href="mailto:bruce.ashfield@windriver.com" target="_blank">bruce.ashfield@windriver.com</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">Integrating a configuration change for systemtap:<br>
<br>
features/systemtap/systemtap.<wbr>cfg: enable CONFIG_KERNEL_DEBUG<br></blockquote><div><br></div><div>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. :)</div><div><br></div><div>$ buildstats-diff 20180314122002-3a8cce8b5c2 20180314122610-a7c9bc7020a/</div><div>Ignoring tasks less than 00:03.0 (3.0s)</div><div>Ignoring differences less than 00:01.0 (1.0s)</div><div><br></div><div> PKG TASK ABSDIFF RELDIFF CPUTIME1 -> CPUTIME2</div><div> linux-yocto do_package 20.2s +153.0% 13.2s -> 33.3s</div><div> linux-yocto do_deploy 29.9s +1502.8% 2.0s -> 31.9s</div><div> linux-yocto do_package_write_ipk 125.5s +310.2% 40.5s -> 166.0s</div><div> linux-yocto do_compile_kernelmodules 142.6s +17.8% 800.3s -> 942.9s</div><div> linux-yocto do_package_write_rpm 156.0s +563.6% 27.7s -> 183.7s</div><div> linux-yocto do_compile 174.8s +18.7% 934.3s -> 1109.1s</div><div><br></div><div>Cumulative cputime:</div><div> 649.5s +35.0% 30:56.0 (1856.0s) -> 41:45.5 (2505.5s)</div><div><br></div><div>$ buildhistory-diff | grep SIZE</div><div>packages/qemux86-poky-linux/linux-yocto/kernel-vmlinux: PKGSIZE changed from 19587044 to 300944172 (+1436%)</div><div><br></div><div>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?</div><div><br></div><div>Ross </div></div></div></div>