> On May 6, 2017, at 00:22, O. Hartmann <ohartm...@walstatt.org> wrote: > > I build CURRENT on two technically similar systems on a almost daily basis. > Therefore, it > was a great relief having WITH_META_MODE=yes set in /etc/src-env.conf for > incremental > builds. To make my understanding of this clear (just in case I'm wrong): > setting > WITH_META_MODE builds only portions that does not need to be build in the > make context. > > Well, the reason writing this email is: on one system, I run almost every > reboot into a > "full build" and this puzzles me a bit. The long-lasting and time exhausting > builds are > within the LLVM/CLANG tree. They consume a lot of time. The box in question > does have a > weak CPU, only two physical cores, four threads, 8GB of RAM and builds the > /usr/obj > residing on a SSD. The reference machine does have the same motherboard, also > a SSD, but > has 16 GB RAM and a 4-core/8 threads XEON CPU - but both are "IvyBridge". The > XEON > usually needs 30 - 40 minutes to compile a full world/kernel from a clean > /usr/obj, the > "weak" box takes approximately 120 minutes - it is understandable that a > shortage of the > build time is appreciated. > > Well, having said this, I need to mention that both systems use almost > identical /etc/src.conf setting - except the order of appearance of the WITH_ > tags. In > fact, they are identical except the KERNCONF (naming of the kernel) and > PORTS_MODULES=, > the "weak" box incorporates x11/nvidia-driver and > emulators/virtualbox-ose-kmod, so these > modules are build every time the system gets rebuild, but the time taken by > those is > negligible. > > The problem: to make my point clear: the "weak" box starts compiling almost > everytime now > the LLVM/CLANG tree while the XEON box does not. This is spooky. > > I deleted on both systems recently /usr/obj completely from its content and > restarted a > buildworld again to hope, that the problem was introduced due to some files > necessary for the BSD make environment to indicate the incremental build. But > no success. > Even more spooky is the fact, that after a build on the "weak" box and a > build again, the > box bevaves as expected not rebuilding everything again, but in some cases > after a > reboot, a rebuild the hits again the build of LLVM/CLANG tree, while the XEON > box does > not. > > I think there is something missing an I'd like to ask what is the suggested > way to > initially restart a full build to ensure that WITH_META_MODE gets initialised > correctly. > > Well, I'm not a developer, so please be patient with my naive report. > > Thanks in advance,
Dumb question: which kernel are you using on which machine (GENERIC,
GENERIC-NODEBUG, a custom kernel with or without debug hooks, e.g., INVARIANTS,
enabled)? Also, how are you building the system (locally using UFS or ZFS,
remotely, e.g., over NFS, etc)?
Thanks,
-Ngie
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