Date: Wed, 24 Jul 2019 16:56:43 -0400 From: mike tancsa <mike@sentex.net> To: Dimitry Andric <dim@FreeBSD.org> Cc: freebsd-stable@freebsd.org Subject: Re: Buildworld times (was Re: svn commit: r350256 - in stable/12: . contrib/compiler-rt/lib/sanitizer_common contrib/libunwind/src contrib/llvm/lib/DebugInfo/DWARF contrib/llvm/lib/MC contrib/llvm/lib/Object contrib/llvm/lib/Ta...) Message-ID: <801c0dd8-7a50-d93f-77f6-999aaa91a295@sentex.net> In-Reply-To: <b07742fd-2d3a-3ada-7066-6e5762e64473@sentex.net> References: <201907231840.x6NIeWeq024894@repo.freebsd.org> <b085970b-4e20-6802-182a-c6c976b4fc05@sentex.net> <0CB72C19-405C-41F0-8967-96F363228ED6@FreeBSD.org> <f428eb69-ae82-2255-19ce-3b81e8c68f6e@sentex.net> <8373E39A-46E7-41AB-BC1F-8CDF65F47287@FreeBSD.org> <b07742fd-2d3a-3ada-7066-6e5762e64473@sentex.net>
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On 7/24/2019 1:21 PM, mike tancsa wrote: > On 7/24/2019 12:02 PM, Dimitry Andric wrote: >> On 24 Jul 2019, at 17:12, mike tancsa <mike@sentex.net> wrote: >>> On 7/24/2019 9:45 AM, Dimitry Andric wrote: >>>> On 24 Jul 2019, at 14:47, mike tancsa <mike@sentex.net> wrote: >>>>> On 7/23/2019 2:40 PM, Dimitry Andric wrote: >>>>>> Author: dim >>>>>> Date: Tue Jul 23 18:40:32 2019 >>>>>> New Revision: 350256 >>>>>> URL: https://svnweb.freebsd.org/changeset/base/350256 >>>>>> >>>>> Hi, >>>>> >>>>> Not sure if this is just a difference in the versions or more things >>>>> are being compiled, but I noticed a buildworld on my Ryzen went from ~ >>>>> 31min to just over 40min. Is this expected ? >>>> Most likely this is because it will now build a bootstrap compiler, >>>> whereas previously your system may have skipped this step. Can you >>>> compare the results when setting MK_SYSTEM_COMPILER=no and >>>> MK_SYSTEM_LINKER=no ? >>> Adding those two to src.conf and make.conf still shows 40min >>> >>> time make -j14 buildworld > /var/log/build.out ; time make -j14 >>> buildkernel > /var/log/build.out. >>> [Creating objdir /usr/obj/usr/src/amd64.amd64...] >>> 25312.621u 1237.984s 40:09.72 1101.8% 45579+3473k 656666+3288880io >>> 214633pf+0w >>> 1675.467u 173.497s 2:37.90 1170.9% 37728+3167k 207118+3329460io >>> 61829pf+0w >>> >>> Should I be setting these vars somewhere else ? >> Ah, setting them in src.conf, make.conf or the environment will be >> overridden from Makefile.inc1, unfortunately. It will then show >> something like: >> >> make[1]: "/home/dim/src/stable-12/Makefile.inc1" line 343: SYSTEM_COMPILER: libclang will be built for bootstrapping a cross-compiler. >> make[1]: "/home/dim/src/stable-12/Makefile.inc1" line 348: SYSTEM_LINKER: libclang will be built for bootstrapping a cross-linker. >> >> E.g, it detects that your system compiler is of a lower version than >> the compiler in the source tree, and will thus bootstrap the latter. >> >> Can you compare the timings when setting MK_SYSTEM_COMPILER=yes and >> MK_SYSTEM_LINKER=yes? In that case, both before and after r350256, the >> results should be fairly similar, I expect. > odd, its still taking the same 40min > > # time make -j14 buildworld > /var/log/build.out ; time make -j14 > buildkernel > > /var/log/build.out. > [Creating objdir /usr/obj/usr/src/amd64.amd64...] > 25281.564u 1233.340s 40:31.08 1090.6% 45595+3474k 633698+3288574io > 213653pf+0w > 1675.796u 172.082s 2:38.19 1168.1% 37746+3170k 205909+3329072io > 61654pf+0w > > > Looking at /var/log/build.out, the top line show > > # head /var/log/build.out > --- buildworld --- > make[1]: "/usr/src/Makefile.inc1" line 343: SYSTEM_COMPILER: libclang > will be built for bootstrapping a cross-compiler. > make[1]: "/usr/src/Makefile.inc1" line 348: SYSTEM_LINKER: libclang will > be built for bootstrapping a cross-linker. > --- buildworld_prologue --- > > despite > > # cat /etc/src.conf /etc/make.conf > MK_SYSTEM_COMPILER=no > MK_SYSTEM_LINKER=no > KERNCONF=server > MK_SYSTEM_COMPILER=no > MK_SYSTEM_LINKER=no Hmmm, is the logic reversed somehow ? The good news is if nothing is defined, it does the right thing. # head -3 /var/log/build.out.2 --- buildworld --- make[1]: "/usr/src/Makefile.inc1" line 341: SYSTEM_COMPILER: Determined that CC=cc matches the source tree. Not bootstrapping a cross-compiler. make[1]: "/usr/src/Makefile.inc1" line 346: SYSTEM_LINKER: Determined that LD=ld matches the source tree. Not bootstrapping a cross-linker. # time make -j14 buildworld > /var/log/build.out.2 [Creating objdir /usr/obj/usr/src/amd64.amd64...] 19068.507u 1118.866s 31:07.44 1081.0% 54443+3546k 579241+2828231io 173288pf+0w # cat /etc/src.conf /etc/make.conf MK_SYSTEM_COMPILER=yes MK_SYSTEM_LINKER=yes KERNCONF=server MK_SYSTEM_COMPILER=yes MK_SYSTEM_LINKER=yes If I comment them out, head -4 /var/log/build.out.3-no-defs-in-src-or-make --- buildworld --- make[1]: "/usr/src/Makefile.inc1" line 341: SYSTEM_COMPILER: Determined that CC=cc matches the source tree. Not bootstrapping a cross-compiler. make[1]: "/usr/src/Makefile.inc1" line 346: SYSTEM_LINKER: Determined that LD=ld matches the source tree. Not bootstrapping a cross-linker. --- buildworld_prologue --- # cat /etc/src.conf /etc/make.conf #MK_SYSTEM_COMPILER=yes #MK_SYSTEM_LINKER=yes KERNCONF=server #MK_SYSTEM_COMPILER=yes #MK_SYSTEM_LINKER=yes vs head -4 /var/log/build.out.3-no-in-src-dot-conf --- buildworld --- make[1]: "/usr/src/Makefile.inc1" line 343: SYSTEM_COMPILER: libclang will be built for bootstrapping a cross-compiler. make[1]: "/usr/src/Makefile.inc1" line 348: SYSTEM_LINKER: libclang will be built for bootstrapping a cross-linker. --- buildworld_prologue --- # cat /etc/src.conf /etc/make.conf MK_SYSTEM_COMPILER=no MK_SYSTEM_LINKER=no KERNCONF=server MK_SYSTEM_COMPILER=no MK_SYSTEM_LINKER=no
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