On Sun, Aug 4, 2024 at 3:36 PM Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: > > On Sun, Aug 4, 2024 at 5:33 AM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote: > > > > Parallel execution is supported by GNU Make: > > > > $ make -j<N> modules_install > > > > It is questionable to enable multithreading within each zstd process > > by default. > > > > If you still want to do it, you can use the environment variable: > > > > $ ZSTD_NBTHREADS=<N> make modules_install > > > > Hi Masahiro, > > I have some understanding problems. > > [ start-build.txt ] > dileks 24225 24217 0 17:55 tty2 00:00:00 /usr/bin/perf stat > make V=1 -k -j4 ARCH=x86_64 LLVM=1 LLVM=/opt/llvm/bin/ > PAHOLE=/opt/pahole/bin/pahole KBUILD_BUILD_HOST=iniza > KBUILD_BUILD_USER=sedat.dilek@xxxxxxxxx > KBUILD_BUILD_TIMESTAMP=2024-08-03 > KDEB_PKGVERSION=6.10.3-1~trixie+dileks1 > LOCALVERSION=-1-amd64-clang18-kcfi olddefconfig bindeb-pkg > > ^^ How shall someone pass so that ... ZSTD_NBTHREADS=<N> make > modules_install ... is used? Option 1 $ export ZSTD_NBTHREADS=<N> $ make V=1 -k [snip] olddefconfig bindeb-pkg Option 2 $ ZSTD_NBTHREADS=<N> make V=1 -k [snip] olddefconfig bindeb-pkg > > As far as I understood, each kernel-module file is taken - in the > Debian build-process - sequentially file for file - ZSTD compressed > and afterwards deleted. > Is there a benefit when 'make -j<N>' is used? zstd --rm -f -q foo.ko zstd --rm -f -q bar.ko zstd --rm -f -q baz.ko will run in parallel with Make's -j<N> option. -- Best Regards Masahiro Yamada
