On Tue, Oct 18, 2016 at 3:38 AM, Ming Lei <[email protected]> wrote: > On Tue, Oct 18, 2016 at 12:04 AM, Sedat Dilek <[email protected]> wrote: >> Hi Linus, >> >> not sure whom to address on this issue. >> >> I have built Linux v4.9-rc1, v4.8.2 and v4.4.25 kernels (in this >> order) this morning. >> >> Building a Linux v4.8.2 under Linux v4.9-rc1 took two times longer. >> >> As usually I build with 2 parallel-make-jobs. >> This takes approx. 30mins. >> Under Linux v4.9-rc1 it took approx. an hour. >> >> My system is a Ubuntu/precise AMD64 (WUBI installation). >> I use my normal build-environment. >> >> If you need further informations, please let me know. > > Kernel building is more like a CPU-bound workload, so maybe > some clues can be got by comparing results of 'perf top/record', > which should be very easy to collect. >
I have no big experiences with perf. Last I played was testing early days of "lockdep" feature. Can you give some clear instructions on how to use perf top/record in this scenario? - Sedat - >> >> Regards, >> - Sedat - >> >> P.S.: Listing content of attached tarball file. >> >> $ LC_ALL=C ls -R >> .: >> build-time configs scripts toolchain-amd64 >> >> ./build-time: >> ls-alt_building-4-4-25-under-4-8-2.txt >> ls-alt_building-4-8-2-under-4-9-0-rc1.txt >> >> ./configs: >> WHATS-IN-DILEKS-LINUX-KERNEL.txt config-4.4.25-1-iniza-small >> config-4.8.2-1-iniza-small config-4.9.0-rc1-1-iniza-small >> >> ./scripts: >> build_linux-upstream.sh >> >> ./toolchain-amd64: >> HOST-AND-BUILD-TOOLCHAIN.txt > > > > Thanks, > Ming Lei
