As people know, I've been looking at performance a little, one of the benchmarks is how long the kernel takes to build. I dumped out the task performance data from buildstats for a linux-yocto build (nothing else running):
do_fetch: Elapsed time: 0.04 seconds do_unpack: Elapsed time: 1.61 seconds do_kernel_checkout: Elapsed time: 4.39 seconds do_validate_branches: Elapsed time: 0.47 seconds do_patch: Elapsed time: 57.77 seconds do_kernel_configme: Elapsed time: 44.92 seconds do_kernel_configcheck: Elapsed time: 8.94 seconds do_configure: Elapsed time: 0.60 seconds do_compile: Elapsed time: 72.95 seconds do_compile_kernelmodules: Elapsed time: 34.84 seconds do_populate_lic: Elapsed time: 0.14 seconds do_strip: Elapsed time: 0.03 seconds do_uboot_mkimage: Elapsed time: 0.03 seconds do_install: Elapsed time: 1.87 seconds do_populate_sysroot: Elapsed time: 0.16 seconds do_shared_workdir: Elapsed time: 0.05 seconds do_sizecheck: Elapsed time: 0.03 seconds do_bundle_initramfs: Elapsed time: 0.03 seconds do_kernel_link_vmlinux: Elapsed time: 0.03 seconds do_deploy: Elapsed time: 13.17 seconds do_package: Elapsed time: 31.54 seconds do_packagedata: Elapsed time: 0.59 seconds do_package_qa: Elapsed time: 5.30 seconds do_package_write_ipk: Elapsed time: 83.24 seconds do_package_write_rpm: Elapsed time: 44.58 seconds The "core" was getting blamed for a lot of the build time. As can be seen, the "core" isn't taking that much time now, apart from the fact that ipk packaging seems to be taking twice the time of rpm which needs looking into. Some tasks like the compile tasks are understandable and likely minimised by upstream work already. The other tasks which as consuming a disproportionate amount of time are kernel_configme and patch, I believe we need to look into those a little further too. To put it into context, should the kernel compile be at the same order of magnitude as the patch and configure? Cheers, Richard -- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core
