On Thu, Jan 2, 2020 at 5:04 PM Zbigniew Jędrzejewski-Szmek <zbyszek@xxxxxxxxx> wrote: > > On Thu, Jan 02, 2020 at 12:21:26AM +0800, Kairui Song wrote: > > Some component, like Systemd, have grown by a lot, here is a list of > > the size of part of binaries along with the binaries they required in > > F31: > > /root/image/bin/systemctl > > 20M . > > /root/image/usr/bin/systemctl > > 20M . > > /root/image/usr/bin/systemd-cgls > > 20M . > > /root/image/usr/bin/systemd-escape > > 20M . > > /root/image/usr/bin/systemd-run > > 20M . > > ... > > > > There are overlays between the libraries they used so when installed > > into the initramfs, the total size didn't go too big yet. But we can > > see the size of systemd binary and libraries it used is much bigger > > than others. > > All systemd binaries will mostly link to the same libraries (because > they link to a private shared library, which links to various other > shared libraries). So this "20M" will be repeated over and over, but > it's the same dependencies. > > While we'd all prefer for this to be smaller, 20M should is actually > not that much... > > > And as a compare, from version 219 to 243, systemd's library > > dependency increased a lot: > > (v219 is 5M in total, v243 is 20M in total) > > This is slightly misleading. Code was moved from individual binaries > to libsystemd-shared-nnn.so, so if you look at the deps of just a single > binary, you'll see many more deps (because libsystemd-shared-nnn.so has > more deps). But the total number of deps when summed over all binaries > grew much less. A more useful measure would be the size with deps summed > over all systemd binaries that are installed into your image in v219 and > v243. > Yes, you are right. I use following method to measure the size of the binary together with the library it used: Just call dracut-install to install a binary into an empty folder as new root, that tool can also take care of resolve and installing the libraries. The result it like this: With systemd V243: [root@localhost test]# for i in /usr/bin/systemd-*; do /usr/lib/dracut/dracut-install -l -D $(pwd) $i; done [root@localhost test]# for i in /lib/systemd/systemd-*; do /usr/lib/dracut/dracut-install -l -D $(pwd) $i; done [root@localhost test]# /usr/lib/dracut/dracut-install -l -D $(pwd) /lib/systemd/systemd [root@localhost test]# /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/bin/journalctl [root@localhost test]# /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/bin/loginctl [root@localhost test]# /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/bin/systemctl [root@localhost test]# /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/bin/udevadm [root@localhost test]# du -hs . 34M . With V219: [root@localhost test]# for i in /usr/bin/systemd-*; do /usr/lib/dracut/dracut-install -l -D $(pwd) $i; done [root@localhost test]# for i in /usr/lib/systemd/systemd-*; do /usr/lib/dracut/dracut-install -l -D $(pwd) $i; done [root@localhost test]# /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/lib/systemd/systemd [root@localhost test]# /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/bin/journalctl [root@localhost test]# /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/bin/loginctl [root@localhost test]# /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/bin/systemctl [root@localhost test]# /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/bin/udevadm [root@localhost test]# du -hs . 33M . So indeed it didn't grow in total. But kdump's initramfs only need a subset of all binaries, so if I only install the files needed: With V243: [root@localhost test]# for i in systemd systemd-coredump systemd-cgroups-agent systemd-shutdown systemd-reply-password systemd-fsck systemd-udevd systemd-journald systemd-sysctl systemd-modules-load systemd-vconsole-setup; do /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/lib/systemd/$i; done [root@localhost test]# [root@localhost test]# for i in journalctl systemctl udevadm systemd-run systemd-escape systemd-cgls systemd-tmpfiles; do /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/bin/$i; done [root@localhost test]# du -hs . 24M . With V219: [root@localhost test]# for i in systemd systemd-coredump systemd-cgroups-agent systemd-shutdown systemd-reply-password systemd-fsck systemd-udevd systemd-journald systemd-sysctl systemd-modules-load systemd-vconsole-setup; do /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/lib/systemd/$i; done [root@localhost test]# for i in journalctl systemctl udevadm systemd-run systemd-escape systemd-cgls systemd-tmpfiles; do /usr/lib/dracut/dracut-install -l -D $(pwd) /usr/bin/$i; done [root@localhost test]# du -hs . 12M . That did grow a lot. _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
