How do I run bootchart on Fedora 23

Question

My computer takes a long time to boot, and I want to analyze the boot process using bootchart.

On Ubuntu, bootchart is provided as a package that installs a command-line tool. That package is not present in Fedora -- this guide from the Fedora Project states that I should add init=/usr/lib/systemd/systemd-bootchart at the end of the kernel line in the bootloader configuration file.

The file usr/lib/systemd/systemd-bootchart is present on my system, but I don't know how do I proceed in order to activate it upon boot.

I'm using grub as the bootloader, (not sure if it's grub or grub2). My configuration file is in /boot/efi/EFI/fedora/grub.cfg. There's no kernel line in it, or any entry with init=.

Answer 1

Take a look at Making Temporary Changes to a GRUB 2 Menu from the Fedora System Administrators' Guide.* It says:

1. Start the system and, on the GRUB 2 boot screen, move the cursor to the menu entry you want to edit, and press the e key for edit.
2. Move the cursor down to find the kernel command line. The kernel command line starts with linux on 64-Bit IBM Power Series, linux16 on x86-64 BIOS-based systems, or linuxefi on UEFI systems.
3. Move the cursor to the end of the line.
4. Press Ctrl+a and Ctrl+e to jump to the start and end of the line, respectively. On some systems, Home and End might also work.
5. Edit the kernel parameters as required.

In this case, you want to add the init=/usr/lib/systemd/systemd-bootchart parameter.

Then, press Ctrl-x to boot.

A temporary change seems what you probably want for bootchart. If you want to make the change permanent, see Making Persistent Changes to a GRUB 2 Menu Using the grubby Tool.

---

PS: On Fedora 23, you're using GRUB 2.

---

_{* CC-BY-SA 3.0, Copyright © 2015 Red Hat, Inc. and others.}