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linuxlinux-kernelbootloadergrubgrub2

How to get grub load/boot statistics?

Is it possible to know how much time grub takes to load files from /boot (vmlinuz and initrd) to the RAM?

As far as I know, the boot command loads and jumps into the kernel according to previous linux and initrd commands without any option to retrieve some stats about the processing.

Solution

  • Reading the source code of commands in grub's repo, I found testspeed which gives the load stats I wanted for a given file into memory:

    grub> testspeed /vmlinuz
File size: 3.40MiB
Elapsed time: 1.571 s
Speed: 2.16MiB/s

grub> testspeed /initrd.img
File size: 48.80MiB
Elapsed time: 8.762 s
Speed: 5.57MiB/s