bugGNU GRUB - Bugs: bug #38145, Add support for boot benchmarking


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bug #38145: Add support for boot benchmarking

Submitted by:  Jordan Uggla <jordanu>
Submitted on:  Tue 22 Jan 2013 08:05:46 PM UTC  
Category:  None Severity:  Major
Priority:  5 - Normal Item Group:  Feature Request
Status:  None Privacy:  Public
Assigned to:  None Originator Name: 
Open/Closed:  Open Release: 
Release:  Bazaar - trunk Reproducibility:  None
Planned Release:  2.03+

Wed 30 Jan 2013 09:00:11 AM UTC, comment #2:

EFI provides convenient interface to pass information from bootloader to kernel via variables. I am not sure how to do it e.g. on BIOS, except piggybacking on kernel command line.

Am I right that you are not against this idea as long as it is implemented in generic enough way?

Andrei Borzenkov <arvidjaar>
Project Member
Sat 26 Jan 2013 09:00:02 PM UTC, comment #1:

I see no reason to make something like this EFI-specific or in EFI-specific way. This should be all-platform feature. We have a ms-resolution timer on all platforms except very old BIOS-based machines.

Vladimir Serbinenko <phcoder>
Project Administrator
Tue 22 Jan 2013 08:05:46 PM UTC, original submission:

Systemd-analyze can report how much time was spent at boot in firmware initialization and the bootloader if the bootloader sets specific UEFI variables (LoaderTicksInit and LoaderTicksExec) as described here:


This feature is already supported by Gummiboot and appears to be popular.

Separately mentioned in the specification is the LoaderDevicePartUUID variable which is not needed for systemd-analyze and, given that it can change how devices are mounted by systemd at boot, should probably be considered separately from the other two variables.

Jordan Uggla <jordanu>


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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2016-03-02 phcoder Planned ReleaseNone => 2.03+
    2013-01-26 phcoder SummaryPlease add support for UEFI boot performance analysis specification => Add support for boot benchmarking

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