Bug 740042
| Summary: | pass boot performance data to OS | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Lennart Poettering <lpoetter> |
| Component: | grub | Assignee: | Peter Jones <pjones> |
| Status: | CLOSED EOL | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 19 | CC: | jonathan, lkundrak, madhu.chinakonda, mail, pjones |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-02-17 13:53:35 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This bug appears to have been reported against 'rawhide' during the Fedora 19 development cycle. Changing version to '19'. (As we did not run this process for some time, it could affect also pre-Fedora 19 development cycle bugs. We are very sorry. It will help us with cleanup during Fedora 19 End Of Life. Thank you.) More information and reason for this action is here: https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora19 This message is a notice that Fedora 19 is now at end of life. Fedora has stopped maintaining and issuing updates for Fedora 19. It is Fedora's policy to close all bug reports from releases that are no longer maintained. Approximately 4 (four) weeks from now this bug will be closed as EOL if it remains open with a Fedora 'version' of '19'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 19 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. Fedora 19 changed to end-of-life (EOL) status on 2015-01-06. Fedora 19 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed. |
At the plumbers conference this came up, so here's a wishlist bug: Right now in systemd at every boot we print the time the boot process took, split up into three values: kernel, initrd, userspace. I'd like to extend this to two more values: firmware and boot loader. The CoreBoot folks suggested we should simply invoke RDTSC once very early in the grub boot code, and store that away in memory. And then after loading the kernel and the initrd into RAM, right before jumping into the kernel code call it another time. Since the TSC starts counting at 0 very early in the firmware we thus can calculate the time spent in the BIOS and in the boot loader. The two TSC values then would need to be passed to the OS in some way. An easy way would be as parameters on the kernel cmdline ("grub.start_tsc=..." and "grub.end_tsc=..." or so. TSC data can be skewed when used in SMP and in conjunction with certain power management features. However, the CoreBoot folks clarified that this should have little effect until the OS is up, since neither SMP nor PM is used that early and the accuracy needed for this information is very low. It would be the job of the Linux userspace to convert the TSC values into seconds.