git: 77e1ccbee3ed - main - rc: implement parallel boot

[Chris Rees]

Hi,

On 23 February 2021 10:27:34 GMT, Baptiste Daroussin <bapt at FreeBSD.org> wrote:
>The branch main has been updated by bapt:
>
>URL:
>https://cgit.FreeBSD.org/src/commit/?id=77e1ccbee3ed6c837929e4e232fd07f95bfc8294
>
>commit 77e1ccbee3ed6c837929e4e232fd07f95bfc8294
>Author:     Rick Parrish <unitrunker at gmail.com>
>AuthorDate: 2021-02-07 06:15:21 +0000
>Commit:     Baptiste Daroussin <bapt at FreeBSD.org>
>CommitDate: 2021-02-23 10:16:53 +0000
>
>    rc: implement parallel boot
>    
>    take advantage of the rcorder -p argument to implement parallel
>    booting in rc.
>    
>    According to the author non scientific tests:
>    on a Core 2 Duo with spinning disk:
>    
>    | Services enabled | before | after | saving |
>    | 0                | 8s     | 8s    | 0      |
>    | 1                | 13s    | 13s   | 0      |
>    | 2                | 17s    | 13s   | 5      |
>    | 3                | 23s    | 13s   | 10     |
>    | 4                | 28s    | 13s   | 15     |
>    | 5                | 33s    | 13s   | 20     |
>    
>    PR:             249192
>    MFC after:      3 weeks
>---
> libexec/rc/rc | 49 ++++++++++++++++++++++++++++++++++---------------
> 1 file changed, 34 insertions(+), 15 deletions(-)
>
>diff --git a/libexec/rc/rc b/libexec/rc/rc
>index 35db4a850516..722d7fe35884 100644
>--- a/libexec/rc/rc
>+++ b/libexec/rc/rc
>@@ -91,19 +91,31 @@ if ! [ -e ${firstboot_sentinel} ]; then
> 	skip_firstboot="-s firstboot"
> fi
> 
>+# rc_parallel_start default is "NO"
>+rc_parallel_start=${rc_parallel_start:-NO}

Should this go in defaults/rc.conf?

Chris