git: 40b287054521 - main - mi_startup: Instrument the bubblesort with TSLOG

The branch main has been updated by cperciva:

URL: https://cgit.FreeBSD.org/src/commit/?id=40b287054521f0a92e5ae9a26e6a87d17ee85eea

commit 40b287054521f0a92e5ae9a26e6a87d17ee85eea
Author:     Colin Percival <cperciva@FreeBSD.org>
AuthorDate: 2023-05-19 13:46:42 +0000
Commit:     Colin Percival <cperciva@FreeBSD.org>
CommitDate: 2023-05-19 13:46:42 +0000

    mi_startup: Instrument the bubblesort with TSLOG
    
    The bubblesort of SYSINITs is currently responsible for 7% of the
    kernel boot time when booting a 1 CPU / 128 MB VM under Firecracker.
    
    It needs to be replaced with a faster sort, but until that happens
    at least instrumenting it with TSLOG makes it show up in flamecharts.
---
 sys/kern/init_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c
index 1974c4e68ce4..e4cb501bc57b 100644
--- a/sys/kern/init_main.c
+++ b/sys/kern/init_main.c
@@ -255,6 +255,7 @@ restart:
 	 * Perform a bubble sort of the system initialization objects by
 	 * their subsystem (primary key) and order (secondary key).
 	 */
+	TSENTER2("bubblesort");
 	for (sipp = sysinit; sipp < sysinit_end; sipp++) {
 		for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
 			if ((*sipp)->subsystem < (*xipp)->subsystem ||
@@ -266,6 +267,7 @@ restart:
 			*xipp = save;
 		}
 	}
+	TSEXIT2("bubblesort");
 
 	last = SI_SUB_COPYRIGHT;
 #if defined(VERBOSE_SYSINIT)