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From: Federico Giovanardi <federico@giovanardi.dev>
To: Linux Embedded <linux-embedded@vger.kernel.org>
Subject: Deferred probe times
Date: Fri, 23 May 2025 09:56:00 +0200	[thread overview]
Message-ID: <cd10fd7ee9a3b0ce61cf3c1ea3805fbd@giovanardi.dev> (raw)

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Hello,

I was poking around the boot data database while I noticed that the 
deferred_probe initicalls are considered as a giant block;

There is a patch that looks never went upstream to measure them:  
https://lkml.iu.edu/1707.3/02349.html

And another one from me to print the result in the .svg.


Have a nice day
Federico


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[-- Attachment #2: update_bootgraph_deferred_init.patch --]
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commit c8d97bad2987b33b2ce804805071218fd7f68bbd
Author: Federico Giovanardi <federico.giovanardi@cnhind.com>
Date:   Fri Oct 4 14:13:30 2024 +0200

    Update bootgraph to handle deferred initcalls

diff --git a/scripts/bootgraph.pl b/scripts/bootgraph.pl
index 79c903292ae8..8057d9f474df 100755
--- a/scripts/bootgraph.pl
+++ b/scripts/bootgraph.pl
@@ -67,7 +67,8 @@ my $cyheader = 0;
 
 while (<>) {
 	my $line = $_;
-	if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z0-9\_\.]+)\+/) {
+	if ($line =~ /([0-9\.]+)\] calling  ([a-zA-Z0-9\_\.]+)\+/ or
+		$line =~ /([0-9\.]+)\] deferred probe ([a-zA-Z0-9\_\.]+) @/) {
 		my $func = $2;
 		if ($done == 0) {
 			$start{$func} = $1;
@@ -109,6 +110,12 @@ while (<>) {
 			$maxtime = $1;
 		}
 	}
+	if ($line =~ /([0-9\.]+)\] deferred probe ([a-zA-Z0-9\_\.]+).*returned/) {
+		if ($done == 0) {
+			$end{$2} = $1;
+			$maxtime = $1;
+		}
+	}
 
 	if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
 		my $pid = $2;

             reply	other threads:[~2025-05-23  8:01 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-05-23  7:56 Federico Giovanardi [this message]
2025-05-24  0:16 ` Deferred probe times Bird, Tim
2025-05-26  8:14   ` Federico Giovanardi

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