tracing/fastboot: fix row order in bootgraph.pl

When bootgraph.pl parses a file, it gives one row for each initcall's pid. But they are displayed in random (perl hash) order. Let's sort the pids by the start time of their first initcall instead. This helps trace module initcalls, where each has a separate pid. bootgraph.pl will show module initcalls during the initramfs; it may also be adapted to show subsequent module initcalls. Signed-off-by: Alan Jenkins <[email protected]> Acked-by: Frédéric Weisbecker <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
mrcsosa · Oct 22, 2008 · 06d1cd2 · 06d1cd2
1 parent 2a813f8
commit 06d1cd2
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/scripts/bootgraph.pl b/scripts/bootgraph.pl
@@ -108,9 +108,9 @@
 my $stylecounter = 0;
 my %rows;
 my $rowscount = 1;
+my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
 my $key;
-my $value;
-while (($key,$value) = each %start) {
+foreach $key (@initcalls) {
 	my $duration = $end{$key} - $start{$key};
 
 	if ($duration >= $threshold) {
@@ -121,7 +121,7 @@
 			$rows{$pid} = $rowscount;
 			$rowscount = $rowscount + 1;
 		}
-		$s = ($value - $firsttime) * $mult;
+		$s = ($start{$key} - $firsttime) * $mult;
 		$s2 = $s + 6;
 		$e = ($end{$key} - $firsttime) * $mult;
 		$w = $e - $s;