linux-kernel - [tip:tracing/core] tracing: optimize recordmcount.pl for offsets-handling

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Message-ID: <tip-dc4f8845ee2ca39fe054a2d911729ffd269b4b66@git.kernel.org>
Date:	Wed, 13 Jan 2010 10:23:39 GMT
From:	tip-bot for Wolfram Sang <w.sang@...gutronix.de>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	rostedt@...dmis.org, w.sang@...gutronix.de, tglx@...utronix.de
Subject: [tip:tracing/core] tracing: optimize recordmcount.pl for offsets-handling

Commit-ID:  dc4f8845ee2ca39fe054a2d911729ffd269b4b66
Gitweb:     http://git.kernel.org/tip/dc4f8845ee2ca39fe054a2d911729ffd269b4b66
Author:     Wolfram Sang <w.sang@...gutronix.de>
AuthorDate: Tue, 5 Jan 2010 19:27:51 +0100
Committer:  Steven Rostedt <rostedt@...dmis.org>
CommitDate: Wed, 6 Jan 2010 13:32:39 -0500

tracing: optimize recordmcount.pl for offsets-handling

- move check for open file in front of the writing loop
- use perl-constructs to access the array

Signed-off-by: Wolfram Sang <w.sang@...gutronix.de>
LKML-Reference: <1262716072-14414-2-git-send-email-w.sang@...gutronix.de>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
 scripts/recordmcount.pl |   18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
index 92f09fe..5de12c7 100755
--- a/scripts/recordmcount.pl
+++ b/scripts/recordmcount.pl
@@ -432,14 +432,14 @@ sub update_funcs
 
     # Loop through all the mcount caller offsets and print a reference
     # to the caller based from the ref_func.
-    for (my $i=0; $i <= $#offsets; $i++) {
-	if (!$opened) {
-	    open(FILE, ">$mcount_s") || die "can't create $mcount_s\n";
-	    $opened = 1;
-	    print FILE "\t.section $mcount_section,\"a\",$section_type\n";
-	    print FILE "\t.align $alignment\n" if (defined($alignment));
-	}
-	printf FILE "\t%s %s + %d\n", $type, $ref_func, $offsets[$i] - $offset;
+    if (!$opened) {
+	open(FILE, ">$mcount_s") || die "can't create $mcount_s\n";
+	$opened = 1;
+	print FILE "\t.section $mcount_section,\"a\",$section_type\n";
+	print FILE "\t.align $alignment\n" if (defined($alignment));
+    }
+    foreach my $cur_offset (@offsets) {
+	printf FILE "\t%s %s + %d\n", $type, $ref_func, $cur_offset - $offset;
     }
 }
 
@@ -514,7 +514,7 @@ while (<IN>) {
     }
     # is this a call site to mcount? If so, record it to print later
     if ($text_found && /$mcount_regex/) {
-	$offsets[$#offsets + 1] = hex $1;
+	push(@offsets, hex $1);
     }
 }
 
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