From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758254AbZE0Wf3 (ORCPT ); Wed, 27 May 2009 18:35:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757422AbZE0WfI (ORCPT ); Wed, 27 May 2009 18:35:08 -0400 Received: from hera.kernel.org ([140.211.167.34]:59570 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756395AbZE0WfF (ORCPT ); Wed, 27 May 2009 18:35:05 -0400 Date: Wed, 27 May 2009 22:34:35 GMT From: tip-bot for Li Zefan To: linux-tip-commits@vger.kernel.org Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com, fweisbec@gmail.com, rostedt@goodmis.org, lizf@cn.fujitsu.com, tglx@linutronix.de Reply-To: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, fweisbec@gmail.com, lizf@cn.fujitsu.com, rostedt@goodmis.org, tglx@linutronix.de In-Reply-To: <4A14EDB6.2050507@cn.fujitsu.com> References: <4A14EDB6.2050507@cn.fujitsu.com> Subject: [tip:tracing/core] tracing/events: change the type of __str_loc_item to unsigned short Message-ID: Git-Commit-ID: b0aae68cc5508f3c2fbf728988c954db4c8b8a53 X-Mailer: tip-git-log-daemon MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (hera.kernel.org [127.0.0.1]); Wed, 27 May 2009 22:34:39 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: b0aae68cc5508f3c2fbf728988c954db4c8b8a53 Gitweb: http://git.kernel.org/tip/b0aae68cc5508f3c2fbf728988c954db4c8b8a53 Author: Li Zefan AuthorDate: Thu, 21 May 2009 13:59:18 +0800 Committer: Frederic Weisbecker CommitDate: Tue, 26 May 2009 00:15:21 +0200 tracing/events: change the type of __str_loc_item to unsigned short When defining a dynamic size string, we add __str_loc_##item to the trace entry, and it stores the location of the actual string in entry->_str_data[] 'unsigned short' should be sufficient to store this information, thus we save 2 bytes per dyn-size string in the ring buffer. [ Impact: reduce memory occupied by dyn-size strings in ring buffer ] Signed-off-by: Li Zefan Cc: Steven Rostedt LKML-Reference: <4A14EDB6.2050507@cn.fujitsu.com> Signed-off-by: Frederic Weisbecker --- include/trace/ftrace.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index edb02bc..b5ff2e8 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -25,7 +25,7 @@ #define __field(type, item) type item; #undef __string -#define __string(item, src) int __str_loc_##item; +#define __string(item, src) unsigned short __str_loc_##item; #undef TP_STRUCT__entry #define TP_STRUCT__entry(args...) args