From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965483AbXDNKJv (ORCPT ); Sat, 14 Apr 2007 06:09:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965427AbXDNKJv (ORCPT ); Sat, 14 Apr 2007 06:09:51 -0400 Received: from mtagate4.de.ibm.com ([195.212.29.153]:16291 "EHLO mtagate4.de.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754207AbXDNKJu (ORCPT ); Sat, 14 Apr 2007 06:09:50 -0400 Subject: [RFC] [Patch 0/4] timer_stats slimmed down From: Martin Peschke To: linux-kernel@vger.kernel.org Cc: Andrew Morton , linux-s390@vger.kernel.org, tglx@timesys.com, d.pensator@gmail.com, mingo@redhat.com Content-Type: text/plain Date: Sat, 14 Apr 2007 12:09:47 +0200 Message-Id: <1176545387.5462.108.camel@dix> Mime-Version: 1.0 X-Mailer: Evolution 2.8.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 2.6.21-rc* kernels come with a feature that adds timer statistics to /proc/timer_stats (CONFIG_TIMER_STATS). This patch set makes it use the proposed statistics infrastructure (-mm tree), and adds prequisite functions to the statistics code. The result are noticeable lines of code savings. kernel/time/timer_stats.c which comes with several functions which can be made redundant by using corresponding functions of lib/statistic.c, that is: - accounting - printing output in sequential files - user interface for switching accounting on/off, reset etc. - measuring the accounting time - per-cpu optimisations Function that were missing in lib/statistics, and which are added by this patch set, are: - allow arbitrary keys for statistics entries (e.g. structures) - allow client to label output of statistics entries (e.g. using keys) A secondary effect of the patch set is that we won't add another entry to good old /proc. The statistics infrastructure uses debugfs. This patch set is a prototype that works for me, but which might allow for optimisations. Suggestions are welcome. [Patch 1/4] timer_stats slimmed down: statistics prereq, cleanup [Patch 2/4] timer_stats slimmed down: statistics prereq, labels [Patch 3/4] timer_stats slimmed down: statistics prereq, keys [Patch 4/4] timer_stats slimmed down: using statistics infrastucture Patch set is against 2.6.21-rc6-mm1 and additionaly requires "[Patch] statistics: fix sorted list" posted this morning. Signed-off-by: Martin Peschke