From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932253AbcBAU1s (ORCPT ); Mon, 1 Feb 2016 15:27:48 -0500 Received: from mail.kernel.org ([198.145.29.136]:56012 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753294AbcBAU1p (ORCPT ); Mon, 1 Feb 2016 15:27:45 -0500 Message-Id: <20160201202624.079532484@goodmis.org> User-Agent: quilt/0.61-1 Date: Mon, 01 Feb 2016 15:26:24 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Peter Zijlstra , Thomas Gleixner , Juri Lelli , Clark Williams , Andrew Morton Subject: [RFC][PATCH 0/4] sched: Display deadline bandwidth and other SCHED_DEBUG clean up Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I'm starting to play with SCHED_DEADLINE a bit and I'm able to cause a bandwidth "leak". Then I realized there's no way to examine what bandwidths are enabled on which CPUs. I decided to create a debugfs file that would display the deadline bandwidths. I created a debugfs/sched/ directory to place a "deadline_bw" file that displays the bandwidths of the CPUs in the following format: # cat /sys/kernel/debug/sched/deadline_bw CPU[0]: bw: 996147 total_bw: 0 CPU[1]: bw: 996147 total_bw: 0 CPU[2]: bw: 996147 total_bw: 0 CPU[3]: bw: 996147 total_bw: 0 CPU[4]: bw: 996147 total_bw: 0 CPU[5]: bw: 996147 total_bw: 0 CPU[6]: bw: 996147 total_bw: 0 CPU[7]: bw: 996147 total_bw: 0 I created the debugfs/sched directory in case there's future scheduling data we would like to add, instead of cluttering up the debugfs root. There's already a sched_features file, but I did not want to move it because other tools may need it in its current location. Before adding this code, I also realized there was a bit of SCHED_DEBUG code in the kernel/sched/core.c file, and decided to move that to kernel/sched/debug.c to clean the core.c file up a bit. Those patches are mostly orthognal to the deadline_bw file, but decided to group them together here. Steven Rostedt (Red Hat) (4): sched: Move sched_feature file setup into debug.c sched: Move sched_domain_sysctl to debug.c sched: Move sched_domain_debug into debug.c sched: Add debugfs/sched/deadline_bw file to show current bandwidths ---- kernel/sched/core.c | 434 +------------------------------------------ kernel/sched/debug.c | 511 +++++++++++++++++++++++++++++++++++++++++++++++++++ kernel/sched/sched.h | 30 +++ 3 files changed, 542 insertions(+), 433 deletions(-)