From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932739AbaGRFUf (ORCPT ); Fri, 18 Jul 2014 01:20:35 -0400 Received: from relais.videotron.ca ([24.201.245.36]:62580 "EHLO relais.videotron.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760193AbaGRFUe (ORCPT ); Fri, 18 Jul 2014 01:20:34 -0400 Content-transfer-encoding: 7BIT From: Nicolas Pitre To: Steven Rostedt , Ingo Molnar , Daniel Lezcano , Russell King - ARM Linux , Catalin Marinas Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-kernel@lists.linaro.org Subject: [PATCH 0/4] basic IPI tracing Date: Fri, 18 Jul 2014 01:18:51 -0400 Message-id: <1405660735-13408-1-git-send-email-nicolas.pitre@linaro.org> X-Mailer: git-send-email 1.8.4.108.g55ea5f6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Part of the energy aware scheduler work is concerned by test and measurement tools such as idlestat[1]. This relies on the ability to trace wake-up events, mainly IRQs and IPIs. While IRQs are already well instrumented with tracepoints, IPIs are rather lacking on that front, and completely invisible on ARM. This series defines generic IPI tracepoints and adds them to ARM and ARM64. An attempt at adding them to X86 is also included for comments. [1] https://wiki.linaro.org/WorkingGroups/PowerManagement/Resources/Tools/Idlestat diffstat: arch/arm/kernel/smp.c | 72 ++++++++++++++++++++------------ arch/arm64/kernel/smp.c | 67 +++++++++++++++++++----------- arch/x86/kernel/smp.c | 16 ++++++++ include/trace/events/ipi.h | 89 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 192 insertions(+), 52 deletions(-)