From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752530AbcAAWWs (ORCPT ); Fri, 1 Jan 2016 17:22:48 -0500 Received: from e28smtp07.in.ibm.com ([125.16.236.7]:39198 "EHLO e28smtp07.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752086AbcAAWWn (ORCPT ); Fri, 1 Jan 2016 17:22:43 -0500 X-IBM-Helo: d28dlp01.in.ibm.com X-IBM-MailFrom: shilpa.bhat@linux.vnet.ibm.com X-IBM-RcptTo: linux-kernel@vger.kernel.org;linux-pm@vger.kernel.org From: Shilpasri G Bhat To: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org Cc: rjw@rjwysocki.net, viresh.kumar@linaro.org, linux-pm@vger.kernel.org, pc@us.ibm.com, Shilpasri G Bhat Subject: [PATCH v2 0/2] cpufreq: powernv: Redesign the presentation of throttle notification Date: Sat, 2 Jan 2016 03:51:52 +0530 Message-Id: <1451686914-3761-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.3 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16010122-0025-0000-0000-000008FFD77E Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In POWER8, OCC(On-Chip-Controller) can throttle the frequency of the CPU when the chip crosses its thermal and power limits. Currently, powernv-cpufreq driver detects and reports this event as a console message. Some boxes may not sustain the max turbo frequency in all conditions and can be throttled frequently. This can lead to the flooding of console with throttle messages. So this patchset aims to redesign the presentation of this event via sysfs counters and tracepoints. This patchset will add a perf trace point "power:powernv_throttle" and sysfs throttle counter stats in /sys/devices/system/cpu/cpufreq/chipN. Shilpasri G Bhat (2): cpufreq: powernv/tracing: Add powernv_throttle tracepoint cpufreq: powernv: Redesign the presentation of throttle notification drivers/cpufreq/powernv-cpufreq.c | 247 +++++++++++++++++++++++++++++++------- include/trace/events/power.h | 22 ++++ kernel/trace/power-traces.c | 1 + 3 files changed, 227 insertions(+), 43 deletions(-) -- 1.9.3