From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [103.22.144.67]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 03B361A0045 for ; Mon, 4 Jan 2016 20:25:45 +1100 (AEDT) Received: from e28smtp02.in.ibm.com (e28smtp02.in.ibm.com [125.16.236.2]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4230B1402E2 for ; Mon, 4 Jan 2016 20:25:44 +1100 (AEDT) Received: from localhost by e28smtp02.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 4 Jan 2016 14:55:40 +0530 Received: from d28relay01.in.ibm.com (d28relay01.in.ibm.com [9.184.220.58]) by d28dlp03.in.ibm.com (Postfix) with ESMTP id 98B901258066 for ; Mon, 4 Jan 2016 14:56:17 +0530 (IST) Received: from d28av05.in.ibm.com (d28av05.in.ibm.com [9.184.220.67]) by d28relay01.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u049PZP11114386 for ; Mon, 4 Jan 2016 14:55:35 +0530 Received: from d28av05.in.ibm.com (localhost [127.0.0.1]) by d28av05.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u049PYAg007236 for ; Mon, 4 Jan 2016 14:55:34 +0530 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 v3 0/2] cpufreq: powernv: Redesign the presentation of throttle notification Date: Mon, 4 Jan 2016 14:55:25 +0530 Message-Id: <1451899527-14359-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> In-Reply-To: <1451686914-3761-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> References: <1451686914-3761-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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. Changes from v2: - Fixed kbuild test warning. drivers/cpufreq/powernv-cpufreq.c:609:2: warning: ignoring return value of 'kstrtoint', declared with attribute warn_unused_result [-Wunused-result] Shilpasri G Bhat (2): cpufreq: powernv/tracing: Add powernv_throttle tracepoint cpufreq: powernv: Redesign the presentation of throttle notification drivers/cpufreq/powernv-cpufreq.c | 256 +++++++++++++++++++++++++++++++------- include/trace/events/power.h | 22 ++++ kernel/trace/power-traces.c | 1 + 3 files changed, 236 insertions(+), 43 deletions(-) -- 1.9.3