From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D42D2C4CEC4 for ; Thu, 19 Sep 2019 17:44:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B0C7F2196E for ; Thu, 19 Sep 2019 17:44:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="dvxGSeR8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391038AbfISRod (ORCPT ); Thu, 19 Sep 2019 13:44:33 -0400 Received: from mail-pf1-f195.google.com ([209.85.210.195]:45134 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389644AbfISRoc (ORCPT ); Thu, 19 Sep 2019 13:44:32 -0400 Received: by mail-pf1-f195.google.com with SMTP id y72so2752064pfb.12 for ; Thu, 19 Sep 2019 10:44:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=3My5rPHh+xjcOd2l7pqQvZ2Y4vTncIcNiQ5r2gPD9Zs=; b=dvxGSeR8Ydg/dXnySlo3RetI39tG54muvsHUyHd7LFJKCB59cubtut29fvPNR+xy7z FpjXlSf7grkgv+cJYFmDlqdmgD3RzdNgNSyNj7od0wEFrnTQ9CXInAUt50ADRikLbnxx 9ObXnDj1dVEdrT+KayscSK+rFgSJ55natJrXo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=3My5rPHh+xjcOd2l7pqQvZ2Y4vTncIcNiQ5r2gPD9Zs=; b=P1EBAfZlUtAacbsmnKNaF94YIHKpolmWiz/XHsw/R9gnPktEQ6E7/dxwRIp7hoteeY z3KbM+1eg8Nhd8fGpS0yKitYBlhmvhwQjpVdXpvSardh8+zAm/BXwxYXHAVco1HQUmPI 1UF5CwacBo5XYe0zZkLn4CMhEf+uoE+VeafoIV0bwxy7Vs4w+7fTLGqzCNz39Jugui2W jcif5V9nHvHznH207REA1FP113VekmjlKlOAeip6iXkSrH4zVdKIQdnYoy4DrbWuVHd6 dUOF8uuqrFT15Lx3AsdlkEjgPbalU56OEChuPHUnpI1vVRJCrMw/WqGgK6HaQ/oFpdZX O1xA== X-Gm-Message-State: APjAAAW5rP+43n+TLAH9lbLqIJCFyjqU0+zjMHuoFnrDDPRpeHfeS60w OhShMPrjk1P5VHJfXn2vfDmv5g== X-Google-Smtp-Source: APXvYqyxoKXWC6PHbldInz20DTbKVvT5kKbs3tnLgXGeHJzM8Oj3iP1ra/anhoDfCzgz801+ueFjGg== X-Received: by 2002:a17:90a:a6e:: with SMTP id o101mr5103405pjo.71.1568915072106; Thu, 19 Sep 2019 10:44:32 -0700 (PDT) Received: from localhost ([2620:15c:202:1:75a:3f6e:21d:9374]) by smtp.gmail.com with ESMTPSA id x68sm10451453pfd.183.2019.09.19.10.44.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 19 Sep 2019 10:44:31 -0700 (PDT) From: Matthias Kaehlcke To: MyungJoo Ham , Kyungmin Park , Chanwoo Choi , Steven Rostedt , Ingo Molnar Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Douglas Anderson , Matthias Kaehlcke Subject: [PATCH v2] devfreq: Add tracepoint for frequency changes Date: Thu, 19 Sep 2019 10:44:23 -0700 Message-Id: <20190919174423.105030-1-mka@chromium.org> X-Mailer: git-send-email 2.23.0.237.gc6a4ce50a0-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a tracepoint for frequency changes of devfreq devices and use it. Signed-off-by: Matthias Kaehlcke --- (sending v2 without much delay wrt v1, since the change in devfreq probably isn't controversial, and I'll be offline a few days) Changes in v2: - included trace_devfreq_frequency_enabled() in the condition to avoid unnecessary evaluation when the trace point is disabled --- drivers/devfreq/devfreq.c | 3 +++ include/trace/events/devfreq.h | 18 ++++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index ab22bf8a12d6..e9f04dcafb01 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -317,6 +317,9 @@ static int devfreq_set_target(struct devfreq *devfreq, unsigned long new_freq, devfreq->previous_freq = new_freq; + if (trace_devfreq_frequency_enabled() && new_freq != cur_freq) + trace_devfreq_frequency(devfreq, new_freq); + if (devfreq->suspend_freq) devfreq->resume_freq = cur_freq; diff --git a/include/trace/events/devfreq.h b/include/trace/events/devfreq.h index cf5b8772175d..a62d32fe3c33 100644 --- a/include/trace/events/devfreq.h +++ b/include/trace/events/devfreq.h @@ -8,6 +8,24 @@ #include #include +TRACE_EVENT(devfreq_frequency, + TP_PROTO(struct devfreq *devfreq, unsigned long freq), + + TP_ARGS(devfreq, freq), + + TP_STRUCT__entry( + __string(dev_name, dev_name(&devfreq->dev)) + __field(unsigned long, freq) + ), + + TP_fast_assign( + __assign_str(dev_name, dev_name(&devfreq->dev)); + __entry->freq = freq; + ), + + TP_printk("dev_name=%s freq=%lu", __get_str(dev_name), __entry->freq) +); + TRACE_EVENT(devfreq_monitor, TP_PROTO(struct devfreq *devfreq), -- 2.23.0.237.gc6a4ce50a0-goog