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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 944C0C43387 for ; Fri, 21 Dec 2018 10:34:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 56383218FD for ; Fri, 21 Dec 2018 10:34:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linaro.org header.i=@linaro.org header.b="W6DQXHCC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389830AbeLUKeO (ORCPT ); Fri, 21 Dec 2018 05:34:14 -0500 Received: from mail-wm1-f65.google.com ([209.85.128.65]:34605 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389775AbeLUKeI (ORCPT ); Fri, 21 Dec 2018 05:34:08 -0500 Received: by mail-wm1-f65.google.com with SMTP id y185so13917664wmd.1 for ; Fri, 21 Dec 2018 02:34:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=bPgIAywPM9tC5+7zzbz0/QmHiK8KUKT68feND5QntSw=; b=W6DQXHCChdKP+2o+Oh49fa6lIRh71HkGhUICeVCvPMojy06LmGOUQMvIdx1GSd+GET 8H21LLIhAcuz+Rbh6uFaBXPQZlJmzy5BdbdOsjES2cX1E/c9qvIJunumoj1n3VyYx8bE 0hCDpcrvgRLc9HD4Ryt8OWk/GGvCZYbjmTFSA= 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:in-reply-to :references; bh=bPgIAywPM9tC5+7zzbz0/QmHiK8KUKT68feND5QntSw=; b=rnM501bmlP5c4buoFJy3ZVTViejg8Z3ReB2GJkDPKx0qubz1x9ZYxsGQ9tSmfqcVzO VnU4lZerpV0neM9p1qNBYCqsvEi/njxe+gQgZpvjGPX6oPjEgIs9nL9ZwP6fik+Vb31e ObsTvsfJABWCn3oL5PAFMQb02qaoVK/u06Nw1vcCSJ+Xa8xBb59VRERRRmDIdVHFTsCq WuoUWiCckM9FKFi8N3lQnaQV/0qANVuK4BAex7DaTokwLMsVVa2ivXILsRbiu72LkZgl mslB9Ip/z6jLx/4Sr3oe3c/J3u6hQKMxPkFwrgCSrBvju1FFwFWJqlss1rt0M57FRLA5 CKpw== X-Gm-Message-State: AA+aEWa0v0sSTiWIaXM8YdrOLXpShMa3aM9OsTNHgGVsEYP37MdaSV/U BgZwwE6FrvA2rgDv+KLGBd49FA== X-Google-Smtp-Source: ALg8bN5V0fT9/T/ZMqUCNnA2Dyv9WjpfIr7MKFC5vro0wkNQIgjgeMOLqSK2w9vrlzzi1cmY/uKYHg== X-Received: by 2002:a1c:570d:: with SMTP id l13mr2344052wmb.139.1545388446921; Fri, 21 Dec 2018 02:34:06 -0800 (PST) Received: from localhost.localdomain ([2a01:e0a:f:6020:ac05:2372:f02d:b03f]) by smtp.gmail.com with ESMTPSA id h10sm10573685wmf.44.2018.12.21.02.34.05 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 21 Dec 2018 02:34:06 -0800 (PST) From: Vincent Guittot To: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, rjw@rjwysocki.net, thara.gopinath@linaro.org, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, airlied@linux.ie, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: ulf.hansson@linaro.org, Vincent Guittot Subject: [PATCH v5 3/3] PM/runtime:Replace jiffies based accounting with ktime based accounting Date: Fri, 21 Dec 2018 11:33:56 +0100 Message-Id: <1545388436-7489-4-git-send-email-vincent.guittot@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1545388436-7489-1-git-send-email-vincent.guittot@linaro.org> References: <1545388436-7489-1-git-send-email-vincent.guittot@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Thara Gopinath This patch replaces jiffies based accounting for runtime_active_time and runtime_suspended_time with ktime base accounting. This makes the runtime debug counters inline with genpd and other pm subsytems which uses ktime based accounting. timekeeping is initialized before pm_runtime_init() so ktime_get() will be ready before first call. In fact, timekeeping_init() is called early in start_kernel() which is way before driver_init() (and that's when devices can start to be initialized) called from rest_init() via kernel_init_freeable() and do_basic_setup(). Signed-off-by: Thara Gopinath [move from ktime to raw nsec] Signed-off-by: Vincent Guittot --- drivers/base/power/runtime.c | 17 +++++++++-------- drivers/base/power/sysfs.c | 11 ++++++++--- include/linux/pm.h | 6 +++--- 3 files changed, 20 insertions(+), 14 deletions(-) diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index e695544..f700524 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -64,8 +64,8 @@ static int rpm_suspend(struct device *dev, int rpmflags); */ void update_pm_runtime_accounting(struct device *dev) { - unsigned long now = jiffies; - unsigned long delta; + u64 now = ktime_to_ns(ktime_get()); + u64 delta; delta = now - dev->power.accounting_timestamp; @@ -75,9 +75,9 @@ void update_pm_runtime_accounting(struct device *dev) return; if (dev->power.runtime_status == RPM_SUSPENDED) - dev->power.suspended_jiffies += delta; + dev->power.suspended_time += delta; else - dev->power.active_jiffies += delta; + dev->power.active_time += delta; } static void __update_runtime_status(struct device *dev, enum rpm_status status) @@ -88,17 +88,18 @@ static void __update_runtime_status(struct device *dev, enum rpm_status status) u64 pm_runtime_suspended_time(struct device *dev) { - unsigned long flags, time; + u64 time; + unsigned long flags; spin_lock_irqsave(&dev->power.lock, flags); update_pm_runtime_accounting(dev); - time = dev->power.suspended_jiffies; + time = dev->power.suspended_time; spin_unlock_irqrestore(&dev->power.lock, flags); - return jiffies_to_nsecs(time); + return time; } EXPORT_SYMBOL_GPL(pm_runtime_suspended_time); @@ -1503,7 +1504,7 @@ void pm_runtime_init(struct device *dev) dev->power.request_pending = false; dev->power.request = RPM_REQ_NONE; dev->power.deferred_resume = false; - dev->power.accounting_timestamp = jiffies; + dev->power.accounting_timestamp = ktime_to_ns(ktime_get()); INIT_WORK(&dev->power.work, pm_runtime_work); dev->power.timer_expires = 0; diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index d713738..96c8a22 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -125,9 +125,12 @@ static ssize_t runtime_active_time_show(struct device *dev, struct device_attribute *attr, char *buf) { int ret; + u64 tmp; spin_lock_irq(&dev->power.lock); update_pm_runtime_accounting(dev); - ret = sprintf(buf, "%i\n", jiffies_to_msecs(dev->power.active_jiffies)); + tmp = dev->power.active_time; + do_div(tmp, NSEC_PER_MSEC); + ret = sprintf(buf, "%llu\n", tmp); spin_unlock_irq(&dev->power.lock); return ret; } @@ -138,10 +141,12 @@ static ssize_t runtime_suspended_time_show(struct device *dev, struct device_attribute *attr, char *buf) { int ret; + u64 tmp; spin_lock_irq(&dev->power.lock); update_pm_runtime_accounting(dev); - ret = sprintf(buf, "%i\n", - jiffies_to_msecs(dev->power.suspended_jiffies)); + tmp = dev->power.suspended_time; + do_div(tmp, NSEC_PER_MSEC); + ret = sprintf(buf, "%llu\n", tmp); spin_unlock_irq(&dev->power.lock); return ret; } diff --git a/include/linux/pm.h b/include/linux/pm.h index e723b78..e5a34e2 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -632,9 +632,9 @@ struct dev_pm_info { int runtime_error; int autosuspend_delay; unsigned long last_busy; - unsigned long active_jiffies; - unsigned long suspended_jiffies; - unsigned long accounting_timestamp; + u64 active_time; + u64 suspended_time; + u64 accounting_timestamp; #endif struct pm_subsys_data *subsys_data; /* Owned by the subsystem. */ void (*set_latency_tolerance)(struct device *, s32); -- 2.7.4 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vincent Guittot Subject: [PATCH v5 3/3] PM/runtime:Replace jiffies based accounting with ktime based accounting Date: Fri, 21 Dec 2018 11:33:56 +0100 Message-ID: <1545388436-7489-4-git-send-email-vincent.guittot@linaro.org> References: <1545388436-7489-1-git-send-email-vincent.guittot@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1545388436-7489-1-git-send-email-vincent.guittot@linaro.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, rjw@rjwysocki.net, thara.gopinath@linaro.org, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, airlied@linux.ie, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: ulf.hansson@linaro.org List-Id: linux-pm@vger.kernel.org RnJvbTogVGhhcmEgR29waW5hdGggPHRoYXJhLmdvcGluYXRoQGxpbmFyby5vcmc+CgpUaGlzIHBh dGNoIHJlcGxhY2VzIGppZmZpZXMgYmFzZWQgYWNjb3VudGluZyBmb3IgcnVudGltZV9hY3RpdmVf dGltZQphbmQgcnVudGltZV9zdXNwZW5kZWRfdGltZSB3aXRoIGt0aW1lIGJhc2UgYWNjb3VudGlu Zy4gVGhpcyBtYWtlcyB0aGUKcnVudGltZSBkZWJ1ZyBjb3VudGVycyBpbmxpbmUgd2l0aCBnZW5w ZCBhbmQgb3RoZXIgcG0gc3Vic3l0ZW1zIHdoaWNoCnVzZXMga3RpbWUgYmFzZWQgYWNjb3VudGlu 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