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Wed, 13 Nov 2019 09:13:50 +0000 (GMT) From: Kamil Konieczny To: k.konieczny@samsung.com Cc: Bartlomiej Zolnierkiewicz , Chanwoo Choi , Kamil Konieczny , Krzysztof Kozlowski , Kyungmin Park , linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Marek Szyprowski , MyungJoo Ham Subject: [PATCH 1/7] devfreq: change time stats to 64-bit Date: Wed, 13 Nov 2019 10:13:30 +0100 Message-Id: <20191113091336.5218-2-k.konieczny@samsung.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191113091336.5218-1-k.konieczny@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrBKsWRmVeSWpSXmKPExsWy7djPc7r+J0/HGhxeoG2xccZ6VovrX56z WvTt+89oseDTDFaL8+c3sFucbXrDbnF51xw2i8+9Rxgt1h65y25xu3EFmwOXx6ZVnWweB9/t YfLo27KK0ePzJrkAligum5TUnMyy1CJ9uwSujGtnT7MVnBSr+HqnlbmB8blQFyMnh4SAicSX 9RvZuxi5OIQEVjBK3Pz2iBHC+cIoMf37YxYI5zOjxO8lnYwwLcsXdDOB2EICyxklnpwqgOt4 svE9G0iCTUBf4uDZkywgtoiAtETnoolMIEXMAr+ZJLb+2Qs2SVjAUuLZ/ndgk1gEVCWW/ZnA DmLzClhLLJ53jLmLkQNom7zEnLcaIGFOARuJpT/XQJUISpyc+QRsPjNQSfPW2cwg8yUEFrFL 7F10hBniUheJ+2/72SFsYYlXx7dA2TISpyf3sEDY5RJPF/axQzS3MEo8aP8IlbCWOHz8IivI EcwCmhLrd+lDhB0lvnStY4O4jU/ixltBiBv4JCZtmw51Mq9ERxs0eFUlnp/qYYKwpSW6/q9j hbA9JDp2fWSbwKg4C8k3s5B8Mwth7wJG5lWM4qmlxbnpqcVGeanlesWJucWleel6yfm5mxiB 6ef0v+NfdjDu+pN0iFGAg1GJh/fAvFOxQqyJZcWVuYcYJTiYlUR4d1SciBXiTUmsrEotyo8v Ks1JLT7EKM3BoiTOW83wIFpIID2xJDU7NbUgtQgmy8TBKdXA6Cx9yrJY/uHGF0rlz6emH/78 wCbjR5fDTL+uz9w3eE4o8XQa2+2dHz5F2PKV70JfjqBk1/u+M+5NDnk2hUX+d+1to9CTKw/M /nvyZYmG61lW9sLs42fiuoVevxfv+Oz7U3ndCQNzh4L9DwrDN51/u7296SXTFc89t9d8CSz6 dpXlVSrXDOVH95VYijMSDbWYi4oTAfLKs6U7AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprOIsWRmVeSWpSXmKPExsVy+t/xu7r+J0/HGvz9K26xccZ6VovrX56z WvTt+89oseDTDFaL8+c3sFucbXrDbnF51xw2i8+9Rxgt1h65y25xu3EFmwOXx6ZVnWweB9/t YfLo27KK0ePzJrkAlig9m6L80pJUhYz84hJbpWhDCyM9Q0sLPSMTSz1DY/NYKyNTJX07m5TU nMyy1CJ9uwS9jGtnT7MVnBSr+HqnlbmB8blQFyMnh4SAicTyBd1MXYxcHEICSxklVj5+zwaR kJZoPL2aCcIWlvhzrYsNougTo8T2zp3sIAk2AX2Jg2dPsoDYIkANnYsmgk1iFmhklrh4oAms W1jAUuLZ/ndgNouAqsSyPxPAmnkFrCUWzzvG3MXIAbRBXmLOWw2QMKeAjcTSn2vASoSASp5s eMsGUS4ocXLmE7BdzEDlzVtnM09gFJiFJDULSWoBI9MqRpHU0uLc9NxiI73ixNzi0rx0veT8 3E2MwEjZduznlh2MXe+CDzEKcDAq8fAemHcqVog1say4MvcQowQHs5II746KE7FCvCmJlVWp RfnxRaU5qcWHGE2BfpjILCWanA+M4rySeENTQ3MLS0NzY3NjMwslcd4OgYMxQgLpiSWp2amp BalFMH1MHJxSDYz2zwPWH50n9a1s3UGezdn5v/WOqO/NqPwfY7Mi3Y6n+QF//ILYd+sDf9Wb uKX/1Q2Kkq+V5NE+09jwSVHI5Kiufeb6WXn/eWe5XTpSf69U37Wu/8euxSmX8jJ6Pj02e3/S 6lKzdRJvqOvF84WGL/ZaPHGVXbgstjYmZG3R1r5Xt5w7XO7lNSuxFGckGmoxFxUnAgAg3k/s qgIAAA== X-CMS-MailID: 20191113091351eucas1p24afdb94f868b6a7a52b43e81462bb674 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20191113091351eucas1p24afdb94f868b6a7a52b43e81462bb674 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20191113091351eucas1p24afdb94f868b6a7a52b43e81462bb674 References: <20191113091336.5218-1-k.konieczny@samsung.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Change time stats counting to bigger type by using 64-bit jiffies. This will make devfreq stats code look similar to cpufreq stats and prevents overflow (for HZ = 1000 after 49.7 days). Signed-off-by: Kamil Konieczny --- drivers/devfreq/devfreq.c | 14 +++++++------- include/linux/devfreq.h | 4 ++-- 2 files changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index ab22bf8a12d6..1602cca20fc4 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -158,9 +158,9 @@ static int set_freq_table(struct devfreq *devfreq) int devfreq_update_status(struct devfreq *devfreq, unsigned long freq) { int lev, prev_lev, ret = 0; - unsigned long cur_time; + unsigned long long cur_time; - cur_time = jiffies; + cur_time = get_jiffies_64(); /* Immediately exit if previous_freq is not initialized yet. */ if (!devfreq->previous_freq) @@ -478,7 +478,7 @@ void devfreq_monitor_resume(struct devfreq *devfreq) queue_delayed_work(devfreq_wq, &devfreq->work, msecs_to_jiffies(devfreq->profile->polling_ms)); - devfreq->last_stat_updated = jiffies; + devfreq->last_stat_updated = get_jiffies_64(); devfreq->stop_polling = false; if (devfreq->profile->get_cur_freq && @@ -698,7 +698,7 @@ struct devfreq *devfreq_add_device(struct device *dev, devfreq->time_in_state = devm_kcalloc(&devfreq->dev, devfreq->profile->max_state, - sizeof(unsigned long), + sizeof(*devfreq->time_in_state), GFP_KERNEL); if (!devfreq->time_in_state) { mutex_unlock(&devfreq->lock); @@ -706,7 +706,7 @@ struct devfreq *devfreq_add_device(struct device *dev, goto err_devfreq; } - devfreq->last_stat_updated = jiffies; + devfreq->last_stat_updated = get_jiffies_64(); srcu_init_notifier_head(&devfreq->transition_notifier_list); @@ -1423,8 +1423,8 @@ static ssize_t trans_stat_show(struct device *dev, for (j = 0; j < max_state; j++) len += sprintf(buf + len, "%10u", devfreq->trans_table[(i * max_state) + j]); - len += sprintf(buf + len, "%10u\n", - jiffies_to_msecs(devfreq->time_in_state[i])); + len += sprintf(buf + len, "%10llu\n", (u64) + jiffies64_to_msecs(devfreq->time_in_state[i])); } len += sprintf(buf + len, "Total transition : %u\n", diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index 2bae9ed3c783..b81a86e47fb9 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -174,8 +174,8 @@ struct devfreq { /* information for device frequency transition */ unsigned int total_trans; unsigned int *trans_table; - unsigned long *time_in_state; - unsigned long last_stat_updated; + u64 *time_in_state; + unsigned long long last_stat_updated; struct srcu_notifier_head transition_notifier_list; }; -- 2.24.0