From: Kamil Konieczny <k.konieczny@samsung.com>
To: k.konieczny@samsung.com
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Krzysztof Kozlowski <krzk@kernel.org>,
Kyungmin Park <kyungmin.park@samsung.com>,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
Marek Szyprowski <m.szyprowski@samsung.com>,
MyungJoo Ham <myungjoo.ham@samsung.com>
Subject: [PATCH v3 1/3] devfreq: change time stats to 64-bit
Date: Thu, 5 Dec 2019 15:55:25 +0100 [thread overview]
Message-ID: <20191205145527.26117-2-k.konieczny@samsung.com> (raw)
In-Reply-To: <20191205145527.26117-1-k.konieczny@samsung.com>
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 <k.konieczny@samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
---
Changes in v3:
- changed types of cur_time and last_stats_updated to u64 as this is
returned by get_jiffies_64()
Changes in v2:
- added Acked-by, rebased on linux-next
---
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 bdeb4189c978..abecadeb3dc2 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -199,10 +199,10 @@ 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;
+ u64 cur_time;
lockdep_assert_held(&devfreq->lock);
- cur_time = jiffies;
+ cur_time = get_jiffies_64();
/* Immediately exit if previous_freq is not initialized yet. */
if (!devfreq->previous_freq)
@@ -525,7 +525,7 @@ void devfreq_monitor_resume(struct devfreq *devfreq)
msecs_to_jiffies(devfreq->profile->polling_ms));
out_update:
- devfreq->last_stat_updated = jiffies;
+ devfreq->last_stat_updated = get_jiffies_64();
devfreq->stop_polling = false;
if (devfreq->profile->get_cur_freq &&
@@ -748,7 +748,7 @@ 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);
@@ -756,7 +756,7 @@ 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);
@@ -1470,8 +1470,8 @@ 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..41f15e7a22b8 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;
+ u64 last_stat_updated;
struct srcu_notifier_head transition_notifier_list;
};
--
2.24.0
next prev parent reply other threads:[~2019-12-05 14:55 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20191205145542eucas1p2b39536c9c186d5656f39d214baa32670@eucas1p2.samsung.com>
2019-12-05 14:55 ` [PATCH v3 0/3] devfreq: improve devfreq statistics counting Kamil Konieczny
[not found] ` <CGME20191205145543eucas1p11798d11e91f6a691d5989db7cba81b96@eucas1p1.samsung.com>
2019-12-05 14:55 ` Kamil Konieczny [this message]
2019-12-06 1:37 ` [PATCH v3 1/3] devfreq: change time stats to 64-bit Chanwoo Choi
[not found] ` <CGME20191205145543eucas1p1a317647203c47be07bbcee7867fb3e1e@eucas1p1.samsung.com>
2019-12-05 14:55 ` [PATCH v3 2/3] devfreq: add clearing transitions stats Kamil Konieczny
2019-12-06 2:01 ` Chanwoo Choi
[not found] ` <CGME20191205145544eucas1p17e64389fdee24549a523c624c13194d7@eucas1p1.samsung.com>
2019-12-05 14:55 ` [PATCH v3 3/3] devfreq: move statistics to separate struct Kamil Konieczny
2019-12-06 5:30 ` Chanwoo Choi
[not found] ` <CGME20191206052729epcas1p110d11c728db1ebd7487c8c5fe936df21@epcas1p1.samsung.com>
2019-12-06 5:33 ` [PATCH v4] PM / devfreq: Move statistics to separate struct devfreq_stats Chanwoo Choi
2019-12-06 5:36 ` Chanwoo Choi
[not found] ` <CGME20191206021208epcas1p1d7b3bb434108f38b0ef83b1c7d7a5d79@epcas1p1.samsung.com>
2019-12-06 2:18 ` [PATCH v4] PM / devfreq: add clearing transitions stats Chanwoo Choi
2019-12-06 2:19 ` Chanwoo Choi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20191205145527.26117-2-k.konieczny@samsung.com \
--to=k.konieczny@samsung.com \
--cc=b.zolnierkie@samsung.com \
--cc=cw00.choi@samsung.com \
--cc=krzk@kernel.org \
--cc=kyungmin.park@samsung.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=m.szyprowski@samsung.com \
--cc=myungjoo.ham@samsung.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.