From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
MyungJoo Ham <myungjoo.ham@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v5 17/20] PM / devfreq: tegra30: Increase sampling period to 16ms
Date: Tue, 30 Jul 2019 19:22:33 +0300 [thread overview]
Message-ID: <20190730162236.6063-18-digetx@gmail.com> (raw)
In-Reply-To: <20190730162236.6063-1-digetx@gmail.com>
Increase sampling period by 4ms to get a nicer pow2 value, converting
diving into shifts in the code. That's more preferable for Tegra30 that
doesn't have hardware divider instructions because of older Cortex-A9 CPU.
In a result boosting events are delayed by 4ms, which is not sensible in
practice at all.
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/devfreq/tegra30-devfreq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
index 8280f96f4cb9..3543fba74b52 100644
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -67,7 +67,7 @@
* translates to 2 ^ (K_VAL + 1). ex: 2 ^ (6 + 1) = 128
*/
#define ACTMON_AVERAGE_WINDOW_LOG2 6
-#define ACTMON_SAMPLING_PERIOD 12 /* ms */
+#define ACTMON_SAMPLING_PERIOD 16 /* ms */
#define KHZ 1000
--
2.22.0
next prev parent reply other threads:[~2019-07-30 16:22 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-30 16:22 [PATCH v5 00/20] More improvements for Tegra30 devfreq driver Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 01/20] PM / devfreq: tegra30: Change irq type to unsigned int Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 02/20] PM / devfreq: tegra30: Keep interrupt disabled while governor is stopped Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 03/20] PM / devfreq: tegra30: Handle possible round-rate error Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 04/20] PM / devfreq: tegra30: Drop write-barrier Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 05/20] PM / devfreq: tegra30: Set up watermarks properly Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 06/20] PM / devfreq: tegra30: Tune up boosting thresholds Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 07/20] PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 08/20] PM / devfreq: tegra30: Ensure that target freq won't overflow Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 09/20] PM / devfreq: tegra30: Use kHz units uniformly in the code Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 10/20] PM / devfreq: tegra30: Reduce unnecessary interrupts activity Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 11/20] PM / devfreq: tegra30: Use CPUFreq notifier Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 12/20] PM / devfreq: tegra30: Move clk-notifier's registration to governor's start Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 13/20] PM / devfreq: tegra30: Reset boosting on startup Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 14/20] PM / devfreq: tegra30: Don't enable consecutive-down interrupt " Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 15/20] PM / devfreq: tegra30: Constify structs Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 16/20] PM / devfreq: tegra30: Include appropriate header Dmitry Osipenko
2019-07-30 16:22 ` Dmitry Osipenko [this message]
2019-07-30 16:22 ` [PATCH v5 18/20] PM / devfreq: tegra30: Define ACTMON_DEV_CTRL_STOP Dmitry Osipenko
2019-07-31 0:37 ` Chanwoo Choi
2019-07-31 10:55 ` Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 19/20] PM / devfreq: tegra30: Support variable polling interval Dmitry Osipenko
2019-07-30 16:22 ` [PATCH v5 20/20] PM / devfreq: tegra20/30: Add Dmitry as a maintainer Dmitry Osipenko
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