From: Krzysztof Kozlowski <krzk@kernel.org>
To: Lukasz Luba <lukasz.luba@arm.com>
Cc: Chanwoo Choi <cw00.choi@samsung.com>,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, willy.mh.wolff.ml@gmail.com,
k.konieczny@samsung.com, b.zolnierkie@samsung.com,
chanwoo@kernel.org, myungjoo.ham@samsung.com,
kyungmin.park@samsung.com, s.nawrocki@samsung.com,
kgene@kernel.org
Subject: Re: [PATCH 1/2] memory: samsung: exynos5422-dmc: Adjust polling interval and uptreshold
Date: Fri, 10 Jul 2020 14:45:03 +0200 [thread overview]
Message-ID: <20200710124503.GB22897@pi3> (raw)
In-Reply-To: <a676fc18-6f1f-8502-e8d5-5ad1ccf0eec6@arm.com>
On Fri, Jul 10, 2020 at 09:34:45AM +0100, Lukasz Luba wrote:
> Hi Chanwoo,
>
> On 7/9/20 5:08 AM, Chanwoo Choi wrote:
> > Hi Lukasz,
> >
> > On 7/9/20 12:34 AM, Lukasz Luba wrote:
> > > In order to react faster and make better decisions under some workloads,
> > > benchmarking the memory subsystem behavior, adjust the polling interval
> > > and upthreshold value used by the simple_ondemand governor.
> > >
> > > Reported-by: Willy Wolff <willy.mh.wolff.ml@gmail.com>
> > > Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
> > > ---
> > > drivers/memory/samsung/exynos5422-dmc.c | 4 ++--
> > > 1 file changed, 2 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/memory/samsung/exynos5422-dmc.c b/drivers/memory/samsung/exynos5422-dmc.c
> > > index 93e9c2429c0d..e03ee35f0ab5 100644
> > > --- a/drivers/memory/samsung/exynos5422-dmc.c
> > > +++ b/drivers/memory/samsung/exynos5422-dmc.c
> > > @@ -1466,10 +1466,10 @@ static int exynos5_dmc_probe(struct platform_device *pdev)
> > > * Setup default thresholds for the devfreq governor.
> > > * The values are chosen based on experiments.
> > > */
> > > - dmc->gov_data.upthreshold = 30;
> > > + dmc->gov_data.upthreshold = 10;
> > > dmc->gov_data.downdifferential = 5;
> > > - exynos5_dmc_df_profile.polling_ms = 500;
> > > + exynos5_dmc_df_profile.polling_ms = 100;
> > > }
> > >
> >
> > Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
> >
>
> Thank you for the review. Do you think this patch could go through
> your tree together with your patches?
>
> I don't know Krzysztof's opinion about the patch 2/2, but
> I would expect, assuming the patch itself is correct, he would
> like to take it into his next/dt branch.
In the cover letter you mentioned that this is a follow up for the
Chanwoo's patchset. But are these patches really depending on it? Can
they be picked up independently?
The DTS patch must go through arm soc, so I will take it. If it really
depends on driver changes, then it has to wait for next release.
Best regards,
Krzysztof
next prev parent reply other threads:[~2020-07-10 12:45 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-08 15:34 [PATCH 0/2] Exynos5422 DMC: adjust to new devfreq monitoring mechanism Lukasz Luba
2020-07-08 15:34 ` [PATCH 1/2] memory: samsung: exynos5422-dmc: Adjust polling interval and uptreshold Lukasz Luba
2020-07-09 4:08 ` Chanwoo Choi
2020-07-10 8:34 ` Lukasz Luba
2020-07-10 12:45 ` Krzysztof Kozlowski [this message]
2020-07-10 12:56 ` Lukasz Luba
2020-07-10 13:07 ` Krzysztof Kozlowski
2020-07-10 13:49 ` Bartlomiej Zolnierkiewicz
2020-07-10 14:00 ` Lukasz Luba
2020-07-10 14:47 ` Krzysztof Kozlowski
2020-07-10 13:13 ` Marek Szyprowski
2020-07-10 13:19 ` Krzysztof Kozlowski
2020-07-10 13:41 ` Lukasz Luba
2020-07-10 14:49 ` Krzysztof Kozlowski
2020-07-10 15:45 ` Lukasz Luba
2020-07-08 15:34 ` [PATCH 2/2] ARM: dts: exynos: Remove interrupts from DMC controller in Exynos5422 Lukasz Luba
2020-08-17 15:50 ` Krzysztof Kozlowski
2020-08-17 17:17 ` Lukasz Luba
2020-08-21 6:31 ` Krzysztof Kozlowski
2020-08-21 6:32 ` Krzysztof Kozlowski
2020-08-24 11:34 ` Lukasz Luba
2020-10-26 19:57 ` Krzysztof Kozlowski
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=20200710124503.GB22897@pi3 \
--to=krzk@kernel.org \
--cc=b.zolnierkie@samsung.com \
--cc=chanwoo@kernel.org \
--cc=cw00.choi@samsung.com \
--cc=k.konieczny@samsung.com \
--cc=kgene@kernel.org \
--cc=kyungmin.park@samsung.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=lukasz.luba@arm.com \
--cc=myungjoo.ham@samsung.com \
--cc=s.nawrocki@samsung.com \
--cc=willy.mh.wolff.ml@gmail.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).