From: "Grant Jung" <grant.jung@samsung.com>
To: "'Kiwoong Kim'" <kwmad.kim@samsung.com>,
"'Avri Altman'" <Avri.Altman@wdc.com>,
<linux-scsi@vger.kernel.org>, <alim.akhtar@samsung.com>,
<jejb@linux.ibm.com>, <martin.petersen@oracle.com>,
<beanhuo@micron.com>, <asutoshd@codeaurora.org>,
<cang@codeaurora.org>, <bvanassche@acm.org>, <sc.suh@samsung.com>,
<hy50.seo@samsung.com>, <sh425.lee@samsung.com>
Subject: RE: [RFC PATCH v1] ufs: introduce async ufs interface initialization
Date: Tue, 7 Jul 2020 15:50:45 +0900 [thread overview]
Message-ID: <524801d6542a$f0744680$d15cd380$@samsung.com> (raw)
In-Reply-To: <000801d65425$2ce3ad50$86ab07f0$@samsung.com>
> > > When you set uic_link_state during sleep statae to
> > > UIC_LINK_OFF_STATE, UFS driver does interface initialization that is
> > > a series of some steps including fDeviceInit and thus, You might
> > > feel that its latency is a little bit longer.
> > >
> > > This patch is run it asynchronously to reduce system wake-up time.
> > Can you share your initial testing findings?
> > How much time does it save?
>
> Will share when I'm done. And I think you might already know and the time
> is variant per device and its situation, particularly for fDeviceInit.
>
> Thanks.
> Kiwoong Kim
I think it depends on each platform.
I has used this since years ago to reduce system wake-up time and could save about 60ms at that time.
BR
Grant.
next prev parent reply other threads:[~2020-07-07 6:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200702082826epcas2p2face6d1689c2f5efc1dcdb53c19804b8@epcas2p2.samsung.com>
2020-07-02 8:20 ` [RFC PATCH v1] ufs: introduce async ufs interface initialization Kiwoong Kim
2020-07-02 15:43 ` kernel test robot
2020-07-07 6:05 ` Avri Altman
2020-07-07 6:09 ` Kiwoong Kim
2020-07-07 6:50 ` Grant Jung [this message]
2020-07-15 8:35 ` Kiwoong Kim
2020-07-18 20:38 ` Bart Van Assche
2020-07-19 0:27 ` Can Guo
2020-07-19 5:16 ` Can Guo
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