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Date:   Wed, 26 May 2021 16:51:12 +0200
From:   Pavel Machek <pavel@ucw.cz>
To:     Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc:     Marek =?iso-8859-1?Q?Beh=FAn?= <kabel@kernel.org>,
        linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org,
        linuxarm@huawei.com, mauro.chehab@huawei.com,
        gregkh@linuxfoundation.org
Subject: Re: [PATCH v2 16/17] leds: leds-nuc: add support for changing the
 ethernet type indicator
Message-ID: <20210526145112.GB2141@amd>
References: <20210519141102.0161a9d9@thinkpad>
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Hi!

> > You say that for this controller it would be bad to do in SW, because it
> > would take too much time in BIOS calls. (I wonder how much...)=20
>=20
> Yeah, it would be interesting to know how much. However, measuring BIOS
> latency and time spent on such calls can be tricky: one needs to use a
> high-res clock that it is not used anywhere else, in order to measure
> it.=20

I'm sure you can time kernel compilation while LEDs are using software
netdev trigger, for example.

								Pavel
--=20
http://www.livejournal.com/~pavelmachek

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