From: loody <miloody@gmail.com>
To: linux-kernel@vger.kernel.org,
Kernel Newbies <kernelnewbies@nl.linux.org>
Subject: why kernel implement "udelay" by cpu instructions?
Date: Mon, 2 Nov 2009 11:13:51 +0800 [thread overview]
Message-ID: <3a665c760911011913q268b010cqb5da4f79df995b9b@mail.gmail.com> (raw)
Dear all:
I find the kernel use cpu instruction to implement the udelay function
as keeping decrease a big counter by 1.
If I search the right place in kernel, why kernel does so?
the precision will be different if cpu runs faster or slower, right?
appreciate your help,
miloody
next reply other threads:[~2009-11-02 3:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-02 3:13 loody [this message]
2009-11-02 4:45 ` Rik van Riel
2009-11-04 2:19 ` loody
2009-11-04 5:01 ` Rajat Jain
2009-11-04 5:36 ` Bryan Donlan
2009-11-04 5:45 ` Rajat Jain
2009-11-04 14:16 ` Rik van Riel
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