linux-kernel - Re: LinuxPPS low-level IRQs timestamps & ldisc

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Date:	Mon, 2 Jun 2008 16:48:40 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Rodolfo Giometti <giometti@...eenne.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: LinuxPPS low-level IRQs timestamps & ldisc

> I prefere avoid the if clause for getnstimeofday() since each
> instruction delay may decrease time precision, so:

Why should everyone else pay the cost of the getnstimeofday they don't
need ?

The single conditional check at the start won't make the slightest
material difference to your accuracy.

Alan
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