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Date: Tue, 22 Jan 2008 08:34:15 -0500 (EST)
From: Daniel Eischen <deischen@freebsd.org>
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Cc: freebsd-hackers@freebsd.org,
	Stefan Lambrev <stefan.lambrev@moneybookers.com>
Subject: Re: gettimeofday() in hping
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On Tue, 22 Jan 2008, Dag-Erling Sm=C3=B8rgrav wrote:

> Dag-Erling Sm=C3=B8rgrav <des@des.no> writes:
>> Stefan Lambrev <stefan.lambrev@moneybookers.com> writes:
>>> I tried clock_gettime() (using CLOCK_REALTIME for clock_id), but this
>>> yield worse performance.
>> Try CLOCK_MONOTONIC instead.
>
> I forgot - there are also the FreeBSD-specific CLOCK_REALTIME_FAST and
> CLOCK_MONOTONIC_FAST if you can live with a little bit of jitter.

Not to discount any of your suggestions, but isn't the better
performance of gettimeofday() (and perhaps clock_gettime() also)
in Linux because they have access to the time in userland and
can implement it without a system call?  I seem to recall this
being mentioned before, I could be wrong...

--=20
DE
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