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Date: Tue, 22 Jan 2008 16:31:48 +0200
From: Stefan Lambrev <stefan.lambrev@moneybookers.com>
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Cc: freebsd-hackers@FreeBSD.org
Subject: Re: gettimeofday() in hping
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Greetings,

Dag-Erling Sm=C3=B8rgrav wrote:
> Dag-Erling Sm=C3=B8rgrav <des@des.no> writes:
>  =20
>> Stefan Lambrev <stefan.lambrev@moneybookers.com> writes:
>>    =20
>>> I tried clock_gettime() (using CLOCK_REALTIME for clock_id), but this=

>>> yield worse performance.
>>>      =20
>> Try CLOCK_MONOTONIC instead.
>>    =20
>
> 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.
>
> DES
>  =20
Thanks for your reply.
I tested all different combination. The performance change is almost=20
invisible (100-200KB/s),
and can't be compared with the performance boost that TSC gain over=20
ACPI-fast timecounter.
Unfortunately TSC doesn't play nice with power saving modes.

--=20

Best Wishes,
Stefan Lambrev
ICQ# 24134177