Date: Tue, 1 Apr 1997 15:19:47 +0100 From: Josef Karthauser <joe@pavilion.net> To: gbeach@cybernet.com Cc: hackers@FreeBSD.ORG Subject: Re: Internal clock Message-ID: <19970401151947.61221@pavilion.net> In-Reply-To: <3340C326.6150@cybernet.com>; from Glenn Beach on Tue, Apr 01, 1997 at 09:11:18AM %2B0100 References: <3340C326.6150@cybernet.com>
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On Tue, Apr 01, 1997 at 09:11:18AM +0100, Glenn Beach wrote:
> I have been searching for an answer to the following question. Doug
> White at questions@freebsd.org said that you may be able to help. So
> here it goes:
>
> How can I make time measurements in increments smaller than the clock
> tick? Specifically, I am running BSD on a Pentium PC which has 128
> clock ticks per second. Is there any way to improve the resolution?
>
I'm using gettimeofday which returns:
struct timeval {
long tv_sec; /* seconds since Jan. 1, 1970 */
long tv_usec; /* and microseconds */
};
I've no idea of the actual system resolution, but I assume (without
checking the source code) that the kernel will provide the best
resolution available to the system.
BTW a question to the hackers... does anyone have any plans for
adding a real-time scheduling class, aka threads under solaris?
I'm writing some midi software and could really do with a real-time
class thread to handle the timing subsystem.
Joe
--
Josef Karthauser
Technical Manager Email: joe@pavilion.net
Pavilion Internet plc. [Tel: +44 1273 607072 Fax: +44 1273 607073]
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