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Date: Wed, 6 Mar 2002 12:45:01 -0800 (PST)
From: dean gaudet <dean-list-linux-kernel@arctic.org>
To: Ben Greear <greearb@candelatech.com>
cc: Davide Libenzi <davidel@xmailserver.org>,
        linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: a faster way to gettimeofday?
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On Tue, 5 Mar 2002, Ben Greear wrote:

>
> Davide Libenzi wrote:
>
> > If you're on x86 you can use collect rdtsc samples and convert them to ms.
> > You'll get even more then ms accuracy.
>
>
> Can I do this from user space?  If so, any examples or docs
> you can point me to?
>
> Also, I'm looking primarily for a speed increase, not an accuracy
> increase.

ingo started the proper work for this, for example, see:
<http://people.redhat.com/mingo/vsyscall-patches/vsyscall-2.3.32-F4>
(there's a documentation file near the bottom of the patch)  but it
doesn't appear to support gettimeofday via rdtsc yet.

-dean


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