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From: Simon Wright <simon.j.wright@mac.com>
Newsgroups: comp.lang.ada
Subject: Re: real_time.clock is not monotonic
Date: Thu, 22 Feb 2007 20:48:41 +0000
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Date: 2007-02-22T20:48:41+00:00
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Duncan Sands <baldrick@free.fr> writes:
> On Thursday 22 February 2007 11:34:37 Simon Wright wrote:
>> Duncan Sands <baldrick@free.fr> writes:
>> 
>> >>         ("rdtsc" & ASCII.LF & ASCII.HT &
>> >
>> > I think the user needs to have appropriate permissions
>> > for this to work.  In any case, the linux kernel time
>> > support is getting a massive rework as we speak, so
>> > hopefully everything will be perfect soon :)
>> 
>> Works for ordinary users on Windows (certainly up to 2K) and on all
>> the Linuxes I've tried it on (up to Ubunto DD).
>
> I think you just got lucky with linux.

I guess this would be a kernel thing and not a distro thing -- I've
run it on 2.2, 2.4, and 2.6, which others were you thinking of?

Apparently the TSD flag in CR4 can turn of rdtsc, why anyone would
particularly want to I can't think.