RFC: Time Library 0.2

[John Meacham]

On Wed, Nov 02, 2005 at 08:19:56PM -0800, John Meacham wrote:
> On Wed, Nov 02, 2005 at 11:43:16AM +0100, Sebastian Sylvan wrote:
> > On 11/2/05, Ashley Yakeley <ashley at semantic.org> wrote:
> > > In article
> > > <3d96ac180511010738h1e3c5206vba7318e724e3cb48 at mail.gmail.com>,
> > >  Sebastian Sylvan <sebastian.sylvan at gmail.com> wrote:
> > >
> > > > Which is why I requested a separate function which just gives the
> > > > picosecs since startup (or something).
> > >
> > > That's what getCPUTime in System.CPUTime does.
> > 
> > No it isnt'. getCPUTime gives the.. uh.. CPU-time :-)
> > 
> > If all my program does is sleep, waiting for other programs to release
> > some resource, then getCPUTime will return zero.
> > 
> > What I'm requesting is a function which gives the number of wall-clock
> > picos seconds since startup, which could be used for all sorts of
> > real-time simulations etc.
> 
> is this true? I always thought that is what getCPUTime was supposed to
> mean, a reading from the tsc on x86 machines for instance and distinct
> from the unix notion of 'cputime'.

hmm.. looking at the report, you are correct. hmm.. perhaps we need
another function to read the tsc-equivalent on various CPUs.

-- 
John Meacham - ⑆repetae.net⑆john⑈