Re: Measure time

["Serguei I. Ivantsov" <admin@gsc-game.kiev.ua>]

Is there any function like GetTickCount() in M$ Win32 that retrieves time in
milliseconds?

--
 Regards,
  Serguei I. Ivantsov

----- Original Message -----
From: "Der Herr Hofrat" <der.herr@mail.hofr.at>
To: "Serguei I. Ivantsov" <administrator@svitonline.com>
Cc: <linux-gcc@vger.kernel.org>; <linux-kernel@vger.kernel.org>
Sent: Wednesday, May 08, 2002 3:00 PM
Subject: Re: Measure time


> > Hello!
> >
> > Is there any function for high precision time measuring.
> > time() returns only in second. I need nanoseconds.
> >
> you can directly read the TSC but that will not realy give you nanoseconds
> resolution as the actual read access even on a PIII/1GHz is going to take
> up to a few 100 nanoseconds, and depending on what you want to time
> stamp the overall jitter of that code can easaly be in the
> range of a microsecond.
>
> There are some hard-realtime patches to the Linux kernel that will
> allow time precission of aprox. 1us (the TSC has a precission of 32ns)
> but I don't think you can get below that without dedicated hardware.
>
> for RTLinux check at ftp://ftp.rtlinux.org/pub/rtlinux/
>
> hofrat