From: Alex Vinokur <alexvn AT bigfoot DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Getting high resolution time
Date: Sun, 04 Nov 2001 14:06:19 +0200
Organization: Scopus Network Technologies
Lines: 41
Message-ID: <3BE52F3B.C4129F05@bigfoot.com>
References: <Pine DOT SUN DOT 3 DOT 91 DOT 1011104132426 DOT 19105D-100000 AT is>
NNTP-Posting-Host: gateway.scopus.co.il (194.90.203.161)
Mime-Version: 1.0
Content-Type: text/plain; charset=koi8-r
Content-Transfer-Encoding: 7bit
X-Trace: fu-berlin.de 1004875591 34571933 194.90.203.161 (16 [79865])
X-Mailer: Mozilla 4.7 [en] (Win98; I)
X-Accept-Language: en
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com



Eli Zaretskii wrote:

> On Sun, 4 Nov 2001, Alex Vinokur wrote:
>
> > Alex Vinokur wrote:
> >
> > > Is there in DJGPP something like the gethrtime() function in UNIX ?
> >
> > P.S. I need it on Windows98.
>
> Then you should abandon hope to have an accurate timing: Windows has its
> own ideas about what you need.
>
> Our `uclock' does a fairly good job on Windows as well, but be prepared
> to some surprises.

I would like to make clear this point for Windows98 and gpp-2.95.3

I have some function foo().
I would like to measure its average cost-time in nanoseconds, something like
:

start = ????
          for (i = 0; i < iters; i++)
               foo ();
end = ????
printf("Avg time = %lld nsec\n", (end - start) / iters);

Is it possible ?

  ===========================
  Alex Vinokur
    mailto:alexvn AT bigfoot DOT com
    mailto:alexvn AT dr DOT com
    http://up.to/alexvn
    http://go.to/alexv_math
  ===========================