Sender: root AT gateway DOT cybernet DOT com
Message-ID: <31FD390A.41C67EA6@cybernet.com>
Date: Mon, 29 Jul 1996 18:19:54 -0400
From: "Mark J. Taylor" <mtaylor AT cybernet DOT com>
Organization: Cybernet Systems
MIME-Version: 1.0
To: djgpp AT delorie DOT com
Subject: setitimer() resolution is 18.2 Hz?
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I downloaded v2 last week from ftp.delorie.com, and now I'm writing my
first program.  I've written software for UNIX and DOS for years, so gcc
is not new to me.  :)

I'm using the setitimer() routine to provide a callback at 100 Hz.  The
code works under UNIX (FreeBSD, SunOS, VxWorks, IRIX, etc.) at the
specified rate (up to some maximum dependent on the OS).  It seems that
DJGPP is limiting me to a timer callback rate of 18.2 Hz (9.1 with the
standard SIGTIMR callback routine timer_action(), 18.2 with my own).

Is there a way to make it faster that is accepted?

I've been reprogramming the PIT under DOS for years, but I thought I'd
ask the mailing list before I went hacking too deeply into the sources. 
If this is an area of development, then I'd be glad to provide some
input in the form of code and such.

Please respond to mtaylor AT cybernet DOT com, as I am not currently on the
mailing lists.


-Mark Taylor
Software Engineer
Cybernet Systems Corporation
mtaylor AT cybernet DOT com