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<A NAME="IO bound programs">

13.5 Why is <code>__dpmi_int</code> so heavily used? </A></H3><P>
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<em><strong>Q</strong>: I've profiled my program and found that the routine which takes 60% of the running time is some obscure library function called <code>__dpmi_int.</code>  Can't you guys make
your library right? </em> <p>
<hr> <strong>A</strong>:  Does your program use I/O or other real-mode services (like BIOS) extensively?  All those services are invoked through a DPMI service call which is issued by
<code>__dpmi_int.</code>  So what the profile really says is that the running time of your program is governed by time-consuming operations such as disk I/O.

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