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Date: Mon, 28 May 2012 23:50:22 +0300
From: Eli Zaretskii <eliz AT gnu DOT org>
Subject: Re: gprof output
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> From: Georg <dosusb AT googlemail DOT com>
> Date: Mon, 28 May 2012 13:37:54 -0700 (PDT)
> 
> I now removed my _dpmi_int calls from my program but still 80-90% of
> the processing time is done for _dpmi_int. Does djgpp call this
> internally?

Yes.

> I use int86() to query the mouse and getch() plus bioskey() to query
> the keyboard. Could these functions cause this?

Of course!  Any real-mode interrupt call goes through __dpmi_int,
because that's the _only_ way to invoke real-mode DOS/BIOS services
from protected mode.

I'm quite sure this is in the FAQ.