Xref: utzoo comp.unix.i386:3595 comp.sys.intel:1188
Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!elroy.jpl.nasa.gov!ames!sun-barr!newstop!sun!imagen!atari!portal!portal!cup.portal.com!thinman
From: thinman@cup.portal.com (Lance C Norskog)
Newsgroups: comp.unix.i386,comp.sys.intel
Subject: Re: Tuning Streams
Message-ID: <27916@cup.portal.com>
Date: 16 Mar 90 02:47:54 GMT
References: <4Y62V32xds13@ficc.uu.net> <7191@goofy.Apple.COM>
Organization: The Portal System (TM)
Lines: 11

Ummmmm, I just remembered something.  The reason you see lots of time
charged to the splx() kernel routine is because kernel profiling is
very screwy in regards to interrupts, and all time spent in device 
interrupts is 'adjusted' (in a peculiar way) right after the splx()
routine drops interrupts to 0.  It's not really spending all that time
fiddling the PIC's.

Lance Norskog
Sales Engineer
Streamlined Networks
408-727-9909