Date: Wed, 25 Oct 1995 06:52:22 +1000 From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, dennis@etinc.com Cc: hackers@freebsd.org Subject: Re: Async utilization..... Message-ID: <199510242052.GAA32111@godzilla.zeta.org.au>
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>>>Figure out the processing requirement for handling one average frame size of >>> bytes with a 16450 with 8-bit I/O cycles and loads of interrupts, add 20% >>>and compare >> [finally enough data to overwhelm Dennis :-)] >>>it to a single interrupt and one 16-bit bus transfer per frame. It doesn't >>>take a rocket scientist >>>to know there's a signficant difference in processing requirements. >> >>The factor tends to get reduced a lot by non-data i/o's and protocol >>protocol processing. >This is way too much to have to figure out.....I was talking much more >philosophically...... Yes, I usually just count the i/o accesses and interrupts myself. Bruce
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