On Fri, 12 Nov 1999 00:12:13 -0800, "David Schwartz"
<davids@webmaster.com> said:
>> The signal model gives you the best of both worlds: low overhead
>> when only a few fd's at a time need attention (no linear scan),
>> and low overhead when they all do (same as old poll() method,
>> but with the extra overhead of a single SIGIO).
> That's pretty cool, actually.
If you think it sounds cool in theory, try watching it in action. The
kernel support is in 2.3, and there is a simple static http server demo
of the user-mode code in
http://people.redhat.com/zab/phhttpd/
It's just a demonstration-of-concept in its current form, but the
performance results are rather nice.
--Stephen
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