Messages in this thread |  | | Date | Mon, 19 May 2003 19:06:21 -0700 | From | Dan Kegel <> | Subject | Re: Comparing the aio and epoll event frameworks. |
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William Lee Irwin III wrote: > William Lee Irwin III wrote: > >>>I think this would be useful for network daemons that would like to >>>fairly schedule responses (i.e. not re-arm until a client on a given fd >>>deserves a turn again). IRC daemons would appear to be a perfect >>>candidate for such. ... > > > On Mon, May 19, 2003 at 06:37:49PM -0700, Dan Kegel wrote: > >>No need. The plain old edge triggered behavior can handle this >>nicely. > > > AIUI after the iospace on an fd is exhausted the event will be re-armed. > It could probably be taken and then ignored until the client deserves a > response again. Is that what you had in mind?
In edge-triggered mode, epoll will deliver an event only when events warrant it (sic). If you decide to starve a client for a while, that client's fd will only get an event or two as the last bits of I/O to it occur; after that, no more events will come in unless you do some I/O.
So I guess I'm saying "remember the fact that you got the event, but don't do anything about it until you feel like it". - Dan
-- Dan Kegel http://www.kegel.com http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=78045
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