lkml.org 
[lkml]   [2003]   [May]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Comparing the aio and epoll event frameworks.
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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:35    [W:0.046 / U:1.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site