BIND 10 #2871: Fake work for resolution

[BIND 10 Development]

#2871: Fake work for resolution
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                   Reporter:  vorner    |                 Owner:
                       Type:  task      |                Status:  new
                   Priority:  medium    |             Milestone:  New Tasks
                  Component:  resolver  |              Keywords:
               CVSS Scoring:            |             Sensitive:  0
            Defect Severity:  N/A       |           Sub-Project:  DNS
Feature Depending on Ticket:            |  Estimated Difficulty:  0
        Add Hours to Ticket:  0         |           Total Hours:  0
                  Internal?:  0         |
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 Define set of functions and data structures that would form a fake
 resolution. Something like:

 {{{#!c++
 receive();
 parseQuery();
 renderQuery();
 lookIntoCache();
 upstreamQuery();
 send();
 }}}

 They'd do no useful work, but would contain some workload (like calling an
 empty function 10 million times, or something). Try to guess the balance
 somehow.

 The goal is to test multi threading approaches and we need some workload
 to test it with. This should be as close to the real resolver as we can
 get without actually writing the resolver.

 Some detail can be found in
 https://lists.isc.org/pipermail/bind10-dev/2013-March/004504.html.

 Maybe illustrate how to call the functions too, for example by
 implementing a single-process single-threaded blocking resolver by them
 (eg. no switching between tasks, pick up one, handle and wait for the
 upstream answers in blocking mode).

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Ticket URL: <http://bind10.isc.org/ticket/2871>
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BIND 10 Development