[libdispatch-dev] GCD MPM for Apache

[Bobby Powers]

yes, that is excellent!  any word on performance?

bobby

On Tue, May 11, 2010 at 11:58 AM, David Leimbach <leimy2k at gmail.com> wrote:
> That's just great!
>
> On Tue, May 11, 2010 at 11:48 AM, Robert N. M. Watson
> <robert at fledge.watson.org> wrote:
>>
>> Dear all:
>>
>> I'm pleased to announce a new GCD-related software project, a GCD MPM for
>> Apache. Apache Multi-Processing Modules (MPMs) allow operating systems to
>> provide execution and concurrency structure to Apache: processes, threads,
>> event management primitives, etc.  It is intended to illustrate both GCD's
>> programming model and programmability benefits, as well as how GCD can be
>> integrated into a existing large-scale and thread-aware application. A quick
>> skim of the code will bring to light some of its key benefits: a work model
>> integrated with the GCD concurrency framework avoids complex utility
>> libraries to distribute work and manage concurrency, and the integration of
>> C Blocks into the programming language avoids the complexity-overhead of a
>> message passing model. The GCD MPM is experimental and illustrative, but we
>> hope it will also be useful in the future!
>>
>> The patch and instructions for applying it can be found on the Mac OS X
>> forge web page:
>>
>>  http://libdispatch.macosforge.org/trac/wiki/apache
>>
>> In the GCD MPM, connections are associated with dispatch queues, which
>> enforce ordered processing of a connection, but allows connections to float
>> across actual OS-provided threads via GCD. The web page says more about the
>> approach, but one interesting observation is that the implementation is
>> around 950 lines of code, vs. the threaded models which come in 1.6x-3x the
>> number of lines.
>>
>> Thanks to Apple for their support of this project!
>>
>> Robert Watson
>> University of Cambridge
>> Computer Laboratory
>> _______________________________________________
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>> libdispatch-dev at lists.macosforge.org
>> http://lists.macosforge.org/mailman/listinfo.cgi/libdispatch-dev
>
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