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<div class="moz-cite-prefix">On 13-07-09 01:55 PM, Steve Martell
wrote:<br>
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Hi John,
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<div>Both of your examples worked just fine on my machine. Only
minor modifications to the makefiles to export the correct path.
Thanks to both Statler and Waldorf for your hard work on this.
I'll have another go at the demo that I was working on in
Seattle. Otherwise I got similar nonlinear run times as the
number of threads increased. Also, hessian calculations are not
multithreaded, right?</div>
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<br>
<br>
Multi processing the Hessian calculations has been done before. It
is one of those "embarassingly parallizable" things i.e<br>
it is easy to do. <br>
<br>
No idea what happened to that effort though. <br>
<br>
The current multi-threading effort is more complicated because the<br>
derivative calculations are spread out over multiple threads. Once
we verify that the thing is viable it remains to<br>
extend the effort to higher derivatives for the random effect stuff.<br>
<br>
<br>
<blockquote cite="mid:375014EE-A474-467C-B60E-E24C5A276E5B@iphc.int"
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<div>S<br>
<div>
<div>On 2013-07-09, at 10:24 AM, "John Sibert (Google Drive)"
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<pre style="font-size:13px; font-family:ArialMT,Arial,sans-serif; white-space:pre-wrap; word-wrap:break-word">Multi-threading has be an ADMB development priority for quite a while. Dave Fournier has made lot of progress over the last year and some prelminary results were presented in the June ADMB developer workshop in Seattle. This document provides a more rigorous assessment of the efficacy of using pthreads in ADMB models. The results show that there is a considerable performance advantage in multi core machines.
The current version of the code is available for checkout on the ADMB Subversion server <a moz-do-not-send="true" href="">svn+ssh://admb-project.org/branches/threaded2</a> Please give it a try. If nobody wants to test it, why are we doing it?
Cheers (and apologies for double posting),
John</pre>
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