[CppAD] Multi-threading with TBB?

[Perry de Valpine]

Hello.  I'm not sure if you prefer queries here or on GitHub.  This is a
general question so I'm sending it to this list.

I'm trying to see whether CppAD's multi-threading features can fit well
with Threading Building Blocks (TBB).  Has anyone combined these
successfully?  The simplest TBB example is here:
https://software.intel.com/en-us/node/506057 . Since TBB abstracts away
thread creation but CppAD seems to require explicit thread management, I'm
not sure if they're a natural fit for each other.  I can start to see how
it might be done but wanted to ask for any suggestions first since I am
relatively new to multi-threading issues.

What I would like to do is create a tape in serial mode and then in
parallel use multiple copies of that tape.  The CppAD examples all show
each thread both creating and using a tape.   Is what I want to do
possible?  I would also like to do this for multiple tapes (of different
operations) that all get created once and then used repeatedly in different
places.

Based on the statements on parallel_ad (
https://coin-or.github.io/CppAD/doc/parallel_ad.htm), which are not totally
clear to me (maybe because I lack the background), does one need to do the
parallel_setup and parallel_AD steps if multiple threads will be used only
for running tapes (ADFun objects) but not making new tapes?

Thanks for the great software.

Perry
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.coin-or.org/pipermail/cppad/attachments/20181219/c5ea1ea3/attachment.html>