On Wed, Nov 12, 2014 at 11:03:26AM +0000, Julian Brown wrote:
> Thanks for the review! I'll work on addressing your comments. Your
> characterization of the host_nonshm plugin sounds accurate, but OOI,
> what does the Intel MIC plugin do differently that means it is not
> subject to the same problem with target variables?
For the *-intelmicemul-* offloading target, the plugin uses the offloading
library and runs the offloading region in a separate process.
So, x86_64 (or i?86) ELF shared libraries are embedded into the data
sections of your programs, when encountering target region for the first
time it extracts them, saves them into temporary directory as shared
libraries, saves there also a short binary, runs the binary and through
the offloading library communicates between the host (one process) and
offloading target (another process on the same host).
So, you really can use the *-intelmicemul-* offloading yourself too, without
any special hardware, to test OpenACC (at least, as soon as all the
necessary hooks are wired in the plugin if any are missing right now).
Jakub
