On Wed, 5 Nov 2014 22:02:33 +0300 Ilya Verbin <iver...@gmail.com> wrote:
> Hi, > > On 05 Nov 17:56, Julian Brown wrote: > > +GOMP_OFFLOAD_register_image (void *host_table, void *target_data) > > +GOMP_OFFLOAD_get_table (struct mapping_table **table) > > FYI, these interfaces may change in the near future. > Currently GOMP_OFFLOAD_get_table returns a joint table for all > images, offloaded to a device. But this doesn't work properly with > offloading from dlopened libs. Do you plan to support such cases for > PTX? Perhaps it's worth to replace them with a function like > GOMP_OFFLOAD_load_image, which will offload one image, and return a > target table for this image. In this case there is no need to pass > host_table to the plugin, and return a joint table, since libgomp > will join host and target tables itself. I made some changes to table initialisation on the gomp4 branch also -- probably not enough to genuinely support multiple devices, but hopefully some of the way there. Have you seen those? I haven't considered dlopened libs though. > Another question is what to do with multiple devices of same type. > Can they have different images? There are 2 options: > 1. GOMP_OFFLOAD_load_image will offload one image to one device and > receive a table from it. > or > 2. GOMP_OFFLOAD_register_image will register one image in the plugin > for all devices of same type, and > GOMP_OFFLOAD_get_table will return a table for one image and for one > device. Similarly, I added (partial, in the case of OpenMP) support for multiple devices of the same type on the gomp4 branch. Thanks, Julian
