= Job-level scheduler customization =

sched/sched_customize.cpp contains the following function:
{{{
bool wu_is_infeasible_custom(WORKUNIT& wu, APP& app, BEST_APP_VERSION& bav);
}}}

This is called for every job that the scheduler
considers dispatching.
If it returns true, the scheduler won't send the job to this host.
This allows you to make project-specific scheduling decisions on a per-job basis.

The default implementation simply returns false.
However, you can customize it.
The source code contains (commented out) the following possible policies:

 * Don't use GPU versions for particular jobs.
 * Require a certain number of GPU processors, as specified by WU.batch.
 * Reduce the FLOPS estimate for particular jobs.