Long serial chain - how to make it start building earlier in the build?
This was an EC summit question: My build has a long serial chain and this dominates the build time. At the moment it is started at some point in the middle of the build but there is no specific dependency that requires this. As a result the overall build time is the length of this chain plus whatever time it took to get round to starting it.
How can I get emake to start building this chain at the very beginning of the build so that total build time is minimised?
At the moment I'm using recursive makefiles without any explicit dependencies between them - ordering is effectively controlled by the level at which a makefile appears.
Best Answer
Starting with Accelerator 7.1, the schedule optimization feature provides this functionality. This is enabled by default, so after one build to learn the optimal ordering Accelerator should make the best use of your resources and ensure that the jobs from the longest serial chain are started as soon as possible.
