How to run with DLB

Generally, in order to run DLB with your application, you need to follow these steps:

1. Link or preload (via LD_PRELOAD) your application with any flavour of the DLB shared libraries. We recommend libdlb.so for simplicity, although you can choose other flavours like MPI, debug or instrumentation. Note, that you can also choose a different version of the library at runtime via the LD_PRELOAD mechanism.

2. Configure the environment variable DLB_ARGS with the desired DLB options. Typically, you will want to set at least --lewi, --drom, -talp`, or any combination of them. Execute dlb --help for a list of options

3. Run you application as you would normally do.

Jump into the following sections for a more detailed description of each use case:

• LeWI for improving Load Balance in Applications
• DROM for making the application react to changes in the CPU affinity
• TALP for monitoring the Programming Model efficiencies